Performance Testing and Calibration
Calibrating the Tester
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Figure 4-2. Battery Removal
3. In order for the Tester to remain on while replacing the battery door, remove the
battery shunt spring and reinsert it with the spring’s straight edge on the battery side
of the plastic wall (Figure 4-3). Place four fresh “C” cell batteries in the Tester,
taking care to ensure proper polarity.
4. Press O to turn the Tester on and allow it to warm up for at least 2 minutes.