VOLTCRAFT CC-421 Bedienungsanleitung Seite 33

replacement is described below. To clean the device, the display
window, and the test leads, use a clean, lint-free, antistatic and dry
cloth.
Caution!
Do not use carbon-containing cleaning agents, ben-
zines, alcohols or the likes as they attack the surface
of the measurement device. Furthermore, the fumes
are detrimental to the health and explosive. Do not
use sharp tools, screwdrivers, metal brushes, etc.
for cleaning.
b Battery replacement
A 9-V block battery is required for operating the current calibrator. If
the low-battery indicator "BAT" appears a few hours before the bat-
tery is empty (from approx. 7.5 V), the battery needs to be replaced.
For this purpose, proceed as follows:
- Disconnect the measuring device from the test circuit,
- disconnect the test leads from the measuring device,
- turn it off and
- loosen the screw of the battery cover by using an appropriated
screwdriver (for recessed-head screws).
- Lift the battery cover. The battery compartment is now open.
- Put on throw-away gloves, remove the old battery and dis-
connect it from the connecting clip.
- Replace it by a new, fresh battery, attach it to the connecting clip
(observe correct polarity).
- After the battery replacement/installation, close the battery com-
partment carefully. Make sure that the cables of the connecting
clip are not jammed.
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