Development of Multi-Point Thermostatic Standard Device for Portable Acidity Meter Calibration

LI Ming; ZHANG Wen; LIU Ying

doi:10.12338/j.issn.2096-9015.2020.0275

Volume 65 Issue 9

Sep. 2021

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LI Ming, ZHANG Wen, LIU Ying. Development of Multi-Point Thermostatic Standard Device for Portable Acidity Meter Calibration[J]. Metrology Science and Technology, 2021, 65(9): 61-65. doi: 10.12338/j.issn.2096-9015.2020.0275

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LI Ming, ZHANG Wen, LIU Ying. Development of Multi-Point Thermostatic Standard Device for Portable Acidity Meter Calibration[J]. Metrology Science and Technology, 2021, 65(9): 61-65. doi: 10.12338/j.issn.2096-9015.2020.0275

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Development of Multi-Point Thermostatic Standard Device for Portable Acidity Meter Calibration

doi: 10.12338/j.issn.2096-9015.2020.0275

LI Ming^{1, 2
,},
ZHANG Wen^{1, 2},
LIU Ying^{1, 2}

1.
Chongqing Institute of Metrology and Quality Inspection, Chongqing 401123, China
2.
National Center for Quality Supervision and Inspection of Thermal Flow Meters, Chongqing 401123, China

Available Online: 2021-07-21
Publish Date: 2021-09-01

Abstract

Abstract

In the verification of the acidity meter, it is required to verify the indication error of standard solution measurement and that caused by temperature compensation in a constant temperature environment. To avoid the low verification efficiency caused by the repeated heating and cooling of the traditional thermostatic cell, and to realize the rapid on-site verification, this project has developed a multi-point thermostat standard device based on the principle of independent thermostat control of small volume and multi-unit, using semiconductor chilling technology and PTC heating technology with PID digital adjustment technology, which is light in weight and can provide multiple thermostat standards simultaneously. The temperature uniformity of the device is less than ±0.1 ℃ and the temperature fluctuation is not more than 0.2 ℃, which can meet the needs of acidity meter field test or calibration.
- multi-point constant thermostatic,
- independent thermostatic unit,
- semiconductor chilling,
- PTC heating,
- standard device

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References(15)

References

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