Apogee Instruments ST-150 Manuel du propriétaire - Page 7

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Calibration Traceability

Apogee ST-100, ST-110, and ST-200 temperature sensors are not factory calibrated but come with a generic

calibration (see Steinhart-Hart coefficients in OPERATION AND MEASUREMENT section). A custom calibration can

be derived by comparing the temperature from the thermistor to a reference temperature measurement. Often, a

simple offset can be used to make measured temperature match reference temperature.

Apogee ST-110, ST-150, and ST-300 temperature sensors are factory verified to ensure accuracy. Sensors are

compared for absolute temperature against the mean of two reference PRTs in a constant temperature bath, over

a range of approximately -35 to 60 C. The reference PRT calibrations are directly traceable to NIST.

Accuracy for multiple classifications of PRTs across a temperature range of -60 to 60 C. Temperature tolerance

specifications (y axis) are defined by International Electrotechnical Commission (2017).

International Electrotechnical Commission. 2017. IEC 60751:2008. Industrial platinum resistance thermometers

and platinum temperature sensors. International Electrotechnical Commission.

https://webstore.iec.ch/publication/3400 (verified 10 Oct. 2017). [2017 is year accessed].