Agilent Technologies PHD-4 User Manual page 69

Sampling auto adjust
The Sampling autoadjust function offsets the progressive loss of
performance of the sampling line.
Execution of the function is requested by the user interface every 20
h of operation but can also be started “manually” at any time
( “Sampling auto adjust” command).
It is also possible not to start the procedure when requested (SKIP
key) by the HID but this procedure is initiated subsequently at each
start-up until it is executed.
The “Sampling auto adjust” procedure makes an indirect measurement of the
NOTE
flow sampled; therefore, in some cases, it may take several minutes.
PHD-4 Portable Helium Detector User Manual
Technical Information
/ 87-900-120-01 (F )
5
User Interface
117/140