Gas specifications, For model d-2, For model d-2-i – VICI D-2-I User Manual
Page 15
11
System Requirements
Gas Specifications
For Model D-2
Detector Mode
PDECD
PDHID
Ar-PDPID
Kr-PDPID
Xe-PDPID
Discharge gas
Helium
Helium
2% Ar in He 1.5% Kr in He 0.8% Xe in He
Carrier gas
Helium
Helium
*
**
**
Dopant gas
3% Xe in He
n/a
n/a
n/a
n/a
Detector Mode
PDHID
Ar-PDPID
Kr-PDPID
Xe-PDPID
Discharge gas
Helium
2% Ar in He 1.5% Kr in He 0.8% Xe in He
Carrier gas
Helium
*
**
**
*
*
Any gas including He which has an ionization potential greater than 12 eV
**
Any gas including He which has an ionization potential greater than 11 eV
The helium purifier (HP2) supplied with the system must be used for the discharge gas.
Purity Specifications
•
Helium (discharge and carrier gas) must have a minimum purity of
99.999%, with < 20 ppm Ne impurity. For trace analysis of fixed gases,
we strongly recomment 99.9999% purity He with < 0.5 ppm Ne.
•
Ar-PDPID mode:
2% ± 0.3% Ar in 99.999% He balance
•
Kr-PDPID mode:
1.5% ± 0.1% Kr in 99.999% He balance
•
Xe-PDPID mode:
0.8% ± 0.2% Xe in 99.999% He balance
For Model D-2-I
*
*
Any gas including He which has an ionization potential greater than 12 eV
**
Any gas including He which has an ionization potential greater than 11 eV
Purity Specifications
•
Helium (discharge and carrier gas) must have a minimum purity of
99.999%, with < 20 ppm Ne impurity. For trace analysis of fixed gases,
we strongly recomment 99.9999% purity He with < 0.5 ppm Ne.
•
Ar-PDPID mode:
2% ± 0.2% Ar in 99.999% He balance
•
Kr-PDPID mode:
1.5% ± 0.1% Kr in 99.999% He balance
•
Xe-PDPID mode:
0.8% ± 0.2% Xe in 99.999% He balance