Battery Replacement; Fuse Replacement - Benning MM 3 Manuel De Instrucciones

9.3 Battery replacement


Remove test leads and turn the power off before opening the
BENNING MM 3! Dangerous voltage!
The BENNING MM 3 is powered by a 9 V block battery. Battery replacement
(see figure 11 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 3.
- Turn the rotary switch  to the "OFF" position.
- Remove the protective rubber holster  from the BENNING MM 3.
- Place the BENNING MM 3 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 .
- 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 3 back into its protective rubber holster .
see Figure 11:
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 3! Dangerous voltage!
The BENNING MM 3 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 12).
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 3.
- Turn the rotary switch  to the "OFF" position.
- Remove the protective rubber holster  from the BENNING MM 3.
- Place the BENNING MM 3 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 3!
- 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 3 back into its protective rubber holster  again.
see Figure 12:
09/ 2013
Battery replacement
Fuse replacement
BENNING MM 3

17