B: gas type dependence – INFICON HPG400 ATM to High-Vacuum Gauge User Manual
Page 46
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46
tina31e1 (2004-05) HPG400 v1.om
Output signal U
[V]
[mbar]
Pressure p
[Torr]
[Pa]
0 … 0.5
Sensor error
0.5 … 1.5
Underrange
1.5
2.5
3.5
4.5
5.5
6.5
7.5
1.0Ч10
-6
1.0Ч10
-5
1.0Ч10
-4
1.0Ч10
-3
1.0Ч10
-2
1.0Ч10
-1
1
7.5Ч10
-7
7.5Ч10
-6
7.5Ч10
-5
7.5Ч10
-4
7.5Ч10
-3
7.5Ч10
-2
7.5Ч10
-1
1.0Ч10
-4
1.0Ч10
-3
1.0Ч10
-2
1.0Ч10
-1
1
10
100
7.5 … 8.0
Overrange
8.0 … 8.5
Underrange
8.5
8.75
9.0
9.25
9.5
9.75
1.0Ч10
-2
1.0Ч10
-1
1
10
100
1000
7.5Ч10
-3
7.5Ч10
-2
7.5Ч10
-1
7.5
75
750
1
10
100
1000
10000
100000
9.75 … 10.2
Overrange
For gases other than air, the pressure can be determined by a simple conversion:
p
eff
= K × pressure indicated
Where
Gas type
K (mean values)
Air (N
2
, O
2
)
1.0
Xe
0.4
Kr
0.5
Ar
0.8
H
2
2.4
Ne
4.1
He
5.9
Conversion table
output signal - pressure
B:
Gas Type Dependence
Hot cathode range
(1×10
-6
mbar < p < p
Changeover
)
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