SIRS NAVIGATION LTD
COMPONENT MAINTENANCE MANUAL
PERFORMANCE TESTING
1. General
The tests detailed in this section must be performed after overhaul or repair.
The tests must be done in an approved magnetic testing facility.
The tests must be done in an ambient temperature range of 15 to 25
°
C.
NOTE:
The magnetic tests detailed in this section are determined with a ‘magnetic
field intensity’ of horizontal force 0.18 oersted and vertical force 0.44 oersted.
Compass performance at other locations can be different and adjustment to
the specification values must be made.
2. Tools and Equipment
Items detailed in Page Block 9001 ‘SPECIAL TOOLS, FIXTURES AND EQUIPMENT’.
Item
Description
Part No. or Ref.
1
Divided Test Head
KTQ-0121
2
Sighting vane adapter
KTQ-0122
3
Tilt Stand Adapter D
KTQ-0124
4
Support Stand Adapter E
KTQ-0125
5 Corrector
Key
CE2-40
6
Standard magnetic needle
3252 LMT
11 Magnet
CE2-200
12
Insulation tester (500v d.c. 20 M
Ω
)
Commercially Available
15
Environmental Chamber of range -40
°
C to 85
°
C
Commercially Available
3. Procedure
WARNING:
DO NOT EXPOSE THE COMPASS TO A TEMPERATURE
MORE
THAN
+85°C.
A.
Silicone
Fluid
(1) Examine the compass fluid, with the eye at a distance of approximately
150mm, to see that it is transparent and free from sediment, cloudiness,
discolouration or contamination. There must be no sign of leakage.
(2) Invert the compass and examine for defects as detailed in paragraph (1).
PAGE 1005
APR 10/03
34-25-21
The document reference is online, please check the correspondence between the online documentation and the printed version.
