CN205176246U - Conductivity meter self -calibration system - Google Patents
Conductivity meter self -calibration system Download PDFInfo
- Publication number
- CN205176246U CN205176246U CN201520975010.7U CN201520975010U CN205176246U CN 205176246 U CN205176246 U CN 205176246U CN 201520975010 U CN201520975010 U CN 201520975010U CN 205176246 U CN205176246 U CN 205176246U
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- China
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- conductivity meter
- resistance
- calibration system
- wireless transceiver
- intellect
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Abstract
The utility model provides a conductivity meter self -calibration system includes the thermostated container, be provided with in the thermostated container by calibration conductivity meter, intelligent resistor, singlechip controller, wireless transceiver, wireless transceiver controller, PC, wherein: singlechip controller is connected with intelligent resistor, and intelligent resistor is connected with quilt calibration conductivity meter, and singlechip controller passes through wireless transceiver, wireless transceiver controller is connected with the PC, and the PC passes through the USB communication and is connected by the calibration conductivity meter. The utility model discloses an advantage: conductivity meter self -calibration system can realize to the conductivity meter self -calibration that the simple easily operation of calibration process has certain practicality.
Description
Technical field
The utility model relates to gauge check technical field, has particularly related to a kind of conductivity meter automated calibration system.
Background technology
Along with modern science and technology and industrial expansion, the application of pure water and ultrapure water gets more and more, and water treatment system is also corresponding to be increased on a large scale.In the process of water treatment, online conductivity meter is used for monitoring the conductivity value of aqueous solution in Real-time Water system at large, to guarantee the needs that water quality reaches life, produces and study.At present, kind and the model of the online conductivity meter applied in fields such as medicine, food, chemical industry and semiconductor manufacturing are a lot, its metering performance will directly affect the quality of pure water or ultrapure water, and then remote effect are to the quality of product, is also necessary greatly so carry out automatic calibration to conductivity meter.
Traditional conductivity meter calibrating installation uses precision resistance case, and precision resistance case generally adopts copper-manganese resistance wire to turn to many fixed resistances, then with rotary switch selection combination wherein, to obtain required resistance value.Although its accuracy is higher, volume is comparatively large, does not particularly possess digital interface, is difficult to be connected to be applied to automatic checkout system with computing machine.
Summary of the invention
The purpose of this utility model is that the applying unit for conductivity meter provides measurement data accurately by carrying out automatic calibration to conductivity meter, and spy provides a kind of conductivity meter automated calibration system.
The utility model provides a kind of conductivity meter automated calibration system, it is characterized in that: described conductivity meter automated calibration system comprises constant temperature oven 1, be provided with in described constant temperature oven 1 and be calibrated conductivity meter 2, Intellect resistance 3, singlechip controller 4, wireless transceiver 5, wireless receiving and dispatching controller 6, PC 7; Wherein: singlechip controller 4 is connected with Intellect resistance 3, Intellect resistance 3 be calibrated conductivity meter 2 and be connected, singlechip controller 4 is connected with PC 7 by wireless transceiver 5, wireless receiving and dispatching controller 6, PC 7 by USB communication be calibrated conductivity meter 2 and be connected.
As preferred technical scheme, described constant temperature oven 1 front end is provided with transparency window, and the temperature regulating range of described constant temperature oven 1 is (20 scholar 2) DEG C.
As preferred technical scheme, described Intellect resistance 3 comprises active resistance, D/A converter, programmable amplifier, isolated amplifier, AD converter.
As preferred technical scheme, described wireless transceiver 5 adopts nRF401 radio transmitting and receiving chip, and its frequency of operation is 433MHz.
Advantage of the present utility model:
Conductivity meter automated calibration system described in the utility model can realize conductivity meter automatic calibration, and calibration process is simply easy to operation, has certain practicality.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the utility model is described in further detail:
Fig. 1 is a kind of conductivity meter automated calibration system theory structure schematic diagram.
Embodiment
When calibrating conductivity meter, " intelligent electric resistance " is used to calibrate." standard resistance box " numerical value relatively " standard solution " has more stable reliability and accuracy.Like this, just detected solution can be replaced by standard electric resistance.The resistance value of " standard solution " is obtained from the standard electric resistance of resistance box.Obtain surveying indicated value from the display of conductivity meter, thus judge that whether the indicated value of tested conductivity meter is correct.
Due to the error of indication of the resistive element that variation of ambient temperature causes, by control gauge range request, in the range of temperature that environment temperature is (20 scholar 2) DEG C, the error of indication that resistive element may cause is less, will be calibrated in constant temperature oven 1 that conductivity meter 2 is placed on transparency window together with calibrating installation successively.
In order to intelligent, auto-calibration, determine to make full use of digital circuit and mimic channel advantage separately, utilize the controlling functions that single-chip microcomputer is powerful, employing AT89C51 singlechip controller 4 is the practical Intelligent electric electrical conductivity instrument automated calibration system of core design one.Get a conductivity meter electrode wires, electrode wires is taken apart, receive on two terminals of Intellect resistance 3 with heart yearn and shielding line, singlechip controller 4 is connected with Intellect resistance 3, and Intellect resistance 3 comprises active resistance, programmable amplifier, AD converter, isolated amplifier.Singlechip controller 4 can distribute enlargement factor at different levels automatically according to the size of input signal, is amplified by programmable amplifier, and the output voltage after amplification controls its attenuation multiple by AD converter, then completes the synthesis of active resistance through isolated amplifier.Achieve singlechip controller 4 like this to control to export suitable resistance, and this resistance value is exported to be calibrated conductivity meter 2, be calibrated conductivity meter 2 to be connected with PC 7 by USB communication simultaneously, achieve PC 7 and the communication being calibrated conductivity meter 2, PC 7 can read the resistance value being calibrated conductivity meter 2, singlechip controller 4 is connected with wireless transceiver 5, wireless transceiver 5 is connected with PC 7 by wireless receiving and dispatching controller 6 simultaneously, wireless transceiver 5 adopts nRF401 radio transmitting and receiving chip, its frequency of operation is 433MHz, the wireless telecommunications of singlechip controller 4 and PC 7 are achieved by the use of wireless transceiver 5, this system just can carry out automatic calibration to conductivity meter.
Claims (4)
1. a conductivity meter automated calibration system, it is characterized in that: described conductivity meter automated calibration system comprises constant temperature oven (1), be provided with in described constant temperature oven (1) and be calibrated conductivity meter (2), Intellect resistance (3), singlechip controller (4), wireless transceiver (5), wireless receiving and dispatching controller (6), PC (7); Wherein: singlechip controller (4) is connected with Intellect resistance (3), Intellect resistance (3) be calibrated conductivity meter (2) and be connected, singlechip controller (4) is connected with PC (7) by wireless transceiver (5), wireless receiving and dispatching controller (6), PC (7) by USB communication be calibrated conductivity meter (2) and be connected.
2. conductivity meter automated calibration system according to claim 1, it is characterized in that: described constant temperature oven (1) front end is provided with transparency window, the temperature regulating range of described constant temperature oven (1) is (20 scholar 2) DEG C.
3. conductivity meter automated calibration system according to claim 1, is characterized in that: described Intellect resistance (3) comprises active resistance, D/A converter, programmable amplifier, isolated amplifier, AD converter.
4. conductivity meter automated calibration system according to claim 1, is characterized in that: described wireless transceiver (5) adopts nRF401 radio transmitting and receiving chip, and its frequency of operation is 433MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975010.7U CN205176246U (en) | 2015-12-01 | 2015-12-01 | Conductivity meter self -calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520975010.7U CN205176246U (en) | 2015-12-01 | 2015-12-01 | Conductivity meter self -calibration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205176246U true CN205176246U (en) | 2016-04-20 |
Family
ID=55740222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520975010.7U Expired - Fee Related CN205176246U (en) | 2015-12-01 | 2015-12-01 | Conductivity meter self -calibration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205176246U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405461A (en) * | 2016-08-26 | 2017-02-15 | 江苏华伦化工有限公司 | Conductivity instrument verification method |
| CN113295196A (en) * | 2021-05-28 | 2021-08-24 | 东华大学 | Three-in-one device for filtering equipment and calibration method thereof |
-
2015
- 2015-12-01 CN CN201520975010.7U patent/CN205176246U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405461A (en) * | 2016-08-26 | 2017-02-15 | 江苏华伦化工有限公司 | Conductivity instrument verification method |
| CN113295196A (en) * | 2021-05-28 | 2021-08-24 | 东华大学 | Three-in-one device for filtering equipment and calibration method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20161201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |