Maintenance - Benning CM 9-1 Notice D'emploi

- Use the rotary switch 5 to select the required function mA
- If necessary, press the ZERO key 6 for 2 seconds to enable the low-pass filter (LPF).
- Press the "ZERO" button 6 to set the BENNING CM 9-1 to the starting point.
- Operate opening lever 4 , clamp 1 single wire live conductor centrally by means of the
BENNING CM 9-1 current probe.
- Read off the digital display unit 9 .
8.3.1 Leakage current measurement at the ground conductor
See figure 4: Leakage current measurement at the ground conductor
8.3.2 Differential current measurement at single-phase systems
See figure 5: Differential current measurement at single-phase systems
8.3.3 Leakage current measurement via ground conductor (charge eliminator) for three-
phase supply
See figure 6: Leakage current measurement via ground conductor (charge eliminator) for
three-phase supply
8.3.4 Differential current measurement, load supplied in three-phase, without N-type
conductor
See figure 7: Differential current measurement, load supplied in three-phase, without N-type
conductor
8.3.5 Differential current measurement, load supplied in three-phase, with N-type
conductor
See figure 8: Differential current measurement, load supplied in three-phase, with N-type
conductor
8.3.6 Alternating current measurement
See figure 9: Alternating current measurement
8.4 Resistance measurement
- Select the function
- The black safety measuring lead has to be contacted with the COM jack J on the BENNING
CM 9-1.
- Connect the red safety measuring lead to the V-Ω jack K , marked in red.
- Bring the safety measuring leads into contact with the measuring points, read off measured
value on the digital display 9 on the BENNING CM 9-1.
Note:
- To obtain a correct measurement, ensure that no voltage is applied to the measuring point.
See figure 10: Resistance measurement
8.5 Continuity testing with buzzer
- Use the rotary switch 5 to select the required function
press the „PEAK" key 7 .
- The black safety measuring lead has to be contacted with the COM jack J on the BENNING
CM 9-1.
- 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 approx. 45 Ω, the integrated buzzer of the BENNING CM 9-1
sounds.
See figure 11: Continuity testing with buzzer
9.

Maintenance

Before opening the BENNING CM 9-1, make sure that it is free of voltage!

Electrical danger!
Work on the opened BENNING CM 9-1 under voltage may be carried out only by skilled
electricians with special precautions for the prevention of accidents.
Make sure that the BENNING CM 9-1 is free of voltage as described below before opening the
instrument:
- First, remove the BENNING CM 9-1 and the two safety measuring leads from the measuring
object.
- Then disconnect the two safety measuring leads from the BENNING CM 9-1.
- Turn the rotary switch 5 to the switch setting "OFF".
The BENNING CM 9-1 is not equipped with a fuse.
10/ 2020
by means of the rotary switch 5 of the BENNING CM 9-1.
BENNING CM 9-1
 or A  on the BENNING CM 9-1.
on the BENNING CM 9-1 and

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