CN103900666A - Long-time running measuring precision control method of membrane type gas meter - Google Patents

Long-time running measuring precision control method of membrane type gas meter Download PDF

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CN103900666A
CN103900666A CN201410154245.XA CN201410154245A CN103900666A CN 103900666 A CN103900666 A CN 103900666A CN 201410154245 A CN201410154245 A CN 201410154245A CN 103900666 A CN103900666 A CN 103900666A
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gas meter
diaphragm gas
indication
running
diaphragm
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CN103900666B (en
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魏东
曹绍春
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SICHUAN HAILI INTELLIGENT & TECHNOLOGY CO., LTD.
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Sichuan Haili Intelligent & Technology Co Ltd
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Abstract

The invention discloses a long-time running measuring precision control method of a membrane type gas meter, wherein the method can guarantee measuring precision of the gas meter after the gas meter runs for a long time. The method comprises the steps that A, a test place for testing the membrane type gas meter is selected, test devices are prepared, and the tested membrane type gas meter is selected; B, indication errors of the membrane type gas meter are tested so as to obtain an error curve; C, when the membrane type gas meter finishes running-in according to different quantities of running-in, the step B is repeated to obtain the error curves of different quantities of running-in; D, an aging curve of the membrane type gas meter is obtained by means of the error curves, obtained in the step B and the step C, of the membrane type gas meter under different quantities of running-in; E, an aging compensation module is arranged on the membrane type gas meter; F, the aging curve is input into the aging compensation module, and reading of the membrane type gas meter is corrected through the aging compensation module. By the adoption of the method, reading precision of the gas meter can be guaranteed after the gas meter is used for a long time, the service life of the gas meter is prolonged, and use cost of the gas meter is lowered.

Description

The measuring accuracy control method of diaphragm gas meter long-time running
Technical field
The present invention relates to a kind of method of controlling diaphragm gas meter measuring accuracy, especially a kind of measuring accuracy control method of diaphragm gas meter long-time running.
Background technology
Known: at present, pipe gas uses very widely as clean energy resource, diaphragm gas meter as the very important a kind of measuring instrument of pipe gas trade settlement, its metering performance index is very crucial undoubtedly, especially measuring accuracy when long-time running.Up-to-date national standard " diaphragm gas meter " GB/T6968-2011 and diaphragm gas meter national verification code JJG577-2012 regulation, the measuring accuracy of diaphragm gas meter in the time dispatching from the factory calibrating is as following table:
Index Content Unit Index
Error in dipping q min≤q≤0.1q max % ≤±3
Error in dipping 0.1q max≤q≤q max % ≤±1.5
To in using and the diaphragm gas meter measuring accuracy index finished after endurancing provide as follows table:
Index Content Unit Index
Error in dipping q min≤q≤0.1q max % ≤±6
Error in dipping 0.1q max≤q≤q max % ≤±3
Due to the product inherent characteristic of diaphragm gas meter, when calibrating is dispatched from the factory in existence, gauging of products precision is better, but after bringing into use, the actual conditions that its measuring accuracy declines rapidly.Can see from above form, in the time of the national diaphragm gas meter product standard of working out and inspection procedure, consider the performance actual conditions of current diaphragm gas meter, so the diaphragm gas meter measuring accuracy fall after bringing into use has been made to above agreement.To above two tabular analysis, to be not difficult to find out, error in dipping changes maximum permissible value (q min≤ q ﹤ 0.1q max) be 9%, error in dipping changes maximum permissible value (0.1q max≤ q≤q max) be 4.5%.
The amplitude that this measuring accuracy declines is very large, and the measurement shoutage of gas company is bought combustion gas and sold combustion gas tolerance difference and exist always, generally sells air output and is less than and buys tolerance value.At present, the transportation difference rate general control of domestic larger gas company's rock gas is 6%～7%, what management level were higher can be controlled at 5% left and right, because the transportation difference rate of former artificial gas supply system is larger, and with reference to the actual average transportation difference rate that uses rock gas area, carry the normal loss existing to calculate by the normal transportation difference rate rock gas of production and operation by city gas distributing network, suggestion Natural Gas Enterprises can be made as 5%～6% by transportation difference rate control target.Measurement shoutage is insoluble problem concerning each gas company, and defeated extent is often as the important technology economic target of evaluating and weigh gas company's operation and management level.The magnitude relationship of measurement shoutage, to the height of production cost, directly affects the economic benefit of gas company, relates to developing direction and the investment decision of gas company.
Had at present utility model patent that the number of patent application declared is 201320629885.2 provide a kind of diaphragm gas meter of electronical display, this patent provide a kind of with electronic counter to replace the Intelligent diaphragm gas meter of mechanical counter.The technical scheme of its invention is, in the upper and lower casing of common diaphragm gas meter, assembling core of membrane type gas meter gauge assembly, on movement gauge assembly, be equipped with magnetic conductivity transmission gear and sampling sensor, in the time that movement metering is rotated, sampling sensor collects and represents that one determines combustion gas bulking value periodic pulse signal, and sampling sensor passes to periodic pulse signal after master control borad calculates and is presented in LCD MODULE.The bulking value showing or number of pulses and standard scale bulking value compare, can obtain the error in dipping value of diaphragm gas meter, after proofreading and correct by correction coefficient, the error in dipping of diaphragm gas meter can approach 0 in theory, due to the error in dipping value difference of each flow point self of diaphragm gas meter, through the correction of multiple flow points, can in the measures range of diaphragm gas meter, the metering curve of diaphragm gas meter be adjusted to perfect condition, the correction coefficient smooth curve that above each point obtains connects the curve obtaining and can be understood as precision fair curve.This summary of the invention has solved the not high problem of diaphragm gas meter measuring accuracy, but still does not solve the problem of long-time running precise decreasing.Because physical construction of its inner metering of diaphragm gas meter long-time running is low because wearing and tearing make to measure result precision, produce negative value error, error is along with the prolongation meeting of service time is increasing, thereby brings economic loss.Therefore the term of life of diaphragm gas meter is shorter, to diaphragm gas meter frequently replacing can make diaphragm gas meter use cost increase.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of measuring accuracy control method that can ensure the diaphragm gas meter long-time running of measuring accuracy after diaphragm gas meter long-time running.
The technical solution adopted for the present invention to solve the technical problems is: by the diaphragm gas meter sampling to sizing batch steady production, constantly operation test error of indication situation of change, pass through again statistical study, the statistics error of indication aging curve corresponding to actual life of the diaphragm gas meter entirety sample of the model that obtains sampling.Then will main control module be set on diaphragm gas meter, be designed to a kind of electronic type diaphragm gas meter.Aging curve obtained above is write to the compensation of ageing module on the main control module of the electronic gas table based on the exploitation of above model diaphragm gas meter, by compensation of ageing module, common diaphragm gas meter error of indication result is revised, ensured that gas meter, flow meter long-time running precision reaches perfect condition.
Adopting above method is to be pure physical construction based on diaphragm gas meter, and due to identical machine construction principle, the product material after sizing has the consistent characteristic of height, and not changing design and when parts, product is the meter characteristic that possesses high consistency.The aging curve data that therefore can go out by sample testing can be used as the aging precision characteristic of generality of approved product.This parameter can be used as the foundation of electronic compensation, thereby improves gas meter, flow meter measuring accuracy.
For the mensuration of the general aging curve parameter of fixing model gas meter, flow meter and utilize this parameter to realize the measuring accuracy control method of the diaphragm gas meter long-time running of compensation, comprise the following steps:
A, the diaphragm gas meter of sizing batch production through the error in dipping test of dispatching from the factory laggard enter in the product of storehouse, choose at random one group as tested diaphragm gas meter; Select the testing location of test diaphragm gas meter and be ready to proving installation, described proving installation comprises compressed air source unit and standard set-up, and the environment of testing location must meet the regulation of JJG577-2012 standard completely; Be that atmospheric pressure is 86～106kPa, temperature is 20 ± 2 DEG C, and relative humidity is 45%～75%, and the difference of the temperature at the temperature at standard set-up place and diaphragm gas meter place is no more than 1 DEG C;
B, name a person for a particular job a certain amount of gas successively by standard set-up and diaphragm gas meter at the different flow of tested diaphragm gas meter respectively, measure the actual volume value of gas at standard set-up place, obtain the metering numerical value of gas volume at diaphragm gas meter place, calculate the error of indication of single diaphragm gas meter at each flow point by the actual volume value of gas and the metering numerical value of diaphragm gas meter; Each flow point at diaphragm gas meter all calculates once the mean value of all diaphragm gas meters in this flow point error of indication, obtaining each flow point place has the average error of indication of diaphragm gas meter, the average error of indication by all diaphragm gas meters at each flow point, obtains the graph of errors of diaphragm gas meter; Described graph of errors refers to the diaphragm gas meter continuous curve that the corresponding average error of indication forms in coordinate system in the time of different flow point;
C, in the time of the tested complete different running-in amount of diaphragm gas meter running-in, repeating step B obtains diaphragm gas meter in the time completing different running-in amount, single diaphragm gas meter at the error of indication of different flow point and all diaphragm gas meters in the average error of indication corresponding to each flow point place; Obtain the graph of errors of diaphragm gas meter in the time completing different running-in amount by the average error of indication;
D, by the diaphragm gas meter that obtains in step B and C at the graph of errors that completes the diaphragm gas meter after different running-in amounts, obtain the aging curve of diaphragm gas meter in the time completing different running-in amount, described aging curve refers to that diaphragm gas meter is in the time completing certain running-in amount, the line curve that on graph of errors, the average error of indication of different flow point forms in coordinate system with respect to the side-play amount of the original average error of indication of correspondence; The described original average error of indication refers to the average error of indication of the diaphragm gas meter that does not carry out running-in;
E, main control module is set on diaphragm gas meter, on described main control module, is provided with compensation of ageing module, electronic display module and power supply;
F, the graph of errors obtaining is put in the compensation of ageing module of corresponding compensating parameter typing main control module in the different running-in amounts of diaphragm gas meter and flow with aging curve, during in the complete different running-in amounts of diaphragm gas meter running-in and in different flow point, by compensation of ageing module, the stoichiometric number of diaphragm gas meter is carried out the compensation of the corresponding error of indication, make the stoichiometric number of diaphragm gas meter identical with gas actual volume; Then show by electronic display module.
Preferably, in step B, test the graph of errors employing following steps of diaphragm gas meter:
B1, the diaphragm gas meter of tested person is stabilized to the temperature of testing location constant temperature more than four hours;
B2, before test starts, the diaphragm gas meter of tested person is no less than to the test air of 50 times of revolution volumes with maximum flow operation;
B3, the flow that is respectively qmin, 3qmin, qt, 0.2qmax, 0.4qmax, 0.7qmax and qmax at the flow of diaphragm gas meter are named a person for a particular job the air stream of a certain amount of volume that measures actual volume through the diaphragm gas meter of tested person, record the volume that the counter of diaphragm gas meter shows; Each diaphragm gas meter carries out respectively 6 times at different flow point, and guarantees each test traffic difference, does not allow to carry out follow-on test at same traffic point with identical total flow; The temperature of described air is identical with the temperature of testing location; Wherein qmin represents minimum flow, and qt represents rated flow, and qmax represents maximum flow;
B4, the mean value that calculates respectively 6 test results of each flow point obtain the error of indication of each flow point; The mean value of all diaphragm gas meters in the error of indication of same flow point is calculated respectively at each flow point place at tested diaphragm gas meter, obtain the average error of indication corresponding to the each flow point of all diaphragm gas meters place, obtain the graph of errors of diaphragm gas meter by the average error of indication.
Preferably, in described step B, calculating the error of indication adopts following formula to calculate:
Figure BDA0000491981390000041
In formula: the error of indication of E-single measurement, unit is %; V mthe indicating value of-diaphragm gas meter, unit is dm 3; V ref-by the gas actual value of diaphragm gas meter, unit is dm 3;
Measure the entrance point of diaphragm gas meter and temperature, the pressure at standard set-up place, carry out temperature, pressure correction by following formula; in formula: V sthe indicating value of-standard set-up, unit is dm 3; P sathe absolute pressure at-standard set-up place, unit is Pa; T sathe thermodynamic temperature at-standard set-up place, unit is K; P mathe absolute pressure of-diaphragm gas meter entrance point, unit is Pa; T mathe thermodynamic temperature of-diaphragm gas meter entrance point, unit is K.
Preferably, adopt the method for randomly drawing choosing at random tested diaphragm gas meter described in steps A, random number produces by methods such as the table of random numbers, dice or playing card.
Preferably, the proving installation described in steps A comprises compressed air source unit, standard set-up, flow control valve; Described compressed air source unit, standard set-up, diaphragm gas meter in turn pipe connect, and the outlet of diaphragm gas meter is provided with flow control valve.
Further, between described diaphragm gas meter and main control module, be provided with temperature sensor, pressure transducer, collection transport module and valve, on main control module, be provided with the intelligent objects such as wireless remote transmission module, amount of money pre-payment/amount of money payment module, two interface data storage interactive module, electronic seal impression block.
The invention has the beneficial effects as follows: the measuring accuracy control method that the invention provides a kind of diaphragm gas meter long-time running, common diaphragm gas meter adopts mechanical mechanism to count gas volume, in long-term use procedure, diaphragm gas meter becomes large because mechanical wear makes the reading generation negative value error of diaphragm gas meter and error, therefore causing cannot accurate recording gas quantity, the transportation difference rate of combustion gas is larger, thereby causes economic loss; After adopting the method can guarantee the diaphragm gas meter use long period, reading is accurate, reduces transportation difference rate, extends the serviceable life of diaphragm gas meter, has reduced the use cost of diaphragm gas meter, has avoided changing the waste that diaphragm gas meter causes.
Brief description of the drawings
Fig. 1 is diaphragm gas meter illustrative view of functional configuration in the embodiment of the present invention;
Fig. 2 is proving installation structural representation in the embodiment of the present invention;
Fig. 3 is the error curve diagram of the embodiment of the present invention;
Fig. 4 is the aging curve figure of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
The measuring accuracy control method of diaphragm gas meter long-time running, comprises the following steps:
A, the diaphragm gas meter 3 of sizing batch production through the error in dipping test of dispatching from the factory laggard enter in the product of storehouse, choose at random one group as tested diaphragm gas meter 3; Select the testing location of test diaphragm gas meter 3 and be ready to proving installation, described proving installation comprises compressed air source unit 1 and standard set-up 2; The environment of testing location must meet the regulation of JJG577-2012 standard completely; Be that atmospheric pressure is 86～106kPa, temperature is 20 ± 2 DEG C, and relative humidity is 45%～75%, and the difference of the temperature at the temperature at standard set-up place and diaphragm gas meter place is no more than 1 DEG C;
B, name a person for a particular job a certain amount of gas successively by standard set-up 2 and diaphragm gas meter 3 at the different flow of tested diaphragm gas meter 3 respectively, measure the actual volume value of gas at standard set-up 2 places, obtain the metering numerical value of gas volume at diaphragm gas meter 3 places, calculate the error of indication of single diaphragm gas meter 3 at each flow point by the actual volume value of gas and the metering numerical value of diaphragm gas meter 3; All calculate once the mean value of all diaphragm gas meters 3 in this flow point error of indication at each flow point of diaphragm gas meter 3, obtaining each flow point place has the average error of indication of diaphragm gas meter 3, the average error of indication by all diaphragm gas meters 3 at each flow point, obtains the graph of errors of diaphragm gas meter 3; Described graph of errors refers to diaphragm gas meter 3 continuous curve that the corresponding average error of indication forms in coordinate system in the time of different flow point;
C, in the time of the complete different running-in amount of tested diaphragm gas meter 3 running-in, repeating step B obtains diaphragm gas meter 3 in the time completing different running-in amount, single diaphragm gas meter 3 at the error of indication of different flow point and all diaphragm gas meters 3 in the average error of indication corresponding to each flow point place; Obtain the graph of errors of diaphragm gas meter 3 in the time completing different running-in amount by the average error of indication;
D, by the diaphragm gas meter 3 that obtains in step B and C at the graph of errors that completes the diaphragm gas meter 3 after different running-in amounts, obtain the aging curve of diaphragm gas meter 3 in the time completing different running-in amount, described aging curve refers to that diaphragm gas meter 3 is in the time completing certain running-in amount, the line curve that on graph of errors, the average error of indication of different flow point forms in coordinate system with respect to the side-play amount of the original average error of indication of correspondence; The described original average error of indication refers to the average error of indication of the diaphragm gas meter 3 that does not carry out running-in;
E, on diaphragm gas meter 3, main control module is set, on described main control module, is provided with compensation of ageing module, electronic display module and power supply;
F, the graph of errors obtaining and aging curve are put in the compensation of ageing module of corresponding compensating parameter typing main control module in the different running-in amounts of diaphragm gas meter 3 and flow, during in the diaphragm gas meter complete different running-in amounts of 3 running-in and in different flow point, by compensation of ageing module, the stoichiometric number of diaphragm gas meter 3 is carried out the compensation of the corresponding error of indication, make the stoichiometric number of diaphragm gas meter 3 identical with gas actual volume; Then show by electronic display module.
In steps A, the testing location of diaphragm gas meter 3 is chosen, testing location must meet the regulation of JJG577-2012 standard completely; Be that atmospheric pressure is 86～106kPa, temperature is 20 ± 2 DEG C, and relative humidity is 45%～75%, and the difference of the temperature at the temperature at standard set-up 2 places and diaphragm gas meter 3 places is no more than 1 DEG C.Thereby ensure that diaphragm gas meter 3 carries out work under standard state; Avoid the factors such as temperature and pressure to affect test result; Guarantee rationality, the accuracy measured.Select measurement mechanism simultaneously, measured the actual volume of original test gas by measurement mechanism.The diaphragm gas meter 3 of sizing batch production through the error in dipping test of dispatching from the factory laggard enter in the product of storehouse, choose at random one group as tested diaphragm gas meter 3; Choose at random and can make the tested gas meter, flow meter 3 chosen representative, the diaphragm gas meter 3 of sizing batch production ensures that the performance parameter of all diaphragm gas meters 3 is basically identical.Described standard set-up 2 refers to standard scale or the gas volume measurement mechanism that can accurately measure test gas volume.
By the temperature sensor on diaphragm gas meter 3, pressure transducer, temperature and pressure parameter is delivered to main control module 1, compensation by main control module 1 to temperature and pressure parameter, the use state no matter guarantee diaphragm gas meter 3 is placed on diaphragm gas meter 3 in extraneous any environment is all the time under standard state.Described diaphragm gas meter 3 carries out running-in and refers to that diaphragm gas meter 3 measures the gas volume through diaphragm gas meter 3.
In step B, tested diaphragm gas meter 3 at the error of indication of its each different flow point and all diaphragm gas meters 3 in the average error of indication corresponding to each flow point place; Show the graph of errors that can obtain diaphragm gas meter 3 by the average error of indication.Taking flow point as X coordinate, the average error of indication is Y coordinate, can obtain the graph of errors of diaphragm gas meter 3 in plane coordinate system by trace-point method.The described error of indication refers to that the metering numerical value of test gas deducts the percentage divided by actual volume value after actual volume value.Minimum throughput when error of indication test should be able to meet the requirement of accurate measurement, recommendation is no less than 200 times of diaphragm gas meter 3 minimum division values, and be generally not less than lower 1 minute corresponding volume of calibrating flow, make as far as possible diaphragm gas meter 3 minimum bit character wheels rotate one and enclose or a few, to reduce periodically variable impact.To the calibrating of lower-capacity point, under the prerequisite that can meet accurate measurement, can suitably reduce throughput.
In step C, the diaphragm gas meter 3 that has completed different running-in amounts is carried out to the test of the error of indication, obtain the graph of errors of diaphragm gas meter 3 after the complete different running-in amounts of running-in by the error of indication, make the whole error of indication continuous.Described running-in amount refers to from diaphragm gas meter 3 countings, by the total amount of diaphragm gas meter 3 gas volumes.
In step D, according to all tested diaphragm gas meter 3 obtaining in step B and step C, the graph of errors in the time completing different running-in amount obtains the aging curve of diaphragm gas meter 3 in the time of the complete different running-in amount of running-in.Aging curve by diaphragm gas meter 3 when the complete different running-in amount of running-in can carry out mathematical modeling to it, finds the relation between the aging curve of diaphragm gas meter 3 under each running-in amount state.Make diaphragm gas meter 3 under each running-in amount state, can find an aging curve for correspondence with it.Taking flow point as X coordinate, taking the average error of indication of different flow point on graph of errors with respect to the side-play amount of the original average error of indication of correspondence as Y coordinate, in plane coordinate system, obtain the aging curve of diaphragm gas meter 3.Described aging curve refers to that diaphragm gas meter 3 is in the time completing certain running-in amount, the line curve that on graph of errors, the average error of indication of different flow point forms in coordinate system with respect to the side-play amount of the original average error of indication of correspondence; The described original average error of indication refers to the average error of indication of the diaphragm gas meter 3 that does not carry out running-in.Be that point on aging curve is illustrated in this average error of indication in flow point place and has increased how many with respect to the original average error of indication.The difference that on described graph of errors, the average error of indication of different flow point refers to the average error of indication of the diaphragm gas meter 3 after running-in at any first-class amount point place and dispatches from the factory between the average error of indication of diaphragm gas meter 3 at this flow point place with respect to the side-play amount of the original average error of indication of correspondence.Described diaphragm gas meter 3 carries out running-in and refers to that diaphragm gas meter 3 measures the gas volume through diaphragm gas meter 3.
In step e, on diaphragm gas meter 3, main control module is set, on described main control module, is provided with compensation of ageing module, electronic display module and power supply.Be entered into compensation of ageing module by the compensating parameter that graph of errors that compensation of ageing module can obtain preceding step and aging curve carry out obtaining after data analysis is set, compensation of ageing module can play the effect of auto-compensation and memory compensation parameter.
In step F, the aging curve that obtains in step B and step C obtaining in graph of errors and step D can be obtained to the different running-in amounts of diaphragm gas meter 3 by mathematical operation and flow is put corresponding compensating parameter.This compensating parameter is entered in main control module, while utilizing main control module on diaphragm gas meter to the complete certain running-in amount of diaphragm gas meter 3 running-in, carry out the real-Time Compensation of the error of indication at the reading of corresponding flow point, avoided the reading error of diaphragm gas meter 3 due to long appearance service time.The compensating parameter that aging curve and graph of errors obtain due to what be entered into main control module in E step, therefore in the time that main control module compensates the reading of diaphragm gas meter 3, membrane type can carry out successional compensation in different running-in amounts and flow point to gas meter, flow meter 3, is not running-in amount and the flow point of fixing several particular points are compensated.Therefore can make diaphragm gas meter 3 work continuously, reading is accurate.Described compensating parameter refers to the compensating error at diaphragm gas meter 3 stoichiometric number under free position calculating according to graph of errors and aging curve.
Traditional common diaphragm gas meter 3 adopts mechanical mechanism to count gas volume, in long-term use procedure, diaphragm gas meter 3 becomes large because mechanical wear makes the reading generation negative value error of diaphragm gas meter and error, therefore causes causing economic loss by accurate recording gas quantity.The measuring accuracy control method of above-mentioned diaphragm gas meter long-time running, by the error of indication to same model diaphragm gas meter 3 and the measurement of ageing parameter, finally obtains graph of errors and aging curve.The compensating parameter that graph of errors and aging curve are obtained is entered in the main control module arranging on diaphragm gas meter 3, reading while diaphragm gas meter 3 being exported to gas with corresponding flow point in use for some time by main control module carries out the compensation of the error of indication, thereby make the stoichiometric number of gas precisely, reduced transportation difference rate.Ensured diaphragm gas meter 3 use the long period after reading accurate, extend serviceable life of diaphragm gas meter 3, reduced the use cost of diaphragm gas meter 3, avoided changing the waste that diaphragm gas meter 3 causes.
The graph of errors of test diaphragm gas meter 3 can adopt plurality of step, only need meet graph of errors and be diaphragm gas meter 3 be arranged in standard environment work test and obtain.In order to make testing procedure simple, easy to operate.The graph of errors of testing diaphragm gas meter 3 described in step B adopts following steps:
B1, the diaphragm gas meter of tested person 3 is stabilized to the temperature of testing location constant temperature more than four hours;
B2, before test starts, the diaphragm gas meter of tested person 3 is no less than to the test air of 50 times of revolution volumes with maximum flow operation;
B3, be respectively the flow point of qmin, 3qmin, qt, 0.2qmax, 0.4qmax, 0.7qmax and qmax at the flow of diaphragm gas meter 3, diaphragm gas meter 3 by the air stream of a certain amount of volume through tested person, records the volume of the counter demonstration of diaphragm gas meter 3; Each diaphragm gas meter 3 carries out respectively 6 times at different flow point, and guarantees each test traffic difference, does not allow to carry out follow-on test at same traffic point with identical total flow; The temperature of described air is identical with the temperature of testing location; Wherein qmin represents minimum flow, and qt represents rated flow, and qmax represents maximum flow;
B4, the mean value that calculates respectively 6 test results of each flow point obtain the error of indication of each flow point; The error of indication mean value of all diaphragm gas meters 3 at same flow point is calculated respectively at each flow point place at tested diaphragm gas meter 3, obtain the average error of indication corresponding to the each flow point of all diaphragm gas meters 3 place, obtain the graph of errors of diaphragm gas meter 3 by the average error of indication.
Tested diaphragm gas meter 3 is stabilized to the temperature of testing location in step B1, and constant temperature is more than four hours; Thereby when having avoided passing into gas in diaphragm gas meter 3 and testing, the volume of gas can change due to the variation of temperature; Guarantee the accuracy of test.
In step B2, the diaphragm gas meter 3 of tested person is no less than the test air of 50 times of revolution volumes with maximum flow qmax operation; Be to be in order to ensure the diaphragm gas meter 3 of choosing the diaphragm gas meter 3 that can realize normal work, do not have useless table, affect measurement result.Described revolution volume is that gas meter measuring room completes the gas volume that a working cycle is discharged.
In step B3, chosen 7 flow points the graph of errors of diaphragm gas meter 3 is measured, flow point is 7 flow points common under diaphragm gas meter 3 duties while being qmin, 3qmin, qt, 0.2qmax, 0.4qmax, 0.7qmax and qmax.Choose special working point and test the number that can simplify test traffic point, obtain having the regular representational error of indication simultaneously, thereby obtain graph of errors, reduced workload, improved work efficiency.Carry out error of indication test with the air at testing location temperature simultaneously; Ensure the unification of the calculating standard of the volume of air.Because gas volume can change along with the variation of temperature and pressure.Therefore carry out error of indication test with the air at testing location temperature and avoided the volume of air to change in the process of test, ensure the accuracy of test.Adopt air environmental protection simultaneously, easily obtain.
In step B4, the average error of indication corresponding to the each flow point of all diaphragm gas meters 3 place calculated, then obtained the graph of errors of diaphragm gas meter 3.Because being calculates error of indication value of averaging of all tested diaphragm gas meters 3, the graph of errors that therefore makes test obtain is representative, has avoided the contingency occurring in test, has improved measuring accuracy.
In step B3 and B4, owing to carrying out 6 tests at each flow point, then calculate the mean value of the error of indication of testing for 6 times as the error of indication of corresponding flow point, avoided the contingency in test process.
Graph of errors can obtain out each diaphragm gas meter 3 accurately and complete different running-in amount by above-mentioned steps time, testing procedure is simple simultaneously, and it is convenient to measure, and measuring accuracy is higher; The data that measure are representative.
In the process of calculating the error of indication, in described step B, calculate the error of indication and adopt following formula to calculate:
E = V m - V ref V ref × 100 %
In formula: the error of indication of E-single measurement, unit is %; V mthe indicating value of-diaphragm gas meter, unit is dm 3; V ref-by the gas actual value of diaphragm gas meter, unit is dm 3;
When calibrating, should measure the entrance point of diaphragm gas meter and temperature, the pressure at standard set-up 2 places, carry out temperature, pressure correction by following formula; V ref = Vs × P sa - T ma P ma T sa
In formula: V sthe indicating value of-standard set-up 2, the dm of unit 3; P sathe absolute pressure at-standard set-up 2 places, the Pa of unit; T sathe thermodynamic temperature at-standard set-up 2 places, unit K; P mathe absolute pressure of-diaphragm gas meter entrance point, the Pa of unit; T mathe thermodynamic temperature of-diaphragm gas meter entrance point, unit K;
In above-mentioned computing formula, consider the impact of temperature and pressure on gas volume, therefore in formula, it has been revised.Adopt above-mentioned formula to calculate and can get rid of temperature and the impact of pressure on test gas volume the error of indication, the error precision that test is obtained is higher.Because diaphragm gas meter 3 has been with temperature and pressure compensate function, directly show at the verification system software result interface of computing machine the compensation that comprises temperature, pressure, guarantee to measure the accurate of result.
In order reasonably to choose tested diaphragm gas meter 3, adopt the method for randomly drawing choosing tested diaphragm gas meter 3 described in step B, random number produces by methods such as the table of random numbers, dice or playing card.Make the tested diaphragm gas meter 3 that extracts representative by the mode of randomly drawing, the diaphragm gas meter 3 of sampling can be good at reflecting the characteristic of similar diaphragm gas meter 3.Described dice obtains random number and refers to all diaphragm gas meters 3 to be selected are divided into corresponding group of number, selects the diaphragm gas meter 3 in every group by throwing away the method for dice.Described playing card obtain random number and refer to all diaphragm gas meters 3 according to playing card number numbering, by randomly drawing playing card, then choose corresponding diaphragm gas meter 3.
Can measure the actual volume of test gas by multiple gases volume proving installation.In order to make test accurately, the proving installation described in steps A comprises: compressed air source unit 1, standard set-up 2, diaphragm gas meter 3, flow control valve 4; Described compressed air source unit 1, standard set-up 2, diaphragm gas 3 are shown pipe in turn and are connect, and the outlet of diaphragm gas meter 3 is provided with flow control valve 4.Compressed air source unit 1, standard set-up 2, diaphragm gas meter 3 can be connected on same pipeline by this device, as long as ensure that pipeline is air tight, the flow that flows through all devices is identical, has therefore ensured consistance and the accuracy measured.
In order further to improve the measuring accuracy of diaphragm gas meter 3, on diaphragm gas meter 3, main control module is set as described in Figure 1; Between described diaphragm gas meter and main control module, be provided with temperature sensor, pressure transducer, collection transport module and valve, on main control module, be provided with the intelligent objects such as wireless remote transmission module, amount of money pre-payment/amount of money payment module, two interface data storage interactive module, electronic seal impression block.Described valve refers to electric control valve.By the temperature sensor on diaphragm gas meter 3, pressure transducer, temperature and pressure parameter is delivered to main control module, compensation by main control module to temperature and pressure parameter, the metering numerical value no matter guarantee diaphragm gas meter 3 is placed on diaphragm gas meter 3 in extraneous any environment is identical with the metering numerical value of standard state all the time; Improve the measuring accuracy of diaphragm gas meter 3.Pre paid functionality module or wireless remote transmission module are housed on main control module, become very easily the various Intelligent diaphragm gas meters such as pre-payment or remote transmission intelligent diaphragm gas meter.
Embodiment mono-
The diaphragm gas meter 3 of same type to be chosen to 100 diaphragm gas meters 3 at random and move simulation test, to choose 100 diaphragm gas meters 3 and be the result that diaphragm gas meter in order ensure to select as far as possible and test obtain representative.
1, choosing of testing location, the parameters such as the difference of atmospheric pressure, temperature, relative humidity, the temperature at standard set-up 2 places and the temperature at diaphragm gas meter 3 places of the testing location of choosing and JJG577-2012 standard be compared as follows table:
Figure BDA0000491981390000101
The testing location of selecting as seen from the above table meets JJG577-2012 standard.Thereby complete test choosing of diaphragm gas meter 3 and choosing of testing location.
Be ready to proving installation, proving installation comprises as shown in Figure 2 simultaneously: compressed air source unit 1, standard set-up 2, flow control valve 4; Described compressed air source unit 1, standard set-up 2, diaphragm gas meter 3 in turn pipe connect, and the outlet of diaphragm gas meter 3 is provided with flow control valve 4.
2, the graph of errors of test diaphragm gas meter
First the diaphragm gas meter of tested person 3 is stabilized to the temperature of test environment constant temperature more than 4 hours, carries out error of indication test with the air at testing location temperature; Then before test starts, the diaphragm gas meter 3 of tested person is no less than the test air of 50 times of revolution volumes with maximum flow operation; Then the flow that is respectively qmin, 3qmin, qt, 0.2qmax, 0.4qmax, 0.7qmax and qmax at the flow of diaphragm gas meter 3 is named a person for a particular job the air stream of a certain amount of volume that measures actual volume through the diaphragm gas meter 3 of tested person, records the volume that the counter of diaphragm gas meter 3 shows; Each diaphragm gas meter 3 carries out 6 times at different flow point, and guarantees each test traffic difference, does not allow to carry out follow-on test at same traffic point with identical total flow; The temperature of described air is identical with the temperature of testing location; Wherein qmin represents minimum flow, and qt represents rated flow, and qmax represents maximum flow;
The mean value that finally calculates respectively 6 test results of each flow point obtains the error of indication of each flow point; The mean value of all diaphragm gas meters 3 in the error of indication of same flow point is calculated respectively at each flow point place at tested diaphragm gas meter 3, obtain the average error of indication corresponding to the each flow point of all diaphragm gas meters 3 place, obtain the graph of errors of diaphragm gas meter 3 by the average error of indication.
Under classify the computing formula of the error of indication as,
Figure BDA0000491981390000111
In formula: the error of indication of E-single measurement, unit is %; V mthe indicating value of-diaphragm gas meter, unit is dm 3; V ref-by the gas actual value of diaphragm gas meter, unit is dm 3;
Measure the entrance point of diaphragm gas meter and temperature, the pressure at standard set-up 2 places, carry out temperature, pressure correction by following formula; V ref = Vs × P sa - T ma P ma T sa
In formula: V sthe indicating value of-standard set-up 2, unit is dm 3; P sathe absolute pressure at-standard set-up 2 places, unit is Pa; T sathe thermodynamic temperature at-standard set-up 2 places, unit is K; P mathe absolute pressure of-diaphragm gas meter entrance point, unit is Pa; T mathe thermodynamic temperature of-diaphragm gas meter entrance point, unit is K.
The step of the graph of errors of the diaphragm gas meter 3 by above-mentioned test obtains the error statistics data of each group diaphragm gas meter after the certain running-in amount of diaphragm gas meter running-in 6 months every months.
Shown in following list lattice:
Data in table, have carried out to the error of indication of diaphragm gas meter 3 at qmax, 0.7qmax, 0.4qmax, 0.2qmax, qt, 3qmin and the qmin of diaphragm gas meter 3 each flow point respectively that record obtains.The error of indication of the each flow point in following form is illustrated in this flow point place and tests through 6 times the mean value that obtains the error of indication.The average error of indication refers to the mean value of all tested diaphragm gas meters 3 in the error of indication at same flow point place.The difference of the diaphragm gas meter 3 that ageing parameter (ξ) refers to the certain running-in amount of running-in between the average error of indication and the corresponding original average error of indication at same flow point place.
The described original error of indication refers to error of indication when diaphragm gas meter 3 has just dispatched from the factory.
Table 1 is the diaphragm gas meter error statistics table that dispatches from the factory of running-in not
Figure BDA0000491981390000113
Continued 1
21304006 -0.40 -0.27 -0.18 0.27 0.40 0.10 -0.92
21304007 -0.49 -0.33 -0.22 0.39 0.58 -0.60 -1.19
21304008 0.13 -0.09 0.06 0.35 0.52 -0.60 -1.11
21304009 -0.28 -0.19 -0.12 0.27 0.40 -0.92 -0.73
21304010 -0.66 -0.44 -0.29 0.11 0.16 -0.62 -0.70
21304011 0.02 -0.01 0.01 0.34 0.51 -0.41 -0.30
21304012 -0.60 -0.40 -0.27 0.19 0.28 -0.40 -0.20
21304013 -0.24 -0.16 -0.11 0.20 0.30 -0.21 -0.83
21304014 -0.41 -0.27 -0.18 0.19 0.29 -0.10 -0.52
21304015 -0.43 -0.29 -0.19 0.31 0.47 0.10 -0.79
21304016 -0.25 -0.17 -0.11 0.39 0.58 1.41 -0.71
21304017 -0.03 -0.02 -0.01 0.29 0.43 -0.10 -0.49
21304018 0.28 0.19 0.12 0.16 0.24 -0.10 -0.49
21304019 -0.18 -0.12 -0.08 0.27 0.40 0.40 -0.31
21304020 0.01 0.01 0.00 0.29 0.44 0.50 -0.30
21304021 -0.31 -0.21 -0.14 0.22 0.33 -0.39 -0.19
21304022 -0.30 -0.20 -0.13 0.17 0.26 -0.78 0.10
21304023 0.00 0.00 0.00 0.18 0.27 -0.69 -0.91
21304024 -0.20 -0.13 -0.09 0.11 0.17 -0.41 -0.87
21304025 -0.20 -0.13 -0.09 0.14 0.21 -0.10 -0.87
21304026 -0.13 -0.09 -0.06 0.20 0.30 -0.51 -0.49
21304027 -0.34 -0.23 -0.15 0.25 0.37 -0.49 -0.41
21304028 -0.30 -0.20 -0.13 0.23 0.34 -0.40 -0.40
21304029 0.20 0.13 -0.09 0.19 0.28 0.19 -0.39
21304030 -0.46 -0.31 -0.20 0.17 0.25 -0.10 -0.20
21304031 -0.45 -0.30 -0.20 0.37 0.56 -0.10 -1.14
21304032 -0.35 -0.23 -0.16 0.27 0.40 -0.10 -0.97
21304033 -0.47 -0.31 -0.21 0.20 0.30 0.10 -0.78
21304034 -0.48 -0.32 -0.21 0.16 0.24 -0.72 -0.50
21304035 -0.48 -0.32 0.21 0.15 0.23 -1.36 -0.10
21304036 -0.64 -0.43 -0.28 0.15 0.23 -0.20 -0.50
21304037 -0.64 -0.43 -0.28 0.25 0.38 0.10 -0.41
21304038 -0.50 -0.33 -0.22 0.15 0.23 0.10 -0.10
21304039 -0.25 -0.17 -0.11 0.27 0.40 0.40 -0.52
21304040 -0.91 -0.61 -0.40 0.32 0.48 0.52 -0.52
21304041 -0.34 -0.23 -0.15 0.27 0.40 -1.41 -0.10
21304042 -0.25 -0.17 -0.11 0.14 0.21 0.21 0.21
21304043 -0.58 -0.39 -0.26 0.21 0.32 -0.62 0.30
21304044 -0.14 -0.09 -0.06 0.27 0.40 0.31 -0.81
21304045 -0.70 -0.47 -0.31 0.03 0.04 0.40 -0.68
21304046 -0.79 -0.53 -0.35 0.06 0.09 -0.40 -0.60
21304047 -0.18 -0.12 -0.08 0.17 0.26 -0.20 -0.51
21304048 0.06 0.04 0.03 0.21 0.31 1.13 -0.51
21304049 -0.44 -0.29 -0.20 0.19 0.28 0.10 0.10
21304050 0.16 -0.11 0.07 0.08 0.12 0.29 0.10
21304051 -0.22 -0.15 -0.10 0.15 0.23 0.19 -1.13
21304052 -0.27 -0.18 -0.12 0.00 0.00 -0.52 -0.62
21304053 -0.03 -0.02 -0.01 0.25 0.37 -0.40 -0.19
21304054 -0.12 -8.00 -0.05 0.27 0.40 -0.31 -0.59
21304055 -0.83 -0.55 -0.37 0.15 0.23 0.92 -0.49
Continued 1
21304056 -1.06 -0.71 -0.47 0.09 0.13 1.16 -0.39
21304057 -0.63 -0.42 -0.28 0.17 0.26 -0.71 -0.39
21304058 -0.52 -0.35 -0.23 0.18 0.27 -0.20 -0.83
21304059 -0.30 -0.20 -0.13 0.11 0.16 0.10 -0.51
21304060 -1.01 -0.37 -0.45 0.23 0.34 1.30 -0.71
21304061 -0.27 -0.18 -0.12 0.25 0.37 -0.20 -0.29
21304062 0.10 -0.07 0.04 0.10 0.15 0.20 -0.20
21304063 -0.35 -0.23 -0.16 0.13 0.20 0.10 0.30
21304064 0.24 0.16 0.11 0.25 0.37 0.40 0.39
21304065 -0.26 -0.17 -0.12 0.22 0.33 1.36 -0.97
21304066 -0.29 -0.19 -0.13 0.12 0.18 0.60 -0.72
21304067 -0.14 -0.09 -0.06 0.17 0.25 0.78 -0.59
21304068 -0.50 -0.33 -0.22 0.17 0.25 1.19 -0.51
21304069 -0.22 -0.15 -0.10 0.25 0.37 0.39 -0.49
21304070 -0.10 -0.07 -0.04 0.24 0.36 1.26 -0.39
21304071 -1.05 -0.70 -0.47 0.15 0.23 0.20 0.21
21304072 -0.80 -0.53 -0.36 0.25 0.37 0.41 -0.97
21304073 -0.74 -0.49 -0.33 0.23 0.34 0.61 -0.78
21304074 -0.84 -0.56 -0.37 0.29 0.43 -0.71 -0.52
21304075 -0.30 -0.20 -0.13 0.20 0.30 -0.29 -0.50
21304076 -1.03 -0.69 -0.46 0.16 0.24 0.10 -0.42
21304077 -0.52 -0.35 -0.23 0.27 0.40 0.20 -0.29
21304078 -0.30 -0.20 -0.13 0.27 0.40 -0.87 0.41
21304079 -0.18 -0.12 -0.08 0.21 0.31 -0.61 -0.91
21304080 -0.49 -0.33 -0.22 0.17 0.26 -0.29 -0.89
21304081 0.05 0.03 0.02 0.20 0.30 -0.59 -0.80
21304082 -0.20 -0.13 -0.09 0.01 0.01 -0.51 -0.62
21304083 0.17 0.11 0.08 0.22 0.33 0.19 -0.50
21304084 0.07 0.05 0.03 0.23 0.34 -0.59 -0.93
21304085 -0.45 -0.30 -0.20 0.11 0.16 -0.20 -0.73
21304086 -0.46 -0.31 -0.20 0.25 0.37 -0.10 -0.52
21304087 -0.10 -0.07 -0.04 0.24 0.36 -0.10 -0.88
21304088 -0.15 -0.10 -0.07 0.19 0.29 -0.10 -0.21
21304089 -0.13 -0.09 -0.06 0.21 0.32 -0.41 -0.10
21304090 -1.00 -0.67 -0.44 0.05 0.07 -0.73 -1.19
21304091 -0.17 -0.11 -0.08 0.11 0.16 -0.51 -0.50
21304092 -0.60 -0.40 -0.27 0.19 0.28 0.20 -0.39
21304093 -0.48 -0.32 -0.21 0.15 0.23 -0.71 -0.20
21304094 -0.33 -0.22 -0.15 0.14 0.21 -0.70 0.31
21304095 -0.50 -0.33 -0.22 0.19 0.29 -0.61 -0.29
21304096 -0.30 -0.20 -0.13 -0.02 -0.03 -0.51 -0.10
21304097 -0.36 -0.24 -0.16 0.38 0.57 -0.79 0.50
21304098 -0.53 -0.35 -0.24 0.01 0.02 -0.49 -1.00
21304099 -0.46 -0.31 -0.20 0.07 0.10 -0.21 -0.82
21304100 -0.03 -0.02 -0.01 0.27 0.40 -0.94 -0.42
The average error of indication -0.34 -0.31 -0.15 0.20 0.29 -0.10 -0.49
Ageing parameter ? ? ? ? ? ? ?
Table 2, diaphragm gas meter running-in amount running-in 400m 3rear test result
Figure BDA0000491981390000141
Continued 2
21304048 -0.24 -0.26 -0.27 -0.11 -0.02 1.00 -1.05
21304049 -0.64 -0.50 -0.42 -0.07 0.01 -0.21 -0.21
21304050 -0.10 -0.34 -0.18 -0.17 -0.14 0.03 -0.21
21304051 -0.40 -0.33 -0.29 -0.06 0.01 -0.04 -1.69
21304052 -0.52 -0.44 -0.39 -0.28 -0.28 -1.04 -1.16
21304053 -0.26 -0.25 -0.24 -0.01 0.10 -0.83 -0.56
21304054 -0.33 -0.33 -0.27 0.02 0.14 -0.70 -1.05
21304055 -0.95 -0.70 -0.54 -0.07 0.00 0.86 -0.9
21304056 -1.24 -0.93 -0.71 -0.21 -0.17 1.00 -0.89
21304057 -0.79 -0.60 -0.48 -0.07 0.01 -1.20 -0.8
21304058 -0.69 -0.54 -0.43 -0.06 0.02 -0.56 -1.35
21304059 -0.50 -0.41 -0.34 -0.13 -0.08 -0.19 -0.95
21304060 -1.20 -0.62 -0.69 -0.08 0.02 1.23 -1.29
21304061 -0.53 -0.45 -0.40 -0.06 0.05 -0.65 -0.76
21304062 -0.15 -0.31 -0.21 -0.15 -0.11 0.09 -0.59
21304063 -0.53 -0.45 -0.39 -0.13 -0.06 -0.21 0.04
21304064 -0.03 -0.10 -0.14 -0.02 0.09 0.16 0.15
21304065 -0.50 -0.42 -0.38 -0.07 0.03 1.33 -1.59
21304066 -0.53 -0.44 -0.39 -0.16 -0.11 0.38 -1.28
21304067 -0.40 -0.35 -0.32 -0.12 -0.05 0.60 -1.11
21304068 -0.75 -0.60 -0.50 -0.15 -0.08 1.06 -1.06
21304069 -0.42 -0.36 -0.32 0.00 0.11 0.18 -0.93
21304070 -0.40 -0.37 -0.34 -0.09 0.02 1.15 -0.91
21304071 -1.24 -0.93 -0.72 -0.16 -0.09 -0.16 -0.15
21304072 -0.97 -0.73 -0.58 -0.03 0.08 0.16 -1.56
21304073 -0.92 -0.69 -0.55 -0.05 0.05 0.41 -1.33
21304074 -0.96 -0.71 -0.54 0.05 0.18 -1.18 -0.94
21304075 -0.48 -0.39 -0.32 -0.03 0.06 -0.65 -0.91
21304076 -1.20 -0.89 -0.68 -0.13 -0.05 -0.25 -0.9
21304077 -0.68 -0.53 -0.42 0.03 0.14 -0.05 -0.66
21304078 -0.49 -0.40 -0.33 0.03 0.14 1.39 0.21
21304079 -0.46 -0.41 -0.37 -0.11 -0.02 -1.18 -1.55
21304080 -0.74 -0.59 -0.50 -0.14 -0.06 -0.78 -1.53
21304081 -0.20 -0.22 -0.23 -0.06 0.03 -1.08 -1.34
21304082 -0.39 -0.32 -0.29 -0.20 -0.20 -0.93 -1.06
21304083 -0.05 -0.11 -0.14 -0.01 0.09 -0.05 -0.91
21304084 -0.22 -0.23 -0.25 -0.07 0.03 -1.13 -1.55
21304085 -0.64 -0.50 -0.41 -0.14 -0.09 -0.58 -1.24
21304086 -0.68 -0.55 -0.45 -0.05 0.06 -0.50 -1.03
21304087 -0.36 -0.33 -0.31 -0.05 0.05 -0.50 -1.48
21304088 -0.43 -0.39 -0.36 -0.13 -0.04 -0.54 -0.68
21304089 -0.41 -0.38 -0.35 -0.11 -0.01 -0.93 -0.54
21304090 -1.15 -0.86 -0.65 -0.21 -0.19 -1.26 -1.84
21304091 -0.41 -0.35 -0.32 -0.15 -0.11 -0.99 -0.98
21304092 -0.79 -0.61 -0.50 -0.08 0.00 -0.10 -0.84
21304093 -0.70 -0.56 -0.46 -0.14 -0.06 -1.26 -0.63
21304094 -0.57 -0.47 -0.41 -0.14 -0.08 -1.25 0.01
21304095 -0.72 -0.57 -0.47 -0.10 -0.01 -1.14 -0.74
21304096 -0.54 -0.45 -0.39 -0.29 -0.30 -1.01 -0.5
21304097 -0.59 -0.48 -0.41 0.08 0.25 -1.36 -0.26
Continued 2
21304098 -0.69 -0.53 -0.43 -0.21 -0.20 -0.91 -1.55
21304099 -0.71 -0.58 -0.48 -0.23 -0.21 -0.68 -1.44
21304100 -0.32 -0.32 -0.31 -0.05 -0.06 -1.59 -0.94
The average error of indication -0.57 -0.47 -0.40 -0.08 0.00 -0.49 -0.98
Ageing parameter -0.23 -0.16 -0.25 -0.28 -0.29 -0.38 -0.49
Table 3 diaphragm gas meter running-in amount running-in 1000m 3rear test result
Figure BDA0000491981390000161
Continued 3
21304041 -0.68 -0.58 -0.50 -0.13 -0.01 -2.28 -0.64
21304042 -0.68 -0.61 -0.56 -0.33 -0.27 -0.38 -0.38
21304043 -0.98 -0.81 -0.69 -0.27 -0.17 -1.41 -0.26
21304044 -0.56 -0.51 -0.49 -0.19 -0.07 -0.21 -1.61
21304045 -1.05 -0.85 -0.70 -0.40 -0.39 -0.09 -1.44
21304046 -1.09 -0.86 -0.69 -0.32 -0.30 -1.03 -1.28
21304047 -0.53 -0.48 -0.44 -0.22 -0.14 -0.76 -1.15
21304048 -0.41 -0.42 -0.43 -0.27 -0.18 0.78 -1.28
21304049 -0.79 -0.66 -0.58 -0.23 -0.14 -0.43 -0.43
21304050 -0.18 -0.42 -0.29 -0.25 -0.22 -0.09 -0.33
21304051 -0.55 -0.49 -0.44 -0.22 -0.14 -0.25 -1.90
21304052 -0.68 -0.59 -0.54 -0.43 -0.43 -1.25 -1.38
21304053 -0.41 -0.40 -0.39 -0.15 -0.05 -1.03 -0.76
21304054 -0.44 -0.41 -0.38 -0.09 0.03 -0.85 -1.20
21304055 -1.18 -0.93 -0.77 -0.30 -0.23 0.55 -1.21
21304056 -1.41 -1.10 -0.88 -0.38 -0.34 -0.81 -1.13
21304057 -0.98 -0.79 -0.67 -0.26 -0.18 -1.46 -0.06
21304058 -0.83 -0.68 -0.57 -0.20 -0.12 -0.75 -1.54
21304059 -0.63 -0.54 -0.48 -0.26 -0.22 -0.38 -1.14
21304060 -1.37 -0.79 -0.86 -0.25 -0.15 0.99 -1.53
21304061 -0.68 -0.60 -0.55 -0.22 -0.11 -0.86 -0.98
21304062 -0.30 -0.45 -0.35 -0.30 -0.25 -0.29 -0.79
21304063 -0.67 -0.56 -0.50 -0.23 -0.17 -0.36 -0.11
21304064 -0.25 -0.32 -0.37 -0.24 -0.14 -0.15 -0.16
21304065 -0.61 -0.53 -0.49 -0.18 -0.08 1.18 -1.74
21304066 -0.63 -0.54 -0.49 -0.26 -0.21 0.24 -1.41
21304067 -0.45 -0.41 -0.38 -0.17 -0.10 0.53 -1.19
21304068 -0.90 -0.75 -0.65 -0.30 -0.23 0.86 -1.26
21304069 -0.60 -0.54 -0.50 -0.18 -0.07 -0.08 -1.18
21304070 -0.46 -0.43 -0.41 -0.15 -0.05 1.06 -1.00
21304071 -1.31 -0.99 -0.78 -0.23 -0.15 -0.25 -0.24
21304072 -1.08 -0.84 -0.68 -0.14 -0.03 0.01 -1.71
21304073 -1.04 -0.82 -0.68 -0.17 -0.07 0.24 -1.50
21304074 -1.09 -0.87 -0.67 -0.07 0.05 -1.35 -1.11
21304075 -0.74 -0.65 -0.59 -0.29 -0.20 -1.01 -1.28
21304076 -1.31 -1.00 -0.79 -0.23 -0.16 -0.40 -1.05
21304077 -0.89 -0.74 -0.63 -0.18 -0.06 -0.34 -0.95
21304078 -0.69 -0.60 -0.54 -0.18 -0.06 -1.68 -0.08
21304079 -0.51 -0.46 -0.42 -0.16 -0.07 -1.25 -1.63
21304080 -0.90 -0.76 -0.66 -0.31 -0.23 -1.00 -1.75
21304081 -0.41 -0.43 -0.40 -0.28 -0.19 -1.38 -1.64
21304082 -0.64 -0.58 -0.54 -0.45 -0.45 -1.28 -1.41
21304083 -0.31 -0.36 -0.39 -0.26 -0.16 -0.40 -1.26
21304084 -0.40 -0.41 -0.43 -0.25 -0.15 -1.38 -1.80
21304085 -0.86 -0.73 -0.64 -0.36 -0.32 -0.89 -1.55
21304086 -0.83 -0.69 -0.59 -0.19 -0.08 -0.70 -1.23
21304087 -0.45 -0.42 -0.40 -0.14 -0.04 -0.63 -1.60
21304088 -0.50 -0.45 -0.42 -0.19 -0.10 -0.63 -0.76
21304089 -0.45 -0.41 -0.39 -0.14 -0.05 -0.98 -0.59
21304090 -1.34 -1.04 -0.84 -0.40 -0.38 -1.53 -2.10
Continued 3
21304091 -0.59 -0.54 -0.51 -0.34 -0.30 -1.25 -1.24
21304092 -0.94 -0.76 -0.64 -0.23 -0.14 -0.30 -1.04
21304093 -0.78 -0.64 -0.54 -0.22 -0.14 -1.38 -0.74
21304094 -0.77 -0.67 -0.60 -0.34 -0.28 -1.53 -0.26
21304095 -0.92 -0.77 -0.67 -0.30 -0.21 -1.41 -1.01
21304096 -0.69 -0.60 -0.54 -0.44 -0.45 -1.23 -0.74
21304097 -0.70 -0.59 -0.52 -0.04 0.14 -1.51 0.10
21304098 -0.81 -0.65 -0.55 -0.32 -0.32 -1.08 -1.71
21304099 -0.75 -0.61 -0.51 -0.27 -0.24 -0.73 -1.49
21304100 -0.50 -0.49 -0.48 -0.23 -0.11 -0.83 -1.18
The average error of indication -0.71 -0.61 -0.54 -0.22 -0.14 -0.70 -1.17
Ageing parameter -0.37 -0.30 -0.39 -0.42 -0.44 -0.59 -0.67
Table 4 diaphragm gas meter running-in amount running-in 2000m 3rear test result
Figure BDA0000491981390000181
continued 4
21304034 -0.99 -0.85 -0.75 -0.41 -0.34 -1.68 -1.4
21304035 -0.94 -0.79 -0.32 -0.37 -0.30 -2.40 -0.83
21304036 -1.13 -0.95 -0.81 -0.42 -0.35 -1.03 -1.4
21304037 -1.08 -0.89 -0.76 -0.28 -0.16 -0.58 -1.21
21304038 -0.95 -0.79 -0.69 -0.36 -0.29 -0.56 -0.81
21304039 -0.79 -0.72 -0.67 -0.32 -0.21 -0.29 -1.44
21304040 -1.38 -1.11 -0.92 -0.27 -0.13 -0.13 -1.43
21304041 -0.78 -0.68 -0.61 -0.23 -0.12 -2.43 -0.79
21304042 -0.78 -0.71 -0.66 -0.43 -0.37 -0.51 -0.51
21304043 -1.07 -0.90 -0.78 -0.36 -0.26 -1.54 -0.39
21304044 -0.65 -0.60 -0.58 -0.28 -0.16 -0.34 -1.74
21304045 -1.12 -0.91 -0.77 -0.46 -0.45 -0.18 -1.53
21304046 -1.20 -0.96 -0.80 -0.43 -0.41 -1.18 -1.43
21304047 -0.64 -0.59 -0.55 -0.32 -0.24 -0.91 -1.3
21304048 -0.52 -0.54 -0.55 -0.39 -0.30 0.61 -1.44
21304049 -0.95 -0.82 -0.74 -0.39 -0.31 -0.65 -0.65
21304050 -0.39 -0.63 -0.47 -0.46 -0.42 -0.38 -0.61
21304051 -0.70 -0.64 -0.59 -0.37 -0.30 -0.46 -2.11
21304052 -0.80 -0.72 -0.67 -0.56 -0.56 -1.43 -1.55
21304053 -0.59 -0.59 -0.58 -0.34 -0.23 -1.29 -1.03
21304054 -0.68 -0.64 -0.61 -0.32 -0.21 -1.18 -1.53
21304055 -1.27 -1.02 -0.86 -0.39 -0.32 0.43 -1.34
21304056 -1.52 -1.21 -0.99 -0.49 -0.45 0.66 -1.28
21304057 -1.13 -0.95 -0.82 -0.41 -0.33 -1.68 -1.28
21304058 -1.02 -0.86 -0.76 -0.39 -0.31 -1.01 -1.8
21304059 -0.82 -0.73 -0.67 -0.45 -0.41 -0.64 -1.4
21304060 -1.42 -0.85 -0.92 -0.31 -0.21 0.91 -1.6
21304061 -0.75 -0.67 -0.61 -0.28 -0.17 -0.95 -1.06
21304062 -0.49 -0.64 -0.54 -0.49 -0.44 -0.55 -1.05
21304063 -0.81 -0.70 -0.64 -0.38 -0.32 -0.56 -0.31
21304064 -0.34 -0.41 -0.46 -0.33 -0.23 -0.28 -0.29
21304065 -0.74 -0.66 -0.61 -0.31 -0.21 1.00 -1.91
21304066 -0.77 -0.68 -0.62 -0.40 -0.34 0.05 -1.6
21304067 -0.60 -0.56 -0.53 -0.32 -0.25 0.31 -1.4
21304068 -0.95 -0.80 -0.70 -0.35 -0.28 0.79 -1.34
21304069 0.69 -0.63 -0.59 -0.27 -0.16 -0.20 -1.3
21304070 -0.57 -0.54 -0.51 -0.26 -0.15 0.91 -1.15
21304071 -1.51 -1.20 -0.99 -0.43 -0.36 -0.54 -0.53
21304072 -1.25 -1.01 -0.86 -0.31 -0.20 -0.23 -1.95
21304073 -1.19 -0.96 -0.82 -0.32 -0.22 0.04 -1.7
21304074 -1.31 -1.03 -0.89 -0.30 -0.17 -1.66 -1.43
21304075 -0.83 -0.74 -0.68 -0.38 -0.29 -1.14 -1.4
21304076 -1.46 -1.15 -0.95 -0.39 -0.32 -0.61 -1.26
21304077 -1.02 -0.86 -0.76 -0.31 -0.19 -0.51 -1.13
21304078 -0.82 -0.73 -0.67 -0.31 -0.19 -1.85 -0.25
21304079 -0.61 -0.56 -0.52 -0.26 -0.17 -1.39 -1.76
21304080 -0.95 -0.80 -0.70 -0.35 -0.27 -1.06 -1.81
21304081 -0.53 -0.55 -0.56 -0.40 -0.31 -1.54 -1.8
21304082 -0.76 -0.69 -0.66 -0.57 -0.57 -1.44 -1.58
21304083 -0.42 -0.48 -0.50 -0.38 -0.28 -0.56 -1.43
Continued 4
21304084 -0.50 -0.52 -0.54 -0.36 -0.26 -1.53 -1.95
21304085 -0.96 -0.83 -0.74 -0.46 -0.41 -1.03 -1.69
21304086 -0.94 -0.80 -0.70 -0.30 -0.19 -0.85 -1.38
21304087 -0.60 -0.58 -0.55 -0.30 -0.19 -0.84 -1.81
21304088 -0.65 -0.60 -0.58 -0.34 -0.25 -0.84 -0.98
21304089 -0.59 -0.56 -0.53 -0.29 -0.19 -1.18 -0.79
21304090 -1.40 -1.11 -0.90 -0.46 -0.44 -1.61 -2.19
21304091 -0.66 -0.60 -0.58 -0.41 -0.36 -1.34 -1.33
21304092 -1.04 -0.86 -0.74 -0.32 -0.24 -0.44 -1.18
21304093 -1.00 -0.86 -0.76 -0.43 -0.36 -1.68 -1.04
21304094 -0.83 -0.73 -0.67 -0.41 -0.34 -1.61 -0.35
21304095 -0.97 -0.82 -0.72 -0.35 -0.26 -1.49 -1.09
21304096 -0.79 -0.70 -0.64 -0.54 -0.55 -1.36 -0.85
21304097 -0.87 -0.77 -0.69 -0.21 -0.04 -1.75 -0.14
21304098 -1.03 -0.86 -0.77 -0.54 -0.53 -1.38 -2.01
21304099 -0.96 -0.83 -0.73 -0.49 -0.46 -1.03 -1.79
21304100 -0.58 -0.57 -0.56 -0.31 -0.19 -1.94 -1.29
The average error of indication -0.82 -0.74 -0.66 -0.35 -0.26 -0.89 -1.35
Ageing parameter -0.48 -0.43 -0.51 -0.55 -0.56 -0.78 -0.86
Table 5 diaphragm gas meter running-in amount running-in 4000m 3rear test result
Continued 5
21304027 -0.98 -0.88 -0.81 -0.45 -0.34 -1.55 -1.45
21304028 -0.93 -0.84 -0.77 -0.45 -0.35 -1.41 -1.41
21304029 -0.45 -0.51 -0.71 -0.46 -0.38 -0.64 -1.36
21304030 -1.04 -0.91 -0.81 -0.48 -0.41 -1.00 -1.13
21304031 -1.04 -0.90 -0.81 -0.36 -0.13 -1.00 -2.3
21304032 -0.91 -0.80 -0.74 -0.35 -0.23 -0.95 -2.04
21304033 -1.02 -0.87 -0.78 -0.41 -0.32 -0.70 -1.8
21304034 -1.13 -0.99 -0.89 -0.56 -0.49 -1.88 -1.6
21304035 -1.08 -0.94 -0.46 -0.51 -0.44 -2.60 -1.03
21304036 -1.31 -1.12 -0.98 -0.59 -0.52 -1.26 -1.64
21304037 -1.22 -1.03 -0.89 -0.41 -0.30 -0.76 -1.4
21304038 -1.18 -1.03 -0.93 -0.59 -0.52 -0.89 -1.14
21304039 -0.96 -0.89 -0.84 -0.50 -0.38 -0.53 -1.68
21304040 -1.51 -1.24 -1.05 -0.41 -0.26 -0.31 -1.61
21304041 -0.92 -0.82 -0.75 -0.37 -0.25 -2.61 -0.98
21304042 -0.88 -0.81 -0.76 -0.53 -0.47 -0.65 -0.65
21304043 -1.13 -0.95 -0.84 -0.41 -0.32 -1.61 -0.46
21304044 -0.88 -0.84 -0.81 -0.51 -0.40 -0.66 -2.06
21304045 -1.24 -1.04 -0.89 -0.59 -0.58 -0.35 -1.7
21304046 -1.30 -1.06 -0.90 -0.53 -0.50 -1.31 -1.56
21304047 -0.80 -0.75 -0.71 -0.49 -0.41 -1.14 -1.53
21304048 -0.54 -0.56 -0.57 -0.41 -0.32 0.59 -1.46
21304049 -1.08 -0.95 -0.86 -0.51 -0.43 -0.83 -0.83
21304050 -0.59 -0.84 -0.68 -0.67 -0.63 -0.66 -0.9
21304051 -0.88 -0.82 -0.77 -0.55 -0.48 -0.71 -2.36
21304052 -0.91 -0.83 -0.77 -0.67 -0.67 -1.58 -1.7
21304053 -0.72 -0.71 -0.70 -0.47 -0.36 -1.46 -1.2
21304054 -0.72 -0.68 -0.66 -0.37 -0.25 -1.24 -1.59
21304055 -1.35 -1.10 -0.94 -0.47 -0.40 0.31 -1.45
21304056 -1.66 -1.34 -1.13 -0.62 -0.59 0.48 -1.46
21304057 -1.23 -1.04 -0.92 -0.54 -0.43 -1.81 -1.41
21304058 -1.05 -0.90 -0.79 -0.42 -0.34 -1.06 -1.85
21304059 -1.03 -0.94 -0.87 -0.66 -0.61 -0.93 -1.69
21304060 -1.67 -1.09 -1.16 -0.55 -0.45 0.58 -1.94
21304061 -0.94 -0.86 -0.80 -0.47 -0.36 -1.21 -1.33
21304062 -0.64 -0.79 -0.69 -0.64 -0.59 -0.76 -1.26
21304063 -0.99 -0.88 -0.82 -0.56 -0.50 -0.81 -0.56
21304064 -0.37 -0.44 -0.49 -0.36 -0.25 -0.31 -0.33
21304065 -0.93 -0.85 -0.80 -0.50 -0.39 0.74 -2.18
21304066 -0.94 -0.85 -0.79 -0.57 -0.51 -0.19 -1.84
21304067 -0.79 -0.75 -0.72 -0.51 -0.44 0.05 -1.66
21304068 -1.08 -0.93 -0.83 -0.48 -0.41 0.61 -1.51
21304069 -0.78 -0.72 -0.68 -0.36 -0.25 -0.33 -1.43
21304070 -0.75 -0.72 -0.69 -0.44 -0.33 0.66 -1.4
21304071 -1.65 -1.33 -1.13 -0.57 -0.50 -0.73 -0.71
21304072 -1.42 -1.18 -1.03 -0.48 -0.37 -0.46 -2.19
21304073 -1.31 -1.09 -0.95 -0.44 -0.34 -0.14 -1.88
21304074 -1.36 -1.11 -0.94 -0.34 -0.22 -1.73 -1.49
21304075 -1.00 -0.91 -0.85 -0.55 -0.46 -1.38 -1.64
21304076 -1.61 -1.31 -1.10 -0.54 -0.47 -0.83 -1.48
Continued 5
21304077 -1.06 -0.91 -0.80 -0.35 -0.23 -0.58 -1.19
21304078 -0.89 -0.80 -0.74 -0.38 -0.26 -1.95 -0.35
21304079 -0.88 -0.83 -0.79 -0.53 -0.44 -1.76 -2.14
21304080 -1.13 -0.98 -0.88 -0.53 -0.45 -1.31 -2.06
21304081 -0.63 -0.65 -0.66 -0.50 -0.41 -1.68 -1.94
21304082 -0.85 -0.78 -0.75 -0.66 -0.66 -1.56 -1.7
21304083 -0.49 -0.54 -0.57 -0.44 -0.34 -0.65 -1.51
21304084 -0.56 -0.58 -0.59 -0.41 -0.32 -1.60 -2.03
21304085 -1.03 -0.89 -0.80 -0.52 -0.48 -1.11 -1.78
21304086 -1.07 -0.94 -0.84 -0.43 -0.32 -1.04 -1.56
21304087 -0.74 -0.71 -0.68 -0.43 -0.32 -1.03 -2
21304088 -0.73 -0.68 -0.66 -0.42 -0.33 -0.95 -1.09
21304089 -0.71 -0.68 -0.65 -0.41 -0.31 -1.34 -0.95
21304090 -1.51 -1.22 -1.01 -0.57 -0.55 -1.76 -2.34
21304091 -0.75 -0.69 -0.67 -0.50 -0.45 -1.46 -1.45
21304092 -1.13 -0.95 -0.84 -0.42 -0.34 -0.58 -1.31
21304093 -1.15 -1.01 -0.91 -0.59 -0.51 -1.89 -1.25
21304094 -1.02 -0.92 -0.86 -0.59 -0.53 -1.88 -0.61
21304095 -1.13 -0.97 -0.87 -0.50 -0.41 -1.70 -1.3
21304096 -0.95 -0.86 -0.79 -0.69 -0.70 -1.58 -1.06
21304097 -0.96 -0.86 -0.78 -0.30 -0.13 -1.88 -0.26
21304098 -1.11 -0.95 -0.85 -0.62 -0.61 -1.49 -2.13
21304099 -1.04 -0.91 -0.81 -0.57 -0.54 -1.14 -1.9
21304100 -0.66 -0.65 -0.64 -0.39 -0.27 -2.05 -1.4
Average error of indication ageing parameter -0.97-0.63 -0.87-0.56 -0.80-0.65 -0.49-0.68 -0.40-0.69 -1.07-0.96 -1.54-1.04
Table 6 diaphragm gas meter running-in amount running-in 6000m 3rear test result
Figure BDA0000491981390000221
Continued 6
21304020 -0.95 -0.95 -0.95 -0.69 -0.56 -0.70 -1.70
21304021 -1.13 -1.04 -0.98 -0.66 -0.56 -1.68 -1.43
21304022 -0.99 -0.90 -0.84 -0.57 -0.49 -1.98 -0.88
21304023 -0.86 -0.86 -0.86 -0.69 -0.61 -2.05 -2.33
21304024 -0.97 -0.90 -0.87 -0.69 -0.64 -1.61 -2.19
21304025 -1.17 -1.11 -1.07 -0.86 -0.80 -1.50 -2.46
21304026 -1.08 -1.04 -1.02 -0.78 -0.69 -1.98 -1.95
21304027 -1.21 -1.11 -1.04 -0.68 -0.57 -1.86 -1.76
21304028 -1.17 -1.08 -1.02 -0.69 -0.59 -1.75 -1.75
21304029 -0.70 -0.77 -0.96 -0.71 -0.63 -0.99 -1.71
21304030 -1.20 -1.06 -0.96 -0.63 -0.56 -1.21 -1.34
21304031 -1.44 -1.31 -1.22 -0.70 -0.53 -1.56 -2.86
21304032 -1.19 -1.08 -1.02 -0.63 -0.51 -1.34 -2.43
21304033 -1.47 -1.32 -1.23 -0.86 -0.77 -1.33 -2.43
21304034 -1.31 -1.17 -1.07 -0.74 -0.67 -2.13 -1.85
21304035 -1.40 -1.25 -0.77 -0.83 -0.76 -3.04 -1.46
21304036 -1.53 -1.34 -1.21 -0.82 -0.75 -1.58 -1.95
21304037 -1.40 -1.21 -1.07 -0.59 -0.48 -1.01 -1.65
21304038 -1.47 -1.31 -1.22 -0.88 -0.81 -1.29 -1.54
21304039 -1.17 -1.10 -1.04 -0.70 -0.59 -0.81 -1.96
21304040 -1.76 -1.49 -1.31 -0.66 -0.51 -0.66 -1.96
21304041 -1.13 -1.04 -0.96 -0.59 -0.47 -2.91 -1.28
21304042 -1.02 -0.95 -0.89 -0.67 -0.60 -0.84 -0.84
21304043 -1.44 -1.27 -1.15 -0.73 -0.63 -2.05 -0.90
21304044 -1.00 -0.95 -0.93 -0.63 -0.51 -0.83 -2.23
21304045 -1.49 -1.28 -1.13 -0.83 -0.82 -0.69 -2.04
21304046 -1.56 -1.32 -1.16 -0.79 -0.77 -1.68 -1.93
21304047 -1.19 -1.13 -1.10 -0.87 -0.79 -1.68 -2.06
21304048 -0.97 -0.99 -1.00 -0.84 -0.75 -0.01 -2.06
21304049 -1.35 -1.22 -1.13 -0.78 -0.70 -1.20 -1.20
21304050 -0.69 -0.94 -0.77 -0.77 -0.73 -0.80 -1.04
21304051 -1.01 -0.95 -0.90 -0.68 -0.60 -0.89 -2.54
21304052 -1.22 -1.13 -1.08 -0.97 -0.97 -2.00 -2.13
21304053 -0.86 -0.85 -0.84 -0.60 -0.50 -1.65 -1.39
21304054 -0.94 -8.03 -0.87 -0.59 -0.47 -1.54 -1.89
21304055 -1.58 -1.32 -1.16 -0.69 -0.62 0.00 -1.76
21304056 -2.00 -1.68 -1.47 -0.96 -0.93 0.00 -1.94
21304057 -1.59 -1.40 -1.28 -0.87 -0.79 -2.31 -1.91
21304058 -1.49 -1.34 -1.23 -0.86 -0.78 -1.68 -2.46
21304059 -1.13 -1.04 -0.98 -0.77 -0.72 -1.08 -1.84
21304060 -1.70 -1.13 -1.20 -0.59 -0.49 0.53 -1.99
21304061 -1.30 -1.22 -1.16 -0.83 -0.72 -1.71 -1.83
21304062 -0.96 -1.12 -1.05 -0.96 -0.92 -1.21 -1.71
21304063 -1.33 -1.22 -1.16 -0.90 -0.84 -1.29 -1.04
21304064 -0.80 -0.87 -0.92 -0.79 -0.68 -0.91 -0.93
21304065 -1.21 -1.13 -1.08 -0.77 -0.67 0.35 -2.56
21304066 -1.22 -1.13 -1.08 -0.86 -0.80 -0.59 -2.24
21304067 -1.09 -1.04 -1.02 -0.81 -0.74 -0.36 -2.08
21304068 -1.41 -1.26 -1.16 -0.81 -0.71 0.15 -1.98
21304069 -1.06 -1.00 -0.95 -0.64 -0.53 -0.71 -1.81
Continued 6
21304070 -0.86 -0.84 -0.81 -0.56 -0.45 0.50 -1.56
21304071 -1.90 -1.58 -1.38 -0.82 -0.75 -1.08 -1.06
21304072 -1.62 -1.38 -1.22 -0.68 -0.57 -0.74 -2.46
21304073 -1.57 -1.34 -1.20 -0.69 -0.59 -0.49 -2.23
21304074 -1.78 -1.53 -1.36 -0.77 -0.64 -2.31 -2.08
21304075 -1.30 -1.21 -1.14 -0.85 -0.76 -1.79 -2.05
21304076 -1.85 -1.55 -1.34 -0.78 -0.71 -1.16 -1.81
21304077 -1.40 -1.24 -1.13 -0.68 -0.57 -1.04 -1.65
21304078 -1.11 -1.02 -0.95 -0.59 -0.48 -2.25 -0.65
21304079 -1.03 -0.97 -0.94 -0.68 -0.59 -1.96 -2.34
21304080 -1.48 -1.33 -1.23 -0.88 -0.80 -1.80 -2.55
21304081 -0.98 -1.00 -1.01 -0.85 -0.76 -2.16 -2.43
21304082 -1.12 -1.05 -1.02 -0.93 -0.93 -1.94 -2.08
21304083 -0.78 -0.84 -0.86 -0.74 -0.64 -1.06 -1.93
21304084 -0.84 -0.86 -0.87 -0.69 -0.59 -1.99 -2.41
21304085 -1.27 -1.13 -1.04 -0.77 -0.72 -1.45 -2.11
21304086 -1.22 -1.08 -0.98 -0.58 -0.47 -1.24 -1.76
21304087 -0.86 -0.84 -0.81 -0.56 -0.45 -1.20 -2.18
21304088 -1.11 -1.06 -1.04 -0.80 -0.71 -1.48 -1.61
21304089 -1.05 -1.02 -0.99 -0.75 -0.65 -1.81 -1.43
21304090 -1.84 -1.54 -1.33 -0.89 -0.87 -2.21 -2.79
21304091 -1.08 -1.03 -1.00 -0.83 -0.78 -1.93 -1.91
21304092 -1.41 -1.23 -1.12 -0.70 -0.62 -0.96 -1.70
21304093 -1.28 -1.13 -1.04 -0.71 -0.64 -2.06 -1.43
21304094 -1.13 -1.03 -0.96 -0.70 -0.64 -2.03 -0.76
21304095 -1.38 -1.22 -1.13 -0.76 -0.67 -2.05 -1.65
21304096 -1.19 -1.10 -1.04 -0.94 -0.95 -1.91 -1.40
21304097 -1.31 -1.21 -1.13 -0.65 -0.48 -2.36 -0.75
21304098 -1.47 -1.31 -1.21 -0.98 -0.97 -1.99 -2.63
21304099 -1.36 -1.22 -1.13 -0.88 -0.86 -1.58 -2.34
21304100 -0.93 -0.92 -0.91 -0.66 -0.54 -2.43 -1.78
The average error of indication -1.23 -1.20 -1.05 -0.74 -0.65 -1.39 -1.89
Ageing parameter -0.88 -0.88 -0.90 -0.93 -0.94 -1.29 -1.39
Table 7 diaphragm gas meter running-in amount running-in 8000m 3rear test result
Figure BDA0000491981390000241
Continued 7
21304013 -1.42 -1.35 -1.31 -1.03 -0.94 -1.94 -2.71
21304014 -1.58 -1.45 -1.37 -1.04 -0.95 -1.80 -2.33
21304015 -1.45 -1.32 -1.23 -0.78 -0.64 -1.35 -2.46
21304016 -1.57 -1.49 -1.44 -0.99 -0.82 -0.10 -2.75
21304017 -1.32 -1.31 -1.31 -1.04 -0.91 -1.93 -2.41
21304018 -1.01 -1.09 -1.15 -1.12 -1.04 -1.88 -2.36
21304019 -1.31 -1.25 -1.22 -0.90 -0.78 -1.09 -1.98
21304020 -1.13 -1.13 -1.13 -0.87 -0.74 -0.95 -1.95
21304021 -1.34 -1.25 -1.19 -0.86 -0.77 -1.96 -1.71
21304022 -1.53 -1.44 -1.38 -1.11 -1.03 -2.73 -1.63
21304023 -1.17 -1.17 -1.17 -1.01 -0.93 -2.49 -2.76
21304024 -1.50 -1.44 -1.40 -1.22 -1.17 -2.35 -2.93
21304025 -1.28 -1.22 -1.18 -0.97 -0.91 -1.65 -2.61
21304026 -1.18 -1.14 -1.12 -0.88 -0.79 -2.11 -2.09
21304027 -1.49 -1.39 -1.31 -0.95 -0.85 -2.25 -2.15
21304028 -1.40 -1.31 -1.25 -0.93 -0.93 -2.08 -2.08
21304029 -1.15 -1.22 -1.41 -1.16 -1.08 -1.61 -2.34
21304030 -1.75 -1.61 -1.51 -1.18 -1.11 -1.98 -2.1
21304031 -1.74 -1.60 -1.51 -1.00 -0.83 -1.98 -3.28
21304032 -1.43 -1.32 -1.26 -0.87 -0.76 -1.68 -2.76
21304033 -1.54 -1.40 -1.31 -0.94 -0.85 -1.43 -2.53
21304034 -1.49 -1.35 -1.25 -0.92 -0.85 -2.38 -2.1
21304035 -1.49 -1.35 -0.87 -0.93 -0.86 -3.18 -1.6
21304036 -1.64 -1.45 -1.31 -0.93 -0.86 -1.73 -2.1
21304037 -1.64 -1.45 -1.31 -0.84 -0.72 -1.35 -1.99
21304038 -1.68 -1.53 -1.43 -1.10 -1.03 -1.59 -1.84
21304039 -1.35 -1.28 -1.22 -1.88 -0.77 -1.06 -2.21
21304040 -1.89 -1.62 -1.43 -0.78 -0.64 -0.84 -2.14
21304041 -1.45 -1.35 -1.28 -0.90 -0.78 -3.35 -1.71
21304042 -1.37 -1.30 -1.24 -1.02 -0.95 -1.33 -1.33
21304043 -1.62 -1.45 -1.33 -0.91 -0.81 -2.30 -1.15
21304044 -1.39 -1.34 -1.31 -1.02 -0.90 -1.36 -2.76
21304045 -1.87 -1.67 -1.52 -1.22 -1.21 -1.23 -2.58
21304046 -1.91 -1.67 -1.51 -1.14 -1.12 -2.16 -2.41
21304047 -1.31 -1.26 -1.22 -1.00 -0.92 -1.85 -2.24
21304048 -1.10 -1.12 -1.13 -0.96 -0.87 -0.19 -2.24
21304049 -1.46 -1.32 -1.24 -0.89 -0.81 -1.35 -1.35
21304050 -1.04 -1.29 -1.13 -1.12 -1.08 -1.29 -1.53
21304051 -1.43 -1.37 -1.32 -1.10 -1.03 -1.48 -1.313
21304052 -1.42 -1.34 -1.29 -1.18 -1.18 -2.29 -2.41
21304053 -1.16 -1.15 -1.14 -0.91 -0.80 -2.08 -1.81
21304054 -1.27 -8.36 -1.21 -0.92 -0.80 -2.00 -2.35
21304055 -1.82 -1.57 -1.40 -0.94 -0.86 -0.34 -2.1
21304056 -1.94 -1.63 -1.41 -0.91 -0.87 0.07 -1.86
21304057 -1.64 -1.45 -1.32 -0.92 -0.84 -2.38 -1.98
21304058 -1.73 -1.58 -1.47 -1.10 -1.02 -2.00 -2.79
21304059 -1.44 -1.35 -1.29 -1.07 -1.03 -1.50 -2.26
21304060 -2.10 -1.52 -1.59 -0.98 -0.88 -0.03 -2.54
21304061 -1.40 -1.31 -1.26 -0.93 -0.82 -1.85 -1.96
21304062 -1.05 -1.21 -1.11 -1.05 -1.01 -1.34 -1.84
Continued 7
21304063 -1.41 -1.31 -1.24 -0.98 -0.92 -1.40 -1.15
21304064 -0.95 -1.03 -1.07 -0.95 -0.84 -1.13 -1.14
21304065 -1.48 -1.40 -1.35 -1.04 -0.94 -0.02 -2.94
21304066 -1.46 -1.37 -1.31 -1.09 -1.04 -0.91 -2.56
21304067 -1.28 -1.23 -1.21 -1.00 -0.93 -0.63 -2.34
21304068 -1.56 -1.40 -1.31 -0.95 -0.88 -0.05 -2.18
21304069 -1.26 -1.20 -1.15 -0.84 -0.73 -0.99 -2.09
21304070 -1.15 -1.13 -1.10 -0.85 -0.74 0.10 -1.96
21304071 -2.01 -1.69 -1.49 -0.93 -0.86 -1.23 -1.21
21304072 -1.98 -1.74 -1.58 -1.04 -0.93 -1.24 -2.96
21304073 -2.01 -1.78 -1.64 -1.13 -1.04 -1.10 -2.84
21304074 -1.96 -1.71 -1.54 -0.95 -0.82 -2.56 -2.33
21304075 -1.48 -1.39 -1.32 -1.03 -0.94 -2.04 -2.3
21304076 -2.01 -1.70 -1.49 -0.94 -0.86 -1.38 -2.03
21304077 -1.78 -1.63 -1.52 -1.07 -0.95 -1.58 -2.19
21304078 -1.54 -1.45 -1.39 -1.03 -0.91 -2.85 -1.25
21304079 -1.35 -1.30 -1.26 -1.00 -0.91 -2.41 -2.79
21304080 -1.58 -1.44 -1.34 -0.99 -0.91 -1.95 -2.7
21304081 -1.10 -1.12 -1.13 -0.96 -0.87 -2.33 -2.59
21304082 -1.32 -1.26 -1.22 -1.13 -1.13 -2.23 -2.36
21304083 -0.99 -1.04 -1.07 -0.95 -0.85 -1.35 -2.21
21304084 -1.08 -1.10 -1.12 -0.94 -0.84 -2.33 -2.75
21304085 -1.67 -1.54 -1.45 -1.17 -1.13 -2.01 -2.68
21304086 -1.49 -1.36 -1.26 -0.86 -0.75 -1.63 -2.15
21304087 -1.15 -1.13 -1.10 -0.85 -0.74 -1.60 -2.58
21304088 -1.47 -1.42 -1.40 -1.16 -1.07 -1.98 -2.11
21304089 -1.44 -1.40 -1.38 -1.13 -1.04 -2.35 -1.96
21304090 -2.18 -1.88 -1.67 -1.23 -1.22 -2.69 -3.26
21304091 -1.40 -1.34 -1.31 -1.14 -1.10 -2.36 -2.35
21304092 -1.78 -1.60 -1.49 -1.07 -0.99 -1.48 -2.21
21304093 -1.62 -1.48 -1.38 -1.05 -0.98 -2.54 -1.9
21304094 -1.45 -1.35 -1.29 -1.03 -0.96 -2.48 -1.21
21304095 -1.60 -1.45 -1.35 -0.98 -0.89 -2.36 -1.96
21304096 -1.41 -1.32 -1.26 -1.16 -1.17 -2.23 -1.71
21304097 -1.43 -1.32 -1.25 -0.77 -0.59 -2.53 -0.91
21304098 -1.54 -1.38 -1.28 -1.05 -1.04 -2.09 -2.73
21304099 -1.65 -1.51 -1.41 -1.17 -1.14 -1.98 -2.74
21304100 -1.21 -1.20 -1.19 -0.94 -0.82 -2.81 -2.16
The average error of indication -1.48 -1.45 -1.31 -1.01 -0.91 -1.76 -2.23
Ageing parameter -1.14 -1.14 -1.16 -1.20 -1.20 -1.66 -1.74
According to above-mentioned table 1 to the data in table 7 in plane coordinate system taking flow point as X-axis coordinate, to be Y-axis coordinate can obtain the graph of errors of tested diaphragm gas meter 3 when the different running-in amount by trace-point method to error of indication E.As shown in Figure 3, in figure, L0 sign diaphragm gas meter 3 is the graph of errors while carrying out running-in, and L1 represents running-in 400m 3after graph of errors, L2 represents running-in 1000m 3after graph of errors, L3 represents running-in 2000m 3after graph of errors, L4 represents running-in 4000m 3after graph of errors, L5 represents running-in 6000m 3after graph of errors, L6 represents running-in 8000m 3after graph of errors.
According to the ageing parameter in above table, taking flow point as X-axis coordinate, ageing parameter ξ is Y-axis coordinate, can obtain out diaphragm gas meter 3 equally using a period of time to run through the aging curve after certain running-in amount by trace-point method.As shown in Figure 4, in figure, K1 represents running-in 400m 3after aging curve; K2 represents running-in 1000m 3after aging curve; K3 represents running-in 2000m 3after aging curve; K4 represents running-in 4000m 3after aging curve; K5 represents running-in 6000m 3after aging curve; K6 represents running-in 8000m 3after aging curve.
3, on diaphragm gas meter 3, main control module is set as shown in Figure 1, between described diaphragm gas meter and main control module, be provided with temperature sensor, pressure transducer, collection transport module and valve, on main control module, be also provided with the intelligent objects such as wireless remote transmission module, amount of money pre-payment/amount of money payment module, two interface data storage interactive module, electronic seal impression block; On described main control module, be provided with compensation of ageing module, electronic display module and power supply.
4, the graph of errors obtaining and aging curve are put in the compensation of ageing module of corresponding compensating parameter typing main control module in the different running-in amounts of diaphragm gas meter 3 and flow, during in the diaphragm gas meter complete different running-in amounts of 3 running-in and in different flow point, by compensation of ageing module, the stoichiometric number of diaphragm gas meter 3 is carried out the compensation of the corresponding error of indication, make the stoichiometric number of diaphragm gas meter 3 identical with gas actual volume; Then show by electronic display module.
The compensating parameter above-mentioned graph of errors and aging curve being obtained by computing machine is entered in main control module, reading while diaphragm gas meter 3 being exported to gas with corresponding flow point in use for some time by main control module carries out the compensation of the error of indication, thereby make the stoichiometric number of gas precisely, reduced transportation difference rate.Finally realize diaphragm gas meter 3 correction of reading in use for some time by above-mentioned steps, after diaphragm gas meter 3 is run through certain running-in amount, reading is still accurate, has avoided diaphragm gas meter to change because mechanical wear causes negative error.Extend the serviceable life of diaphragm gas meter, reduced the use cost of diaphragm gas meter, improved the economic worth of diaphragm gas meter; Avoid changing the waste that diaphragm gas meter causes.

Claims (6)

1. the measuring accuracy control method of diaphragm gas meter long-time running, is characterized in that comprising the following steps:
A, the diaphragm gas meter (3) of sizing batch production through the error in dipping test of dispatching from the factory laggard enter in the product of storehouse, choose at random one group as tested diaphragm gas meter (3); Select the testing location of test diaphragm gas meter (3) and be ready to proving installation, described proving installation comprises compressed air source unit (1) and standard set-up (2), and the environment of testing location must meet the regulation of JJG577-2012 standard completely; Be that atmospheric pressure is 86～106kPa, temperature is 20 ± 2 DEG C, and relative humidity is 45%～75%, and the difference of the temperature at the temperature at standard set-up place and diaphragm gas meter place is no more than 1 DEG C;
B, name a person for a particular job a certain amount of gas successively by standard set-up (2) and diaphragm gas meter (3) at the different flow of tested diaphragm gas meter (3) respectively, locate to measure the actual volume value of gas at standard set-up (2), locate to obtain the metering numerical value of gas volume at diaphragm gas meter (3), calculate the error of indication of single diaphragm gas meter (3) at each flow point by the actual volume value of gas and the metering numerical value of diaphragm gas meter (3); All calculate once the mean value of all diaphragm gas meters (3) in this flow point error of indication at each flow point of diaphragm gas meter (3), obtaining each flow point place has the average error of indication of diaphragm gas meter (3), the average error of indication by all diaphragm gas meters (3) at each flow point, obtains the graph of errors of diaphragm gas meter (3); Described graph of errors refers to diaphragm gas meter (3) continuous curve that the corresponding average error of indication forms in coordinate system in the time of different flow point;
C, in the time of the complete different running-in amount of tested diaphragm gas meter (3) running-in, repeating step B obtains diaphragm gas meter (3) in the time completing different running-in amount, single diaphragm gas meter (3) at the error of indication of different flow point and all diaphragm gas meters (3) in the average error of indication corresponding to each flow point place; Obtain the graph of errors of diaphragm gas meter (3) in the time completing different running-in amount by the average error of indication;
D, by the diaphragm gas meter (3) that obtains in step B and C at the graph of errors that completes the diaphragm gas meter (3) after different running-in amounts, obtain the aging curve of diaphragm gas meter (3) in the time completing different running-in amount, described aging curve refers to that diaphragm gas meter (3) is in the time completing certain running-in amount, the line curve that on graph of errors, the average error of indication of different flow point forms in coordinate system with respect to the side-play amount of the original average error of indication of correspondence; The described original average error of indication refers to the average error of indication of the diaphragm gas meter (3) that does not carry out running-in;
E, on diaphragm gas meter (3), main control module is set, on described main control module, is provided with compensation of ageing module, electronic display module and power supply;
F, the graph of errors obtaining and aging curve are put in the compensation of ageing module of corresponding compensating parameter typing main control module in the different running-in amounts of diaphragm gas meter (3) and flow, during in the complete different running-in amounts of diaphragm gas meter (3) running-in and in different flow point, by compensation of ageing module, the stoichiometric number of diaphragm gas meter (3) is carried out to the compensation of the corresponding error of indication, make the stoichiometric number of diaphragm gas meter (3) identical with gas actual volume; Then show by electronic display module.
2. the measuring accuracy control method of diaphragm gas meter long-time running as claimed in claim 1, is characterized in that: the graph of errors of testing diaphragm gas meter (3) in step B adopts following steps:
B1, the diaphragm gas meter of tested person (3) is stabilized to the temperature of testing location constant temperature more than four hours;
B2, before test starts, the diaphragm gas meter of tested person (3) is no less than to the test air of 50 times of revolution volumes with maximum flow operation;
B3, the flow that is respectively qmin, 3qmin, qt, 0.2qmax, 0.4qmax, 0.7qmax and qmax at the flow of diaphragm gas meter (3) are named a person for a particular job the air stream of a certain amount of volume that measures actual volume through the diaphragm gas meter (3) of tested person, record the volume that the counter of diaphragm gas meter (3) shows; Each diaphragm gas meter (3) carries out N time respectively at different flow point, 3≤N, and N is integer, and guarantees each test traffic difference, does not allow to carry out follow-on test at same traffic point with identical total flow; The temperature of described air is identical with the temperature of testing location; Wherein qmin represents minimum flow, and qt represents rated flow, and qmax represents maximum flow;
B4, the mean value that calculates respectively N test result of each flow point obtain the error of indication of each flow point; The mean value of all diaphragm gas meters (3) in the error of indication of same flow point is calculated respectively at each flow point place at tested diaphragm gas meter (3), obtain the average error of indication corresponding to the each flow point of all diaphragm gas meters (3) place, obtain the graph of errors of diaphragm gas meter (3) by the average error of indication.
3. the measuring accuracy control method of diaphragm gas meter long-time running as claimed in claim 1, is characterized in that: in described step B, calculate the error of indication and adopt following formula to calculate:
Figure FDA0000491981380000021
In formula: the error of indication of E-single measurement, unit is %; V mthe indicating value of-diaphragm gas meter, unit is dm 3; V ref-by the gas actual value of diaphragm gas meter, unit is dm 3;
Measure the entrance point of diaphragm gas meter and temperature, the pressure that standard set-up (2) is located, carry out temperature, pressure correction by following formula; V ref = Vs × P sa - T ma P ma T sa
In formula: V sthe indicating value of-standard set-up (2), unit is dm 3; P sathe absolute pressure that-standard set-up (2) is located, unit is Pa; T sathe thermodynamic temperature that-standard set-up (2) is located, unit is K; P mathe absolute pressure of-diaphragm gas meter entrance point, unit is Pa; T mathe thermodynamic temperature of-diaphragm gas meter entrance point, unit is K.
4. the measuring accuracy control method of diaphragm gas meter long-time running as claimed in claim 1, it is characterized in that: adopt the method for randomly drawing choosing at random tested diaphragm gas meter (3) described in steps A, random number produces by methods such as the table of random numbers, dice or playing card.
5. the measuring accuracy control method of the diaphragm gas meter long-time running as described in claim 1,2,3 or 4, is characterized in that: the proving installation described in steps A comprises compressed air source unit (1), standard set-up (2), flow control valve (4); Described compressed air source unit (1), standard set-up (2), diaphragm gas meter (3) in turn pipe connect, and the outlet of diaphragm gas meter (3) is provided with flow control valve (4).
6. the measuring accuracy control method of the diaphragm gas meter long-time running as described in claim 1,2,3 or 4, it is characterized in that: between described diaphragm gas meter (3) and main control module, be provided with temperature sensor, pressure transducer, collection transport module and valve, on main control module, be also provided with the intelligent objects such as wireless remote transmission module, amount of money pre-payment/amount of money payment module, two interface data storage interactive module, electronic seal impression block.
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