Opening Meter; Fuse Change - VOLTCRAFT VC-420 Bedienungsanleitung

c) Opening Meter
The casing design only permits access to the battery and fuse even when the battery and fuse compartment is
opened.
These measures improve user safety and operational comfort.
Proceed as follows to open it:
- Disconnect all measuring lines from the meter and switch it off.
- Open the rear standing bracket (9).
- Release the rear battery compartment screw (6) with a matching screw-
driver.
- Pull the battery compartment lid (9) downwards off of the meter with the
standing bracket folded open.
- The fuses and the battery compartment can be accessed now.
- After opening the battery compartment lid, always grease the rubber
seal around the battery and fuse compartment with silicone grease. This
ensures protection against ingressing dust and water.
- Close the casing again in the reverse order and screw the battery and
fuse compartment closed.
- The meter is ready for use once again.
d) Fuse Change
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.
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
Characteristic
Quick-acting
Value F800mA H 1000 V
Dimension
6.3 x 32 mm
Type Ceramics
- Close the casing carefully again.
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.
F2
Quick-acting
F10A H 1000V
10 x 38 mm
Ceramics
53