Benning CM 1-2 Notice D'emploi page 17

7.4 Resistance measuring range and acoustic continuity test
(BENNING CM 1-2)
Overload protection: 600 V
Measuring
Resolution
range
200 Ω 0.1 Ω
2 kΩ 1 Ω
20 kΩ 10 Ω
200 kΩ 100 Ω
2 MΩ 1 kΩ
20 MΩ 10 kΩ
The integrated buzzer sounds if the resistance R is lower than 20 Ω.
The change-over point of the range selection might be already at a value of
1400!
8. Measuring by means of the BENNING CM 1‑1/ 1‑2
8.1 Preparing the measurement
Operate and store the BENNING CM 1-1/ 1-2 at the specified storage and
operating temperatures only! Do not permanently expose the device to
sunlight.
- Check stated nominal voltage and nominal current on the safety measuring
lines. Nominal voltage and current of the enclosed safety measuring lines
comply with the respective values of the BENNING CM 1-1/ 1-2.
- Check insulation of the safety measuring lines. If the insulation is damaged,
the safety measuring lines must be replaced immediately.
- Check the safety measuring lines for continuity. If the conductor in the
safety measuring line is interrupted, replace the safety measuring lines
immediately.
- Before selecting another function by means of the sliding switch 7,
disconnect the safety measuring lines from the measuring point.
- Strong sources of interference in the vicinity of the BENNING CM 1-1/ 1-2
might involve unstable readings and measuring errors.
8.2 Voltage measurement (BENNING CM 1-2)
Do not exceed the maximum permitted voltage with respect to

earth potential! Electrical danger!
The highest voltage which may be applied to the
- COM jack 9
- jack for V and Ω 8
of the BENNING CM 1-2 against ground is 600 V.
- Select the desired function (V AC/ DC) by means of the sliding switch 7 of
the BENNING CM 1-2. Select the desired function AC or DC by means of
the shift key (V~/ V ).
- Connect the black safety measuring line to the COM jack 9 of the
BENNING CM 1-2.
- Connect the red safety measuring line to the jack for V and Ω 8 of the
BENNING CM 1-2.
- Bring the safety measuring lines into contact with the measuring points and
read the measured value on the digital display 1 of the BENNING CM 1-2.
See figure 2:
See figure 3:
8.3 AC current measurement
8.3.1 Preparin g the measurement
Operate and store the BENNING CM 1-1/ 1-2 at the specified storage and
operating temperatures only. Do not expose the device to permanent sunlight.
- Strong sources of interference in the vicinity of the BENNING CM 1-1/ 1-2
might involve unstable readings and measuring errors.
Do not apply any voltag to the output contacts of the

BENNING CM 1‑1/ 1‑2! Any possibly connected safety measuring
lines have to be removed.
05/ 2008
eff
Measuring accuracy
± (1,0 % of the measured value + 5 digits)
± (0.7 % of the measured value + 2 digits)
± (0.7 % of the measured value + 2 digits)
± (0.7 % of the measured value + 2 digits)
± (1.0 % of the measured value + 2 digits)
± (1.9 % of the measured value + 5 digits)
DC voltage measurement
AC voltage measurement
BENNING CM 1‑1/ 1‑2

Max. open-
circuit voltage
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
12