CN105891762B - A kind of setting method of the specifications parameter of electric instrument - Google Patents
A kind of setting method of the specifications parameter of electric instrument Download PDFInfo
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- CN105891762B CN105891762B CN201410478944.XA CN201410478944A CN105891762B CN 105891762 B CN105891762 B CN 105891762B CN 201410478944 A CN201410478944 A CN 201410478944A CN 105891762 B CN105891762 B CN 105891762B
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Abstract
The present invention provides a kind of setting method of the specifications parameter of electric instrument: step 1): specifying a specifications parameter group；Step 2): the configuration parameter of electric energy metering module is calculated；Step 3): the measurement error of electric energy metering module when specifications parameter is the specifications parameter in specifications parameter group is successively calibrated；Step 4): specifications parameter of the specifications parameter as electric instrument in specifications parameter group is selected, and the configuration parameter of the corresponding electric energy metering module of specifications parameter and calibration data are arranged into electric energy metering module, to obtain the electric instrument of selected specifications parameter.It can choose the specifications parameter that a specifications parameter in specifications parameter group is electric instrument when use, obtain the electric instrument of selected specifications parameter, the electric instrument of multiple specifications parameters is replaced using the settable electric instrument of specifications parameter, to reduce total stockpile number of electric instrument, the occupied space of electric instrument when reducing inventory cost and the inventory of electric instrument.
Description
Technical field
The present invention relates to electrotechnical measurement technical field more particularly to a kind of setting methods of the specifications parameter of electric instrument.
Background technique
It in the power system, is as shown in Figure 1 Monophase electric power instrument using the electricity consumption of electric instrument measuring power user
Functional block diagram, the utilization voltage and electricity consumption electric current of power consumer be converted to voltage after overvoltage sensor and current sensor
The single-phase electric energy metering module of Monophase electric power instrument is sent into after signal and current signal, single-phase electric energy metering module is completed to join electricity
Several measurements, such as voltage, electric current, active power, reactive power, active energy and reactive energy etc., the place of Monophase electric power instrument
Reason device reads the active energy of single-phase electric energy metering module and is handled, recorded, shown, thus the electricity consumption to power consumer
Amount is measured, and the active energy pulse signal of single-phase electric energy metering module is defeated as the active energy pulse of Monophase electric power instrument
Signal out, the Monophase electric power instrument of same amount limit is not corresponding with different meter constants.Fig. 2 show the function of three-phase power instrument
Block diagram, the ABC phase utilization voltage and ABC phase electricity consumption electric current of power consumer are converted to after overvoltage sensor and current sensor
The three-phase electric energy metering module of three-phase power instrument, the completion pair of three-phase electric energy metering module are sent into after voltage signal and current signal
The measurement of electrical parameter, such as voltage, electric current, active power, reactive power, active energy and reactive energy etc., three-phase power instrument
Processor read three-phase electric energy metering module active energy and handled, recorded, shown, thus to power consumer
Electricity consumption is measured, active energy arteries and veins of the active energy pulse signal of three-phase electric energy metering module as three-phase power instrument
Output signal is rushed, the three-phase power instrument of same amount limit is not corresponding with different meter constants.
Resistance, capacitor as used in the electric energy metering module of electric instrument, voltage sensor, current sensor, mould
Parameter error of number converter etc., it is necessary to the measurement error of the electric energy metering module in electric instrument is calibrated, in this way,
The energy metering accuracy of electric instrument can just be met the requirements.
The specifications parameter of electric instrument is voltage specification, current specification, meter constant etc., the electric instrument after dispatching from the factory at present
Specifications parameter be fixed value, cannot change, the following is the electric instrument of different size parameter:
The specifications parameter of electric instrument: voltage specification, current specification, meter constant, accuracy class is provided by buying side, it is raw
The electric instrument of specifications parameter specified by business men production procurement side, electric instrument memory, which alludes to, determines electricity corresponding to specifications parameter
Therefore the parameter and calibration data of energy metering module cannot change the specifications parameter of electric instrument after the completion of production, otherwise, electricity
The energy metering accuracy of power instrument may change.
Since the type of the specifications parameter of electric instrument is more, if the corresponding a certain number of electricity of each equal inventory of specifications parameter
When power instrument, the sum that will cause the electric instrument in inventory is excessive, electric power when increasing inventory cost and the inventory of electric instrument
The occupied space of instrument, it is therefore desirable to which a kind of electric instrument that specifications parameter is settable replaces the electric power instrument of multiple specifications parameters
Table, reduces the number of species of the specifications parameter of electric instrument, to reduce total stockpile number of electric instrument, reduces electric power instrument
The inventory cost of table and when inventory electric instrument occupied space.
Summary of the invention
The purpose of the present invention is to provide a kind of setting methods of the specifications parameter of electric instrument, so that the rule of electric instrument
Lattice parameter can select any one specifications parameter for the specifications parameter of electric instrument in specified specifications parameter group, and electric power
The energy metering accuracy of instrument remains unchanged, since the specifications parameter of electric instrument can select in specified specifications parameter group
It selects, therefore the electric instrument of multiple specifications parameters can be replaced with the settable electric instrument of a specifications parameter, reduce electric power
The number of species of the specifications parameter of instrument, to reduce total stockpile number of electric instrument, the inventory for reducing electric instrument at
The occupied space of electric instrument when this and inventory.
In order to achieve the above objectives, the technical scheme adopted by the invention is as follows:
A kind of setting method of the specifications parameter of electric instrument, comprising the following steps:
Step 1): the specifications parameter group of an electric instrument is specified, includes in the specifications parameter group of the electric instrument
The specifications parameter of electric instrument several selectable electric instruments when working, and the specifications parameter group of the electric instrument is deposited
It is stored in the memory of electric instrument；
Step 2): the rule of electric instrument described in step 1) are calculated according to the requirement of the electric energy metering module of electric instrument
The configuration parameter of the corresponding electric energy metering module of the specifications parameter of electric instrument in lattice parameter group, and by the electric instrument
The configuration parameter of the corresponding electric energy metering module of specifications parameter be stored in the memory of electric instrument；
Step 3): successively select the specifications parameter in the specifications parameter group of electric instrument described in step 1) for electric instrument
Specifications parameter, then by the configuration parameter of the corresponding electric energy metering module of the specifications parameter of electric instrument described in step 2)
It is arranged into the electric energy metering module of electric instrument, then calibrates the measurement error of the electric energy metering module of electric instrument, then will
The calibration data of the measurement error of the corresponding electric energy metering module of the specifications parameter of the electric instrument is stored in electric instrument
Memory in；
Step 4): one in the specifications parameter group of the step 1) electric instrument is selected by the communication interface of electric instrument
A specifications parameter as electric instrument specifications parameter and be stored in the memory of electric instrument, then will be described in step 2)
The rule of electric instrument described in the configuration parameter and step 3) of the corresponding electric energy metering module of the specifications parameter of electric instrument
The calibration data of the measurement error of the corresponding electric energy metering module of lattice parameter is arranged into the electric energy metering module of electric instrument,
To obtain the electric instrument of selected specifications parameter.
Due to corresponding to the specifications parameter of all electric instruments in the specifications parameter group of electric instrument in step 3)
The measurement error of electric energy metering module of electric instrument calibration all has been carried out, so, when the specification of selection electric instrument
Specifications parameter of the specifications parameter as electric instrument in parameter group, and by the specifications parameter phase of selected electric instrument
The electrical energy measurement mould of the configuration parameter of corresponding electric energy metering module and the corresponding electric instrument of the specifications parameter of electric instrument
When the calibration data of the measurement error of block is arranged into the electric energy metering module of electric instrument, selected specifications parameter is obtained
The metering of the measurement error of electric instrument electric instrument corresponding with the specifications parameter of electric instrument when step 3) alignment
Error is identical.
The beneficial effects of the present invention are: provide a kind of setting method of the specifications parameter of electric instrument, when use, can root
It is the specifications parameter of electric instrument according to a specifications parameter in the specifications parameter group for needing to select specified electric instrument, and will
The configuration parameter of the corresponding electric energy metering module of the specifications parameter of selected electric instrument and the specifications parameter of electric instrument
Electrical energy measurement mould of the calibration data setting of the measurement error of the electric energy metering module of corresponding electric instrument to electric instrument
In block, to obtain the electric instrument of selected specifications parameter, the electric instrument when measurement error of electric instrument and calibration
The measurement error of the corresponding electric instrument of specifications parameter is identical, therefore the specifications parameter of an available electric instrument is settable
Electric instrument replaces the electric instruments of multiple specifications parameters, the number of species of the specifications parameter of electric instrument is reduced, to drop
Total stockpile number of low electric instrument, the occupied space of electric instrument when reducing inventory cost and the inventory of electric instrument.
Figure of description explanation
Fig. 1 Monophase electric power instrument function block diagram
Fig. 2 three-phase power instrument function block diagram
Specific embodiment
Specific elaboration is made to the present invention below in conjunction with specific embodiment；
Embodiment 1
For the three-phase and four-line electric instrument of following different size parameter: [3x220/380V, 3x1.5 (6) A, 6400imp/
KWh], [3x220/380V, 3x5 (20) A, 1200imp/kWh], [3x220/380V, 3x10 (40) A, 1200imp/kWh],
[3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh], [3x57.7/100V, 3x5 (20) A, 6400imp/kWh], electric energy
Three-phase electric energy metering modules A TT7022EU of the metering module using huge spring photoelectricity (Shanghai) limited liability company, three-phase electric energy meter
Measure the signal input circuit requirement of modules A TT7022EU are as follows: when input rated voltage, the voltage of voltage signal input circuit is believed
It number is about 0.2V or so with the product of voltage channel gain, when specified input current, the voltage of current signal input circuit is believed
It number is about 0.05V or so with the product of current channel gain, the input voltage measurement of three-phase and four-line electric instrument is using resistance point
Pressure mode obtains voltage measurement signal and is input to the voltage signal input circuit of three-phase electric energy metering modules A TT7022EU, when
The voltage measurement signal voltage of the voltage signal input circuit of three-phase electric energy metering modules A TT7022EU when input voltage is 220V
Input current measurement for 0.11V, three-phase and four-line electric instrument is obtained by the way of current transformer and current sampling resistor
Current measurement signal and the current signal input circuit for being input to three-phase electric energy metering modules A TT7022EU, when input current is
When 10A the current measurement signal voltage of the voltage signal input circuit of three-phase electric energy metering modules A TT7022EU be 0.04V, three
The calculation formula of the high-frequency impulse constant HFConst of phase electric energy metering module ATT7022EU are as follows:
HFConst=INT [2.592*10^10*G*G*Vu*Vi/ (EC*Un*Ib)].
G=1.163.
The voltage measurement signal voltage of voltage signal input circuit and voltage channel gain when Vu is input rated voltage
Product.
Vi is the current measurement signal voltage and current channel gain of current signal input circuit when inputting rated current
Product.
EC is the meter constant of three-phase electric energy metering modules A TT7022EU.
Un is input rated voltage, unit: V.
Ib is input rated current, unit: A.
INT is floor operation.
Therefore, the specifications parameter of three-phase and four-line electric instrument is [3x220/380V, 3x1.5 (6) A, 6400imp/kWh]
When, it is 2 that the configuration parameter of corresponding electric energy metering module ATT7022EU, which is voltage channel gain, current channel gain 8,
High-frequency impulse constant is 175；
When the specifications parameter of three-phase and four-line electric instrument is [3x220/380V, 3x5 (20) A, 1200imp/kWh], relatively
The configuration parameter of the electric energy metering module ATT7022EU answered is that voltage channel gain is 2, current channel gain 2, high-frequency impulse
Constant is 234；
When the specifications parameter of three-phase and four-line electric instrument is [3x220/380V, 3x10 (40) A, 1200imp/kWh], relatively
The configuration parameter of the electric energy metering module ATT7022EU answered is that voltage channel gain is 2, current channel gain 1, high-frequency impulse
Constant is 117；
When the specifications parameter of three-phase and four-line electric instrument is [3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh], phase
It is 8 that the configuration parameter of corresponding electric energy metering module ATT7022EU, which is voltage channel gain, current channel gain 8, high frequency arteries and veins
Rushing constant is 223；
When the specifications parameter of three-phase and four-line electric instrument is [3x57.7/100V, 3x5 (20) A, 6400imp/kWh], relatively
The configuration parameter of the electric energy metering module ATT7022EU answered is that voltage channel gain is 8, current channel gain 2, high-frequency impulse
Constant is 175；
The specifications parameter that three-phase and four-line electric instrument is arranged when factory is [3x220/380V, 3x1.5 (6) A, 6400imp/
KWh], the specifications parameter of setting three-phase and four-line electric instrument is [3x220/380V, 3x10 (40) A, 1200imp/ when use
KWh],
The present embodiment the technical solution adopted is that:
Step 1): the specifications parameter group of a specified three-phase and four-line electric instrument: [3x220/380V, 3x1.5 (6) A,
6400imp/kWh], [3x220/380V, 3x5 (20) A, 1200imp/kWh], [3x220/380V, 3x10 (40) A, 1200imp/
KWh], [3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh], [3x57.7/100V, 3x5 (20) A, 6400imp/kWh],
And the specifications parameter group of the three-phase and four-line electric instrument is stored in the memory of three-phase and four-line electric instrument；
Step 2): step 1) is calculated according to the requirement of the electric energy metering module ATT7022EU of three-phase and four-line electric instrument
The corresponding electric energy of specifications parameter of three-phase and four-line electric instrument in the specifications parameter group of the three-phase and four-line electric instrument
The configuration parameter of metering module ATT7022EU, and by the corresponding electric energy meter of the specifications parameter of the three-phase and four-line electric instrument
The configuration parameter of amount modules A TT7022EU is stored in the memory of three-phase and four-line electric instrument；
| The specifications parameter of three-phase and four-line electric instrument | The configuration parameter of corresponding electric energy metering module ATT7022EU |
| 3x220/380V, 3x1.5 (6) A, 6400imp/kWh | Gv=2；Gi=8；HFConst=175 |
| 3x220/380V, 3x5 (20) A, 1200imp/kWh | Gv=2；Gi=2；HFConst=234 |
| 3x220/380V, 3x10 (40) A, 1200imp/kWh | Gv=2；Gi=1；HFConst=117 |
| 3x57.7/100V 3x1.5 (6) A, 20000imp/kWh | Gv=8；Gi=8；HFConst=223 |
| 3x57.7/100V 3x5 (20) A, 6400imp/kWh | Gv=8；Gi=2；HFConst=175 |
Gv is voltage channel gain；
Gi is current channel gain；
HFConst is pulsed high-frequency constant；
Step 3): selection [3x220/380V, 3x1.5 (6) A, 6400imp/kWh] is the specification of three-phase and four-line electric instrument
Parameter, then by the specifications parameter of three-phase and four-line electric instrument described in step 2) [3x220/380V, 3x1.5 (6) A,
6400imp/kWh] corresponding electric energy metering module ATT7022EU configuration parameter [Gv=2；Gi=8；HFConst=175]
It is arranged into the electric energy metering module ATT7022EU of three-phase and four-line electric instrument, then calibrates the electricity of three-phase and four-line electric instrument
Can metering module ATT7022EU measurement error, then by specifications parameter [3x220/380V, the 3x1.5 of three-phase and four-line electric instrument
(6) A, 6400imp/kWh] calibration data of measurement error of corresponding electric energy metering module ATT7022EU is stored in three-phase
In the memory of four line electric instruments；
Selecting [3x220/380V, 3x5 (20) A, 1200imp/kWh] is the specifications parameter of three-phase and four-line electric instrument, so
Afterwards by the corresponding electric energy meter of the specifications parameter of three-phase and four-line electric instrument [3x220/380V, 3x5 (20) A, 1200imp/kWh]
Measure the configuration parameter [Gv=2 of modules A TT7022EU；Gi=2；HFConst=234] electricity for arriving three-phase and four-line electric instrument is set
In energy metering module ATT7022EU, the metering for then calibrating the electric energy metering module ATT7022EU of three-phase and four-line electric instrument is missed
Difference, then by the corresponding electricity of specifications parameter [3x220/380V, 3x5 (20) A, 1200imp/kWh] of three-phase and four-line electric instrument
The calibration data of the measurement error of energy metering module ATT7022EU is stored in the memory of three-phase and four-line electric instrument；
Selecting [3x220/380V, 3x10 (40) A, 1200imp/kWh] is the specifications parameter of three-phase and four-line electric instrument, so
Afterwards by the corresponding electric energy of the specifications parameter of three-phase and four-line electric instrument [3x220/380V, 3x10 (40) A, 1200imp/kWh]
Configuration parameter [the Gv=2 of metering module ATT7022EU；Gi=1；HFConst=117] it is arranged to three-phase and four-line electric instrument
In electric energy metering module ATT7022EU, the metering of the electric energy metering module ATT7022EU of three-phase and four-line electric instrument is then calibrated
Error, then the specifications parameter [3x220/380V, 3x10 (40) A, 1200imp/kWh] of three-phase and four-line electric instrument is corresponding
The calibration data of the measurement error of electric energy metering module ATT7022EU is stored in the memory of three-phase and four-line electric instrument；
Selecting [3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh] is the specifications parameter of three-phase and four-line electric instrument,
Then the specifications parameter of three-phase and four-line electric instrument [3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh] is corresponding
Configuration parameter [the Gv=8 of electric energy metering module ATT7022EU；Gi=8；HFConst=223] it is arranged and arrives three-phase and four-line electric power instrument
In the electric energy metering module ATT7022EU of table, then calibrate the electric energy metering module ATT7022EU's of three-phase and four-line electric instrument
Measurement error, then the metering of the corresponding electric energy metering module ATT7022EU of the specifications parameter of three-phase and four-line electric instrument is missed
The calibration data of difference is stored in the memory of three-phase and four-line electric instrument；
Selecting [3x57.7/100V, 3x5 (20) A, 6400imp/kWh] is the specifications parameter of three-phase and four-line electric instrument, so
Afterwards by the corresponding electric energy of the specifications parameter of three-phase and four-line electric instrument [3x57.7/100V, 3x5 (20) A, 6400imp/kWh]
Configuration parameter [the Gv=8 of metering module ATT7022EU；Gi=2；HFConst=175] it is arranged to three-phase and four-line electric instrument
In electric energy metering module ATT7022EU, the metering of the electric energy metering module ATT7022EU of three-phase and four-line electric instrument is then calibrated
Error, then by the measurement error of the corresponding electric energy metering module ATT7022EU of the specifications parameter of three-phase and four-line electric instrument
Calibration data is stored in the memory of three-phase and four-line electric instrument；
Step 4): the specifications parameter of three-phase and four-line electric instrument when configuration factory.Pass through the logical of three-phase and four-line electric instrument
Communication interface selects the rule of specifications parameter [3x220/380V, 3x1.5 (6) A, 6400imp/kWh] as three-phase and four-line electric instrument
Lattice parameter is simultaneously stored in the memory of three-phase and four-line electric instrument, then by the specification of selected three-phase and four-line electric instrument
The electric energy metering module of the corresponding three-phase and four-line electric instrument of parameter [3x220/380V, 3x1.5 (6) A, 6400imp/kWh]
Configuration parameter [the Gv=2 of ATT7022EU；Gi=8；HFConst=175] and selected three-phase and four-line electric instrument specification
The electric energy metering module of the corresponding three-phase and four-line electric instrument of parameter [3x220/380V, 3x1.5 (6) A, 6400imp/kWh]
The calibration data of the measurement error of ATT7022EU is arranged into the electric energy metering module ATT7022EU of three-phase and four-line electric instrument,
Specifications parameter is the three-phase and four-line electric instrument of [3x220/380V, 3x1.5 (6) A, 6400imp/kWh] when to obtain factory.
Step 5): the specifications parameter of three-phase and four-line electric instrument when configuration uses.Pass through three-phase and four-line electric instrument
Communication interface selects specifications parameter [3x220/380V, 3x10 (40) A, 1200imp/kWh] as three-phase and four-line electric instrument
Specifications parameter is simultaneously stored in the memory of three-phase and four-line electric instrument, then by the rule of selected three-phase and four-line electric instrument
The electrical energy measurement mould of the corresponding three-phase and four-line electric instrument of lattice parameter [3x220/380V, 3x10 (40) A, 1200imp/kWh]
Specifications parameter [3x220/380V, the 3x10 (40) of the configuration parameter of block ATT7022EU and selected three-phase and four-line electric instrument
A, 1200imp/kWh] corresponding three-phase and four-line electric instrument electric energy metering module ATT7022EU measurement error calibration
Data are arranged into the electric energy metering module ATT7022EU of three-phase and four-line electric instrument, so that specifications parameter is when obtaining factory
The three-phase and four-line electric instrument of [3x220/380V, 3x10 (40) A, 1200imp/kWh].
When inventory, it is only necessary to specifications parameter settable { [3x220/380V, the 3x1.5 of inventory's three-phase and four-line electric instrument
(6) A, 6400imp/kWh], [3x220/380V, 3x5 (20) A, 1200imp/kWh], [3x220/380V, 3x10 (40) A,
1200imp/kWh], [3x57.7/100V, 3x1.5 (6) A, 20000imp/kWh], [3x57.7/100V, 3x5 (20) A,
6400imp/kWh] } three-phase and four-line electric instrument, when use, which can according to need, reconfigures three-phase and four-line electric instrument
Specifications parameter, to reach inventory [3x220/380V, 3x1.5 (6) A, 6400imp/kWh], [3x220/380V, 3x5 (20)
A, 1200imp/kWh], [3x220/380V, 3x10 (40) A, 1200imp/kWh], [3x57.7/100V, 3x1.5 (6) A,
20000imp/kWh], the three-phase and four-line electric instrument of [3x57.7/100V, 3x5 (20) A, 6400imp/kWh] equal-specification parameter
Purpose, it is possible to reduce inventory's total quantity of three-phase and four-line electric instrument.
Claims (1)
1. a kind of setting method of the specifications parameter of electric instrument, which comprises the following steps:
Step 1): the specifications parameter group of an electric instrument is specified, includes electric power in the specifications parameter group of the electric instrument
The specifications parameter of several selectable electric instruments when instrumentation, and the specifications parameter group of the electric instrument is stored in
In the memory of electric instrument；
Step 2): join according to the specification that the requirement of the electric energy metering module of electric instrument calculates electric instrument described in step 1)
The configuration parameter of the corresponding electric energy metering module of the specifications parameter of electric instrument in array, and by the rule of the electric instrument
The configuration parameter of the corresponding electric energy metering module of lattice parameter is stored in the memory of electric instrument；
Step 3): successively select the specifications parameter in the specifications parameter group of electric instrument described in step 1) for the rule of electric instrument
Then lattice parameter the configuration parameter of the corresponding electric energy metering module of the specifications parameter of electric instrument described in step 2) is arranged
Into the electric energy metering module of electric instrument, the measurement error of the electric energy metering module of electric instrument is then calibrated, then will be described
The calibration data of the measurement error of the corresponding electric energy metering module of the specifications parameter of electric instrument is stored in depositing for electric instrument
In reservoir；
Step 4): a rule in the specifications parameter group of the step 1) electric instrument are selected by the communication interface of electric instrument
Lattice parameter as electric instrument specifications parameter and be stored in the memory of electric instrument, then by the electric power instrument of selection
The specifications parameter phase of the electric instrument of the configuration parameter and selection of the corresponding electric energy metering module of the specifications parameter of table
The calibration data of the measurement error of corresponding electric energy metering module is arranged into the electric energy metering module of electric instrument, to obtain
The electric instrument of selected specifications parameter.
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| CN202886580U (en) * | 2012-09-29 | 2013-04-17 | 深圳市亚特尔科技有限公司 | Automated adjustment system for comprehensive multi-parameter electrical measuring instrument |
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| CN103513218A (en) * | 2012-06-27 | 2014-01-15 | 苏州工业园区新宏博通讯科技有限公司 | Calibration method for multi-path alternating-current ammeter |
| CN103513217A (en) * | 2012-06-27 | 2014-01-15 | 苏州工业园区新宏博通讯科技有限公司 | Detection apparatus for aging and working of electric energy meter and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9081043B2 (en) * | 2012-02-10 | 2015-07-14 | Sharp Laboratories Of America, Inc. | System and method for calculating power using contactless voltage waveform shape sensor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293509A (en) * | 2012-02-29 | 2013-09-11 | 陕西省地方电力（集团）有限公司 | Calibrating method of electric energy meter system parameters |
| CN103513218A (en) * | 2012-06-27 | 2014-01-15 | 苏州工业园区新宏博通讯科技有限公司 | Calibration method for multi-path alternating-current ammeter |
| CN103513217A (en) * | 2012-06-27 | 2014-01-15 | 苏州工业园区新宏博通讯科技有限公司 | Detection apparatus for aging and working of electric energy meter and detection method thereof |
| CN202886580U (en) * | 2012-09-29 | 2013-04-17 | 深圳市亚特尔科技有限公司 | Automated adjustment system for comprehensive multi-parameter electrical measuring instrument |
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