General Information - Benning CM 1-4 Bedienungsanleitung

5.

General information

5.1 General information on digital multimeter
5.1.1 The digital display 4 is a 4-digit LC display with a font size of 13 mm and
a decimal point. The highest numerical value to be displayed is 9999.
5.1.2 The polarity indication 4 works automatically. Only a polarity contrary to
the jack definition is indicated with „-". As of 12 V, polarity is indicated by
the -LED or the
5.1.3 The range exceedance is indicated by „OL" or „-OL".
Attention, no other indication and warning in case of overload!
5.1.4 Ω/A key: Press the Ω/A key 6 to switch to the resistance measuring
range (Ω). Press the key again to switch to the current measuring range
(A). Press the key for 2 s to switch back to the voltage measuring range
(display - - - -).
5.1.5 The "HOLD" key 7 has three functions:
- Storage of measured values „HOLD": The measuring result can be
stored by actuating the key 7 . The
pears on the display. By pressing the key 7 again, the device is
switched back to the measuring mode.
- Measuring point illumination: Press and hold the "HOLD" key 7 for
2 s to switch on the LED of the measuring point illumination.
- Acoustic signal for voltage measurement: Press and hold the
"HOLD" key 7 for 5 s to disable the acoustic signal for voltage
measurement, see section 8.3 "Acoustic signal for voltages >50 V
AC/ 120 V DC".
5.1.6 The nominal measuring rate of the BENNING CM 1-4 is 3 measure-
ments per second.
5.1.7 The BENNING CM 1-4 can be switched on by simultaneously pressing
the Ω/A key 6 and the HOLD key 7 . The "- - - -" symbol on the digital
display 4 indicates readiness for voltage measurement, single-pole ex-
ternal conductor test and continuity test. Under the following conditions,
the device switches on automatically:
Batteries with sufficient battery voltage being inserted:
- Measuring voltage between +/L2 jack J and -/L1 jack 9 > 3 V or
< -8 V
- Single-pole external conductor test detects the phase voltage
- Continuity test detects a resistance < 1.8 kΩ to 2.7 kΩ
No batteries being inserted or battery voltage too low:
- Measuring voltage between +/L2 jack J and -/L1 jack 9 >45 V AC
or > | ±35 V DC |
5.1.8 Automatic switch-off ("APO"):
The BENNING CM 1-4 switches off automatically after approx. 10 s if the
following conditions are met:
- No key has been pressed.
- The conditions for automatic switch-on are not met.
The BENNING CM 1-4 switches off automatically after approx. 30 s if the
following conditions are met:
- "OL" is displayed in the resistance measuring range.
- Display value <1 A in the current measuring range
5.1.9 Temperature coefficient of the measured value: 0.2 x (stated measuring
accuracy)/ °C < 18 °C or > 28 °C, related to the value for the reference
temperature of 23 °C.
5.1.10 The BENNING CM 1-4 is supplied by means of two 1.5 V micro batteries
(IEC LR 03).
5.1.11 The battery symbol on the digital display 4 continuously shows the re-
maining battery capacity via a maximum of three segments.
As soon as all segments of the battery symbol have disap-
peared and the battery symbol is flashing, the batteries must be
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replaced by new ones immediately in order to prevent danger
for persons caused by incorrect measurements.
5.1.12 The battery life is sufficient for 1000 tests (alkaline battery, 30 s ON, 240
s OFF).
5.1.13 Dimensions of the BENNING CM 1-4: (L x W x H) = 220 x 57 x 35 mm
Weight: 200 g
5.1.14 The safety measuring leads with the contact tips correspond to the nomi-
nal voltage of the BENNING CM 1-4. The contact tips can be protected
by contact tips protectors and can be snapped onto the bottom of the
device for transport and measuring tasks.
5.1.15 Current clamp opening: 16 mm
09/ 2019
-LED lighting up.
BENNING CM 1–4
symbol simultaneously ap- symbol simultaneously ap-
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