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Benning CFlex 2 Manual

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07/ 2014
BENNING CFlex 2
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 2 may be used only in electrical circuits of over voltage
category IV with a maximum voltage of 600 V or of over voltage category III
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 2 comprises:
3.1 One BENNING CFlex 2,
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 BENNING CFlex 2 is a flexible digital TRUE-RMS AC current transformer for measuring
AC currents of 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
HOLD button, storage of the indicated measured value,
MIN/MAX button, storage of the highest and lowest measured values
6
Illumination key, activates the display illumination for approx. 30 seconds
7
Digital display, for displaying the measured value and range exceedance,
8
Battery compartment cover
5. General information
5.1 General details on the AC current transformer
5.1.1 The digital display
7
is a 4-digit liquid crystal display with 13 mm high numerals, com-
plete with decimal point. The largest numerical value which can be displayed is 3150.
5.1.2 In case of a range exceedance (overflow), “-0.L-” is displayed.
Warning, no indication and prior warning in the event of an overload condition!
5.1.3 The rotary switch
is intended for selecting the measuring ranges of 30 A, 300 A and
3000 A AC.
5.1.4 HOLD key function: The measuring result can be stored by pressing the HOLD key
.
The “HOLD” symbol simultaneously appears on the display
7
. Press the key again to
switch the device back to measuring mode.
5.1.5 The MIN / MAX key function
automatically records and stores the highest and the
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