Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM-08837A-34/2
Table 4-14.1 IMU Testing, Alignment, and Troubleshooting Using Tape Reader, Part No. 877406-2 --
Continued
Malfunction
Test procedure
Normal indication
indication/corrective action
At the end of a subtest, data may be printed out. The message AT LEAST ONE OUT-OF-CAL IN TEST
NUMBER X means an out-of-tolerance parameter was recalibrated. It is not a failure message and no operator
act ion is required.
2k. If the theodolite is to be used, set
2l.
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 theo-
dolite. If theodolite is not used, go
to step 2s at completion of test
(approximately 8 hours)
Move primary pallet to O de-
grees pitch and O degrees roll
2m. Remove porro prism cover and
level porro prism. Verify theod-
olite can autoreflect on porro
prism
Type RDY
20.
2p.
Measure horizontal angle from
the target to the porro prism.
(Refer to chapter 5)
Enter horizontal angle in format
XXXX.XX RDY
In approximately 45 minutes, TTY
prints:
THEODOLITE TEST (TO ABORT
AT ANY TIME TYPE: BYP)
MOVE IMU TO O DECREES
PITCH O DECREES ROLL
WHEN DONE TYPE: RDY
ALIGNMENT HALTED
Autoreflection achieved
TTY prints out:
RDY
ENTER THEODOLITE READING
(MILS) RDY
ALIGNMENT HALTED
TTY prints out:
RDY
XXX.XXXX DEGREES PITCH 10-
SEC AV
XXX.XXXX DECREES ROLL 10-
SEC AV
XXX.XXXX DECREES AZ 10-SEC
AV
Theodolite does not autoreflect: Ad-
just primary pallet orientation un-
til autoreflection is achieved
TTY prints out:
RDY
X.XX DECREES PITCH
X.XX DECREES ROLL
ATTITUDE NOT WITHIN 2 DE-
GREES OF REQUESTED
MOVE IMU TO X DECREES
PITCH X DECREES ROLL
WHEN DONE
TYPE: RDY
ALIGNMENT HALTED
Repeat steps 2l and 2m adjusting
pitch and roll as necessary
4-90.8
Change 5