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5.
General information
5.1 General details on the current clamp adapter
5.1.1
The sliding switch is intended to select the measuring ranges of 40 A
or 300 A AC/ DC.
5.1.2
The „ZERO" key (null balance key) is intended to carry out a null bal-
ance for direct current (DC) measurements. With the measuring clamp
being closed, press and hold the „ZERO" key until a measured
value of approximately 0 V is displayed on the multimeter.
5.1.3
The BENNING CC 3 switches off automatically after approx. 30 min-
utes (APO, Auto-Power-Off). It can be powered on again by pushing
switch . The automatic switch off is signaled by means of the illumina-
tion of the red LED (low battery indicaton) 6 .
5.1.4
The BENNING CC 3 is powered by one 9-V block battery (IEC 6 LR 61).
5.1.5
If the battery voltage falls below the specified operating voltage of the
BENNING CC 3, the red LED (battery indication) 6 starts lighting.
5.1.6
The life span of a battery is approx. 66 hours (alkali battery).
5.1.7
Sensor type: Hall sensor for direct and alternating current.
5.1.8
Temperature coefficient of the measured value:
0.2 x (stated measuring precision)/ °C < 18 °C or > 28 °C, related to the
value for the reference temperature of 23° C.
5.1.9
Largest opening of pliers: 25 mm,
5.1.10 Maximum conductor diameter: 22 mm,
5.1.11
Appliance dimensions: (L x W x H) = 185 x 66 x 40 mm
5.1.12 Appliance weight: 270 g
6.
Environment conditions
-
The BENNING CC 3 is intended for making measurements in dry environ-
ment.
-
Maximum barometric elevation for making measurements: 2000 m,
-
Overvoltage category IEC 60664/ IEC 61010, 600 V category III,
-
Contamination degree 2 according to 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 protec-
tion against water, (0 - second index).
-
Operating temperature and relative humidity:
For operating temperatures from 0 °C to 30 °C: relative humidity less than
80 %
For operating temperatures from 31 °C to 40 °C: relative humidity less than
75 %
For operating temperature from 41 °C to 50 °C: relative humidity less than
45 %
-
Storage temperature: The BENNING CC 3 can be stored at any tempera-
ture in the range from - 20 °C to + 60 °C.
7.
Electrical specifications
Note: The measuring precision is specified as the sum of
-
a relative fraction of the measured value and
-
a current value in A.
The measurement precision applies at a temperature of 23 °C ± 5 °C and a
relative humidity less than 75 %.
7.1 Direct current ranges
Output voltage: 10 mV
Measurement
range
40 A
300 A
*
The measuring accuracy is specified for a sinusoidal curve. The stated pre-
cision is specified for conductors that are centrally clamped by the measur-
ing clamp (see Fig. 2). For conductors that are not centrally clamped, an
additional error of 1 % of the display value needs to be taken into account.
Load impedance:
7.2 Alternating current ranges
Output voltage: 10 mV
08/ 2011
/ A
in the 40 A measuring range
DC
DC
1 mV
/ A
in the 300 A measuring range
DC
DC
Measured value
0 . . . 40 A
40 . . . 200 A
200 . . . 300 A
min. 10 MΩ (input resistance of the multimeter)
/ A
in the 40 A measuring range
AC
AC
1 mV
/ A
in the 300 A measuring range
AC
AC
BENNING CC 3
Output
0 . . . 400 mV
40 . . . 200 mV
200 . . . 300 mV
Measurement precision*
± (1.0 % + 0.2 A)
± (1.0 % + 1 A)
± (1.9 % + 2 A)
9
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