CN201497733U - Temperature measuring instrument for chromatograph column boxes - Google Patents
Temperature measuring instrument for chromatograph column boxes Download PDFInfo
- Publication number
- CN201497733U CN201497733U CN2009200273770U CN200920027377U CN201497733U CN 201497733 U CN201497733 U CN 201497733U CN 2009200273770 U CN2009200273770 U CN 2009200273770U CN 200920027377 U CN200920027377 U CN 200920027377U CN 201497733 U CN201497733 U CN 201497733U
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- temperature
- temperature sensor
- machine box
- measuring instrument
- data processing
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Abstract
A temperature measuring instrument for chromatograph column boxes comprises a machine box (1); a temperature sensor socket (2), a display screen (3), a function selection button (4), a switch button (5) and a temperature sensor (6) are arranged on the machine box (1); a hardware system and a power supply are arranged in the machine box; the hardware system comprises a temperature collection system, and a data processing and display system; the temperature collection system, and the data processing and display system are controlled by a singlechip; the temperature collection system comprises the temperature sensor (6), a constant-current source circuit, a signal amplification circuit and an A/D converting circuit; the temperature sensor collects and processes temperature information under the control of the singlechip; a temperature collection and data processing system is pre-arranged in the singlechip, so as to conduct automatic detection and measurement on temperature stability and process heat repeatability of the chromatograph column box, and displays and stores data; a bracket (7) is also arranged on the back side of the machine box; and the temperature sensor can be equipped with an electric heating plug. The utility model has the advantages of simple structure, convenient operation, high measuring accuracy, wide temperature application range, high automation degree, small size, light weight, and low power consumption, can remarkably improve work efficiency, and is particularly suitable for on-site detection.
Description
One, technical field
The utility model belongs to the metrological testing technology field, relates to the temperature metering test technical field.
Two, background technology
Gas chromatograph is to utilize each component in the sample, and the gas phase in chromatographic column is different with distribution and adsorption coefficient between stationary phase, by carrier gas the sample after gas sample and the vaporization is brought in the chromatographic column and separated, and the instrument that detects by detecting device.Retention time and response according to each component are carried out qualitative, quantitative test.Instrument is made up of air-channel system, sampling system, chromatographic column, electrical system, monitoring system, register or data handling system.
Wherein the stability of chromatograph box temperature, temperature programme repeatability all have bigger influence to qualitative, the quantitative test and the detection sensitivity of the retention time of each component in the gas chromatograph testing process and response.Therefore need regularly or aperiodically stability, the temperature programme repeatability of chromatograph box temperature to be examined and determine, to determine that it is within normal range of operation.Present most measurement verification department is when carrying out chromatograph post oven temperature, degree stability, the calibrating of temperature programme repeatability, use the platinum sensor thermometric, have even needs measurement platinum resistance resistance is tabled look-up and is converted to temperature, adopt manual time-keeping, hand-kept measurement data and calculating verification result, the verification process complex operation, the computational data amount is big, inefficiency is a problem demanding prompt solution in the chromatograph post oven temperature, degree verification process.
Aspect country's disclosed gas chromatograph post oven temperature, degree calibrating installation, do not see the pertinent literature report.
Three, summary of the invention
The purpose of this utility model is to provide a kind of can carry out the instrument that automatic Verification is measured to stability, the temperature programme repeatability of gas chromatograph post oven temperature, degree, to improve gas chromatograph assay calibration efficient.
The purpose of this utility model is to realize like this, adopt platinum resistance temperature sensor, constant-current source circuit, signal amplification circuit, high-precision A/D change-over circuit to form the precision temperature measuring system, by Single-chip Controlling, storage and video data after the single-chip microcomputer digital filtering is handled.
The chromatograph post oven temperature, degree measuring instrument that the utility model relates to, comprise machine box 1, temperature sensor socket 2, display screen 3, function selecting button 4, shift knob 5 and temperature sensor 6 are set on the machine box, (contour structures as shown in Figure 1, hardware block diagram is as shown in Figure 2), hardware system and power supply are set in the machine box; Hardware system is made up of monolithic processor controlled temperature acquisition system, data processing and display system.Temperature acquisition system is made up of the accurate platinum resistance temperature sensor 6 of four-wire system, constant-current source circuit, signal amplification circuit, A/D change-over circuit, under Single-chip Controlling by temperature sensor collection and process temperature information, preset temperature collection and data handling system in the single-chip microcomputer show and the storage data.
The chromatograph post oven temperature, degree measuring instrument that the utility model relates to, described sensor socket is the four-core aviation plug.
The chamber temperature and humidity measurement instrument that the utility model relates to, the machine box back side also has support 7.
The chamber temperature and humidity measurement instrument that the utility model relates to is simple in structure, easy to operate, measuring accuracy and Applicable temperature scope designability are strong, stability, temperature programme repeatability with temperature are carried out the automatic Verification function, automatically show and the storage data, can effectively shorten the calibration operation time one time, significantly improve work efficiency.Temperature sensor can charged hot plug.
The chamber temperature and humidity measurement instrument volume that the utility model relates to is little, in light weight, desk-top portable dual-purpose, and the powered battery dispense with outer connecting power, low in energy consumption, be easy to carry, be specially adapted to on-site proving.
Four, description of drawings
Accompanying drawing 1 chromatograph post oven temperature, degree measuring instrument shape assumption diagram
Accompanying drawing 2 chromatograph post oven temperature, degree measuring instrument hardware catenation principle block diagrams
3 one kinds of chromatograph posts of accompanying drawing oven temperature, degree measuring instrument structural representation
4 one kinds of chromatograph posts of accompanying drawing oven temperature, degree measuring instrument software workflow figure
1---the machine box, 2---the temperature sensor socket, 3---display screen, 4---the function selecting button, 5---shift knob, 6---temperature sensor, 7---support
Five, specific embodiments
Below in conjunction with accompanying drawing the chromatograph post oven temperature, degree measuring instrument that the utility model relates to is described in further detail, but not as the restriction that the utility model is related to technical scheme.
Embodiment one
A kind of chromatograph post oven temperature, degree measuring instrument, structural representation as shown in Figure 3, the measuring instrument software workflow is as shown in Figure 4.
Temperature collection circuit is amplified by PT100 platinum resistance temperature sensor, REF200 constant current source, AD7705 signal and high-precision A/D conversion chip is formed.Temperature sensor is by the four-core aviation plug, the temperature sensor measurement pin is connected with the AD7705 signal input part, the current excitation pin is connected with REF200 constant current source output terminal, amplify and high-precision A/D conversion, AD7705 output signal pin is connected to P1.0, P1.1, P1.2, the P1.3 mouth of main control singlechip AT89C55WD, handles the back storage by the single-chip microcomputer digital filtering.
Show and adopt the OCMJ4X8 Liquid Crystal Module, work in serial mode, be connected with single-chip microcomputer by P1.4, P1.5, P1.6 mouth, keyboard uses free-standing keyboard, by P2.2, P2.3, P2.4, four function keys of P2.5 mouth control, constitutes the complete circuit system.The entire circuit system layout also is fixed in the machine box 1.
The chromatograph post oven temperature, degree measuring instrument that present embodiment provides, temperature measurement range-50 ℃～200 ℃, measuring error is not more than 0.05 ℃; When being operated in chromatograph post oven temperature, degree calibrating state, it is 50 ℃～200 ℃ by the programed temperature measurement range.
After the start, instrument carries out system initialization under Single-chip Controlling, shows information such as manufacturer's instrument model and numbering, shows the actual temperature measured value, if socket does not connect temperature sensor, shows not connect "---" sign.Select by keyboard, can enter different calibrating modes, carry out the calibrating of the projects such as stability, temperature programme repeatability of chromatograph post oven temperature, degree automatically.
Claims (3)
1. chromatograph post oven temperature, degree measuring instrument, it is characterized in that: comprise machine box (1), temperature sensor socket (2) is set on the machine box, display screen (3), function selecting button (4), shift knob (5) and temperature sensor (6), hardware system and power supply are set in the machine box; Hardware system is made up of monolithic processor controlled temperature acquisition system, data processing and display system; Temperature acquisition system is made up of the accurate platinum resistance temperature sensor (6) of four-wire system, constant-current source circuit, signal amplification circuit, A/D change-over circuit, under Single-chip Controlling by temperature sensor collection and process temperature information, preset temperature collection and data handling system in the single-chip microcomputer show and the storage data.
2. the described chromatograph post of claim 1 oven temperature, degree measuring instrument, it is characterized in that: described sensor socket is the four-core aviation plug.
3. the described chromatograph post of claim 1 oven temperature, degree measuring instrument, it is characterized in that: the machine box back side also has support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200273770U CN201497733U (en) | 2009-06-10 | 2009-06-10 | Temperature measuring instrument for chromatograph column boxes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200273770U CN201497733U (en) | 2009-06-10 | 2009-06-10 | Temperature measuring instrument for chromatograph column boxes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201497733U true CN201497733U (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200273770U Expired - Fee Related CN201497733U (en) | 2009-06-10 | 2009-06-10 | Temperature measuring instrument for chromatograph column boxes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201497733U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527226A (en) * | 2022-02-23 | 2022-05-24 | 上海天美科学仪器有限公司 | Variable temperature protector for gas chromatograph column box |
-
2009
- 2009-06-10 CN CN2009200273770U patent/CN201497733U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114527226A (en) * | 2022-02-23 | 2022-05-24 | 上海天美科学仪器有限公司 | Variable temperature protector for gas chromatograph column box |
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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: 20100602 Termination date: 20170610 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |