946 Controller Instruction Manual
pg. 42
2. Filament
Indicates the filament in use. The choices are 1 or 2.
Setup HC Gauge A1
Gas Type
Control SP
Protect Setpoint
N2
5.0E-03
B1
SAFE
1.0E-03
1.2E-03
1.0
9.0
Relay
Relay 02
Relay 01
SET
Dir/Ch
SET SP
BELOW
Hyst
Enable
1.0E-06
9.0E-07
BELOW
CLEAR
3.0E-05
3.3E-05
Relay 04
Relay 03
BELOW
ENABLE
2.0E-08
1.8E-09
BELOW
CLEAR
5.0E-07
5.5E-07
Filament
1
30
EC
20 uA
DG Time
Sensitivity
Figure 6-11 Hot Cathode Setup Information Screen
Gas
Symbol
Relative correction factor to N
2
Air
1.00
Argon
Ar
1.29
Carbon Dioxide
CO
2
1.42
Deuterium
D
2
0.35
Helium
He
0.18
Hydrogen
H
2
0.46
Krypton
Kr
1.94
Neon
Ne
0.30
Nitrogen
N
2
1.00
Nitrogen Oxide
NO
1.16
Oxygen
O
2
1.01
Sulfur Hexafluoride
SF
6
2.50
Water
H
2
O
1.12
Xenon
Xe
2.87
Table 6-2 Relative Sensitivities (to N
2
) for Different Gases
3. DG Time
Length of time for a degas cycle of a hot cathode sensor. The value can be set from 5 to 240
minutes in 1 minute increments. The default value is 30 min.