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Benning MM 1.2 Manual

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9. Maintenance
BeforeopeningtheBENNINGMM1-1/1-2/1-3,makesurethat
thedeviceisfreeofvoltage!Electricaldanger!
Working on the opened BENNING MM 1-1/ 1-2/ 1-3 under voltage must be car-
ried out by skilledelectricianswithspecialprecautionsfortheprevention
ofaccidentsonly!
Make sure that the BENNING MM 1-1/ 1-2/ 1-3 is free of voltage as described
below before opening the device:
- First, remove both safety measuring leads from the object to be measured.
-
Then, remove both safety measuring leads from the BENNING MM 1-1/ 1-2/ 1-3.
- Switch the rotary switch 8 to position „OFF“.
9.1 Securing the device
Under certain circumstances, safe operation of the BENNING MM 1-1/ 1-2/ 1-3
might no longer be ensured, e.g. in case of:
- visible damages of the housing,
- incorrect measuring results,
- recognizable consequences of prolonged storage under inadmissible condi-
tions and
- recognizable consequences of extraordinary stress due to transport.
In such cases, immediately switch off the BENNING MM 1-1/ 1-2/ 1-3, discon-
nect it from the measuring points and secure it against further use.
9.2 Cleaning
Clean the exterior of the device with a clean dry cloth (exception: special
cleaning wipers). Do not use any solvents and/or abrasives to clean the device.
Make sure that the battery compartment and the battery contacts are not con-
taminated by leaking battery electrolyte.
If there are electrolyte contamination or white deposits in the area of the battery
or the battery compartment, clean these areas as well by means of a dry cloth.
9.3 Batteryreplacement
BeforeopeningtheBENNINGMM1-1/1-2/1-3,makesurethat
thedeviceisfreeofvoltage!Electricaldanger!
The BENNING MM 1-1/ 1-2/ 1-3 is supplid by means of two integrated 1.5 V
micro (AAA) batteries.
Battery replacement (see gure 13) is required, if the battery symbol appears
on the display .
Proceed as follows to replace the battery:
- Disconnect the safety measuring leads from the measuring circuit.
- Disconnect the safety measuring leads from the BENNING MM 1-1/ 1-2/ 1-3.
- Switch the rotary switch 8 to position „OFF“.
- Put the BENNING MM 1-1/ 1-2/ 1-3 face down and unscrew the screw of
the battery compartment cover.
- Lift off the battery compartment cover from the bottom part of the battery
compartment.
- Remove the discharged batteries from the battery compartment.
- Insert the new batteries into the battery compartment observing correct po-
larity.
- Lock the battery compartment cover into place on the bottom part and
tighten the screw.
See gure 13: Battery replacement
Makeyourcontribution for environmentalprotection! Do not
dispose of discharged batteries via the household waste.
Instead,return themtoacollectingpointfordischarged bat‑
teries or special waste. Please look for information in your
community‘sfacilities.
9.4 Fuse replacement (BENNING MM 1-2/ 1-3)
BeforeopeningtheBENNINGMM1-2/1-3,makesurethatthe
deviceisfreeofvoltage!Electricaldanger!
The BENNING MM 1-2/ 1-3 is protected against overload by means of an inte-
grated fuse (G fusible insert) 10 A (see gure 14). Proceed as follows to replace
the fuse:
09/ 2013
BENNING MM 1-1/ 1-2/ 1-3
… 29 …


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