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BENNING CM 5-1
02/ 2011
12
Parts subject to wear:
- The BENNING CM 5-1 is fed by a 9 V block battery (IEC 6 LR 61)
- The above-mentioned safety measuring leads (tested accessories) cor-
respond to CAT III 1000 V/ CAT IV 600 V and are approved for a current of
10 A.
4. Description of current clamp multimeter
See figure 1:
Appliance front face
The display and operator control elements specified in Fig. 1 are designated
as follows:
1
Polarity marking
, for assigning the DC current direction by means of the
polarity indication,
2
Bulge of current clamp
, protects against contact with conductor,
3
Opening lever
, for opening and closing the current clamp,
4
AutoSense
, symbolizes the AUTOTEST function,
5
Zero
, null-balance indication for direct current (DC) measurements,
6
APO
, Auto Power Off is activated (device will switch off after 20 minutes),
7
, is indicated if a dangerous voltage is applied > 30 V,
8
Polarity indication
, any polarity opposed to the polarity markings shall be
designated with „-“,
9
Battery status indication
, appears when the battery is discharged,
J
key (grey)
, with the following functions:
-
POWER
, for switching the BENNING CM 5-1 on/ off
-
(AUTO) POWER OFF
, for activating/ deactivating the automatic switch-
off,
-
ZERO balance
, null balance for direct current (DC) measurements,
-
(AUTO) HOLD
, automatic storage of the measured value,
-
HOLD
, storage of the measured value,
K
COM jack
, common socket for voltage, resistance measurement and con-
tinuity testing,
L
Jack
(positive
1
), for V, Ω and
,
M
Range indication
,
N
LoZi
, symbolizes a low input resistance for voltage measurements (4 kΩ ...
375 kΩ),
O
Auto
,
HOLD
and
AutoHOLD
, is displayed if the corresponding storage of
measured values is activated,
Digital display
, for displaying the measured value and range exceedance,
AUTO BACKLIT
, sensor of the automatic background lighting,
Measuring pliers
, for clamping on the single wire current-carrying conduc-
tor,
1
) This is what the automatic polarity indication for DC voltage refers to,
5. General information
5.1 General details on the current clamp multimeter
5.1.1 The digital display
is a 4-digit liquid crystal display with 14 mm high
numerals, complete with decimal point. The largest numerical value
which can be displayed is 9999.
5.1.2 The polarity indication
8
is automatic. Only one polarity with respect to
the socket/ polarity marking
1
marked “-” is indicated.
5.1.3 The BENNING CM 5-1 can be switched on/ off by means of the key
(grey)
J
. For switching it off, press and hold the key for approx. 3
seconds.
5.1.4 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!
5.1.5 Null balance (ZERO)
Press the key (grey)
J
for approx. 1 second to carry out a null balance
for direct current (DC) measurements. The null balance is indicated by
a flashing „ZERO“ symbol
5
on the digital display.
5.1.6 Storage of measured values „HOLD“: The measuring result can be
stored by actuating the key (grey)
J
. The „HOLD“ symbol
O
simultane-
ously appears on the display. By pressing the key
J
again, the device
is switched back to the measuring mode.
With the storage of measured values „HOLD“ being activated, the
multimeter recognizes a measuring signal deviating from the displayed
value, if the measuring signal of the same unit has increased by 50 dig-
its or if a measuring signal of another measuring function is detected.
The change of measuring signal is indicated by a flashing display or by
a continuous acoustic signal.
5.1.7 Automatic storage of measured values „AutoHOLD“ (only for AC/ DC
measurements higher than 3 A): If during switch-on the key (grey)
J
is