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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
res or arc explosions. Never operate the meter when it is open.
55


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