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08/ 2008
BENNING MM 1
13
9.1 Instrument safe-guarding
In certain circumstances, safety during the use of the BENNING MM 1 can no
longer be guaranteed; when for instance:
- there is visible damage to the housing
- measurement errors occur
- the instrument has been subjected to prolonged storage under unfavorable
conditions and
- the instrument has been subjected to severe transport stresses.
In such cases the BENNING MM 1 must be immediately switched off, removed
from the measurement points and secured against any future unintentional
operation.
9.2 Cleaning
Wipe the case of the BENNING MM 1 with a clean dry cloth (exception: spe-
cial cleaning cloths). Do not use any solvents and/or abrasives to clean the
BENNING MM 1.
9.3 Battery replacement
Remove test leads and turn the power off before opening the
BENNING MM 1! Dangerous voltage!
The BENNING MM 1 is powered by two 1.5 V batteries. Battery replacement
(see figure 8 below) becomes necessary when the low battery indicator
shows in the display
.
This is how to change the battery:
- Remove the safety test leads from the measured circuit.
- Remove the safety test leads from the BENNING MM 1.
- Turn the rotary switch
to the "OFF" position.
- Remove the protective rubber holster
from the BENNING MM 1.
- Place the BENNING MM 1 on its front side and remove the screw from the
case back.
- Lift the end of the case back near the input terminals until it gently unsnaps
from the case front at the end nearest to the LCD display
.
- Remove the empty batteries from inside the battery holders.
- Insert new batteries correctly into the battery holder.
- Press the case back and case front together again and reinstall the screw.
- Place the BENNING MM 1 back into its protective rubber holster
.
see Figure 8:
Battery replacement
Please contribute to environmental protection! Batteries should
not be thrown into domestic refuse bins! They can be discarded
at collection points for old batteries or special refuse. Please
contact your municipality for more information.
9.4 Calibration
To maintain the specified precision of the measurement results, the instrument
must be recalibrated at regular intervals by our factory service. We recom-
mend a recalibration interval of one year. Send the appliance to the following
address:
Benning Elektrotechnik & Elektronik GmbH & CO. KG
Service Centre
Robert-Bosch-Str. 20
D - 46397 Bocholt
10. How to use the protective rubber holster
- The safety test leads can be stored by wrapping them around the protec-
tive rubber holster
and then clipping the probes into the protective probe
holders on the rear of the holster
(see figure 9).
- A safety test lead can be clipped into the probe holder on the protective
rubber holster
with the test probe protruding, in order to apply the probe
together with the BENNING MM 1 to a measuring point (see figure 10).
- The rear tilt stand on the protective rubber holster
allows the
BENNING MM 1 to be placed standing upright (for easier display reading)
or hung up (see figure 11).
- The protective rubber holster
can also be hung on a nail if so desired.
see Figure 9:
Wrapping up the safety test leads
see Figure 10:
Protective rubber holster with one probe free for single
handed operation
see Figure 11:
Standing up the BENNING MM 1