Bird Technologies APM-16 - Manual (Page 31)

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Chapter 5 Maintenance
The rugged and simple design of the Bird APM-16 means that it requires mini-
mal routine maintenance.
Troubleshooting
The following table contains troubleshooting information for problems that can
occur during normal operation. Find the problem on the table, review possible
causes, and perform the corrective action listed.
This manual does not list all malfunctions that may occur, or all corrective
actions. If a malfunction is not listed or not corrected by the listed actions, con-
tact the nearest Bird Service Center for assistance.
Problem Possible Cause Corrective Action
No meter reading No RF power Check RF source
“Arrow” on element
pointing wrong way Rotate element
Battery drained Check the battery and
replace if necessary
DC contact bent Adjust contact (page 20)
Open or short circuit in
meter leads Replace defective leads
Meter burned out or
damaged Return wattmeter for ser-
vice
Intermittent or
inconsistent meter
readings Dirty DC contact on ele-
ment Clean contact (page 20)
Faulty transmission line
or antenna Inspect line
Sticky or defective
meter Return wattmeter for ser-
vice
High VSWR or
reflected power Foreign material in line
section or in RF connectors Clean connectors (page 20)
Open or shorted trans-
mission line Inspect line
Bad load or poor con-
nectors Inspect load, antenna, and
connectors