Fluke 5626/5628

Problem Causesand Solutions

Temperaturereadout differ-

entth an expected, e.g. the

heatsource is set at 300°C,

thePRT measures 275°C.

•Measure the PRT resistance atTPW.

•If the resistance of the PRT is less than the rated resis-

tance, e.g. 70 Ωfor the 5626, there may be a short in

the sensor. Contact an Authorized Hart Scientific Service

Center (see Section1.3).

•If the resistance of the PRT is only a few ohms, there

may be a short in the four lead-wires. Contact an Autho-

rized Hart Scientific Service Center (see Section1.3).

•If the PRT is open, the resistance will be “Out of Limits”

or in the kilo-ohm ormega-ohm range. Contact an Au-

thorized Hart Scientific Service Center (see Section1.3).

5626/5628

User’s Guide