Compass
STD 22
Installation and Service manual
Compass STD 22
99
Edition: Feb. 17, 2006
3646/110--233.DOC010302
3.4.3.2
Switching on the compass
The compass goes into the heating stage for the first 30 minutes (this period will vary
depending on the temperature of the supporting liquid), during which time the course
output of the compass is unavailable and the letter “h” is displayed as the leading sign
on the digital display (see Figure 59).
During the settling in stage (for 4 hours after switching on), the course output of the
compass may be used;
however, the deviation from the actual course may still be
considerable (as well as the connected course receiver)
.
During this period, an additional dot appears in the digital display of the compass
(see Figure 60).
(The “Quick Settling” option reduces the settling in stage to approximately 1 hour).
After 4 hours from switching on, the compass course may be used.
4 hours after switching on, the compass has a accuracy of <2
°
.
After appr. 5 hours (after switching on), the compass has an accuracy of
von 0,1
°
x
1
/
cos
latitude.
h = heating
= current temperature
approx. 30 minutes until a
temperature of 45
°
C has been
reached
ON THE COMPASS
The temperature for
the internal follow up
system to switch on
has been reached.
Figure 59
: Indications on the compass during the heating stage
