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Teledyne API Model 465L O3 Monitor Operation Manual
05509G DCN6806
Teledyne API Model 465L O
3
Monitor Manual
79
10.2.4.1.
Pressure Too High
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.
10.2.4.2.
Pressure Too Low
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 on the Mainboard PCA 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. 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 9.3.
Содержание 465L
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