Markes International Unity 2 - Sequence of Operation Steps

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2.2 Sequence of operation
When a tube is placed and sealed into the flow path of UNITY 2 for conventional 2(3) stage desorption, it
undergoes the following sequence of operations: standby, leak test, prepurge, primary desorption, pre trap
fire purge and secondary desorption.
2.2.1 Standby
Sample Tube
Split Tube
Cold Trap
GC
Heated Valve
STANDBY
Pressure and flow
Pressure (flow optional)
Pressure, no flow
KEY