Thermocouple Automatic Verificating Device Based on Virtual Instrument Technology

Jing Hui Zhao; Bing Zhou

doi:10.4028/www.scientific.net/AMM.303-306.588

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 303-306Thermocouple Automatic Verificating Device Based...

Thermocouple Automatic Verificating Device Based on Virtual Instrument Technology

Abstract:

The thermocouple automatic verification device is constructed of Advantech PCI-1716 bus data transmission automatic calibration multi-function data acquisition card, USB-4718 eight-channel thermocouple input module, JKH-C series SCR phase-shift trigger, PC machine as hardware and the U.S. National Instruments (NI)Labview as software development platform. According to temperature test point determined by thermocouple verification regulation, the device controls the temperature of calibration furnace, acquires the standard and the thermocouple millivolt values automatically and calculates the error at each testing point in line with its measurement data processing formula, realizing the functions such as visual operation interface, test data saving and verification certificate printing. Device accuracy: potential measurement error is no more than 0.005. Resolution: potential is 0.01μV. Temperature control accuracy: error deviating the test temperature is no more than ±5°C when testing it. Temperature stability: the constant change is no more than 0.2°C/min in its testing process. The thermocouple calibration uncertainty is better than 0.7°C and the repeatability error is less than 0.25°C.

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Periodical:

Applied Mechanics and Materials (Volumes 303-306)

Pages:

588-596

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.303-306.588

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Online since:

February 2013

Authors:

Jing Hui Zhao, Bing Zhou

Keywords:

Thermocouple, Verification Device, Virtual Instrument Technology

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References

[1] Methods for measuring the thermoelectric force of noble metal and base metal thermocouple wires, GB/T 16701-2010, China National Standardization Management Committee (CNSMC). 2011. In chinese.

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[2] Calibration specification for auto-measuring system of thermocouples and resistance thermometers , JJF 1098-2003, State Administration for Quality Supervision and Inspection and Quarantine (AQSIQ), 2003. In chinese.

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[3] Information on http: /www. advantech. com/eA.

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[4] Information on http: /www. ni. com/china/labview.

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