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Model 9110T NOx Analyzer Instrument Maintenance
Teledyne Analytical Instruments 243
11.3.2. CHANGING THE O
3
DRYER PARTICULATE FILTER
The air for the O
3
generator passes through a Perma Pure
©
dryer, which is equipped with a small
particulate filter at its inlet. This filter prevents dust from entering the Perma Pure
©
dryer and degrading
the dryer’s performance over time. Change the filter according to the service interval in Table 11-1 as
follows:
1. Before starting the procedure, check and write down the average RCEL pressure
and the OZONE FLOW values.
2. Turn off the analyzer, unplug the power cord and remove the cover.
3. Unscrew the nut around the port of the filter using two 5/8” wrenches.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Ensure to use proper wrenches.
Hold the main dryer fitting with a 5/8” wrench to ensure that it does not
turn against the Perma Pure© dryer.
Performing this procedure improperly or with incorrect tools creates a
risk of causing a significant leak.
4. Take off the old filter element and replace it with a suitable equivalent (TAI P/N FL-
3).
Figure 11-2: Particle Filter on O
3
Supply Air Dryer