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Benning CFlex 1 Manual

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07/ 2014
BENNING CFlex 1
8
5.1.6 Length of the measuring loop: approx. 46 cm
5.1.7 Cable diameter of the measuring loop: approx. 8.5 mm
5.1.8 Cable length from measuring loop to housing: approx. 1.8 m
5.1.9 Cable length (housing to the 4 mm safety plugs): approx. 0.5 m
5.1.10 Housing dimensions: (L x W x H) = 120 x 70 x 26 mm
5.1.11 Weight of the device: 325 g
6. Ambient conditions
- The BENNING CFlex 1 is intended for making measurements in dry environment.
- Maximum barometric elevation for making measurements: 2000 m,
- Overvoltage category: IEC 60664/ IEC 61010 → 600 V category III, 1000 V category II
- Contamination class: 2 (EN 61010-1),
- Protection class: IP 30 (DIN VDE 0470-1, IEC/ EN 60529)
IP 30 means: Protection against access to dangerous parts and protection against solid
impurities of a diameter > 2.5 mm, (3 - first index). No protection against water, (0 - second
index).
- Operating temperature and relative humidity:
For operating temperatures from 0 °C to 50 °C: relative air humidity lower than 80 %, non-
condensing
- Storage temperature: The BENNING CFlex 1 can be stored at temperatures between
- 10 °C and + 60 °C, at a relative air humidity lower than 70 % without batteries.
7. Electrical specifications
Note: The measuring accuracy is specified as
- a relative part of the final measuring range value
This specified measuring precision is valid for temperature of 23 °C ± 5 °C and for a relative
humidity lower than 80 %.
7.1 Alternating current ranges
Output voltage: 100 mV
AC
/ A
AC
in the 30 A measuring range
10 mV
AC
/ A
AC
in the 300 A measuring range
1 mV
AC
/ A
AC
in the 3000 A measuring range
Measuring range Measured value Output
Measuring precision*
within the frequency range 45 Hz - 65 Hz
30 A 0 . . . 30 A 0 . . . 3000 mV ± (3.0 % of the final measuring range value)
300 A 30 . . . 300 A 300 . . . 3000 mV ± (3.0 % of the final measuring range value)
3000 A 300 A . . . 3000 A 300 . . . 3000 mV ± (3.0 % of the final measuring range value)
* The measuring accuracy is specified for a sinusoidal curve. The stated accuracy is specified
for conductors that are centrally clamped by means of the measuring loop
(see figure 3).
For conductors that are not centrally clamped, an additional error has to be considered.
Distance from the middle Positioning error
25 mm ± (1.0 % of the final measuring range value)
50 mm ± (2.0 % of the final measuring range value)
75 mm ± (3.0 % of the final measuring range value)
Load impedance: min. 10 kΩ (input resistance of the multimeter)
Noise: 0.03 A / 0.075 A / 0.5 A
Band width (-3 dB): 10 Hz to 10 kHz
Phase error: < ± 1°
8. Measuring with the BENNING CFlex 1
8.1 Preparing the measurement
Operate and store the BENNING CFlex 1 at the specified storage and operating temperatures
only! Do not permanently expose the device to sunlight.
- Nominal voltage and nominal current of the enclosed safety measuring lead comply with the
respective values of the BENNING CFlex 1. The safety measuring lead is firmly connected
with the BENNING CFlex 1 and is not detachable.
- Check the insulation of the safety measuring lead. If the insulation is damaged, the
BENNING CFlex 1 must be scrapped immediately.
- Do not clamp a live conductor with by means of the measuring loop before the
BENNING CFlex 1 is connected with a multimeter.
- Strong sources of interference in the vicinity of the BENNING CFlex 1 might involve unsta-
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