Benning CM 8 Operating Manual page 22

- The safety measuring leads mentioned above (tested accessories, 044145)
comply with CAT III 1000 V and are approved for a current of 10 A.
4. Device description
See figure 1:
The display and operating elements shown in figure 1 are designated as follows:
1 Digital display, displaying measured value and range exceedance,
2 Polarity indication,
3 Battery indication, appears in case of discharged battery,
4 Key (yellow), display illumination,
5 Key (blue), change-over key, measuring type
6 INRUSH/ MAX­MIN key, inrush current (AC A) detection/ storage of the
highest and lowest measuring value,
7 PEAK/ Hz­THD key, peak value storage/ frequency measurement,
8 Rotary switch, for selecting the measuring function,
9 Jack (positive
J COM jack, common jack for voltage/ frequency/ resistance measurements,
diode tests and continuity tests,
K Opening lever, for opening and closing the current clamp,
L Bulge for current clamp, protects against contact with conductor,
M Measuring clamp, for clamping on the single-wire live conductor,
N HOLD/ DCA ZERO key, storage of the displayed measured value/ null bal-
ance for A DC current measurements,
1
) This is what the automatic polarity indication for DC voltage refers to
5. General information
5.1 General information on the current clamp multimeter
5.1.1 The digital display 1 is a 3
a decimal point. The highest numerical value to be displayed is 6000.
5.1.2 The polarity indication 2 works automatically. Only a polarity contrary
to the jack definition is indicated with „-".
5.1.3 The range exceedance is indicated by „OL" or „-OL" and partly by an
acoustic warning.
Attention, no indication and warning in case of overload!
5.1.4 By means of the yellow key 4, the display illumination can be activated.
It can be deactivated by pressing the key again or it is deactivated au-
tomatically after 30 seconds. By pressing the yellow key 4 for approx.
2 seconds, the battery voltage is briefly indicated in V.
5.1.5 The „HOLD/ DCA ZERO" key N has two functions: By pressing the
„HOLD/ DCA ZERO" key N, the measuring result can be stored. The
„HOLD" symbol simultaneously appears on the display. By pressing the
key N again, the device is switched back into measuring mode. The
HOLD function is available for all measuring types.
By pressing the „HOLD/ DCA ZERO" key N for approx. 2 seconds, the
device and the display indication are balanced to null in the DC A cur-
rent measuring range (rotary switch 8 and blue key 5, if necessary).
5.1.6 The „INRUSH/ MAX-MIN" key 6 has two functions: In measuring type
„AC A" (rotary switch 8 and blue key 5, if necessary), the measuring
mode „INRUSH Current" is activated by pressing the key 6. Here, the
measuring process is initiated for 100 milliseconds after a current is
applied. The averaged value of this time period is displayed. The MAX-
MIN function is started by pressing the „INRUSH/ MAX-MIN" key for
approx. 2 seconds.
By means of the MAX-MIN key function 6, the highest and the lowest
measured value is stored automatically. By pressing the key, the follow-
ing values are displayed:
„MAX" displays the highest value stored and „MIN" displays the lowest
value. The continuous detection of the MAX-MIN value can be stopped
or started by pressing the „HOLD" key N. By pressing the „MAX-MIN"
key for approx. 2 seconds, the instrument is switched back to normal
operating mode.
The MAX-MIN function is available for all measuring types. When using
the MAX-MIN function, the APO (Auto-Power-Off) function is deacti-
vated.
5.1.7 The „PEAK/ HZ-THD" key 7 has three functions:
In V AC and A AC measuring type (rotary switch 8 and blue key 5, if
necessary), the peak value storage is activated by pressing this key.
Here, the positive and the negative peak / crest value are detected and
displayed. By pressing the key 7, the values of „Peak Max" or „Peak
Min" are displayed. The continuous detection of the peak value storage
can be stopped or started by pressing the „HOLD" key N. By pressing
the key for approx. 2 seconds, the instrument is switched back to nor-
02/ 2019
Device front
1
), for V and Ω
5
BENNING CM 8
/ -digit LC display with a font size of 14 mm and
6
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14