CN2177235Y - Calibrating instrument of automatic metre - Google Patents
Calibrating instrument of automatic metre Download PDFInfo
- Publication number
- CN2177235Y CN2177235Y CN 93231800 CN93231800U CN2177235Y CN 2177235 Y CN2177235 Y CN 2177235Y CN 93231800 CN93231800 CN 93231800 CN 93231800 U CN93231800 U CN 93231800U CN 2177235 Y CN2177235 Y CN 2177235Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- utility
- model
- instrument
- prover
- 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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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The utility model provides an automatic calibrating instrument for meters, which is composed of a casing, a circuit board, an electronic circuit and other devices. The circuit of the utility model is composed of a power supply circuit A, a follower circuit B, an amplifying circuit C and a digital display circuit D. Compared with the prior art, the utility model has the advantages of high measuring precision, stable output signals, high anti-interference ability, small size, etc. The utility model can be widely used for the high accuracy calibration of industrial automation instruments and meters, and is a substitute for the products of the prior art.
Description
The purpose of this utility model provides a kind of instrument and meter, especially a kind of instrument and meter for automation prover.
All kinds of automation instruments in the production in use, produce error through regular meeting, need regularly check and calibrate.And the detection signal of instrument and meter is generally electric signal, such as temperature, pressure, flow or weight are become voltage or current signal shows on instrument and meter.In order to make instrument and meter that higher measuring accuracy can be arranged, when instrument and meter is calibrated, the application specific standard instrument will be arranged to being calibrated instrument and meter outputting standard electric signal, as normalized current signal or normal voltage signal, through relatively drawing error, again it is adjusted to the regulation requirement.
Existing instrument and meter prover, generally all unstable at the electric signal output facet, the precision of master meter is also not high enough, can not satisfy the needs of modern high with nothing left industrial develop rapidly.
The purpose of this utility model provides the little calibration accuracy height of a kind of volume, stable output signal, the instrument and meter for automation prover with digital display function of good in anti-interference performance.
The purpose of this utility model realizes in the following manner.
In instrument and meter for automation prover circuit of the present utility model, adopt integrated operational amplifier circuit, high precision integrated regulator, high resolution digital display gauge outfit and other high-precision components and parts, show the degree of accuracy of electric signal with stability and the numeral that improves its output electric signal, and make the miniaturization of instrument complete machine, standardization.
Figure of description 1 is circuitry figure of the present utility model;
Figure of description 2 is mA of the present utility model, DC current source circuit theory diagram;
Figure of description 3 is mV of the present utility model, dc voltage source circuit block diagram;
Figure of description 4 is V of the present utility model, DC power circuit block diagram;
Figure of description 5 is a complete machine panel synoptic diagram of the present utility model.
Explain below with reference to Figure of description the utility model being done.
Instrument and meter for automation prover of the present utility model, its structure is made up of casing, circuit board, electronic circuit and components and parts thereof.Electronic circuit and components and parts thereof are installed on the circuit board, and circuit board is fixed in the casing, and the electronic circuit on the circuit board is by power circuit A, follower circuit B, and power amplifier C and digital display circuit D form.
Power circuit A mainly is by bridge rectifier Q
1～Q
5, filter capacitor C
15～C
32, integrated stable voltage circuit IC
1～IC
7, resistance R
25～R
28Potentiometer W
4And K switch
8K
9K
10Form Deng components and parts.
Follower circuit B is by integrated circuit (IC)
1Potentiometer W
1, W
2, W
5, resistance R
1～R
5And K
1～K
4Form Deng components and parts.
Amplifying circuit C is by triode T
1, integrated circuit (IC)
2, resistance R
3～R
8, potentiometer W
3, W
6, capacitor C
1, C
2, K switch
6, K
7Form Deng components and parts.
Digital display circuit D is by integrated circuit (IC)
3, IC
4, IC
5, IC
6, charactron, resistance R
9～R
24, capacitor C
3～C
14, potentiometer W
7And K switch
11Form Deng components and parts.
Embodiment:
Instrument and meter for automation prover of the present utility model mainly has two big functions:
1, for providing, the automation instrument calibration stablizes the signal source;
2, provide the precise figures of standard signal to show.
The calibration range of this prover switches by switch to be provided respectively:
The DC current calibration source of 0～19.999mA and 0～25.00mA.
The DC voltage calibration source of 0～19.999mAV and 0～60.00mV.
The direct current potential source of 0～19.999V.
Each range current/voltage source signal of output is directly shown with digital form by charactron.Its principle of work is shown in Figure of description 2,3,4 circuit block diagrams.Concrete using method is identical substantially with existing all kinds of meter provers.
Its technical requirement of robotization instrument prover of the present utility model is as follows:
1, instrument and meter for automation prover of the present utility model belongs to the standard metering instrument that is operated under the metering environment, has performance accurately under this environment, and allows to use under the environmental baseline of industry spot;
2, fundamental error be no more than respectively keep off range ± 0.1%FS;
3, indication mechanism shows with 4 half high precision digital display gauge outfits, and itself error is ± 0.02%FS ± 1 word, shows that charactron is 0.5 o'clock LED pipe, and adjust zero point automatically, maximum demonstration amount ± 19999, auto polarity conversion;
4, load capacity; Load 0～500 Ω when current source is used;
5, long-term stability: exported the drift variation continuously and be no more than 0.05%FS in 4 hours;
7, power supply: 220V50H is no more than 10VA.
Instrument and meter for automation prover of the present utility model compare with prior art have that volume is little, precision is high, numeral shows, has higher level, is the comprehensive substitute products of existing like product, has very high use value.
Shown in the Figure of description 51 is output plughole, the 2nd, power switch, the 3rd, and parameter selection button, the 4th, parameter range selection button, the 5th, panel, the 6th shows selection, 7 variable coarse adjustment buttons, 8 variable fine tuning buttons.
Except that the special card of the described technology of instructions, be known technology.
Claims (5)
1, a kind of instrument and meter for automation prover is characterized in that prover is by power circuit A, follower circuit B, and power amplifier C and digital display circuit D form.
2, prover according to claim 1 is characterized in that power circuit A is by bridge rectifier Q
1～Q
5, filter capacitor C
15～C
32, integrated stable voltage circuit IC
1～IC
7, resistance R
25～R
28, potentiometer W
4And K switch
8K
9K
10Form Deng components and parts.
3, prover according to claim 1 is characterized in that follower circuit B is by integrated circuit (IC)
1, potentiometer W
1W
2W
5, resistance R
1R
2R
4R
5And K switch
1K
2K
3K
4Form Deng components and parts.
4, prover according to claim 1 is characterized in that amplifying circuit C is by triode T
1, integrated circuit (IC)
2, resistance R
3～R
8, potentiometer W
3W
6, capacitor C
1C
2, K switch
6K
7Form Deng components and parts.
5, prover according to claim 1 is characterized in that digital display circuit D is by integrated circuit (IC)
3IC
4IC
5IC
6, charactron, resistance R
9～R
24, capacitor C
3～C
14, potentiometer W
7And K switch
11Form Deng device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93231800 CN2177235Y (en) | 1993-09-09 | 1993-09-09 | Calibrating instrument of automatic metre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93231800 CN2177235Y (en) | 1993-09-09 | 1993-09-09 | Calibrating instrument of automatic metre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2177235Y true CN2177235Y (en) | 1994-09-14 |
Family
ID=33808179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93231800 Expired - Fee Related CN2177235Y (en) | 1993-09-09 | 1993-09-09 | Calibrating instrument of automatic metre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2177235Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344928A (en) * | 2013-07-26 | 2015-02-11 | 北京航天计量测试技术研究所 | Amplifying circuit for raising balance micro torque calibration instrument measurement linearity |
| CN104697669A (en) * | 2015-02-16 | 2015-06-10 | 北京新能源汽车股份有限公司 | Method and device for calibrating temperature collection channel in battery management system |
-
1993
- 1993-09-09 CN CN 93231800 patent/CN2177235Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344928A (en) * | 2013-07-26 | 2015-02-11 | 北京航天计量测试技术研究所 | Amplifying circuit for raising balance micro torque calibration instrument measurement linearity |
| CN104697669A (en) * | 2015-02-16 | 2015-06-10 | 北京新能源汽车股份有限公司 | Method and device for calibrating temperature collection channel in battery management system |
| CN104697669B (en) * | 2015-02-16 | 2018-04-03 | 北京新能源汽车股份有限公司 | To the method and apparatus that temperature acquisition channel is calibrated in battery management system |
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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 |