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free cloth. Do not use abrasive cleaners, tissues, or
paper towels which can scratch the plastic surface.
Replacing the
Line Fuse
The value of the line fuse used in the 681XXC is de
-
termined by the line voltage selection—a 5A type T
line fuse for 110 Vac line voltage; a 2.5A type T line
fuse for 220 Vac line voltage. These line fuse values
are printed on the rear panel next to the fuse holder.
Step 1 Disconnect the 681XXC from the power
source.
Step 2 Using a small flat-blade screwdriver, turn
the fuse cap counter-clockwise and re
-
move the fuse holder.
6-14 681XXC OM
OPERATOR ROUTINE
MAINTENANCE MAINTENANCE
Before changing the fuse, always remove the power cord
from the power outlet. There is the risk of receiving a fatal
electric shock if the fuse is replaced with the power cord con
-
nected.
Always use a new fuse of the type and rating specified by
the fuse markings on the rear panel of the instrument.
WARNING
Figure 6-2. Replacing the Line Fuse