Compass
STD 22
Installation and Service manual
Compass STD 22
101
Edition: July 1, 2005
3646/110--233.DOC010302
3.4.3.3
Setting the compass zero (reference course)
Once the compass has been installed, it must be aligned according to its installation
location. The compass zero is set using DIP switch B 37 and buttons B 38 and B 39.
The compass must have been in operation for at least 5 hours before the compass
zero is set.
Button B39
Button B38
DIP switch B37
Display
Button B39
Button B38
B37 DIP switch
Display
E10
Figure 61: DIP switch B37 and buttons B38/B39
The reference course to be set is determined from the ship’s fore-and-aft line
(e.g. take a bearing or obtain the pier course from the sea chart).
This reference course is entered according to the following procedure.
--
Set DIP switch B37 “1” to the “OFF” position.
The digital indicator is now indicating “ALEr” = Alignment Error
--
Press button B38 or button B39 until the heading you require is displayed
(B38 changes the value downwards and B39 changes it upwards).
--
If you hold down the button the speed at which it changes will increase.
Set DIP switch B37 “1” to the “ON” position. This saves the set value in the
compass.
--
After the reference course has been set, read the alignment error
(see next section) (See also Figure 62)
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