al-CRYOGENICS
HELIX TECHNOLOGY CORPORATION
•
Appendix D
Conversion of Hydrogen-Vapor-Pressure
Gauge Readings to Temperature
Use the data given below to convert a reading of the
The hydrogen-vapor-pressure gauge should not be
hydrogen-vapor-pressure gauge (in psia) to the tempera-
used to measure temperatures higher than 26K.
ture of the second-stage cold station (in degrees Kelvin).
TEMPERATURE VS. HYDROGEN-VAPOR
PRESSURE
26
24
22
20
K
18
16
14
12
—
10
1
I
1
1
1
1
1
i
1 1
1 1
1
1 1
0
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
PSIA
PSIA
K
PSIA
K
0
Less than 12
15
20.5
1
13.9
18
21.1
2
15.2
21
21.7
3
16.0
24
22.2
4
16.7
27
22.6
5
17.2
30
23.1
6
17.7
35
23.7
7
18..1
40
24.3
8
18.5
45
24.8
10
19.2
50
25.3
12
19.7
55
25.8
•
P/N 8040272
D-1
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