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Teledyne API Model 480L O
3
Monitor User Manual
09419A DCN8342
8.2.4.1
P
RESSURE
T
OO
H
IGH
The monitor inlet is being pressurized. The monitor inlet should be allowed to
sample gas at ambient pressure. Disconnect all sample lines from the monitor and
read the pressure again. If the value then drops to within the acceptable range, then
one of the sample lines is at elevated pressure.
If the inlet is being pressurized, then the design of the sample system should be
reviewed and corrected. Contact Teledyne API Technical Support for assistance.
8.2.4.2
P
RESSURE
T
OO
L
OW
Something may be restricting the flow through the monitor, causing the sample
pump to pull a vacuum on the sensor module.
First, unplug the sample pump power plug, J9 on the Mainboard PCA (refer to
Figure 7-1 for pump location and Figure 7-2 for connector location) and observe the
pressure reading. If the pressure reading is still too low, then likely there is a
problem with the pressure sensor on the Sensor Module and the Sensor Module
should be replaced.
Next reconnect the pump and disconnect all sample lines from the monitor and see
if the pressure increases to normal levels.
•
If it does, then the problem is somewhere in the sampling system external to
the monitor.
•
If the pressure is still below the limit with the sample lines removed, then
there is a restriction in the pneumatics of the monitor upstream of the sensor
assembly. The most likely cause is a plugged particulate filter.
o
Disconnect the outlet fitting on the sample filter and observe the
pressure. If it returns to normal levels, then the restriction is in the
particulate filter or inlet manifold assembly (multi-stream
configurations only). Replace particulate filter per Section 7.3.
8.3 TECHNICAL ASSISTANCE
If an issue persists, please call our Technical Support Department:
Teledyne API Technical Support
9970 Carroll Canyon Road
San Diego, California 92131-1106 USA
Phone (toll free): +1 800-324-5190
Phone: +1 858-657-9800
Fax: +1 858-657-9816
Email: [email protected]
Website:
Summary of Contents for 480L
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