Maintenance; Battery Replacement - Benning CM 1-1 Instrucciones De Servicio

trally by means of the clamp of the BENNING CM 1-1/ 1-2.
- Read the value indicated on the digital display 1 .
See figure 4:
8.4 Resistance measurement and acoustic continuity test
( BENNING CM 1-2)
- Select the desired function ( ) by means of the sliding switch 7 of the
BENNING CM 1-2.
- Connect the black safety measuring lead to the COM jack 9 of the
BENNING CM 1-2.
- Connect the red safety measuring lead to the jack for V and Ω 8 of the
BENNING CM 1-2.
- Bring the safety measuring leads into contact with the measuring points and
read the measured value on the digital display 1 of the BENNING CM 1-2.
- If the conductor resistance between the COM jack 9 and the jack for V
and Ω 8 falls below 20 Ω, the integrated buzzer of the BENNING CM 1-2
sounds.
See figure 5:
9.

Maintenance

Before opening the BENNING CM 1‑1/ 1‑2, strictly observe that

the device is free of voltage! Electrical danger!
Working on the opened BENNING CM 1-1/ 1-2 under voltage must be carried
out by skilled electricians with special precautions for the prevention of
accidents only!
Make sure that the BENNING CM 1-1/ 1-2 is free of voltage as described below
before opening the device:
- First, remove both safety measuring leads from the object to be measured.
- Then, remove both safety measuring leads from the BENNING CM 1-1/ 1-2.
- Switch the sliding switch 7 to position „OFF".
9.1 Securing the device
Under certain circumstances, safe operation of the BENNING CM 1-1/ 1-2 might
no longer be ensured, e.g. in case of:
- visible damages of the housing,
- incorrect measuring results,
- recognizable consequences of prolonged storage under inadmissible condi-
tions and
- recognizable consequences of extraordinary stress due to transport.
In such cases, immediately switch off the BENNING CM 1-1/ 1-2, disconnect it
from the measuring points and secure it against further use.
9.2 Cleaning
Clean the exterior of the device with a clean dry cloth (exception: special clean-
ing wipers). Do not use any solvents and/ or abrasives to clean the device.
Strictly observe that the battery compartment and the battery contacts are not
contaminated by leaking battery electrolyte. If there are electrolyte contamina-
tion or white deposits in the area of the battery or the battery compartment, clean
these areas as well by means of a dry cloth.

9.3 Battery replacement

Before opening the BENNING CM 1‑1/ 1‑2, strictly observe that

the device is free of voltage! Electrical danger!
The BENNING CM 1-1 is supplied by means of an integrated 9 V block battery,
the BENNING CM 1-2 is supplied by means of two integrated 1.5 V micro bat-
teries. Battery replacement (see figure 6) is required, if the battery symbol 1
appears on the display 3 .
Proceed as follows to replace the battery:
- Disconnect the safety measuring leads from the measuring circuit
( BENNING CM 1-2).
- Disconnect the safety measuring leads from the BENNING CM 1-2.
- Switch the sliding switch 7 to position „OFF".
- Put the BENNING CM 1-1/ 1-2 face down and unscrew the screw of the
battery compartment cover.
- Lift off the battery compartment cover (in the area of the housing slots) from
the bottom part of the battery compartment.
- Remove the discharged battery/batteries from the battery compartment and
carefully disconnect the battery supply lines (BENNING CM 1-1) from the
battery.
02/ 2018
AC current measurement
Resistance measurement
BENNING CM 1-1/ 1-2

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