Sperry Marine 5016-CA, Operation, Installaion And Service Manual

Page: 33 / 132

Analogue Compass Repeaters 056376/A
Synchronizing the Compass Cards 2-5
2.6 Synchronizing the Compass Cards
The analogue repeaters are self-synchronizing. They do not normally
require any user intervention to re-synchronize the compass card indica-
tion with the actual heading received.
However, the position offset counter may occasionally get out of syn-
chronization with the actual position of the cards, e.g. due to excessive
gear friction at low temperatures or when a repeater is subjected to
heavy shocks during transport.
To initiate compass card synchronization:
1. Press and hold
DIM-
and
DIM+
simultaneously for more than 3 sec-
onds, then release the keys.
2. The compass cards start turning to align to the North (zero degree)
position. When the photo interrupters detect that both cards have
finally aligned, they briefly stop and the position offset is zeroed.
The synchronization is now complete and the repeater automatically
resumes normal operation.
2.7 Initiating the Self Test
To quickly test the proper function of the card drive and the LED indica-
tors, a self test mode is provided.
To initiate the self test:
1. Press and hold
DIM-
and
DIM+
simultaneously for more than 10 sec-
onds. As soon as the active source indicator goes off, release the
keys.
2. The repeater first executes the synchronization routine.
3. Next, all indicators and the backlight come on at maximum bright-
ness for 2 seconds, then go to minimum brightness for 2 seconds
and back to maximum brightness for another 2 seconds.
4. Lastly, the cards turn counterclockwise towards the South position,
stop briefly and then turn clockwise through a full circle until reach-
ing the South position again.
The self test is now complete and the repeater automatically resumes
normal operation.
2.8 Bearing Repeater Capacitive Keys
Although the bearing repeater type 5016-CA is equipped with capacitive
keys, in contrast to the push buttons of the compass repeaters types
5016-CB, -CC and -CD, there is no difference in functionality or handling
neither with adjusting the illumination brightness, synchronizing the
compass cards, nor with initiating the self test.