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Heat-Prober
Platinum-RTD Thermometers User Manual
10.0 392M TROUBLE-SHOOTING AID
10.1 Scope
This section describes basic diagnostics to find the majority of the problems with malfunctioning
392M units.
Equipment Required:
1. Wahl 392M Calibrator (Model Number CAL392-HT)
2. 4- Digit DVM, Fluke 8600A or equivalent.
3. Oscilloscope.
4. Power supply, Power/mate BPA-10c or equivalent.
10.2 Procedure
Make certain that the 392 unit experiencing the problem has been properly set-up, per Section
6.0, before proceeding to this section.
HOW TO USE TROUBLE-SHOOTING PROCEDURE: Locate the problem on this table and
proceed with the action starting with Step 1. Note, for all DVM and scope measurements,
connect the (-) lead to CR1 Cathode (GND).
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