Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-14. IMU Testing, Alignment, and Troubleshooting – Continued
Malfunction
Test procedure Normal indication
indication/corrective action
2k. If the theodolite is to be used,
set it up to autoreflect on the
porro prism and measure the
horizontal angle from the target
to the porro prism as shown in
figure 4-9. Refer to chapter 5 for
operation of theodolite. If the-
odolite is not used, go to step 2s
at completion of test (approxi-
mately 8 hours)
2l. Move primary pallet to 0 de-
grees pitch and 0 degrees roll
2m. Remove porro prism cover and
2n.
level porro prism. Verify theod-
olite can autoreflect on porro
prism
Type RDY
In approximately 45 minutes, TTY
prints:
THEODOLITE TEST
(TO ABORT AT ANY TIME TYPE:
MOVE IMU TO 0 DEGREES
PITCH 0 DECREES ROLL
WHEN DONE TYPE: RDY
ALIGNMENT HALTED
Autoreflection achieved
TTY prints out:
RDY
ENTER THEODOLITE READ-
ING: (MILS) RDY
ALIGNMENT HALTED
2o. Measure horizontal angle from
the target to the porro prism.
(Refer to chapter 5)
2p. Enter horizontal angle in format TTY prints:
XXXX.XX RDY
RDY
XXX.XXXX DECREES PITCH 10-
SEC AV
XXX.XXXX DECREES ROLL 10-
SEC AV
XXX.XXXX DECREES AZ 10-SEC
AV
MOVE IMU TO X DEGREES
PITCH X DECREES ROLL
Theodolite does not autoreflect: Ad-
just primary pallet orientation un-
til autoreflection achieved
TTY prints out:
RDY
X.XX DEGREES PITCH
X.XX DEGREES ROLL
ATTITUDE: NOT WITHIN 2 DE-
CREES OF REQUESTED
MOVE IMU TO X DEGREES
PITCH X DECREES ROLL
WHEN DONE TYPE: RDY
ALIGNMENT HALTED
Repeat steps 2l and 2m adjusting
pitch and roll as necessary
WHEN DONE TYPE: RDY
4-88
Change 5