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d) Fuse Replacement
The current measurement ranges are protected by high-performance fuses. If measuring in this range is no longer
possible, you have to change the fuse.
The fuses can be checked with the housing closed via the resistance measuring function. Select the meas-
uring function “Ω”. Connect the measuring jack “Ω” (E) to the mA jack (B) or the A jack (C) with a measuring
line.
The following measured values should be displayed if the fuses are intact:
mA : <1.5 MΩ, A : < 5 Ω. When a higher value or “OL” is displayed, the fuse must be replaced.
Proceed as follows for fuse replacement:
- Disconnect the connected measuring lines from the measuring circuit and the meter. Switch off the DMM.
- Open the casing as described in chapter “Opening Meter”.
- Replace the defective fuse with a new fuse of the same type and rated current. The fuses have the following values:
Fuse
F1
F2
Characteristic
Quick-acting
Quick-acting
Value
FF600mA H 1000 V
F11A H 1000V
Dimension
6 x 32 mm
10 x 38 mm
Type
Ceramics
Ceramics
Item no.
442335
126357
Close the casing again carefully.
Using mended fuses or bridging the fuse holder is not permitted for safety reasons. It may cause
fires or arc explosions. Never operate the meter when it is open.
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