CN201697729U - Analogue electronic freezing point device - Google Patents
Analogue electronic freezing point device Download PDFInfo
- Publication number
- CN201697729U CN201697729U CN2009201895263U CN200920189526U CN201697729U CN 201697729 U CN201697729 U CN 201697729U CN 2009201895263 U CN2009201895263 U CN 2009201895263U CN 200920189526 U CN200920189526 U CN 200920189526U CN 201697729 U CN201697729 U CN 201697729U
- Authority
- CN
- China
- Prior art keywords
- freezing point
- mercury thermometer
- point device
- temperature
- compensating wire
- 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
Links
Images
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
An analogue electronic freezing point device is characterized in that the front end of a mercury thermometer penetrates through a heat insulating bottle plug to be connected with a heat insulating bottle, insulating liquid media are filled in the heat insulating bottle, a compensation lead and a copper lead are respectively arranged inside the insulating liquid media, one end of the compensation lead is connected with a temperature indicating controller, the other end of the compensation lead is connected with one end of the copper lead, the other end of the copper lead is connected with a direct-current potentiometer via a cold end compensator, and a heat insulating hood is connected to the top end of the mercury thermometer. The analogue electronic freezing point device has the advantages that the device realizes the function of detecting a freezing point groove in a temperature apparatus, saves a large amount of cost, reduces water and electricity consumption of an original ice maker and a freezing point groove into consumption of three AA batteries, shortens time for five steps from around 2 hours originally to currently set five minutes, is remarkable in effects and convenient in manufacturing, and facilitates popularization.
Description
Technical field
The utility model relates to a kind of Freezing point device, relates in particular to a kind of simulation electronic Freezing point device.
Background technology
(record) instrument (hereinafter to be referred as " thermometric instrument ") is regulated in the temperature indication can finish temperature value in indication, control and the continuous recording firing equipment automatically.Therefore at home and abroad pilot production unit is used widely.Be metering temperature instrument value accuracy.According to country's " digital display temperature indication adjusting apparatus " JJG617-1996 and " industrial process survey record instrument " JJG74-2005 measurement verification regulations.In order to obtain 0 ℃ of stable in ice bath temperature, pass through: ice making → trash ice (consuming 15 liters of left and right sides trash ices) → frozen water mixing → compensating wire test tube (in vitro doing the temperature conduction medium) → temperature stabilization of going into to insulate, five steps with transformer oil.Now temperature measurement unit is general adopts artificial hammering method trash ice, and not only efficient is low, labor capacity is big, and be difficult to the frozen water that the method that reaches the freezing point requires and can fully mix " flakes " ice, and the homogeneity of temperature in the gained trash ice particle size effect ice bath.Each calibrating needs 2 many hours working times from trash ice to obtaining 0 ℃ of stable temperature field, and thermometric instrument is examined and determine about 30% of the used time.The domestic thermometric instrument of investigation discovery is with the reference junction temperature automatic compensation function more than 90%, so be necessary to improve now using Freezing point device.
Summary of the invention
The purpose of this utility model is to provide a kind of simulation electronic Freezing point device, and this simulation electronic Freezing point device makes things convenient for the thermometric instrument metering for simplifying ice making → trash ice → frozen water mixing link, improves the reliability that detects data simultaneously.According to " cryoscopic method " effect in thermometric instrument calibrating: 1. 2. temperature stabilization is given tested thermometric instrument input end, the reverse compensation thermoelectrical potential value between room temperature to 0 ℃ is provided.
The utility model is achieved like this, it comprises mercury thermometer, plug for vacuum bottle, thermos, the iknsulating liquid medium, compensating wire, copper conductor, temperature indication regulation meter, junction compensator, DC potentiometer, stay-warm case, it is characterized in that the mercury thermometer front end passes plug for vacuum bottle and connects thermos, the iknsulating liquid medium is housed in the thermos, be respectively equipped with compensating wire and copper conductor in the iknsulating liquid medium, one end of compensating wire connects temperature indication regulation meter, the compensating wire other end connects an end of copper conductor, the copper conductor other end connects DC potentiometer by junction compensator, and the mercury thermometer top is connected with stay-warm case.
Thermos described in the utility model can be replaced by the portable type heat insulating water bottle.
The liquid level of iknsulating liquid medium described in the utility model should be in the plug for vacuum bottle bottom.
Mercury thermometer described in the utility model adopts 0.1 calibration mercury thermometer or 0.2 calibration mercury thermometer.
Compensating wire described in the utility model adopts and temperature indicates regulation meter with calibration number.
Technique effect of the present utility model is: reached the effect of Freezing point device in the thermometric instrument calibrating, save great amount of cost, the consumption of three joint No.5 cells is reduced in the water power consumption of former ice machine, ice bath, former each ice making → trash ice (being broken into flakes) → frozen water mixing → compensating wire is gone into insulating sleeve (dress medium oil in the pipe) → temperature stabilization, required 2 hours of five processes, be reduced to existing setting-up time five minutes, economic effect is obvious.Easy to make, and be convenient to popularize.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the schematic diagram of the utility model junction compensator.
Mercury thermometer 2, plug for vacuum bottle 3, thermos 4, iknsulating liquid medium 5, compensating wire 6, copper conductor 7, temperature indication regulation meter 8, junction compensator 9, DC potentiometer 10, stay-warm case in the drawings, 1.
Embodiment
As shown in Figure 1, the utility model is achieved like this, it comprises mercury thermometer 1, plug for vacuum bottle 2, thermos 3, iknsulating liquid medium 4, compensating wire 5, copper conductor 6, temperature indication regulation meter 7, junction compensator 8, DC potentiometer 9, stay-warm case 10, it is characterized in that mercury thermometer 1 front end passes plug for vacuum bottle 2 and connects thermos 3, iknsulating liquid medium 4 is housed in the thermos 3, be respectively equipped with compensating wire 5 and copper conductor 6 in the iknsulating liquid medium 4, one end of compensating wire 5 connects temperature indication regulation meter 7, compensating wire 5 other ends connect an end of copper conductor 6, copper conductor 6 other ends connect DC potentiometer 9 by junction compensator 8, and mercury thermometer 1 top is connected with stay-warm case 10.Be used in the closed container that vacuumizes between the layer glass of innner and outer, greater than the liquid of a certain amount of (more than 500 milliliters), when container innner and outer temperature differed in 3 ℃, conduction of heat was very little between the container inside and outside.So liquid medium temperature is metastable in the long period section inner pressurd vessel relatively, plays the effect of equilibrium temperature.In the actual measurement sample liquid medium temperature fluctuation less than per hour 0.06 ℃ satisfy relevant measurement verification regulations.0.05 grade of UJ33a type of class of accuracy " Portable DC potentiometer " that " DC potentiometer " can adopt Shanghai electrical instrument factory to produce.Connect copper conductor and all intercept on same copper conductor, can reduce the influence of contact electricity.The effect of thermometer stay-warm case: blocking-up through the heat of mercury thermometer conduction with stable bottle in fluid temperature.
As shown in Figure 2, for the stabilizing circuit working point.Resistance R among the figure
1, R
2, R
4, R
6Adopt the noninductive coiling of manganese-copper filament two-wire to form.Because stabilivolt TL431 also has good temperature stabilization performance, triode BG
1, BG
2Connect into and penetrate grade follower circuit and resistance value R
6+ R
7＞＞R
1+ R
2, form strong negative feedback and stablized the circuit working point, guarantee resistance R
1, R
2The stability of two ends output potential is surveyed this junction compensator, 6 hours output potential undulating quantitys of continuous working less than ± 3 μ V.
Potentiometer R
5Effect be: be longer than more than one hour when a service time, in the bottle fluctuation of fluid temperature as greater than 0.1 ℃ the time, available R
5Revise.For example: during calibrating K type thermometric instrument, in verification process, fluid temperature rises 0.1 ℃ the time in the thermos, and the partial heat potential value is 40 μ V/ ℃, 0.1 ℃ during according to " 90 international temperature scale " 20 ℃ only needs to heighten 4 μ V to knob to positive dirction and get final product, otherwise turns down corresponding potential value.
Potentiometer R
7Effect be: regulate R
7Make junction compensator output potential value equal the corresponding thermoelectrical potential value of mercury thermometer indicating value temperature.For example: during calibrating K type thermometric instrument, the indicating value of mercury thermometer is 22 ℃.Looking into " 90 international temperature scale " corresponding thermoelectrical potential value is 0.879mv, regulates R
7Make junction compensator+,-end output 0.879mv is by in the serial-connection system shown in Figure 1, can play the effect of reverse compensation thermoelectrical potential.
Now with calibrating K type calibration number, 0 ℃～800 ℃ of temperature ranges, resolution are that 0.1 ℃, the XTA-7411 type digital display thermometric instrument error of indication are the explanation that example is carried out using method.During use, airtight bottle stopper, the compensating wire positive and negative electrode on request, be connected on the positive and negative input terminal of tested thermometric instrument, the copper conductor positive pole is connected on DC potentiometer UJ33a " the unknown " and rectifies the utmost point, after reading the indicating value of " mercury thermometer ", package thermometer, adjust " junction compensator " and make its output potential value equal the corresponding thermoelectrical potential value of indicating value temperature of " mercury thermometer " with stay-warm case.When accuracy requirement is higher, also can revise together the error of indication of thermometer and the compensating error of compensating wire simultaneously, " junction compensator " output valve equals revised thermoelectrical potential value at this moment.
Junction compensator is pressed in the place in circuit shown in Figure 1, the electrical null position of calibration criterion DC potentiometer UJ33a, and the cautious standard thermoelectrical potential value of each quilt of pointwise output, for example: when detecting 400 ℃ of these point tolerances with input " standard electrode potential method ", only need to export 16.397mV with UJ33a, read the indicating value of thermometric instrument simultaneously, when positive and negative stroke was 400.6 ℃, the error of this test point was 400.6-400.0=0.6 ℃.In like manner other is detected, chosen wherein maximum error, as this instrument indication value error.All the other are identical when examining and determine with cryoscopic method.
Claims (5)
1. simulation electronic Freezing point device, it comprises mercury thermometer, plug for vacuum bottle, thermos, the iknsulating liquid medium, compensating wire, copper conductor, temperature indication regulation meter, junction compensator, DC potentiometer, stay-warm case, it is characterized in that the mercury thermometer front end passes plug for vacuum bottle and connects thermos, the iknsulating liquid medium is housed in the thermos, be respectively equipped with compensating wire and copper conductor in the iknsulating liquid medium, one end of compensating wire connects temperature indication regulation meter, the compensating wire other end connects an end of copper conductor, the copper conductor other end connects DC potentiometer by junction compensator, and the mercury thermometer top is connected with stay-warm case.
2. simulation electronic Freezing point device according to claim 1 is characterized in that described thermos can be replaced by the portable type heat insulating water bottle.
3. simulation electronic Freezing point device according to claim 1 is characterized in that the liquid level of described iknsulating liquid medium is answered the plug for vacuum bottle bottom.
4. simulation electronic Freezing point device according to claim 1 is characterized in that described mercury thermometer adopts 0.1 calibration mercury thermometer or 0.2 calibration mercury thermometer.
5. simulation electronic Freezing point device according to claim 1 is characterized in that described compensating wire adopts and temperature indicates regulation meter with calibration number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201895263U CN201697729U (en) | 2009-10-21 | 2009-10-21 | Analogue electronic freezing point device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201895263U CN201697729U (en) | 2009-10-21 | 2009-10-21 | Analogue electronic freezing point device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201697729U true CN201697729U (en) | 2011-01-05 |
Family
ID=43398977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201895263U Expired - Fee Related CN201697729U (en) | 2009-10-21 | 2009-10-21 | Analogue electronic freezing point device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201697729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389224A (en) * | 2017-08-04 | 2017-11-24 | 深圳市华星光电技术有限公司 | For thermocouple cold junction freezing point compensation device |
-
2009
- 2009-10-21 CN CN2009201895263U patent/CN201697729U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389224A (en) * | 2017-08-04 | 2017-11-24 | 深圳市华星光电技术有限公司 | For thermocouple cold junction freezing point compensation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202794074U (en) | High temperature superconduction temperature transition measuring device based upon cryogenic refrigerator | |
| CN105588958A (en) | Rapid multifunctional electronic component temperature characteristic measuring instrument and testing cavity | |
| CN102507725A (en) | Measuring device and measuring method of superconductive AC magnetic susceptibility | |
| CN203310480U (en) | Two-line three-capacitor sensor liquid level meter | |
| CN109270116B (en) | Combined test method for measuring suction and thermal conductivity of unsaturated soil matrix | |
| CN104597340B (en) | Low-temperature electrical characteristics testing device for air | |
| CN203853061U (en) | Full-automatic standard gas preparation device | |
| CN201193963Y (en) | Mining temperature sensor calibrating apparatus | |
| CN201590181U (en) | Self-adapting controllable constant-temperature heat source | |
| CN201697729U (en) | Analogue electronic freezing point device | |
| CN102331444B (en) | Device for automatically testing aging performance and thermal time constant of thermistor | |
| CN101936704A (en) | Analog detecting method for concrete grown volume deformation and device thereof | |
| CN101788512A (en) | Device and method for measuring heat effect of magnetic material in alternating magnetic field | |
| CN202814900U (en) | Adiabatic calorimetry testing device for thermophysical parameter of bituminous mixture | |
| CN202563029U (en) | Electrical performance and temperature characteristic testing device for multi-station electronic material | |
| CN201885849U (en) | Thermostatically-controlled pressure detecting structure | |
| CN103668223A (en) | Long-term low-temperature testing device for electrochemical performance of sacrificial anode | |
| CN103267780A (en) | Constant-temperature device for testing electrolyte | |
| CN109268679A (en) | Weight method filling device for Mixed gas insulation high-voltage electrical equipment | |
| CN202938847U (en) | Oiled paper capacitive sleeve capacitor core vacuum drying endpoint monitoring system | |
| CN101738271B (en) | Calibration method of low-temperature temperature element | |
| CN201063027Y (en) | Instrument for measuring heat offusion of ice | |
| CN206192927U (en) | A heat sink that is used for high low temperature experiment test system | |
| CN202928972U (en) | Softening point test system assembly | |
| CN108170193A (en) | A kind of output adjusting method and system of the power supply board of display device |
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: 20110105 Termination date: 20171021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |