Numerical estimate of the temperature measurement errors of a platinum resistance thermometer

1974 ◽  
Vol 17 (10) ◽  
pp. 1548-1551
Author(s):  
A. M. Sirota ◽  
A. Ya. Grishkov ◽  
I. I. Gol'dshtein
Keyword(s):  
Temperature Measurement ◽  
Measurement Errors ◽  
Numerical Estimate ◽  
Platinum Resistance Thermometer ◽  
Platinum Resistance ◽  
Resistance Thermometer

scholarly journals EFFECTS OF VARIATION IN MEASUREMENT CHAIN ON TEMPERATURE MEASUREMENT CALIBRATION WITH RESISTANT TEMPERATURE SENSORS

2019 ◽  
Vol 19 (3) ◽  
pp. 57-66
Author(s):  
Jessica DEUTSCH ◽  
Mirko RIEDEL ◽  
Jens MÜLLER ◽  
Steffen IHLENFELDT
Keyword(s):  
Temperature Measurement ◽  
Temperature Sensors ◽  
Platinum Resistance Thermometer ◽  
Platinum Resistance ◽  
Temperature Calibration ◽  
Resistance Thermometer ◽  
Temperature Calibrator ◽  
Industrial Platinum Resistance Thermometer ◽  
Set Up ◽  
Key Parameter

Temperature is one of the most important key parameter to consider in measurement and mechanical engineering, because every measurement has to be conducted with reference to standard temperature conditions (20 °C, ISO 1). Strictly speaking, almost every measurement depends on the accuracy of the temperature measurement, which requires proper calibration. Therefore, standards list detailed criteria to fulfil temperature calibration with high precision. In fact, any calibration is only valid, if the whole measurement chain is taken into account. This would make recalibration necessary with each variation of the components in the measuring set-up (varying cable length, different measurement channel etc.), which is time-consuming or even impossible in practice. For that reason, this paper presents a practicable calibration strategy, which specifies each component individually and later combines the calibration results according to the composition of the measurement chain. This provides a fast and useful way to achieve the required accuracy of temperature measurement. The examined, exemplary measurement chain consists of an industrial platinum resistance thermometer (IPRT), cables with different lengths, an electrical amplifier and a reference temperature calibrator.

HYDROGEN PEROXIDE AND ITS ANALOGUES: II. PHASE EQUILIBRIUM IN THE SYSTEM HYDROGEN PEROXIDE – WATER

1951 ◽  
Vol 29 (2) ◽  
pp. 123-132 ◽  
Author(s):  
William T. Foley ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Equilibrium ◽  
Solid Solutions ◽  
Freezing Point ◽  
Platinum Resistance Thermometer ◽  
Platinum Resistance ◽  
Radioactive Tracers ◽  
Resistance Thermometer ◽  
Pure Solution

A precision freezing point apparatus with platinum resistance thermometer was used to investigate the system hydrogen peroxide – water over the whole concentration range. The freezing point of the purest sample of hydrogen peroxide obtained by repeated fractional crystallizations of a large quantity of 99.6% pure solution was found to be −0.461°C; that of the dihydrate was −52.10°C. The two eutectics occur at concentrations of 45.2% and 61.2% H2O2 and at temperatures of −52.4° and −56.5°C. respectively. Contrary to what has been reported previously, water and hydrogen peroxide do not form solid solutions together. This was proved conclusively by applying the technique of radioactive tracers to the 'wet residue' method of Schreinemakers.

A Low-Noise Thermistor Bridge for Use in Calorimetry

1974 ◽  
Vol 20 (8) ◽  
pp. 1009-1012 ◽  
Author(s):  
Robert L Berger ◽  
Walter S Friauf ◽  
Horace E Cascio
Keyword(s):  
High Speed ◽  
Platinum Resistance Thermometer ◽  
Low Noise ◽  
Platinum Resistance ◽  
Resistance Thermometer ◽  
Thermistor Bridge ◽  
Flow Calorimeter ◽  
Titration Calorimeter ◽  
Lock In

Abstract A precision thermistor bridge and thermistor is described for use in a thermal titration calorimeter or a high-speed stopped- or continuous-flow calorimeter of the Roughton type. These are compared and evaluated with regard to several other types of detectors, including the platinum resistance thermometer, thermocouple, transistor thermometer, and capacitance thermometers. At this time the best detection for our purpose seems to be a specially constructed 20-100 kΩ thermistor used in conjunction with a new ac lock-in amplifier bridge. The sensitivity of the system is equivalent to a peak-to-peak noise of 25 x 10-6 °C, with a 100-ms time constant and 1 µW power dissipation in the thermistor. Long-term drift of the bridge, without an oven, was 1 x 10-6 °C/min.

Sign in / Sign up

Export Citation Format

Share Document