Particulate Systems HPVA Series, Руководство оператора, Страница: 84 / 124

Troubleshooting HPVA Series Operator’s Manual
6-2 Mar 2011
What Happened Why What to Do
Low degas adsorption Contaminated gas lines. Place gas bottles close to the
analyzer. Using gas line
extenders on gas bottles
located in remote areas may
degrade gas quality and reduce
pressure.
Instrument shuts off
unexpectedly Hydrogen sensor has been
triggered, indicating that there
is a hydrogen leak in the
instrument. May also be
triggered by other hydrocarbon
sources in the lab. Clear the hydrocarbon source,
then turn the instrument back
on.
Valves will not
operate Gas bottle depleted
For nitrogen or compressed
air, the pressure on the gas line
is less than 75 psi.
Replace the gas bottle.
Refer to Connecting a
Replacement Gas Bottle, page
6-8.
When the system is
under vacuum, a
value of 0 is not
shown in the pressure
display. The transducers may need to
be zeroed. Call you service
representative.
Inaccurate
temperature reading
shown in the one of
the temperature
displays RTD’s may need to be
recalibrated. Call you service
representative.
Pressure cycling Gas is flowing into the
manifold too fast. Adjust the metering valves.
Refer to
Adjusting the
Metering Valves, page 6-11 .