Patent ID: 11953484
Assignee: PFEIFFER VACUUM
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A setting method for setting conductances of controllable restrictions of an airborne molecular contamination measurement station, the measurement station includes at least one gas analyser, and at least two sampling lines which are connected to a common line which is connected to an inlet of the at least one gas analyser, each sampling line comprising a controllable restriction having a conductance that can be set between a minimum value and a maximum value, the setting method comprising:
an initial identification step, prior to carrying-out of an airborne molecular contamination measurement step, and during which a sampling line that has a lowest conductance when the conductance of the controllable restriction of the at least two sampling lines is set to its maximum value, is determined; and
an initial conductance-setting step prior to carrying-out of the measurement step and after the initial identification step, and during which the conductances of the controllable restrictions are set to make them correspond to the lowest conductance determined in the initial identification step.