Compass
STD 22
Installation and Service manual
Compass STD 22
Compass STD 22 Compact
193
Edition: May 20, 2005
3646/110--233.DOC010302
7.2.4
Warning 4 “Supporting liquid level too low”
This warning is output when the level of the supporting liquid in the outer sphere is too
low. The supporting liquid is determined by an immersion probe installed in the upper
part of the outer sphere.
You must check the supporting liquid immediately and if necessary top up with distilled
water -- only distilled water -- (one 240cm
2
bottle) in to the ventilation outlet until the
measuring cone shows the desired level, the remaining content of the bottle has to be
filled into the inlet for distilled water, see service manual).
This measure does not compensate the planned replacement of the supporting liquid!!!
In certain circumstances (if the level of the supporting liquid falls suddenly) you must
establish the cause (possibly a leak) and correct the fault.
If the level of supporting liquid is too low, the gyro--current is interrupted and an Error is
displayed,the heading information will not longer displayed ( as well as the heading
information to the connected heading receivers).
Please note: At the Operator Unit for Gyro compass STD 20 this warning is shown as
C4 “Temperature”
.
7.2.5
Warning 5 “Voltage cut-off”
This warning is output if the supply voltage is cut off for a short time. The cut-off period is
determined by the fall in supporting liquid temperature. If the temperature falls below
45
°
C the compass recognises that the voltage supply has been switched off in the
conventional way.
In the case of a voltage cut-off (supporting liquid temperature does not fall to below
45
°
C) and the voltage supply has been restored, the settling stage in indicated again
(see also section 3.4.3.2 “Compass indications during the settling stage”).
Note:
Heading indication can be incorrect. Wait for a complete follow up,
Check voltage supply to the gyro compass!
