Thermal Emf; Over Heating - AccuMac AM1730 User Manual

AM1730 Secondary Reference Platinum Resistance Thermometer
User's Guide
minimize the error, appropriate immersion depths are required. A
practical way to determine the minimum immersion depths is to
change the depth gradually until the readings have significant
changes after stabilization.
Do not submerge PRT handle when taking measurement.

3.5 Thermal EMF

Each AccuMac PRT has gone through an annealing process and
stability test to minimize the thermal EMF, which is caused by
either impurities of sensing element or temperature differentials at
lead wires connection point.

3.6 Over Heating

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The sensing element of AM1730 PRT is sealed inside an Inconel
sheath to ensure the best stability and repeatability. The seal can be
breached if the PRT is over heated for an extended period of time.
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