Model 3440 Appendix A–1
A
A
p
p
p
p
e
e
n
n
d
d
i
i
x
x
A
A
:
:
M
M
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
&
&
T
T
r
r
o
o
u
u
b
b
l
l
e
e
s
s
h
h
o
o
o
o
t
t
i
i
n
n
g
g
This appendix covers the following topics and tasks:
9 Troubleshooting and error messages
9 Changing the display contrast
9 Maintaining and servicing your gauge
9 Charging and replacing the battery
9 Replacement parts list
9 Cleaning the gauge
9 Lubricating the source rod
9 Replacing the gasket and O-Ring
9 Returning the gauge for service