PICARRO G2302 User Manual page 43

Note: Do not simply restart Windows, since this does not cycle the
power to the analyzer.
3. Sample pressure cannot be controlled to the appropriate value
for concentration measurements
Context:
automatically locked to the correct value by means of electronically
controlled inlet and outlet valves. The message "Pressure Locked"
on the front panel display and the user interface indicates that the
cavity pressure is at the appropriate value. Should either of the
messages "Pressure high" or "Pressure low" be displayed, the
cavity pressure is out of its correct operating range.
(a) The "Pressure low" message indicates that there is
(b) The "Pressure high" message indicates that gas cannot be
4. User interface program "freezes" and does not update graphs
as data are collected
Context: The computer may become unresponsive causing the
programs that control the analyzer to stop functioning. The
computer and analyzer should be shut down and restarted.
(a) Re-setting the computer and the instrument requires that
Picarro G2302 Analyzer User's Guide
Rev. B 1/14/11
Under normal
insufficient gas available at the inlet of the analyzer. Check
the inlet plumbing to the analyzer and ensure that the
pressure at the inlet is within the specifications.
removed from the analyzer at a sufficient rate. Check the
vacuum line between the analyzer and the power vacuum
unit for leaks. Failure of the vacuum pump, injecting
dilution gas at excessive pressure, or excessive pressure
at the inlet can also cause this problem.
the computer be shut down and restarted. If the computer
responds to the mouse, a normal Windows shutdown may
be carried out: use the Start menu, select the red Shut
down button and select "Shut down" in the drop-down box
under "What do you want the computer to do?" Wait for the
shutdown to complete normally and for the computer and
analyzer to turn off completely. After a few seconds, restart
the computer by momentarily depressing the power button.
operation, the cavity pressure is
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