Maintenance; Securing The Device; Battery Replacement - Benning CM 1-4 Bedienungsanleitung

8.9 Single-poleexternalconductortest(phaseindication)
Removetheblacksafetymeasuringleadfromtheblackjack(-/
L1) 9 of the BENNING CM 1-4!
Do not exceed the maximum permitted voltage with respect to
earth potential!

Please observe the overvoltage category of the electric circuit!
Attach the protective caps (CAT III/IV) to the contact tips be-
fore making measurements in circuits of overvoltage category
CAT III or IV.
Electrical danger!
- Connect the black safety measuring lead to the black jack (-/L1) 9 of the
BENNING CM 1-4.
- Connect the red safety measuring lead to the red jack (+/L2) J of the
BENNING CM 1-4.
- Press the Ω/A key 6 or the HOLD key 7 to switch on the BENNING CM 1-4.
- The BENNING CM 1-4 is ready as soon as the digital display 4 shows the
" - - - - " symbol.
- Fully grasp the rubberized gripping surface 8 of the BENNING CM 1-4 and
apply the red test probe +/L2 to the system part to be tested.

- If the red
conductor (phase) of an AC voltage is applied to this system part.
Note:
The single-pole external conductor test (phase indication) can be carried out
in an earthed three-phase mains from 90 V to 1000 V, 45 Hz to 65 Hz (phase
to phase). Protective clothing and insulating conditions on site might impair the
function.
see fig. 8: Single-pole external conductor test (phase indication)
9.

Maintenance

Before opening the BENNING CM 1-4, strictly observe that the

device is free of voltage! Electrical danger!
Working on the opened BENNING CM 1-4 under voltage must be carried out
by skilled electricians special precautions for the prevention of accidents
only!
Make sure that the BENNING CM 1-4 is free of voltage as described below be-
fore 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 1-4.
- Wait until the BENNING CM 1-4 switches off automatically.

9.1 Securing the device

Under certain circumstances, safe operation of the BENNING CM 1-4 might no
longer be ensured, e.g. in case of:
- visible damage of the housing and/or the safety measuring leads,
- incorrect measuring results,
- abnormal behaviour during the self-test
- 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 1-4, 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 cleaning
wipers). Do not use any solvents and/or abrasives to clean the device. Make sure
that the battery compartment and the battery contacts are not contaminated by
leaking battery electrolyte.
If there are electrolyte contamination 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 1-4, strictly observe that the

device is free of voltage! Electrical danger!
The BENNING CM 1-4 is supplied by means of two integrated 1.5 V micro bat-
teries. Battery replacement (see fig. 9) is required as soon as all segments of
09/ 2019
LED lights up and an acoustic signal is emitted, the external
BENNING CM 1–4
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