11/ 2008
BENNING MM 7
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trary to the socket definition is indicated, as “-”.
5.1.4 The range overload will be displayed with “OL” or “-OL” and sometimes
with an acoustic signal.
Attention: no display or warning by complete overload.
5.1.5 The “RANGE” button
is for switching the manual measurement range
further on while showing “RANGE” simultaneously in the display. When
the button is pressed for longer (2 sec.), automatic range selection is
selected (“RANGE” disappears from display).
5.1.6 In the rotating-switch functions V, mA and A, the “REL” button
has a
peak-holding function. By pressing it several times, the “peak MAX” and
“peak MIN” values are shown alternately. When the button is pressed
for 2 sec. it switches back to normal mode. Before switching on the
peak hold function, calibrate the unit. To do this, short-circuit the tips of
the measuring leads and keep the button pressed until “CAL” appears
in the display. With AC, no polarity is shown. In all the other switch
positions (Ω, Hz,
, °C, °F) the “REL” button has a relative-value
function. When the button is pressed, the measurement value
applied is stored and the difference (offset) between this and the follow-
ing values displayed. When it is pressed again, the stored value is
displayed with a flashing “REL” symbol. When the button is pressed for
2 sec., the unit switches back into the normal mode.
5.1.7 The “MIN/MAX” button
function records and stores the highest and
lowest measurements automatically. By pressing the button several
times, the following values are shown: Flashing display “MAX/MIN”
shows the current measurement value, “MAX” shows the highest value
stored and “MIN” the lowest value stored. When the button is pressed
for 2 sec. the unit switches back to normal mode. Functional standby is
possible only in “RANGE” mode.
5.1.8 “HOLD” - storage of measurement reading: When the “HOLD” button
is
pressed, the measurement reading is stored in the memory. The sym-
bol “HOLD” appears in the display at the same time. When the button is
pressed a second time, the unit switches back to measurement mode.
5.1.9 The yellow button
switches the display illumination on. To switch it off,
press the yellow button again.
5.1.10 When the rotating switch is at V, mA and A, the blue button
switches
between DC and AC operation. In position Ω, it switches from resist
-
ance measurement to continuity testing and when pressed another
time, to diode testing. In switch position Hz, it switches from frequency
measurement to RPM mode. The RPM mode is equivalent to a math-
ematical conversion from Hz (cycles per second) to RPM (rotations/
cycles per minute). 1 Hz is equivalent to 60 r.p.m. (rotations/cycles per
minute).
5.1.11 The nominal measurement rate of the BENNING MM 7 is 2 measure-
ments per sec. for the digital display and 12 measurements for the bar
graph display.
5.1.12 The BENNING MM 7 is switched on and off by the rotating switch
.
Switch-off position “OFF”.
5.1.13 The BENNING MM 7 switches off automatically after approx. 30 minutes
(
APO
,
A
uto-
P
ower-
O
ff). It switches back on again when the HOLD
button (or another button, apart from the yellow button) is pressed. A
buzzer is heard 15 sec. before it switches off automatically.
5.1.14 Temperature coefficient of measurement value: 0.15 x (stated meas-
urement accuracy)/ °C < 18 °C or > 28 °C relative to the value at the
reference temperature of 23 °C.
5.1.15 The BENNING MM 7 is powered by one 9-V block battery (IEC 6 LR 61).
5.1.16 When the battery voltage drops beneath the specified operating voltage
of the BENNING MM 7, the low battery symbol appears in the display.
5.1.17 The life span of a battery is approx. 300 hours (alkali battery).
5.1.18 Dimensions:
(L x W x H) = 180 x 88 x 33.5 mm without protective rubber holster
(L x W x H) = 188 x 94 x 40 mm with protective rubber holster
Weight:
300 g without protective rubber holster
440 g with protective rubber holster
5.1.19 The safety test leads are 4 mm plug-type leads. The safety test
leads are expressly suitable for the rated voltage and power of the
BENNING MM 7.
5.1.20 The BENNING MM 7 is protected against mechanical damage by a
protective rubber holster
. The protective rubber holster
makes it
possible to suspend the BENNING MM 7 during the measuring process
or to stand it upright.
