Maintenance; Securing The Instrument; Battery Replacement - Benning CM 11 Bedienungsanleitung

See figure 5: Resistance measurement
8.5 Continuity testing with buzzer
- Use the rotary switch 5 to select the required function
- The black safety measuring lead has to be contacted with the COM jack J on the
BENNING CM 11.
- Connect the red safety measuring lead to the V-Ω jack K, marked in red.
- Apply the safety measuring leads to the measuring points. If the resistance between the
measuring points falls below 100 Ω, the integrated buzzer of the BENNING CM 11 sounds.
See figure 6: Continuity testing with buzzer
9.

Maintenance

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Before opening the BENNING CM 11, make sure that it is free of voltage!
Electrical danger!
Work on the opened BENNING CM 11 under voltage may be carried out only by skilled
electricians with special precautions for the prevention of accidents.
Make sure that the BENNING CM 11 is free of voltage as described below before opening the
instrument:
- First, remove the BENNING CM 11 and the two safety measuring leads from the measuring
object.
- Then disconnect the two safety measuring leads from the BENNING CM 11.
- Turn the rotary switch 5 to the switch setting "OFF".
The BENNING CM 11 is not equipped with a fuse.

9.1 Securing the instrument

Under certain circumstances safe operation of the BENNING CM 11 is no longer ensured, for
example in the case of:
- Visible damage of the casing.
- Incorrect measurement results.
- Recognisable consequences of prolonged storage under improper conditions.
- Recognisable consequences of extraordinary transportation stress.
In such cases the BENNING CM 11 must be switched off immediately, discon nected from the
measuring points and secured to prevent further utilisation.
9.2 Cleaning
Clean the casing externally with a clean dry cloth (exception: special cleaning wipers). Avoid
using solvents and/ or scouring agents for cleaning the instru ment. It is important to make sure
that the battery compartment and battery contacts are not contaminated by leaking electrolyte.
If electrolyte contamination or white deposits are present in the region of the batteries or battery
casing, clean them too with a dry cloth.

9.3 Battery replacement

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Before opening the BENNING CM 11, make sure that it is free of voltage!
Electrical danger!
The BENNING CM 11 is supplied by means of two 1.5 V batteries of type AAA (IEC LR03).
Battery replacement is required, if the battery symbol
Proceed as follows to replace the batteries:
- Disconnect the safety measuring leads from the measuring circuit.
- Disconnect the safety measuring leads from the BENNING CM 11.
- Set the rotary switch 5 to the switch setting "OFF".
- Lay the BENNING CM 11 face down and release the screws of the battery compartment
cover.
- Lift the battery compartment lid (in the housing recess area) from the bottom section.
- Replace the exhausted batteries by two new ones of type AAA (LR03). Make sure that the
new batteries are inserted with correct polarity!
- Place the battery compartment cover onto the bottom part and tighten the screw.
See figure 7: Battery replacement
Make your contribution to environmental protection! Do not dispose of
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discharged batteries in the household garbage. Instead, take them to a
collecting point for discharged batteries and special waste material. Please
inform yourself in your community.
11/ 2014
BENNING CM 11
/ Ω on the BENNING CM 11.
appears on the display 9 .
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