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SECTION II
BEACON MAINTENANCE
2.1. BEACON TESTING.
The beacon should be tested prior to
each use.
2.1.1. Using the 42A12 Series Ultrasonic Test Sets, test the bea-
con in the following manner:
2.1.2. Turn the GAIN control to a fully clockwise position. A
pronounced background noise should be present. Lack of noise
may indicate a dead battery. Should this occur, replace battery in
the test set before resuming operational testing.
2.1.3. Set the TUNING control to approximately midscale. Rub-
bing fingers in front of microphone should produce a rushing noise
from the speaker.
2.1.4. Set the GAIN control at a comfortable listening level.
2.1.5. Point the microphone of the Test Set towards the water
switch end of the beacon for best results. If the beacon is mounted,
position the Test Set for maximum unobstructed signal. Beacon
operation will be indicated by an audible pulsing tone.
