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Benning CFlex 1 Manual

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07/ 2014
BENNING CFlex 1
7
2. Safety note
The instrument is built and tested in accordance with
DIN VDE 0411 part 1/ EN 61010-1
DIN VDE 0411 part 2-032/ EN 61010-2-032
DIN VDE 0411 part 031/ EN 61010-031
and has left the factory in perfectly safe technical condition.
To maintain this condition and to ensure safe operation of the unit, the user must observe the
notes and warnings given in these instructions at all times. Improper handling and non-obser-
vance of the warnings might involve severe injuries or danger to life.
WARNING! Be extremely careful when working with bare conductors or main
line carrier! Contact with live conductors will cause an electric shock!
The BENNING CFlex 1 may be used only in electrical circuits of over voltage
category III with a maximum voltage of 600 V or of over voltage category II with
a maximum voltage of 1000 V between the conductor and ground.
Remember that work on electrical components of all kinds is dangerous. Even
low-voltages of 30 V AC and 60 V DC may be dangerous to human life.
Before starting the unit, always check it as well as all measuring lead and
wires for signs of damage.
Should it appear that safe operation of the unit is no longer possible, it should be shut down
immediately and secured to prevent that it is switched on accidentally.
It may be assumed that safe operation is no longer possible:
- if the device or the measuring lead exhibit visible damages,
- if the unit no longer works,
- after long periods of storage under unfavourable conditions,
- after being subject to rough transportation, or
- if the device or the measuring lead are exposed to moisture.
3. Scope of delivery
The scope of delivery for the BENNING CFlex 1 comprises:
3.1 One BENNING CFlex 1 with one firmly connected safety measuring lead with 90° offset
4 mm safety plugs,
3.2 One compact protective pouch,
3.3 Two 1.5 V batteries of type AAA (IEC LR 03)
3.4 One operating manual
4. Description of AC current transformer
The flexible AC current transformer BENNING CFlex 1 is a measuring adapter for analog and
digital multimeters and is intended for AC current measurements up to 3000 A.
See figure 1: Appliance front face
The display and operator control elements specified in Fig. 1 are designated as follows:
Flexible measuring loop, for clamping the single-wire AC current-carrying (live) conductor
Closing mechanism of the measuring loop
Rotary switch, for selecting the measuring ranges
Output with 4 mm safety plugs, red, black, 90° offset
Green LED (“ON” LED), lights when the device is switched on
6
Red LED (battery indication), lights in case of discharged battery
7
Battery compartment cover
5. General information
5.1 General details on the AC current transformer
5.1.1 The rotary switch
is intended for selecting the measuring ranges of 30 A, 300 A and
3000 A AC.
5.1.2 The BENNING CFlex 1 is supplied by means of two 1.5 V batteries of type AAA (IEC
LR03).
5.1.3 If the battery voltage falls below the specified operating voltage of the BENNING CFlex 1,
the red LED (battery indication)
6
lights.
5.1.4 The battery life is approx. 120 hours (alkaline battery).
5.1.5 Temperature coefficient of the measured value:
0.1 x (stated measuring accuracy)/ °C < 18 °C or > 28 °C, related to the value for the
reference temperature of 23 °C
… 11 …


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