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8.
Measuring with the BENNING CM 10-1
8.1 Preparation for measuring
Store and use the BENNING CM 10-1 only under the correct temperature condi-
tions stated. Always avoid longer exposure to sunlight.
-
Check the rated voltage and rated current stated on the safety measuring
leads. The safety measuring leads supplied with the unit are suitable for the
rated voltage and current of the BENNING CM 10-1.
-
Check the insulation of the safety measuring leads. If the insulation is dam-
aged in any way, do not use the leads.
-
Check the continuity of the safety measuring leads. If the conductor in the
safety measuring lead is interrupted, do not use the leads.
-
Before selecting another function with the rotating switch 6 , always discon-
nect the safety measuring leads from the measuring point.
-
Sources of strong current in the vicinity of the BENNING CM 10-1 may cause
unstable or incorrect readings.
8.2 Voltage/ frequency measurement
Do not exceed the maximum permitted voltage with respect to
earth potential!
Please observe the overvoltage category of the electric circuit!
Attach the protective caps (CAT III/IV) to the contact tips be-
fore making measurements in circuits of overvoltage category
CAT III or IV.
Electrical danger!
The highest voltage that may be applied to the jacks
-
COM jack N ,
-
jack + O
of the BENNING CM 10-1 against ground is 600 V CAT IV/ 1000 V CAT III.
8.2.1
Voltage/ frequency measurement (switch position:
-
Use the rotary switch 6 to select the required function
BENNING CM 10-1.
-
Connect the black safety measuring lead to the COM jack N of the BENNING
CM 10-1.
-
Connect the red safety measuring lead to the jack + O of the BENNING
CM 10-1.
-
Bring the safety measuring leads into contact with the measuring points and
read the measured value on the digital display K of the BENNING CM 10-1.
-
In the
function, the MODE key (blue) J can be used for switching over
to frequency measurement (Hz).
-
In the
function, the MODE key (blue) J can be used for switching over
to the mV range.
see fig. 2:
Direct voltage measurement
see fig. 3:
Alternating voltage measurement (frequency measurement)
Note:
On the digital display K , the "LoZ" function (AutoV) is displayed by the "LoZ"
symbol. It automatically determines the required measuring function (AC/ DC
voltage) and the ideal measuring range. Moreover, the input resistance is re-
duced to approx. 3 kΩ in order to suppress inductive and capacitive voltages
(reactive voltages).
8.3 Current/ frequency measurement (switch position
Do not apply any voltage to the input jacks N and O of the
BENNING CM 10-1! Any possibly connected safety measuring
leads have to be removed.
-
Use the rotary switch 6 to select the required function
-
Press the "ZERO" button 5 (2s) to set the BENNING CM 10-1 to the starting
point (only DC coupling mode).
-
Operate opening lever 4 , clamp 1 single wire live conductor centrally by
means of the BENNING CM 10-1 current probe.
function, the MODE key (blue) J can be used for switching over
-
In the
to frequency measurement (Hz).
-
Read off the digital display unit K .
see fig. 4:
Direct/ alternating current measurement (frequency measurement)
8.4 Resistance measurement (switch position
-
Use the rotary switch 6 to select the required function
CM 10-1.
11/ 2019
BENNING CM 10–1
,
, LoZ)
,
,
)
or
)
on BENNING
or LoZ on
.
31
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