09/ 2013
BENNING MM 2
15
- 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 battery from inside the case front and carefully discon-
nect it from the battery connector leads.
- Snap the battery connector leads to the terminals of a new battery and
reinsert the battery into the case front. Ensure that the battery leads do not
become pinched between the case back and case front.
- Press the case back and case front together again and reinstall the three
screws.
- Place the BENNING MM 2 back into its protective rubber holster
.
see Figure 9:
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 Fuse replacement
Remove test leads and turn the power off before opening the
BENNING MM 2! Dangerous voltage!
The
BENNING MM 2 is protected from overloading by a built-in 1 A
(G-cartridge) fast blow fuse and a built-in 16 A (G-cartridge) fast blow fuse
(see figure 10).
This is how to replace the fuses:
- Remove the safety test leads from the measured circuit.
- Remove the safety test leads from the BENNING MM 2.
- Turn the rotary switch
to the "OFF" position.
- Remove the protective rubber holster
from the BENNING MM 2.
- Place the BENNING MM 2 on its front side and remove the three screws
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
.
Do not remove any screws from the printed circuit board of the
BENNING MM 2!
- Lift the printed circuit board from the front case.
- Gently pry one end of the defective fuse loose from the fuse holder.
- Then slide the defective fuse completely out of the fuse holder.
- Install a new fuse of the same rating, fast acting characteristic and size.
- Make sure the new fuse is centered in the fuse holder.
- Replace the printed circuit board into the case front.
- Ensure that the battery leads do not become pinched between the case
back and case front.
- Press the case back and case front together again and reinstall the three
screws.
- Place the BENNING MM 2 back into its protective rubber holster
.
see Figure 10:
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 16 A, 500 V, D = 6.35 mm, L = 32 mm, part no. 749770
Fuse F 1 A, 500 V, D = 6.35 mm, L = 32 mm, part no. 749669
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 11).
- 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 2 to a measuring point .
