CN2540640Y - Electric conductive meter calibration instrument - Google Patents
Electric conductive meter calibration instrument Download PDFInfo
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- CN2540640Y CN2540640Y CN 02233269 CN02233269U CN2540640Y CN 2540640 Y CN2540640 Y CN 2540640Y CN 02233269 CN02233269 CN 02233269 CN 02233269 U CN02233269 U CN 02233269U CN 2540640 Y CN2540640 Y CN 2540640Y
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- conductive meter
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Abstract
The utility model relates to a calibration device of a guide electric meter, which has an essential difference compared with an original guide electric meter which uses an alternating current resistance box, when a zero point is checked, a method that preterit electrode resistances are cut, and then the zero point is regulated is changed. The utility model comprises a box body, a panel, a resistance, wherein at least one group of resistance group is arranged in the box body, and each group of the resistance is equipped with a zero point resistance. A rotating switch, a measuring range and an electrode constant selection switch are arranged on the panel, the rotating switch corresponds to the group count of the resistance, the measuring range corresponds to the rotating switch, the panel is further equipped with a resistance output port which is connected with the guide electric meter. The instrument calibration meter has the advantages of convenient carrying, when needing to check the guide electric meter on field, the calibration working is capable of being done only to carry a calibration box, thereby saving the labor power, being convenient for a field staff, and improving the calibration precision.
Description
Technical field
The utility model is a kind of tester, particularly a kind of calibration equipment of electric conductive meter.
Background technology
The verification of electric conductive meter is continued to use traditional AC and DC resistance box at present always and is carried out verification, does not have special-purpose tester, uses the history of existing decades till today.With DC resistance box electric conductive meter is carried out verification, because of electric conductive meter when measuring, the electrode measurement system selects for use alternating voltage to measure, frequency is higher, in case electrode polarization.Therefore, with DC resistance box verification electric conductive meter the time, can produce inductance, make check results produce error.Rules and regulations must select for use a. c. resistance box to carry out instrument check work when carrying out the electric conductive meter verification now.Carry out instrument check when work with a. c. resistance box, a resistance box has only about 100K Ω, but during the pure water electric conductive meter of school, zero mark resistance is 1000k Ω, and instrument is 500K when indicating 0.1 μ s/cm.So just need a lot of resistance box series connection just can use, bring a lot of inconvenience to verification work.Because the resistance box precision that requires verification to use is higher, when selecting the import resistance box for use, a 100K Ω a. c. resistance box price can reach 1.7 ten thousand yuans, promotes the use of the high-precision AC resistance box to the scene like this, and the verification work of electric conductive meter is caused certain difficulty.In addition, be that electrode resistance is disconnected to the balance check of electric conductive meter in the past, regulate zero point again, the resistance value infinity of this moment, verification is come out electric conductive meter zero point and actually differ bigger like this.We do overtesting with the U.S.'s 1850 stator water electric conductive meters in actual applications, and during zero point, the adjustment output current is 4.00mA in the open adjustment of instrument.Be output as 4.15mA when adding 1M Ω zero mark resistance after-current.Calculate the gauge outfit error by current value and can reach 0.9%.Do not add zero mark resistance and can make the inclined to one side end of indication.From reaching a conclusion, check and correction electric conductive meter zero mark resistance is indispensable, should calculate zero mark resistance with accuracy of instrument, instrument minimum division value.
Therefore, one inexpensive, be widely used, high-precision special-purpose electrical conductivity tester easy to carry is that the work on the spot instrument is requisite.
Summary of the invention
The utility model is for the custom-designed promptly simple practical again calibration equipment of electric conductive meter, and a complete easy method of calibration is arranged.Its method of work when being balance check, disconnects the method for again regulating zero point with changing electrode resistance in the past than the difference that an essence was arranged with a. c. resistance box electric conductive meter originally.Therefore, the electric conductive meter checker of our design is not to allow the electrode system open circuit when suppressed zero, but according to different electrode constant, select different zero potential resistance for use, the instrument through selecting for use the verification of different zero potential resistance to come out is only the real zero point of instrument zero point like this.Particularly after some novel digital display electric conductive meters are used this instrument verification, can form a standard slope.In the time of also can making near instrumentation numerical value approaches zero, accuracy of instrument is further improved.With 0.01 constant electrode, 0-10 μ s/cm electric conductive meter is an example, and we can find out from Fig. 1, Fig. 2, open circuit zero point with zero mark resistance instrument is carried out error after the verification.From two curves as can be seen, 100M and 1M slope differ bigger when check for zero, when hanging down conductance measurement, can make the instrument indication higher like this.Will error very big in open circuit cun instrument institute deviational survey rate.Therefore, from above-mentioned two curves as can be seen: to the electric conductive meter verification time, zero mark resistance is indispensable, and it will be related to the precision and the accuracy of instrument.It is necessary selecting different zero mark resistances for use by different electrodes, can make like this through electric conductive meter after the verification when the low electricity of measurement is led, and the numerical measuring result can be more accurate.
Electric conductive meter tester of the present utility model selecting for use of zero point and terminal point range resistance adopted precision reach ten thousand/ measuring resistance, like this, improved the precision of tester to a great extent.
Technology of the present utility model is achieved in that
A kind of electric conductive meter tester, it is made up of casing, panel, resistance, is provided with at least one group of resistor group in casing, is provided with a zero mark resistance in every group of resistance; Panel be provided with the corresponding rotary switch of resistor group number and with corresponding range of rotary switch and electrode constant selector switch, also be provided with the resistance output port that is connected with electric conductive meter on the panel.
Also be provided with the thermo-compensator group in the casing, panel is provided with and the corresponding rotary switch of thermo-compensator, and panel is provided with the thermo-compensator output port that is connected with electric conductive meter.
Each resistance in the resistor group in casing can be to be connected in series as required, also can be that connection in parallel connects.Every group of resistor group rotary switch corresponding with panel connects, and resistance output port L3, the L4 value of the electric conductive meter of verification as required connect resistor group, carry out output verification.
The calibration equipment of our design, but not only school zero point, terminal point on a rotary switch, and can to instrument the direct verification of each scale division value, and improved checking precision, and can design different accuracy resistance according to different electric conductive meter error requirements, reach the verification requirement.But also provide the thermo-compensator value simultaneously, can deserve to be called one the case and use more.
This verification case also can be equipped with the high accuracy number table, can check checker, can also be when verification output detects to the electric conductive meter electric current, a cover instrument can be finished the work of electric conductive meter complete verification.
This instrument check instrument is easy to carry, when verification need be carried out to electric conductive meter in the scene, only need band colonel tryoff can carry out verification work fully, range check, electric current output verification, because of its rectifier has four kinds of different electrode constant, summarized electric conductive meter electrode constant commonly used substantially.As long as wherein any rotary switch once just can be finished whole instrument check work from the 1-10 rotation, saved manpower, make things convenient for the field personnel, and improved checking precision.
Description of drawings
Fig. 1: zero mark resistance verification slope;
Fig. 2: offresistance balance check slope;
Fig. 3: embodiment 1 panel synoptic diagram;
Resistance connection layout in Fig. 4: embodiment 1 casing.
Embodiment
As Fig. 3, shown in Figure 4, in casing, be provided with six groups of resistor group and one group of thermo-compensator, resistance in the first five group resistor group is for being connected in series, the 6th group of resistor group and thermo-compensator are for being connected in parallel, panel is provided with and resistor group and the corresponding rotary switch of thermo-compensator, also be provided with temperature compensation output port L1 on the panel, L2 and resistance output port L3, L4, also be provided with range and electrode constant selector switch on the panel, according to the actual range of survey electric conductive meter and any retaining among the electrode constant selector switch 1-6, in corresponding 1-6 the rotary switch on the corresponding panel one just can carry out verification to corresponding electric conductive meter.In the present embodiment, first group of resistor group is the resistor group that designs according to the U.S.'s 1850 electric conductive meters, computing formula is R=1/KC, electrode constant is 0.01, be non-linear 0-10 scale, zero mark resistance is 1M Ω, and Chuan Lian resistance is 942K Ω, 30K Ω, 10K Ω, 5K Ω, 1K Ω, 9K Ω, 0K Ω or the like successively; The the 2nd to the 5th group of resistor group is by the design of British Kent company, and the zero mark resistance value is 1 ~ 5M Ω.The numerical value of other resistance by formula, occurrence such as Fig. 4.
The thermo-compensator value is 46.9 Ω, 100 Ω, 180 Ω, 200 Ω, 1000 Ω, 8.9 Ω K, 9 Ω K on this instrument, and the realistic requirement of precision has made things convenient for verification work.
During use, after connecing the electrode constant of numerical value correspondence of rotary switch and range earlier and the output resistance selector switch being corresponding, again L3, L4 are connected to the electric conductive meter electrode output, then can carry out instrument check work.Elder generation's zeroising is transferred terminal point again, and sees other scale division value again after output current value is corresponding, sees that its scale division value is whether within error.So just but the electric conductive meter in school is shown count value and is all calculated by R=1/KC, and wherein R is ohm, and C is a mho, and K is an electrode constant.
The use of compensation temperature is then selected for use according to different table meter numerical value that according temperature compensation is marked, and can connect lead-in wire on temperature compensation L1, L2 two-terminal, in the input instrument.
Rotary switch goes to top grade from low grade and goes to from top grade and keep out round trip and then the whole verification of a table can be finished.Save manpower, made things convenient for the field personnel, and improved the precision of tester.
Claims (8)
1. electric conductive meter tester, it is made up of casing, panel, resistance, it is characterized in that being provided with in casing at least one group of resistor group, is provided with a zero mark resistance in every group of resistance; Panel be provided with the corresponding rotary switch of resistor group number and with corresponding range of rotary switch and electrode constant selector switch, also be provided with the resistance output port that is connected with electric conductive meter on the panel.
2. electric conductive meter tester as claimed in claim 1, it is characterized by and be provided with the thermo-compensator group in the casing, panel is provided with and the corresponding rotary switch of thermo-compensator, and panel is provided with the thermo-compensator output port that is connected with electric conductive meter.
3. electric conductive meter tester as claimed in claim 1 or 2, each resistance that it is characterized by in the resistor group is to be connected in series.
4. electric conductive meter tester as claimed in claim 1 or 2, each resistance that it is characterized by in the resistor group is that connection in parallel connects.
5. electric conductive meter tester as claimed in claim 1 or 2 is characterized by every group of resistor group rotary switch corresponding with panel and connects, and is exported by the resistance output port.
6. electric conductive meter tester as claimed in claim 1 or 2 is characterized by and be provided with 4-8 group resistor group and one group of thermo-compensator group in casing.
7. electric conductive meter tester as claimed in claim 1 or 2 is characterized by and be provided with 6 groups of resistor group and one group of thermo-compensator group in casing.
8. electric conductive meter tester as claimed in claim 1, it is characterized by described zero mark resistance value is 1M Ω ~ 5M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02233269 CN2540640Y (en) | 2002-04-29 | 2002-04-29 | Electric conductive meter calibration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02233269 CN2540640Y (en) | 2002-04-29 | 2002-04-29 | Electric conductive meter calibration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2540640Y true CN2540640Y (en) | 2003-03-19 |
Family
ID=33708447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02233269 Expired - Fee Related CN2540640Y (en) | 2002-04-29 | 2002-04-29 | Electric conductive meter calibration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2540640Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197148A (en) * | 2013-04-01 | 2013-07-10 | 国家电网公司 | Storage battery internal resistance collector |
-
2002
- 2002-04-29 CN CN 02233269 patent/CN2540640Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197148A (en) * | 2013-04-01 | 2013-07-10 | 国家电网公司 | Storage battery internal resistance collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |