Date: November 2016
Issue No: 2
Crewsaver -
Servicing Manual : Inshore 380N Lifejacket
Page
of 31
21
6.1.1. Air Holding Test. (Both chambers must be tested independently)
6.1.1.1 Connect through a suitable Tee piece and adaptor, the oral tube with the oral valve in the open
position, to a graduated water manometer (or a similar digital device for measuring back
pressure).
6.1.1.2 Slowly inflate the lifejacket from a regulated supply until manometer reads 200mbar
Warning: Regulated supply pressure must not exceed 20psi.
6.1.1.3 Close off the air supply and leave for 10 minutes to ensure pressure is stable.
6.1.1.4 Check and record the pressure and temperature reading on the Service Record Sheet.
6.1.1.5 Leave for 30 minutes.
6.1.1.6 Check and record the pressure and temperature reading on the Service Record Sheet.
The maximum difference in the two pressure readings (pressure drop) allowed is 10%. The
temperature differential shall be within plus or minus 3 degrees of the original reading. For each
degree Centigrade rise in temperature subtract 2.5 mbar. For each degree Centigrade drop in
temperature add 2.5 mbar to the readings to obtain the actual pressure variation. Should the
temperature variation be outside 3 degrees either way then the test shall be repeated.
6.1.1.7.
If Lifejacket fails the Air holding test inspect as follows.
6.1.1.7.1 With the lifejacket inflated carefully brush or spray the surface with a weak solution of soap and
water or alternatively lower the lifejacket into a tank of water to observe for bubbles.
6.1.1.7.2 Identify and mark the source of leakage. Wash off in clean water and allow to dry naturally in air.
6.1.1.7.2.1 Special Attention to be given to:
a) Manifold Schrader Core
b) Oral Tube/ Top-up Valve
6.1
Inflation Chamber
6
Section
PSI
in/H
2
O
in/Hg
mm/H
2
O
mm/Hg
kg/cm
2
bar
mbar
Pa
kPa
1.0
27.71
2.036
703.1
51.75
0.0703
0.0689
68.95
6895
6.895
1.1
30.48
2.240
773.4
56.93
0.0773
0.0758
75.85
7585
7.585
1.2
33.25
2.443
843.7
62.10
0.0844
0.0827
82.74
8274
8.274
1.3
36.02
2.647
914.0
67.28
0.0914
0.0896
89.64
8964
8.964
1.4
38.79
2.850
984.3
72.45
0.0984
0.0965
96.53
9653
9.653
1.5
41.57
3.054
1054.7
77.63
0.1055
0.1034
103.43
10343
10.34
1.6
44.34
3.258
1125.0
82.80
0.1125
0.1102
110.32
11032
11.03
1.7
47.11
3.461
1195.3
87.98
0.1195
0.1171
117.22
11722
11.72
1.8
49.88
3.665
1265.6
93.15
0.1265
0.1240
124.11
12411
12.41
1.9
52.65
3.868
1335.9
98.33
0.1336
0.1309
131.01
13101
13.10
2.0
55.42
4.072
1406.2
103.50
0.1406
0.1378
137.90
13790
13.79
2.1
58.19
4.276
1476.5
108.68
0.1476
0.1447
144.80
14480
14.48
2.2
60.96
4.479
1546.8
113.85
0.1547
0.1516
151.69
15169
15.17
2.3
63.73
4.683
1617.1
119.03
0.1617
0.1585
158.59
15859
15.86
2.4
66.50
4.886
1687.4
124.20
0.1687
0.1654
165.48
16548
16.55
2.5
69.28
5.090
1757.8
129.38
0.1758
0.1723
172.38
17238
17.24
2.6
72.05
5.294
1828.1
134.55
0.1828
0.1791
179.27
17927
17.93
2.7
74.82
5.497
1898.4
139.73
0.1898
0.1860
186.17
18617
18.62
2.8
77.59
5.701
1968.7
144.90
0.1968
0.1929
193.06
19306
19.31
2.9
80.36
5.904
2039.0
150.08
0.2039
0.1998
199.96
19996
20.00
3.0
83.13
6.108
2109.3
155.25
0.2109
0.2067
206.85
20685
20.69
3.1
85.90
6.312
2179.6
160.43
0.2179
0.2136
213.75
21375
21.37
3.2
88.67
6.515
2249.9
165.60
0.2250
0.2205
220.64
22064
22.06
3.3
91.44
6.719
2320.2
170.78
0.2320
0.2274
227.54
22754
22.75
3.4
94.21
6.922
2390.5
175.95
0.2390
0.2343
234.43
23443
23.44
3.5
96.99
7.126
2460.9
181.13
0.2461
0.2412
241.33
24133
24.13
3.6
99.76
7.330
2531.2
186.30
0.2531
0.2480
248.22
24822
24.82
3.7
102.53
7.533
2601.5
191.48
0.2601
0.2549
255.12
25512
25.51
3.8
105.30
7.737
2671.8
196.65
0.2671
0.2618
262.01
26201
26.20
3.9
108.07
7.940
2742.1
201.83
0.2742
0.2687
268.91
26891
26.89
4.0
110.84
8.144
2812.4
207.00
0.2812
0.2756
275.80
27580
27.58
4.1
113.61
8.348
2882.7
212.18
0.2882
0.2825
282.70
28270
28.27
4.2
116.38
8.551
2953.0
217.35
0.2953
0.2894
289.59
28959
28.96
4.3
119.15
8.755
3023.3
222.53
0.3023
0.2963
296.49
29649
29.65
4.4
121.92
8.958
3093.6
227.70
0.3093
0.3032
303.38
30338
30.34
4.5
124.70
9.162
3164.0
232.88
0.3164
0.3101
310.28
31028
31.03
4.6
127.47
9.366
3234.3
238.05
0.3234
0.3169
317.17
31717
31.72
4.7
130.24
9.569
3304.6
243.23
0.3304
0.3238
324.07
32407
32.41
4.8
133.01
9.773
3374.9
248.40
0.3374
0.3307
330.96
33096
33.10
4.9
135.78
9.976
3445.2
253.58
0.3445
0.3376
337.86
33786
33.79
5.0
138.55
10.180
3515.5
258.75
0.3515
0.3445
344.75
34475
34.48
5.1
141.32
10.384
3585.8
263.93
0.3585
0.3514
351.65
35165
35.16
5.2
144.09
10.587
3656.1
269.10
0.3656
0.3583
358.54
35854
35.85
5.3
146.86
10.791
3726.4
274.28
0.3726
0.3652
365.44
36544
36.54
5.4
149.63
10.994
3796.7
279.45
0.3796
0.3721
372.33
37233
37.23
5.5
152.41
11.198
3867.1
284.63
0.3867
0.3790
379.23
37923
37.92
5.6
155.18
11.402
3937.4
289.80
0.3937
0.3858
386.12
38612
38.61
5.7
157.95
11.605
4007.7
294.98
0.4007
0.3927
393.02
39302
39.30
5.8
160.72
11.809
4078.0
300.15
0.4077
0.3996
399.91
39991
39.99
5.9
163.49
12.012
4148.3
305.33
0.4148
0.4065
406.81
40681
40.68
6.0
166.26
12.216
4218.6
310.50
0.4218
0.4134
413.70
41370
41.37
