Installation and Start-Up | 3-41
To set the purge flow rate:
1. First, determine the steady-state flow through the Flow Restrictors in
the Filterblock.
2. Close the pressure regulator.
3. Adjust the pressure regulator for the lowest flow rate (turn counter-
clockwise as far as possible) before reading the flow rate on the flow
meter.
4. While the analyzer is in its Purge cycle (Purging/Hold Stage), adjust
the pressure regulator until the flow has increased by the desired
purge flow rate, approximately 1.0–5.0 Nl/min (2.1–10.6 SCFH)
[Total flow = steady state + purge flow].
Normal Operation
Once the analyzer is set up and started, the measuring cycle, the auto-
matic scrolling of results on the User Interface, and the presentation of
measurement results on the analog output channels is continuous. Typi-
cally, the only attention 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).
See the “Preventive Maintenance Schedule” in Chapter 6 for other regular
maintenance requirements.
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