Ac Current Measurement; Maintenance - Benning CFlex 1 Instrucciones De Servicio

ble readings and measuring errors.
- Do not apply any voltage to the output contacts of the BENNING CFlex 1.
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Do not exceed the maximum permitted voltage with respect to earth potential!
Electrical danger!
The highest voltage that may be applied to the BENNING CFlex 1 with respect to earth potential
is 600 V CAT III / 1000 V CAT II.

8.2 AC current measurement

- Select the measuring range (30 A, 300 A or 3000 A) by means of the rotary switch  .
- Set the multimeter to the AC current measuring function (V AC) and select a measuring
range which can display voltages up to 3000 mV.
- Connect the black 4 mm safety plug of the safety measuring lead to the COM jack of the
multimeter.
- Connect the red 4 mm safety plug of the safety measuring lead to the voltage input jack (V)
of the multimeter.
- Clamp the single-wire live conductor centrally by means of the flexible measuring loop  .
- Read the voltage value on the multimeter and convert it to the respective current value
considering the conversion factor.
Example 1: Measuring range: 30 A (100 mV / A)
Voltage value displayed on the multimeter: 2.500 V AC = 2500 mV AC, corresponds to a meas-
ured current value of 25 A AC.
Example 2: Measuring range: 300 A (10 mV / A)
Voltage value displayed on the multimeter: 2.500 V AC = 2500 mV AC, corresponds to a meas-
ured current value of 250 A AC.
Example 3: Measuring range: 3000 A (1 mV / A)
Voltage value displayed on the multimeter: 2.500 V AC = 2500 mV AC, corresponds to a meas-
ured current value of 2500 A AC.
See Figure 2 a:
See Figure 2 b:
9.

Maintenance

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Before opening the BENNING CFlex 1, make sure that it is free of voltage!
Electrical danger!
Work on the opened BENNING CFlex 1 under voltage may be carried out only by skilled elec­
tricians with special precautions for the prevention of accidents.
Make sure that the BENNING CFlex 1 is free of voltage as described below before opening
the instrument:
- First, remove the BENNING CFlex 1 from the object to be measured.
- Then, remove both safety plugs of the safety measuring lead from the multimeter.
The BENNING CFlex 1 AC current transformer is not equipped with a fuse.
9.1 Securing the instrument
Under certain circumstances safe operation of the BENNING CFlex 1 is no longer ensured, for
example in the case of:
- Visible damage of the casing.
- Incorrect measurement results.
- Recognisable consequences of prolonged storage under improper conditions.
- Recognisable consequences of extraordinary transportation stress.
In such cases, immediately disconnect the BENNING CFlex 1 from the measuring point and
secure it against further use.
9.2 Cleaning
Clean the exterior of the housing with a clean dry cloth (exception: special cleaning wipers).
Avoid using solvents and/ or scouring agents for cleaning the instrument. It is important to
make sure that the battery compartment and battery contacts are not contaminated by leaking
electrolyte.
If electrolyte contamination or white deposits occur in the area of the batteries or battery com-
partment, clean them too with a dry cloth.
04/ 2019
Alternating current measurement
Alternating current measurement
BENNING CFlex 1
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