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GMC-I Messtechnik GmbH
Inspecting the Integrated Fuse F2
The fuse F2 is located in the battery supply path. If the LC
display is not active upon switching the instrument on:
➭
check whether the batteries have been inserted with
the polarity symbols at the correct end.
If the LCD remains inactive it might be defective.
Replacing the Fuses
Fuse F1 for the m
Ω
/
Ω
measuring ranges and fuse F2 for
the battery power supply are both firmly soldered in. They
are not intended to be replaced by the user.
If one of the fuses is defective, you are requested to send
the instrument to our repair service or to the respective
subsidiary abroad (the address is given in chapter 12).
This provides you with the guarantee that type-tested and/or
Ex-approved fuses with the correct triggering characteristics,
nominal current and breaking capacity are inserted. Addition-
ally, the instrument will be subjected to a safety test.
Instructions for the service
Warning!
Ex Environment:
Remove the instrument from the
potentially explosive environment before opening.
Attention!
!
Non-Ex Environment:
Disconnect the instrument
from the measuring circuit before opening to re-
place batteries!
➭
Open the instrument in the same manner as for replac-
ing the batteries.
Warning!
Use the specified type-tested fuses only!
If fuses with other blowing characteristics, other
current ratings or other breaking capacities are
used, the operator is placed in danger, and pro-
tective diodes, resistors and other components
may be damaged.
The use of repaired fuses and short-circuiting the
fuse holder are prohibited.
10.3 Housing and Display
No special maintenance is required for the housing. Keep out-
side surfaces clean. Use a cloth slightly dampened with water
for cleaning.
Attention ! Do not under any circumstances use cleansers, abrasi-
ves and solvents !
This particularly applies to the display surface to avoid
damaging the high-quality explosion protection coating,
thus reducing its efficiency.