TM 55-6610-247-40
SECTION III
FINAL TEST PROCEDURES
3-3. Test Requirements.
3-1. General.
Testing will be performed with vibrator on and in a
Final test procedures for the sensitive altimeter
normal operating position and a MILB 4308, type Ai
include a visual examination, coordination test, zero
barometer will be used.
setting test, scale error test, hysteresis and after effect
test, friction test, low temperature scale error test, case
3-4. Deleted.
leak test, and position error test. Unless otherwise
specified, the sensitive altimeter shall be tested at
3-5. Zero Setting Test.
standard sea level atmospheric pressure of 29.92 Hg and
Perform zero setting test as detailed in paragraph 5-
a room temperature of 25C (77F).
2d(1).
3-2. Visual Examination.
NOTE
Inspect each instrument for the following:
Rotate adjustment knob for one
a. Appearance of case including chips or cracks.
complete revolution of mechanism to
b. Burred or loose screws.
test gear mesh for smooth operation.
c. Appearance of dial and pointers.
There shall be no binding or rough
d. Clearance of hands.
movement of gears. If adjustment knob
e. Appearance of glass for cleanliness and freedom
turns too tightly or grinds, it is an
from chips or cracks.
indication of improper mesh between
pinion gear in case and mechanism
body.
Table 3-1. Altitude Pressure Table, Feet VS Inches of Mercury
PRESSURE INCHES
0.00
0.01
0.02
0.03 0.04
0.05
0.06
0.07
0.08
0.09
28.0 ..............
1824 1814 1805 1795 1785 1776 1766 1756
1746
1737
28.1 ..............
1727 1717 1707 1698 1688 1678 1668 1659
1649
1639
28.2 ..............
1630 1620 1610 1601 1591 1581 1572 1562
1552
1542
28.3 ..............
1533 1523 1513 1504 1494 1484 1475 1465
1456
1446
28.4 ..............
1436 1427 1417 1407 1398 1388 1378 1369
1359
1350
28.5 ..............
1340 1330 1321 1311 1302 1292 1282 1273
1263
1254
28.6 ..............
1244 1234 1225 1215 1206 1196 1186 1177
1167
1158
28.7 ..............
1148 1139 1129 1120 1110 1100 1091 1081
1072
1062
28.8 ..............
1053 1043 1034 1024 1015 1005
995
986
976
967
28.9 ..............
957
948
938
929
919
910
900
891
881
872
29.0 ..............
863
853
844
834
825
815
806
796
787
777
29.1 ..............
768
758
749
739
730
721
711
702
692
683
29.2 ..............
673
664
655
645
636
626
617
607
598
589
29.3 ..............
579
570
560
551
542
532
523
514
504
495
29.4 ..............
485
476
467
457
448
439
429
420
410
401
29.5 ..............
392
382
373
364
354
345
336
326
318
308
29.6 ..............
298
289
280
270
261
252
242
233
224
215
29.7 ..............
205
196
187
177
168
159
149
140
131
122
29.8 ..............
112
103
94
85
75
66
57
47
38
29
Change 5 3-1
