Bird Technologies 3128A - Manual (Page 30)

18
Cleaning
If any of the contacts or line connectors become dirty, they should be wiped off with a clean cloth and a dry cleaning
solvent. Use an aerosol contact cleaner that is self-drying, but forms no residue, on the inaccessible internal parts.
Clean all contact areas and especially the exposed faces of the Teflon insulators.
It is important to keep the following surfaces clean:
•
Socket bore
•
Element body circumference
•
Bottom rim of element body
•
Seat at the base of the socket in the line section
•
DC contacts on the element
The outside surface of the Wattcher can be cleaned with a soft cloth dampened with a mild detergent solution. Do
not wipe the meter glass with a dry cloth, if a static charge could develop causing an erroneous indication on the
meter.
Inspection
Inspect the Wattcher Unit cleanliness, proper adjustment, and with the RF power removed, check the ZERO setting
and adjust if necessary.
Preventive Maintenance
The element socket should be kept plugged as much as possible to prevent the intrusion of dust. If a Plug-In Element
is to be used for this purpose, use the highest power element available. The element should be positioned so that
the ARROW is pointing midway between the FWD and RFL measuring positions. This will not only protect the meter
by shunting the movement, but will also avoid exposing the element’s crystal to dangerous potentials if the RF line
section should be energized.
Line Section Care
WARNING
When using dry cleaning solvents, provide adequate ventilation and observe normal
safety precautions. Many dry cleaning agents emit toxic fumes that may be harmful to
your health, if inhaled.
WARNING
Never attempt to disconnect the transmission line while RF power is being applied.
Leaking RF energy is a potential health hazard..
CAUTION
Do not remove RF center conductor. Placement is critical for proper calibration and
obtaining specified accuracy.