Voltage Measurements; Current Measurements - Benning CM 1-3 Instrucciones De Servicio

nect the safety measuring lines from the measuring point.
- Strong sources of interference in the vicinity of the BENNING CM 1-3 might
involve unstable readings and measuring errors.

8.2 Voltage measurements

Do not exceed the maximum permitted voltage with respect to
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earth potential! Electrical danger!
The highest voltage that may be applied to the jacks
- COM jack 6
- jack for V and Ω 7
of the BENNING CM 1-3 against ground is 1000 V.
- Select the desired function (V AC) or (V DC) by means of the rotary switch
2 of the BENNING CM 1-3.
- Connect the black safety measuring line to the COM jack 6 of the
BENNING CM 1-3.
- Connect the red safety measuring line to the jack for V and Ω 7 of the
BENNING CM 1-3.
- Bring the safety measuring lines into contact with the measuring
points and read the measured value on the digital display 3 of the
BENNING CM 1-3.
See figure 2:
See figure 3:

8.3 Current measurements

8.3.1 Preparing the measurement
Operate and store the BENNING CM 1-3 at the specified storage and operating
temperatures only! Do not permanently expose the device to sunlight.
- Strong sources of interference in the vicinity of the BENNING CM 1-3 might
involve unstable readings and measuring errors.
Do not apply any voltage to the output contacts of the

BENNING CM 1-3! Any possibly connected safety measuring
lines have to be removed.
8.3.2 Current measurements
- Select the desired function (A~) by means of the rotary switch 2 of the
BENNING CM 1-3.
- Push the fork over the conductor wire. The conductor wire must be in the
open area.
- Read the value indicated on the digital display 3.
See figure 4:
8.4 Resistance measurements
- Select the function (Ω) by means of the rotary switch 2 of the
BENNING CM 1-3.
- Connect the black safety measuring line to the COM jack 6 of the
BENNING CM 1-3.
- Connect the red safety measuring line to the jack for V and Ω 7 of the
BENNING CM 1-3.
- Bring the safety measuring lines into contact with the measuring
points and read the measured value on the digital display 3 of the
BENNING CM 1-3.
Note:
- To obtain a correct measurement, ensure that no voltage is applied to the
measuring point.
- With small resistances, the measuring result can be improved by measuring
the resistance of the safety measuring wires beforehand by short-circuiting
the measuring tips and subtracting the reading obtained from the resistance
measured.
See figure 5:
8.5 Diode tests
- Select the function (
BENNING CM 1-3 and press the HOLD
- Connect the black safety measuring line to the COM jack 6 of the
BENNING CM 1-3.
- Connect the red safety measuring line to the jack for V, Ω 7 of the
BENNING CM 1-3.
05/ 2008
DC voltage measurement
AC voltage measurement
AC current measurement
Resistance measurement
) by means of the rotary switch 2 of the
BENNING CM 1-3
-key „diode test".
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