INSTALLATION MANUAL
20221594 / Cb
7
2.6
Calibration
of 1:1 synchro interface
Compasses using geared synchro do not need any calibration.
For compasses with1:1 synchro, GI51 is factory calibrated for:
-
26V 400Hz ref. voltage, 11.8V L/L type synchro signal
(used by S.G. Brown model A,B,M,S, Meridian, SGB-100,
Robertson SKR82)
-
90V 400Hz ref. voltage 70V L/L used by Simrad RGC50
and RGC10
The factory calibration is selected by dip switch SW2-2 (refer
section 2.3).
If components of the GI51 synchro interface or the flash memory
are replaced by repair, calibration is necessary. This requires a
full turn of the synchro shaft. For a compass that can be slewed,
or a ship in water where it can make a full turn, calibration may
be done on-site. Otherwise it has to be done in a workshop.
Calibration requires a 360° turn of the compass synchro within
30 minutes and can be started as follows:
-
If connected to a Simrad autopilot via Robnet, calibration is
started from the autopilot Seatrial menu
-
If you have access to a computer with appropriate NMEA
interface, calibration may be performed with proprietary
sentences as listed in page 19
-
By flipping the dip switch SW1-4 ON/OFF
During calibration, the green CPU Running LED will flash at
appr. 4 Hz which is 4 times the normal rate.
Summary of Contents for GI51
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