Securing The Device; Battery Replacement - Benning MM 1-3 Bedienungsanleitung

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
carried out by skilled electricians only who must observe special precau‑
tions for the prevention of accidents!
Therefore, make sure the BENNING MM 1-1/ 1-2/ 1-3 is free of voltage before
opening the device:
- First, remove both safety measuring lines from the object to be measured.
- Then, remove both safety measuring lines 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
conditions and
- recognizable consequences of extraordinary stress due to transport.
In such cases, immediately switch off the BENNING MM 1-1/ 1-2/ 1-3, disconnect
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 contaminated
by leaking battery electrolyte.
If there are electrolyte contamination or white deposits in the area of the battery
or the battery housing, 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 figure 13) is required, if the battery symbol  appears
on the display .
Proceed as follows to replace the battery:
- Disconnect the safety measuring lines from the measuring circuit.
- Disconnect the safety measuring lines 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
polarity.
- Lock the battery compartment cover into place on the bottom part and
tighten the screw.
See figure 13:
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
11/ 2007
Battery replacement
BENNING MM 1‑1/ 1‑2/ 1‑3

20