Replacing The Battery; Battery Installation; Replacing The Fuses - Bosch MMD 540H Mode D'emploi

30 | MMD 540H Hybrid Multimeter | Maintenance
Maintenance

Replacing the Battery

WARNING: To avoid electric shock, disconnect the test leads
from any source of voltage before removing the battery door.
1. When the batteries become exhausted or drop below the
operating voltage, "BAT" will appear in the right-hand side of the
LCD display. The battery should be replaced.
2. Follow instructions for installing battery. See the Battery
Installation section of this manual.
3. Dispose of the old battery properly.
WARNING: To avoid electric shock, do not operate your meter
until the battery door is in place and fastened securely.

Battery Installation

WARNING: To avoid electric shock, disconnect the test leads
from any source of voltage before removing the battery door.
1. Disconnect the test leads from the meter.
2. Open the battery door by loosening the screw using a Phillips
head screwdriver.
3. Insert the battery into battery holder, observing the correct
polarity.
4. Put the battery door back in place. Secure with the two screws.
WARNING: To avoid electric shock, do not operate the meter
until the battery door is in place and fastened securely.
NOTE: If your meter does not work properly, check the fuses and
battery to make sure that they are still good and that they are
properly inserted.
Robert Bosch LLC MMD 540H Instruction Manual | Version 1 | December 2010
MMD 540H Hybrid Multimeter | Maintenance | 31

Replacing the Fuses

WARNING: To avoid electric shock, disconnect the test leads
from any source of voltage before removing the rear cover (fuse
door).
1. Disconnect the test leads from the meter and any item under
test.
2. Open the fuse door by loosening the screws on the rear cover
using a Phillips head screwdriver.
3. Remove the old fuse from its holder by gently pulling it out.
4. Install the new fuse into the holder.
5. Always use a fuse of the proper size and value (0.5A/250V -Ø5
x 20 , fast blow for the 400mA range, 20A/250V –Ø6.3 x 32 fast
blow for the20A range). Commonly available at local electronics
retailers and Radio Shacks.
6. Put the fuse door back in place. Insert the screw and tighten it
securely.
WARNING: To avoid electric shock, do not operate your meter
until the fuse door is in place and fastened securely.
MMD 540H Instruction Manual | Version 1 | December 2010 Robert Bosch LLC