The high and low temperature and low pressure test chamber should be able to maintain the air pressure in the following figure, with a tolerance of ± 5% or ± 0.1 kPa (whichever is greater), and a tolerance of ± 2 kPa when the severity level is 84 kPa .
Air pressure
Approximate altitude / m
kPa
mbar
1
10
31200
2
20
26600
4
40
22100
8
80
17600
15
150
13600
25
250
10400
40
400
7200
55
550
4850
70
700
3000
84
840
(See note 1, note 2)
Note 1: The standard atmospheric conditions from 86 to 106kPa cover altitudes below 1000m above sea level.
Note 2: The severity level of 84kPa is applicable to the tests that require samples at the lower limit of standard atmospheric conditions.
The test duration of the high and low temperature and low pressure test chamber should be preferentially selected: 5min, 30min, 1h, 4h, 16h.
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