Bird Technologies 4421 - Manual (Page 47)

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Chapter 6 Maintenance
This chapter describes routine maintenance, along with troubleshooting
instructions for the power meter and power sensor. Disassembly instructions
for the Bird Cal Cart are also provided. For service beyond this level, return
the unit to a qualified service center.
The Bird 4421 Power Meter requires only simple, routine maintenance.
z Wipe off dust and dirt regularly.
z Check the connectors and cables for damage.
z Clean the connector contacts with alcohol or dry cleaning solvent.
Cleaning
Clean the Bird 4421 Power Meter and its display with a soft cloth dampened
with mild detergent and water only. Clean sensors with a dry cleaning solvent
that leaves no residue.
Troubleshooting
Since the power meter and power sensor can only work together, the first step
is to determine which is malfunctioning. Connect the power sensor to the
meter and perform the functional test on page 37. If the power meter is mal-
functioning, refer to the troubleshooting table below. If the power sensor is
malfunctioning, return it for service.
This manual cannot list all malfunctions that may occur, or corrective actions.
If a malfunction is not listed or is not corrected by the listed corrective actions,
contact a qualified service center.
 Note: For power sensors in Cal Carts, following the test procedure
will check the sensor not covered by the safety cover. To test the other
sensor slide the safety cover over, then proceed as normal.
WARNING
To avoid personal injury, disconnect the power cord from the AC line before
performing any maintenance, including fuse replacement or changing the
line voltage setting.
WARNING
Never attempt to connect or disconnect RF equipment from the transmission
line while RF power is being applied.
Leaking RF energy is a potential health hazard.
WARNING
The Bird 4421 contains no user-serviceable parts. Do not remove its cover.
CAUTION
Do not use harsh or abrasive detergents for cleaning.
CAUTION
Due to the complexity of the Bird Power Sensor, field repairs beyond general
maintenance should not be attempted.
Removal or disturbance of the power sensor cover can result in cancellation
of lifetime warranty.