General Information - Benning CM E1 Bedienungsanleitung

see figure 2: Digital display
The symbols shown in fig. 2 are designated as follows:
A Secondary display, for function selection and storage location number
B Digital display, for measured value, alarm threshold, sampling rate
C Ω Ohm, unit of loop resistance measurement
D mA, unit of current/ leakage current measurement
, loop resistance measurement with acoustic alarm function
E
F NOISE, detection of interfering signals, measurement might be affected
, measuring clamp is not closed correctly
G
, battery status indication
H
I NO., storage location number
J REC, data logger is enabled
K AP, automatic switch-off is enabled (APO active)
5. Functions of the earth measuring clamp

5.1 General information

5.1.1 The digital display B is a 4-digit LC display with a font size of 11 mm and a decimal point. The
highest numerical value to be displayed is 9999.
5.1.2 The range exceedance is indicated by „OL".
Attention, no other indication and warning in case of overload!
5.1.3 The rotary switch 3 is intended for selecting the measuring function. The selection of the measur-
ing range is automatic.
5.1.4 HOLD key function: The measuring result can be stored by pressing the HOLD key 2 . The "H"
symbol simultaneously appears on the display 4 .
5.1.5 REC key function: for starting the data logger or storing a measured value in the internal memory
5.1.6 FUNC function key: function key for selecting the alarm thresholds "HI" (high), "LO" (low), the
sampling rate "SEC" (seconds) and storage location number "NO." (1-116)
5.1.7 The nominal measuring rate of the BENNING CM E1 is 2 measurements per second.
5.1.8 The BENNING CM E1 is switched on and off with the rotary switch 3 . Shutdown position "OFF".
The BENNING CM E1 switches off automatically after approx. 4 min. to 6 min. (APO, Auto-Power-
5.1.9
Off is enabled if the "AP" symbol K is shown on the display 4 ).
It switches on again as soon as the rotary switch 3 is switched on again from switch position
"OFF". Automatic switch-off can be deactivated by pressing the FUNC key and by simultaneously
switching on the BENNING CM E1 from the switching position "OFF". The symbol AP K disap-
pears from the display 4 .
5.1.10 The BENNING CM E1 is supplied by a fitted 9 V block battery (IEC 6 LR 61).
5.1.11 If the battery voltage drops below the specified operating voltage of the BENNING CM E1, then a
battery symbol H appears in the display 4 .
5.1.12 The battery life depends on the measuring function used and is intended for approx. 3000 mea-
surements.
5.1.13 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.
5.1.14 Dimensions of unit (length x width x height) = 276 x 100 x 47 mm
Weight of unit: approx. 750 g (incl. battery)
5.1.15 Widest prong opening: 38 mm
5.2 Setting the alarm thresholds of the earth loop resistance
To measure the earth loop resistance, an upper (HI) and lower (LO) alarm threshold can be set. Use the
rotary switch 3 to select the function Ω and press the FUNC key 9 until the "HI" symbol or "LO" symbol
appears on the secondary display A. By pressing the ▼ key 6 and the ▲ key 8 , the alarm threshold can
be set from 0 ohms to 1510 ohms or "OL" respectively. After having set one alarm threshold or both, press
the FUNC key 9 until the symbols on the secondary display A disappear.
As soon as the rotary switch position Ω+
value with the upper and lower alarm thresholds.
If the displayed value is higher than the upper alarm threshold, a pulsating acoustic signal is emitted and
the "HI--" symbol is displayed.
If the displayed value is lower than the lower alarm threshold, a pulsating acoustic signal is emitted and
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is selected, the earth measuring clamp compares the displayed
BENNING CM E1
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