PN 903-8797, Rev A
To set the purge ow rate:
1. First, determine the steady-state ow through the Flow Restrictors in the
Filterblock.
2. Close the pressure regulator.
3. Adjust the pressure regulator for the lowest ow rate (turn counter-clock-
wise as far as possible) before reading the ow rate on the ow meter.
4. While the analyzer is in its Purge cycle (Purging/Hold Stage), adjust the
pressure regulator until the ow has increased by the desired purge ow
rate, approximately 1.0–5.0 Nl/minute (2.1–10.6 SCFH)
[Total ow = steady state + purge ow].
Normal Operation
Once the analyzer is set up and started, the measuring cycle, the automatic
scrolling of results on the User Interface, and the presentation of measurement
results on the analog output channels is continuous. Typically, the only atten-
tion required will be when it is necessary to change an operating parameter or
to clear any current Warning or Fault alarms. This can be done from the
Stat\History menu (“Clear Alarm?” prompt).
2-40 | 241CE II Hydrocarbon Dewpoint Analyzer
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