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Benning CM7 Manual

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09/ 2013
BENNING CM 7
11
COM jack, common socket for voltage, resistance measurement and con-
tinuity testing,
Opening lever, for opening and closing the current probe.
Bulge of current probe, protects against contact with conductor.
Measuring pliers, for clamping on the single wire current-carrying conductor.
HOLD button, storage of the indicated measured value,
1
) This is what the automatic polarity indication for DC voltage refers to
5. General information
5.1 General details on the current probe multimeter
5.1.1 The digital display is a 3 ¾- digit liquid crystal display with 14 mm
high numerals, complete with decimal point. The largest numerical
value which can be displayed is 4000.
5.1.2 The polarity indication is automatic. Only one polarity with respect to
the socket marked “-” is indicated.
5.1.3 The overranging is indicated by “0L” or “- 0L” and, in part, an acoustic
warning.
Warning, no indication and prior warning in the event of an overload
condition!
5.1.4 Button (yellow) switches on the display illumination. Shutdown is
effected by a renewed press of the button or automatically after 60
seconds.
5.1.5 ZERO key (zero balance key)
Press the key to perform a zero balance for direct current (DC)
measurements. This can be used as well for differential measuring in
the resistance or frequency range. Indication by “REL” on the digital
display. Press the key again to indicate the stored difference (Offset).
The indication “REL” on the digital display is flashing. Press and hold
the key (approx. 2 seconds) to switch back to the measuring mode.
5.1.6 Measured value storage “HOLD”: Press the button “HOLD” to store
the measured result. At the same time, the display shows the symbol
“HOLD”. A renewed press of the button switches back into measuring
mode.
5.1.7 The MIN/ MAX button function inputs and stores automatically the
highest and lowest measured value. The following values are indicated
by button operation:
“MAX” indicates the stored maximum value, and “MIN” indicates the
lowest value. The continuous detection of the MAX-/ MIN value can
be stopped or started by pressing the button “HOLD” . Pressing the
button “MIN/MAX” for an extended period of time (2 seconds) switches
back into normal mode.
5.1.8 The button PEAK (peak value storage) detects and stores the posi-
tive and negative peak/ crest value in the function V AC and A AC. At
the start of the measurement, press the button PEAK for approx. 3
seconds in order to increase measurement precision and to fine-adjust
the BENNING CM 7. Pressing the button indicates the “PMAX” or
“PMIN” values in the display. An extended operation (2 seconds) of the
button PEAK switches back into a standard mode.
5.1.9 The measuring rate of the BENNING CM 7 amounts nominally to 1.5
measurements per second for the digital display.
5.1.10 The BENNING CM 7 is switched on and off with the rotary switch .
Shutdown position “OFF”.
5.1.11 The BENNING CM 7 switches off automatically after approx. 30 minutes
(APO, Auto-Power-Off). It switches back on again if a button or the
rotary switch is operated. A buzzer tone signals automatic switchoff of
the appliance. The automatic switchoff can be deactivated by pressing a
button (except the button “HOLD”) and simultaneously switching on the
BENNING CM 7 from switch position “OFF”.
5.1.12 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.
5.1.13
The BENNING CM 7
is supplied by a fitted 9 V block battery (IEC 6 LR 61)
.
5.1.14 If the battery voltage drops below the specified operating voltage of the
BENNING CM 7, then a battery symbol appears in the display.
5.1.15 The life span of a battery amounts to approx. 100 hours (alkali battery).
5.1.16 Appliance dimensions:
(L x W x H) = 275 x 105 x 51 mm
Appliance weight: 534 g
5.1.17 The safety measuring cables supplied are expressly suited for the rated
voltage and the rated current of the BENNING CM 7.
5.1.18 Largest opening of pliers: 53 mm
5.1.19 Largest cable diameter: 51 mm
… 17 …


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