DTM900 and DTM920 Adjustment Procedures
12
Handheld and Benchtop Instruments Basic Service
To make internal adjustments, you must open the thermometer case and remove
the circuit board (see Figure 2 or Figure 3).
1. Unplug the thermocouple(s).
2. Lay the thermometer face down on a flat work surface.
3. Remove the single screw from the battery compartment cover with a
Phillips-head screwdriver and remove the battery compartment cover.
4. Remove the four screws from the corners of the thermometer.
5. Lift the top end of the cover and remove both the cover and the cap.
6. Remove the screws from the corners of the circuit board (the DTM900
thermometer has three screws; the DTM920 thermometer has four) and
gently lift the circuit board out of the case.
7. Remove the rubber keypad from the case.
8. Lay the circuit board face up.
9. Place the rubber keypad on the circuit board so it can be used to operate the
thermometer.
To reassemble the thermometer following the adjustments, perform steps 3
through 7 above in reverse order.
Open the Thermometer
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