Benning CM 4 Instrucciones De Servicio página 14

7.6 PEAK HOLD
Measuring ranges: V AC, A AC
Coupling type: AC
In the PEAK-HOLD function (peak value storage) an additional error needs to
be taken into account for the specified precision.
+ (± 3% + 10 digits)
Measurement values: > 600 V
8. Making measurements with the BENNING CM 4
8.1 Preparations for making measurements
Operate and store the BENNING CM 4 only at the specified storage and
operating temperatures conditions. Avoid continuous insulation.
- Check rated voltage and rated current details specified on the safety measuring
lines. The nominal voltage and current ratings of the safety measuring
cables included in the scope of delivery correspond to the ratings of the
BENNING CM 4.
- Check the insulation of the safety measuring cables. Discard the safety
measuring cables immediately if the insulation is damaged.
- Check safety measuring lines for continuity. If the conductor in the safety
measuring line is interrupted, the safety measuring line must be quarantined
immediately.
- Before - at the rotary switch  a different function is selected, the safety
measuring lines must be disconnected from the measuring point.
- Strong sources of interference in the vicinity of the BENNING CM 4 can lead
to unstable readings and measuring errors.
8.2 Voltage measuring
Do not exceed the maximum permitted voltage with respect to

earth potential! Electrical danger!
The highest voltage which may be applied to the jacks,
- COM socket 
- jack for V, Ω 
of the BENNING CM 4 against ground, amounts to 600 V.
- Use the rotary switch  to select the required function (V AC) or (V DC) on
the BENNING CM 4.
- The black safety measuring cable has to be contacted with the COM jack
 on the BENNING CM 4.
- The red safety measuring cable has to be connected to the jack for V, Ω 
on the BENNING CM 4.
- Bring the safety measuring lines into contact with the measuring points,
read off measured value on the digital display  on the BENNING CM 4.
See figure 2:
See figure 3:
8.3 Alternating current measurement
8.3.1 Preparations for making measurements
Operate and store the BENNING CM 4 only at the specified storage and
operating temperatures conditions. Avoid continuous insulation.
Strong sources of interference in the vicinity of the BENNING CM 4 can lead to
unstable readings and measuring errors.
Do not apply any voltage to the output contacts of the

BENNING CM 4! Any possibly connected safety measuring
cables have to be removed.
8.3.2 Alternating current measurement
- Use the rotary switch  to select the required function (A AC) on the
BENNING CM 4.
- Operate opening lever , clamp single wire live conductor centrally by
means of the BENNING CM 4 current probe.
- Read off the digital display unit .
See figure 4:
8.4 Resistance measuring and acoustic continuity testing
- Use the rotary switch  to select the required function (Ω
BENNING CM 4.
- The black safety measuring cable has to be contacted with the COM jack
 on the BENNING CM 4.
12/ 2005
or 600 A
Peak
Direct voltage measurement
Alternating voltage measurement
Alternating current measurement
BENNING CM 4
are not specified
Peak

) on the
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