User guide

4341
L. MAINTENANCE
1. Battery Replacement: The 440 battery pack needs
replacement when it will no longer hold a charge. Battery
is replaced as follows:
a. Disconnect and remove all test leads from live circuits
and from the 440.
b. Remove the five screws from back of the housing.
c. Carefully pull apart the front and rear instrument
housing.
d. Remove old battery pack and replace with new.
e. Reassemble instrument in reverse order from above.
W
ARNING:
• Replace old battery with new 7.2V battery pack.
• Make sure that replaced battery part number is A004.
• To charge the battery, battery eliminator ‘A401’ should be
used.
2. Fuse Replacement: Both the A and µmA input jacks are
fuse protected. If either does not function, replace fuse
as follows:
a. Disconnect and remove all test leads from live circuits
and from the 440.
b. Remove the five screws from the back of housing.
c. Carefully pull apart front and rear instrument housing.
d. Remove old fuse(s) and replace with new fuse(s).
e. Reassemble instrument in reverse order from above
3. Cleaning your 440:
Use a mild detergent and slightly damp cloth to clean the
surfaces of the 440.