Trouble Shooting - Bosch MMD 540H Instruction Manual

32 | MMD 540H Hybrid Multimeter | Trouble Shooting

Trouble Shooting

1. Meter will not turn ON.
– Check the battery contacts for a tight fi t.
– Check for a minimum battery voltage of 8.0 volts.
2. Ampere reading is erratic or there is no reading at all.
– Disassemble the meter back cover as per the fuse
replacement instructions on page 31 and test the fuses for
continuity with another meter.
3. Meter reading is erratic.
– Printed circuit board damaged from handling with hands.
– Low battery.
– "Blown" fuse.
– Open circuit in a test lead (frayed or broken wire).
4. Meter readings do not change.
– "Hold" feature is still toggled ON.
Robert Bosch LLC
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MMD 540H Instruction Manual | Version 1 | February 2008