Testboy TB 317 Manual De Instrucciones página 27

Operation
Changing the fuse
Remove the screws at the back, open the battery compartment, remove the holster, and re-
move the housing screws and fuse. Insert a new fuse (F 10A). Reassemble in the reverse or-
der and secure with screws.
Only use the fuses specified!
The following measurement categories have been de-
fined in accordance with EN 61010-1:
Measurement category CAT II
Measurements on circuits that are directly wired to the mains, via plugs in the home, office and
laboratory.
Measurement category CAT III
Measurements on building installations: fixed consumers, distributor connection, equipment
fitted permanently to the distributor.
Measurement category CAT IV
Measurements at the source of the low voltage installation: meters, primary surge protection,
mains connection
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Testboy TB 317 27