Maintenance
19
Maintenance Procedures
Cleaning
It is important to keep the following surfaces clean:
Socket bore
DC contacts on the element
Teflon insulators
If any of the contacts or line connectors are dirty, clean them with a cotton
swab dipped in commercial contact cleaner or isopropyl alcohol.
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.
Battery
The accuracy of the unit may be reduced by a weak battery. To check the
condition of the battery, set the power switch to BAT. If the pointer does not
swing into the BATTERY TEST region, replace the battery.
Zero Adjust
The meter’s zero setting should be checked when no RF power is present. When
no power is applied the pointer should rest exactly on zero. If adjustment is
required, set the power switch to OFF and turn the zero screw until the pointer
is set at zero (See
Figure
1 on page
1
for screw location).
CAUTION
Do not attempt to remove the RF center conductor. This will damage the line
section.
