Table of Contents
Advertisement
Hazardous Area Operation
Troubleshooting
A-24
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
Symptom*
2. Purge timer starts but
resets, or enclosure power
not switched on at end of
purge.
3. Initial purge generally
correct, but controller
occasionally trips out
enclosure power / alarm.
Purge actual time not as set.
*Note: The description of the symptom applies to European and X-Purge systems.
In the case of Z-Purge systems, some of the points are not applicable, and the
following points should be noted.
Possible Cause
a. Purge flow depletes
supply and causes pressure
drop.
a. Intermittent air supply
fault.
b. Enclosure pressure too
close to set point.
c. Intermittent controller fault.
Timer faulty.
The enclosure power trip is replaced by a purge fail alarm.
There is no automatic initial purge. The indicators should be observed to
find out if the enclosure pressurisation has been sensed or the safe purge
detected.
Action
Check pressure at
instrument. Increase line
capacity (bigger diameter
line, shorter line length, or
different air source).
Check for other equipment
using the same air supply,
which may cause pressure
drops.
Monitor air supply
pressure. Check air supply
capacity is not marginal.
Modify air supply as
required.
Treat as possible causes
(b), (c), and (e) listed for
symptom 1.
Adjust pressure set point
only after carrying out other
checks.
Treat as possible cause (e)
for symptom 1 and possible
cause (a) for symptom 2.
Contact factory.
Thermo Fisher Scientific
Advertisement
Table of Contents
