CN2658910Y - Simple instrument checker - Google Patents
Simple instrument checker Download PDFInfo
- Publication number
- CN2658910Y CN2658910Y CN 03209498 CN03209498U CN2658910Y CN 2658910 Y CN2658910 Y CN 2658910Y CN 03209498 CN03209498 CN 03209498 CN 03209498 U CN03209498 U CN 03209498U CN 2658910 Y CN2658910 Y CN 2658910Y
- Authority
- CN
- China
- Prior art keywords
- instrument
- checker
- diode
- simple instrument
- slide rheostat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a simple instrument parity checker to make up the insufficiency in prior automatic instrument checking technology. The utility model is characterized in that a standard resistance (3), a milli-amperemeter (2), a diode (5) and a sliding rheostat (4) are connected end to end. Cathode of the diode (5) is connected with the positive current input end of the milli-amperemeter (2) while the anode is joined to the sliding rheostat (4). This simple instrument parity checker can check instrument quickly with low cost.
Description
Technical field:
The utility model relates to a kind of calibration equipment, especially a kind of simple instrument checker that is widely used in instrument and meter for automation, frequency converter verification.
Background technology:
Equipment such as instrument and meter for automation, frequency converter is often needing verification after use after a while.In addition when signal transmitting elements such as these equipment and transmitter are used in combination, actually the instrument indication usually takes place can't judge that unusually but or the instrument transmitter that breaks down breaks down, so the verification of these equipment is just more become key.Existing instrument and meter for automation, the most complex structure of frequency converter calibration equipment, cost an arm and a leg, these equipment is bought in general instrument and meter for automation, Inverter Application place all impotentia, the urgent needs that therefore a kind ofly measure conveniently, simple instrument calibration equipment with low cost become these places safety in production.
The utility model content:
For overcome existing instrument and meter for automation, frequency converter calibration equipment do not have a kind ofly measure conveniently, the deficiency of simple instrument verification dress device with low cost, the utility model provides a kind of simple instrument checker, and this kind simple instrument checker has check meter fast, characteristics that the verification cost is low.
Technical solutions of the utility model are: this kind simple instrument checker, comprise the measuring resistance, milliampere reometer, diode, the slide rheostat that place in the housing, wherein measuring resistance, milliampere reometer, diode, slide rheostat are linked in sequence from beginning to end, the negative electrode of described diode is connected to the cathode power supply input end of milliampere reometer, and its anode links to each other with slide rheostat.The measuring resistance resistance is 250 ohm.
The beneficial effect that the utlity model has is: be connected to the instrument of desiring verification or the transducer signal input end of frequency converter owing to take simple instrument checker in the such scheme two can be stretched out the anodal incoming end A of verification object of housing and verification object negative pole incoming end B, and original transducer signal loop is disconnected, regulate slide rheostat observe the milliampere reometer reading of the indicated value of desiring measurement equipment and checker whether identical get final product verification go out this equipment normally whether, the complete cost of described simple instrument checker is at Renminbi below 100,1-2 minute detection time, so the technical program has check meter fast, the characteristics that the verification cost is low.
Description of drawings:
Accompanying drawing 1 is a composition synoptic diagram of the present utility model;
1-housing among the figure, 2-milliampere reometer, 3-measuring resistance, 4-slide rheostat, 5-diode, the anodal incoming end of A-verification object, B-verification object negative pole incoming end.
Embodiment:
Below in conjunction with accompanying drawing will the utility model is described in further detail:
By shown in Figure 1, this kind simple instrument checker, comprise the measuring resistance 3 that places in the housing 1, milliampere reometer 2, diode 5, slide rheostat 4, wherein measuring resistance 3, milliampere reometer 2, diode 5, the mode that slide rheostat 4 adopts the head and the tail order to link to each other connects, the negative electrode of importantly described diode 5 must be connected to the cathode power supply input end of milliampere reometer 2, its anode links to each other with slide rheostat 4, the purpose of doing like this is that guarantee the to flow through electric current of milliampere reometer 2 is always forward current, avoids taking place in checking procedure the damage that milliampere reometer causes because of current opposite in direction.In addition, determine in measuring resistance 3 resistances to be that 250 ohm of described simple instrument checkers can reach positive and negative 3% measuring accuracy by a large amount of experiments.
When reality is used, disconnect earlier the transducer signal input circuit of desiring the equipment tested, anodal incoming end A of two verification objects and verification object negative pole incoming end B that just simple and easy then checker stretches out housing are connected to the positive and negative signal input part of transmitter of desiring check meter or frequency converter respectively, and this connection can adopt crocodile clip and colloid insulated conductor to finish; Whether the indicated value of after this regulating slide rheostat 4 observation desire measurement equipments is identical with the reading of the milliampere reometer 2 of checker, then to desire the intact indication of measurement equipment be owing to transducer circuit produces unusually as identical, otherwise then desire the measurement equipment existing problems, transmitter may non-fault.
Claims (2)
1, a kind of simple instrument checker, comprise the measuring resistance (3), milliampere reometer (2), diode (5), the slide rheostat (4) that place in the housing (1), it is characterized in that: measuring resistance (3), milliampere reometer (2), diode (5), slide rheostat (4) head and the tail are linked in sequence, the negative electrode of described diode (5) is connected to the cathode power supply input end of a milliampere reometer (2), and its anode links to each other with slide rheostat (4).
2, a kind of simple instrument checker according to claim 1 is characterized in that: measuring resistance (3) resistance is 250 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209498 CN2658910Y (en) | 2003-09-15 | 2003-09-15 | Simple instrument checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03209498 CN2658910Y (en) | 2003-09-15 | 2003-09-15 | Simple instrument checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2658910Y true CN2658910Y (en) | 2004-11-24 |
Family
ID=34325175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03209498 Expired - Fee Related CN2658910Y (en) | 2003-09-15 | 2003-09-15 | Simple instrument checker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2658910Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305640A (en) * | 2011-08-05 | 2012-01-04 | 中国石化集团第十建设公司 | Instrument power supply for live debugging |
| CN102809739A (en) * | 2012-08-23 | 2012-12-05 | 四川电力科学研究院 | Method and device for checking storage battery internal resistance tester |
-
2003
- 2003-09-15 CN CN 03209498 patent/CN2658910Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305640A (en) * | 2011-08-05 | 2012-01-04 | 中国石化集团第十建设公司 | Instrument power supply for live debugging |
| CN102809739A (en) * | 2012-08-23 | 2012-12-05 | 四川电力科学研究院 | Method and device for checking storage battery internal resistance tester |
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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 |