Maintenance
29
If the RF line section seems dirty, do not loosen any connections.
Clean accessible components as described above and use dry, clean air
to blow out the interior.
The outside of the meter housing can be cleaned with a soft cloth
dampened with a mild detergent solution. Do not wipe the meter glass
with a dry cloth, or a static charge could develop that would cause an
erroneous meter indication.
Contact Adjustment
When cleaning the socket bore, do not disturb the spring finger of the
dc contact. If necessary, the contact can be adjusted manually. The
button must be out far enough to maintain good contact, but not so far
as to interfere with easy entry of the element body. To remove the dc
jack and spring finger:
y Unscrew both 4-40 fillister head screws holding the jack assembly
against the side of the RF line section.
y Retract the assembly. Be careful not to lose the small teflon bead
that straddles the base of the spring and nests in a counterbore on
the side of the line section.
y Replace the assembly (make sure that the bead is properly inserted)
and the two screws.
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