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REPLACING THE FUSES
WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the
test leads from the input terminals, and turn OFF the meter before opening the case. Do
not operate the meter with an open case.
1. Disconnect the test leads from the meter.
2. Remove the protective rubber holster.
3. Remove the battery cover (two "B"
screws) and the battery.
4. Remove the four "A" screws securing the
rear cover.
5. Lift the center circuit board straight up
from the connectors to gain access to
the fuse holders.
6. Gently remove the old fuse and install
the new fuse into the holder.
7. Always use a fuse of the proper size and
value (0.5A/250V fast blow for the 400mA range, 20A/250V fast blow for the 20A range).
8. Align the center board with the connectors and gently press into place.
9. 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.
Copyright © 2005 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
16
EX420-EU_ENG
V3.1
6/09
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