Operation Manual

06/ 2011 BENNING MM 7-1
23
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- Lay the BENNING MM 7-1 on its front and loosen the screw from the cover
of the battery compartment.
- Lift the battery compartment cover (at the recesses in the housing) off the
bottom part.
- Lift the discharged battery out of the battery compartment and remove the
battery leads carefully from the battery.
- Connect the new battery with the battery leads and arrange them in such a
way that they are not crushed between the two halves of the housing. Then
place the battery in the correct position in the battery compartment.
- Clip the battery cover onto the bottom part and tighten the screw.
- Replace the BENNING MM 7-1 in its protective rubber holster

.
See fig. 13: Battery replacement
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Remember the environment! Do not dispose of used batteries
with domestic waste. Dispose of them at a battery-collection
point or as toxic waste. Your local authority will give you the
information you need.
9.4 Fuse replacement
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Before opening the BENNING MM 7-1, ensure that it is not
connected to a source of voltage! Electrical hazard!
The BENNING MM 7-1 is protected from overloading by two integrated melt
fuses (1 A and 10 A rapid acting) (see fig. 14)
To replace the fuses, proceed as follows:
- Disconnect the safety measuring leads from the measurement circuit.
- Disconnect the safety measuring leads from the BENNING MM 7-1.
- Turn the rotating switch

to the “OFF” position.
- Remove the protective rubber holster

from the BENNING MM 7-1.
- Lay the BENNING MM 7-1 on its front and loosen the screw from the cover
of the battery compartment.
- Lift the battery-compartment cover (at recesses in housing) off the bottom part.

Do not loosen any of the screws on the printed circuit of the
BENNING MM 7-1!
- Remove the two outer screws (black) and the two screws beside the printed
circuit from the base of the housing.
- Lift the housing base at the bottom and remove it from the top of the front part.
- Lift one end of the defective fuse out of the fuse holder.
- Push the defective fuse out of the fuse holder completely.
- Replace the defective fuse with another of the same rated power, same
triggering characteristics and same dimensions.
- Push the new fuse into the centre of the holder.
- Arrange the battery leads in such a way that they are not crushed between
the housing parts.
- Clip the housing base into the front part and replace the four screws.
- Clip the battery cover onto the bottom part and tighten the screw.
- Replace the BENNING MM 7-1 in its protective rubber holster

.
See fig. 14: Fuse replacement
9.5 Calibration
To maintain the specified accuracy of the measurement results, the instrument
must be recalibrated at regular intervals by our factory service. We recommend
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
9.6 Spare parts
Fuse F 11 A, 1000 V, 20 kA, D = 10 mm, L = 38.1 mm, P.no. 10016656
Fuse F 440 mA, 1000 V, 10 kA, D = 10 mm, L = 34.9 mm, P.no. 10016655
10. How to use the protective rubber holster
- The safety measuring leads can be stored by coiling them round the protec-
tive rubber holster

and clipping the probe into the holster

so that they
are sufficiently protected (see fig. 15)
- You can clip one lead onto the protective rubber holster

in such a way
that the measuring probe projects. This allows you to bring the measuring
probe and the BENNING MM 7-1 up to the measuring point together.