storm height, size, and relative direction of movement.
4.0PREFLIGHT (PFT)
4.1PREFLIGHT WARNING
Test the system to verify proper operation before each flight. Rotate the
function selector from OFF to STBY. Allow system to warm up for about 100
seconds, then move the function selector to TEST. No display appears in
the STBY position and the radar does not transmit in either STBY or TEST.
The test pattern scans 120° and automatically selects the 80 mile range.
Look for distinct color bands and range marks in the order shown. Adjust
display brightness for a comfortable level. Checklist and flight log options
may be used at this time if installed.
WARNING
Do not turn the radar on within 25 feet of ground personnel or
containers holding flammable or explosive material. The radar
should never be operated during refueling.
When ready to use the radar, rotate the function selector to ON position.
Figure 4.1-1.Preflight Warnings
Note
+The design of the system is such that full operation is possible
approximately two minutes after turn-on. Therefore, the pilot may
choose to leave the function switch in OFF, rather than STBY, if no
significant weather is in the immediate area of the aircraft. The life
of the magnetron transmitting tube will be extended by leaving the
system “OFF” when possible. This, in turn, will reduce the cost of
maintenance.
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