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GMC-I Messtechnik GmbH 67
Maintenance – Calibration
Replacing the Batteries
Attention!
!
Disconnect the instrument from the measuring circuit before open-
ing the battery compartment lid in order to replace the batteries.
Ð Set the instrument face down onto the working surface.
Ð Turn the slotted screw on the lid with the battery symbols
counterclockwise.
Ð Lift off the lid and remove the batteries from the battery com-
partment.
Ð Insert two new 1.5 V mignon batteries into the battery com-
partment, making sure that the plus and minus poles match up
with the provided polarity symbols.
Ð When replacing the battery compartment lid, insert the side
with the guide hooks first. Tighten the screw by turning it
clockwise.
Ð Please dispose of depleted batteries in accordance with envi-
ronmental protection regulations!
9.3 Fuse
Testing the Fuse
The fuse is tested automatically:
When the instrument is switched on with the rotary switch in
the A position
When the instrument is already on and the rotary switch is turned to
the A position
In the active current measuring range when voltage is applied
If the fuse is blown or has not been inserted, “FuSE” appears at
the digital display. The fuse interrupts the current measuring
ranges. All other measuring ranges remain functional.
Replacing the Fuse
If a fuse should blow, eliminate the cause of overload before plac-
ing the instrument back into service!
Attention!
!
Disconnect the instrument from the measuring circuit before
opening the fuse cover in order to replace the fuse!
Ð Set the instrument face down onto the working surface.
Ð Turn the slotted screw on the cover with the fuse symbol coun-
terclockwise.
Ð Lift off the cover and pry the fuse out using the flat side of the
fuse cover.
Ð Insert a new fuse. Make sure that the fuse is centered, i.e. be-
tween the tabs at the sides.
Ð When replacing the fuse cover, insert the side with the guide
hooks first. Tighten the screw by turning it clockwise.
Ð Dispose of the blown fuse with the trash.
Blown Fuse
fuse
A
DC
67


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