AM1860/1850 Standard Platinum Resistance ThermometerUser’s Guide6/10minimize the error, appropriate immersion depths are required. Apractical way to determine the minimum immersion depths is tochange the depth gradually until the readings have significantchanges after stabilization.Do not submerge PRT handle when taking measurement.3.5 Thermal EMFEach AccuMac PRT has gone through an annealing process andstability test to minimize the thermal EMF, which is caused byeither impurities of sensing element or temperature differentials atlead wires connection point.3.6 Over HeatingThe sensing element this SPRT is sealed inside an Inconeltm sheathto ensure the best stability and repeatability. The seal can bebreached if the SPRT is over heated for an extended period oftime.