Standard Practice for Determination of Minimum Immersion Depth and Assessment of Temperature Sensor Measurement Drift

Importancia y uso:

5.1 This practice provides a means for the users of ASTM Committee D02 standards to monitor the drift in sensed temperature of liquid-in-glass thermometer (LiG), and digital contact thermometers (DCT). Digital contact thermometers are sometimes referred to as portable electronic thermometers (PET) or simply digital thermometers.

5.2 This practice is not suitable for determining the accuracy or calibration of a temperature-measuring device as the error in the ice bath temperature can be greater than 0.02 °C. For greater accuracy, the user should use Practice E563 to prepare the ice bath.

5.3 The ice point is a common practical industrial reference point of thermometry. The ice point is relatively simple to realize and provides a readily available natural fixed-point reference temperature.

5.4 This practice only checks the measurement drift at a single temperature. It will not detect a change in measurement response with change in temperature. Temperature-measuring devices should be recalibrated at set intervals. See device supplier for recommendations.

5.5 This practice provides a technique to determine minimum immersion depth of the sensing probe of the thermometer using an ice bath. The minimum immersion depth determined by this practice may change when the differential temperature differs significantly from the conditions described. A greater differential will likely increase the minimum immersion depth.

Subcomité:

D02.07

Referida por:

D0097-17BR22, D2500-23, D4539-22, D0097-17BR22, D2500-23, D5133-20A, D0287-22, D5133-20A, D7110-21, D2500-23, D0097-17BR22, D6371-24, D0287-22, D4539-22, D6371-24, D6371-24, D5853-24, D8278-20, D2983-23, D0287-22, D5853-24, D7098-21, D5853-24, D8164-21, D2983-23, D7279-20, D7279-20, D7279-20, D2983-23

Volúmen:

05.05

Número ICS:

17.200.20 (Temperature-measuring instruments)

Palabras clave:

fixed-point temperature references; ice bath; minimum immersion depth; temperature measurement drift;