Figure D–5: 6-mm stud
5.
Connect the free end of the long piece of 6-mm PTFE tubing to the 6-mm stud.
Requirement:
The nitrogen must be dry and oil-free, with a purity of at least 95%.
Regulate the supply at 600 to 690 kPa (6.0 to 6.9 bar, 87 to 100 psi).
D.5 Connecting and disconnecting the external source
exhaust valve assembly (KAB)
Replace the source exhaust valve annually, or when a source pressure test fails and all other
causes of failure have been investigated.
The following procedures apply to instruments fitted with the external source exhaust valve
assembly (serial number suffix “KAB”). If the model of your QDa supports the internal source
exhaust valve assembly (serial number suffix "KAD"), see the procedures in
disconnecting the internal source exhaust valve assembly (KAD)
Note:
Identifying your instrument version
for guidance on identifying the version of your
QDa to determine the appropriate procedures to follow for configuring the valve connections on
your instrument.
D.5.1 Connecting the external source exhaust valve assembly (KAB)
Before powering-on the QDa detector, you must connect the assembly.
Required materials
• Chemical-resistant, powder-free gloves
To connect the source exhaust valve assembly:
Requirement:
Wear clean, chemical-resistant, powder-free gloves when performing
this procedure.
June 15, 2017, 715003956 Rev. F
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