CN207832999U - DC potentiometer automatic calibrator - Google Patents
DC potentiometer automatic calibrator Download PDFInfo
- Publication number
- CN207832999U CN207832999U CN201820093701.8U CN201820093701U CN207832999U CN 207832999 U CN207832999 U CN 207832999U CN 201820093701 U CN201820093701 U CN 201820093701U CN 207832999 U CN207832999 U CN 207832999U
- Authority
- CN
- China
- Prior art keywords
- digital voltmeter
- potential difference
- difference meter
- switch
- power supply
- 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.)
- Active
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model proposes a kind of DC potentiometer automatic calibrators, including programmed scanning switch and reference power supply, tested potential difference meter, digital voltmeter and component computer；Programmed scanning switch is equipped with multiple buttons, each button selectively one calibrating channel of connection；First calibrating channel connects digital voltmeter by scanning switch by reference power supply and is formed；Second calibrating channel is detected potential difference meter by programmed scanning switch connection respectively by reference power supply and digital voltmeter and is formed；Digital voltmeter, component computer, printing device are sequentially connected.Reduce the troublesome operation of galvanometer zeroing and reading using automatic calibration and digitized measurement.Due to used system component or constant-current source internal attachment standard resistance, it is measured convenient for current standardization, thus it need not add any instrument and equipment outside, it is simple for structure lucid and lively, traditional circuit connecting mode is changed, is avoided since digital voltmeter is directly connected potential difference meter measurement error caused by potential difference meter.
Description
Technical field
The utility model is related to potential difference meter Calibration Technology field, more particularly to a kind of DC potentiometer automatic Verification dress
It sets.
Background technology
DC potentiometer has that class of accuracy is high, easy to carry, cheap, measurement result is accurately and reliably etc. excellent
Gesture, therefore be widely used in relevant units such as enterprise, scientific research institutions, DC potentiometer is surveyed with the voltage that compensation principle works
Measuring appratus.The characteristics of compensation method is the not branch obtaining current from measurement object, because without interfering measured numerical value, measurement result
Accurately and reliably, potential difference meter has many uses, and is equipped with the utensils such as normal cell, measuring resistance, can not only to accuracy requirement very
High occasion measures the electrical quantities such as electromotive force, potential difference (voltage), electric current, resistance, and coordinates with various energy converters, also can be used
In the measurement and control of the non electrical quantities such as temperature, displacement.The existing calibration method of DC potentiometer is broadly divided into two kinds, is respectively
High-grade DC potentiometer calibrating inferior grade DC potentiometer, the direct checking method of digital voltmeter.Fig. 1 show high-grade
DC potentiometer examines and determine inferior grade DC potentiometer, and this method standard verification and tested instrument are potential difference meter, are needed
More complicated adjusting is carried out, and itself does not have the port of networking operation, it is difficult to realize that the extension of intelligent control, this method are suitable
It is relatively fewer to close quantity, mainly as the calibrating for the higher DC potentiometer of class of accuracy that standard uses, is not suitable for
The calibrating for the relatively low DC potentiometer of grade that batch uses.
Fig. 2 is shown directly measures DC potentiometer using digital voltmeter, which, which can be reduced, is measuring
In the process to the zeroing work of high-grade DC potentiometer, working efficiency is improved to a certain extent.But DC potentiometer
Minimum potential can reach μ V ranks, and according to the requirement of DC potentiometer vertification regulation, the class of accuracy of digital table will be
0.002 grade or more, resolution ratio, which will at least up to be received, lies prostrate rank, this to limit so that the range of choice of digital voltmeter is smaller.
Utility model content
The purpose of this utility model aims to solve at least one of the technological deficiency.
For this purpose, a purpose of the utility model is to propose a kind of DC potentiometer automatic calibrator, including journey
Control scanning switch and the reference power supply being connected respectively with programmed scanning switch, tested potential difference meter, digital voltmeter and system
Computer；The programmed scanning switch is equipped with multiple buttons, each button selectively one calibrating channel of connection；The inspection
Routing includes the first calibrating channel and the second calibrating channel；First calibrating channel is connected by reference power supply by scanning switch
Digital voltmeter is connect to be formed；The second calibrating channel is switched by programmed scanning respectively by reference power supply and digital voltmeter to be connected
Tested potential difference meter is connect to be formed；The digital voltmeter connects component computer；The component computer connects printing device；Institute
State component computer connection programmed scanning switch.
Preferably, including in the reference power supply constant-current source and multiple measuring resistances are set；The measuring resistance is set as 4.
Further, in first calibrating channel, one end of each measuring resistance connects constant-current source, and the other end connects
Connect digital voltmeter.
Further, in second calibrating channel, one end of each measuring resistance connects constant-current source, and the other end connects
Connect tested potential difference meter.
Preferably, the digital voltmeter uses the digital nanovoltmeter of model 2182A.
Preferably, the tested potentiometer is equipped with zeroing knob, and the zeroing knob is fixedly connected with tested potential difference meter and refers to
Needle.
Preferably, the programmed scanning switch includes magnetic-type multicircuit relay and multiple switch；Each switch pair
The output end all the way of relay should be connected.
To achieve the goals above, the embodiment of the utility model one side provides a kind of DC potentiometer automatic Verification
Device has at least the following advantages compared to existing DC potentiometer, is reduced using automatic calibration and digitized measurement
Galvanometer returns to zero and the troublesome operation of reading.Due to used system component or constant-current source internal attachment standard resistance, it is convenient for electric current
Standardization measures, thus need not be simple for structure lucid and lively outside plus any instrument and equipment, by computer, programmed scanning switch and
Digital voltmeter is combined the detection for carrying out potential difference meter, switchs connection potential difference meter using low-heat potential scan, changes biography
The circuit connecting mode of system introduces scanning switch, reduces artificial wiring workload and its resulting contact thermoelectrical potential, avoid
Since digital voltmeter is directly connected potential difference meter measurement error caused by potential difference meter.Realize automatic measurement, data
Automatic sampling processing, original record automatically generate, and greatly improve the efficiency of calibrating, reduce working hour.Using constant-current source, and tie
Standardization resistance is modified the error of digital voltmeter, using its 24 hours class of accuracies, can make digital nanovoltmeter
Class of accuracy promoted 5 times, accuracy and resolution ratio to ensure digital voltmeter meet the requirement of vertification regulation.
The additional aspect of the utility model and advantage will be set forth in part in the description, partly will be from following description
In become apparent, or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment
Become apparent and is readily appreciated that, wherein：
Fig. 1 is the circuit connection structure figure that DC potentiometer is examined and determine in background technology；
Fig. 2 is the circuit diagram for directly measuring DC potentiometer in background technology using digital voltmeter；
Fig. 3 is the electrical block diagram of DC potentiometer automatic calibrator provided by the utility model；
In figure：1, programmed scanning switchs；2, reference power supply；4, it is detected potential difference meter；3, digital voltmeter；5, system-computed
Machine；
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
As shown in Figure 1, a kind of DC potentiometer automatic calibrator that the utility model embodiment provides, including it is program-controlled
Scanning switch 1 and the reference power supply 2 being connected respectively with programmed scanning switch are detected potential difference meter 4, digital voltmeter 3 and are
System computer 5；Programmed scanning switch 1 is equipped with multiple buttons, each button selectively one calibrating channel of connection；Examine and determine channel packet
Include the first calibrating channel and the second calibrating channel；First calibrating channel connects digital voltage by reference power supply 2 by scanning switch
The formation of table 3；Second calibrating channel is connected respectively by programmed scanning switch 1 by reference power supply 2 and digital voltmeter 3 and is detected current potential
Difference meter 4 is formed；Digital voltmeter 3 connects component computer 5；Component computer 5 connects printing device；Component computer 5 connects
Programmed scanning switch 1.
Programmed scanning switch 1 includes magnetic-type multicircuit relay and multiple switch；Each switch is correspondingly connected with relay
Output end all the way.
Constant-current source and multiple measuring resistances are set in reference power supply 2；Measuring resistance is set as 4.It adjusts scanning switch and opens the
When one calibrating channel, one end of each measuring resistance connects constant-current source, and the other end connects digital voltmeter 3.At this point, passing through number
Voltmeter 3 is measured the constant-current source voltage in reference power supply, and according to measurement result, is since digital voltmeter 3 connects
It unites computer 5, component computer 5 calculates the actual resistance of measuring resistance according to the measurement result of digital voltmeter 3, and according to
The actual resistance for calculating gained carries out 0.01 grade and following level to the standard resistance value for being stored in the measuring resistance of computer-internal
Correction.Automatically correcting for reference power supply is realized, prevents the measuring resistance inside due to reference power supply, change in resistance from causing
There is systematic error in measurement result.
In another embodiment of the utility model, in the second calibrating channel, one end of each measuring resistance connects
Constant-current source adjusts scanning switch and makes the other end of measuring resistance connects to be detected potential difference meter 4, and by adjusting scanning switch,
So that digital voltmeter 3 is connected in parallel on 4 both ends of potential difference meter to be detected, wherein digital voltmeter 3 uses the number of model 2182A
Word nanovoltmeter.Tested potentiometer uses UJ42 d.c.comparator potentiometers；Tested potentiometer is equipped with zeroing knob, zeroing rotation
Button is fixedly connected with the pointer of tested potential difference meter 4.It should be noted that in the present embodiment digital voltmeter citing, be not limited to
Citing is stated, can also be other modes, details are not described herein.
The course of work of the automatic calibrator is first to calculate the value input system of constant-current source, that is, First class standard battery
The value that the normal cell end of scanning switch uses digital nanovoltmeter to measure First class standard battery is opened in machine, component computer selection,
The standard value of the quasi- battery of component computer automatic benchmarking is compared with measured value, and thus result calculates digital nanovoltmeter
Error correction values.It observes in next step and is detected whether potential difference meter 4 returns to zero, be tested potential difference meter by adjusting zeroing knob manually
It returns to zero, operating system computer controls scanning switch and opens potential difference meter Measurement channel, is carried out to the potential of potential difference meter
It measures, measurement result is modified automatically by the above process, and revised result is added to the corresponding of original record template
, can be by record storage to memory after being measured successively at position, and external printing device can be passed through and complete original note
The print job of record.Realize automatic measurement, data auto-sampling processing, original record automatically generate, greatly improve
The efficiency of calibrating reduces working hour.Scanning switch is introduced, artificial wiring workload and its resulting contact thermoelectrical potential are reduced,
Using first-class battery as constant-current source, and combined standard resistance was modified the error of digital voltmeter, using its 24 hours
Class of accuracy, can make digital nanovoltmeter class of accuracy promoted 5 times, to ensure digital voltmeter accuracy and point
Resolution meets the requirement of vertification regulation.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiments or example.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and
Modification.The scope of the utility model is by appended claims and its equivalent limits.
Claims (7)
1. a kind of DC potentiometer automatic calibrator, which is characterized in that switch including programmed scanning and swept respectively with program-controlled
Retouch reference power supply, tested potential difference meter, digital voltmeter and component computer that switch is connected；The programmed scanning switch is set
There are multiple buttons, each button selectively one calibrating channel of connection；The calibrating channel include first calibrating channel and
Second calibrating channel；The first calibrating channel connects digital voltmeter by scanning switch by reference power supply and is formed；Described
Two calibrating channels are detected potential difference meter by programmed scanning switch connection respectively by reference power supply and digital voltmeter and are formed；It is described
Digital voltmeter connects component computer；The component computer connects printing device；The component computer connection is program-controlled to sweep
Retouch switch.
2. a kind of DC potentiometer automatic calibrator according to claim 1, which is characterized in that including the standard
Constant-current source and multiple measuring resistances are set in power supply；The measuring resistance is set as 4.
3. a kind of DC potentiometer automatic calibrator according to claim 2, which is characterized in that in first inspection
In routing, one end of each measuring resistance connects constant-current source, and the other end connects digital voltmeter.
4. a kind of DC potentiometer automatic calibrator according to claim 2, which is characterized in that in second inspection
In routing, one end of each measuring resistance connects constant-current source, and other end connection is detected potential difference meter.
5. a kind of DC potentiometer automatic calibrator according to claim 1, which is characterized in that the digital voltage
Table uses the digital nanovoltmeter of model 2182A.
6. a kind of DC potentiometer automatic calibrator according to claim 1, which is characterized in that the tested current potential
Meter is equipped with zeroing knob, and the zeroing knob is fixedly connected with tested potential difference meter pointer.
7. a kind of DC potentiometer automatic calibrator according to claim 1, which is characterized in that the programmed scanning
Switch includes magnetic-type multicircuit relay and multiple switch；Each switch is correspondingly connected with the output end all the way of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820093701.8U CN207832999U (en) | 2018-01-19 | 2018-01-19 | DC potentiometer automatic calibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820093701.8U CN207832999U (en) | 2018-01-19 | 2018-01-19 | DC potentiometer automatic calibrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207832999U true CN207832999U (en) | 2018-09-07 |
Family
ID=63393817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820093701.8U Active CN207832999U (en) | 2018-01-19 | 2018-01-19 | DC potentiometer automatic calibrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207832999U (en) |
-
2018
- 2018-01-19 CN CN201820093701.8U patent/CN207832999U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7305310B2 (en) | System and method for compensating for potential and current transformers in energy meters | |
| CN102981083B (en) | Self calibration equipment for monitoring power quality | |
| CN113503988B (en) | Temperature sensor calibration method and system and temperature sensor | |
| CN101334457B (en) | Multichannel multi-parameter electric measuring meter test system and full-automatic test method | |
| CN109164404A (en) | The system and method that sample circuit in circuit board is calibrated automatically | |
| CN104111436A (en) | Automatic detection system and method for digital multimeter | |
| CN2938573Y (en) | Multi-channel analog-digital conversion device | |
| CN207528816U (en) | A kind of power measuring device | |
| CN207832999U (en) | DC potentiometer automatic calibrator | |
| CN206990658U (en) | The single-phase electric meter of wide temperature range | |
| CN107422192B (en) | Audio equipment input impedance measuring method and device and measurement and verification method and device | |
| CN112152621A (en) | Multi-channel high-precision AD acquisition correction circuit and rapid correction method thereof | |
| CN117433661A (en) | Numerical control platinum resistance simulation test system and method based on four-wire sampling | |
| CN101387696B (en) | Calibration system and method for digital alternating current-direct current tester | |
| CN201281755Y (en) | Assay system for multichannel multi-parameter electric measuring meter | |
| CN106199486A (en) | A kind of measurement system of power meter temperature impact test | |
| CN108709916A (en) | A kind of fruits and vegetables heated-air drying moisture content on-line measurement device and measurement method | |
| CN108548849A (en) | A kind of apparatus and system measuring moisture | |
| CN114894344A (en) | Temperature sensor calibration circuit, device and system | |
| CN207882426U (en) | A kind of system for being calibrated to the absolute delay time | |
| CN201285438Y (en) | Calibration system for digital AC/DC test instrument | |
| CN206348428U (en) | A kind of diode measurement instrument and its system | |
| CN216560964U (en) | Multichannel direct current sensor testing arrangement | |
| Dunets et al. | Multi-functional nanostructured sensors and their adaptation into cyber-physical systems | |
| CN209085802U (en) | A kind of portable multi-channel temperature testing device control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |