Current Measurement; Maintenance; Battery Replacement - Benning CM 2 Notice D'emploi

See fig. 4:
8.4 Continuity testing with buzzer
- Select the area marked with the buzzer symbol with the sliding switch 
and the function button  of the BENNING CM 2.
- Contact the black safety measuring lead with the COM-socket  (black).
- Contact the red safety measuring lead with the V- socket  (red).
- Bring the black and red measuring tips into contact with the measurement
points. If the resistance between the measurement points is less than 50 ,
the buzzer incorporated in the BENNING CM 2 sounds.
See fig. 5:

8.5 Current measurement

8.5.1 Preparation for measurement
Store and use the BENNING CM 2 only under the correct temperature condi-
tions stated. Always avoid long exposure to sunlight.
- Strong sources of interference close to the BENNING CM 2 may produce
unstable readings and measurement errors.
Do not apply voltage to the output contacts of the BENNING CM 2.

If necessary, remove the safety measuring leads connected.
When measuring DC current, observe correct polarity.
8.5.2 Current measurement
- Select the desired measuring function with the sliding switch  and the
function button .
- Press the "ZERO" button to set the BENNING CM 2 to the starting point.
- Operate the opening lever . Grip the single wire containing the current to
be measured with the prongs of the BENNING CM 2.
- Read the value in the digital display .
See fig. 6:
9.

Maintenance


Before opening the BENNING CM 2, ensure that it is not
connected to a source of voltage! Electrical hazard!
Any work required on the BENNING CM 2 when it is under voltage must be
done only by a qualified electrician. Special steps must be taken to pre­
vent accidents.
Before opening the BENNING CM 2, remove it from all sources of voltage as
follows:
- Remove first the black and the red measuring tip from the measurement object.
- Then remove the black and red safety measuring leads from the BENNING CM 2.
- Move the sliding switch to the position "OFF".
9.1 Making the unit safe
Under certain circumstances, the safety of the BENNING CM 2 can no longer
be guaranteed. This may be the case if:
- there are visible signs of damage on the unit,
- errors occur in measurements,
- the unit has been stored for a long period of time under the wrong condi-
tions, and
- if the unit has been subjected to rough handling during transport.
In these cases, the BENNING CM 2 must be switched off immediately, removed
from the measuring points and secured to prevent it from being used again.
9.2 Cleaning
Clean the outside of the unit with a clean dry cloth. (Exception: any type of
special cleaning cloth). Never use solvents or abrasives to clean the clamp
meter. Ensure that the battery compartment and the battery contacts have not
been contaminated by electrolyte leakage. If any electrolyte or white deposits
are seen in the battery compartment or battery housing, remove these with a
dry cloth.

9.3 Battery replacement


Before opening the BENNING CM 2, ensure that it is not
connected to a source of voltage! Electrical hazard!
The BENNING CM 2 is powered by two 1.5 V batteries. The batteries must be
replaced (see fig. 8) when the battery symbol appears in the display .
03/ 2019
Resistance measurement
Continuity testing with buzzer
AC/ DC current measurement
BENNING CM 2

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