Replacing The Fuses - Extech Instruments EX503 User Manual

WARNING: To avoid electric shock, do not operate the meter until the battery cover is in
place and fastened securely.
NOTE: If your meter does not work properly, check the fuses and batteries to make sure that
they are still good and that they are properly inserted.
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REPLACING THE FUSES

WARNING: To avoid electric shock, disconnect the test leads from any source of voltage
before removing the fuse cover.
1. Disconnect the test leads from the meter.
2. Remove the battery cover (two "B" screws) and the battery.
3. Remove the six "A" screws securing the rear cover.
4. Gently remove the old fuse and install the new fuse into the holder.
5. Always use a fuse of the proper size and value (0.5A/1000V fast blow for the 400mA
range [SIBA 70-172-40], 10A/1000V fast blow for the 20A range [SIBA 50-199-06]).
6. Replace and secure the rear cover, battery and battery cover.
WARNING: To avoid electric shock, do not operate your meter until the fuse cover is in
place and fastened securely.
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