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TELEDYNE INSTRUMENTS
Maintenance 460L Instruction Manual
46 05228 Rev B
PRINTED DOCUMENTS ARE UNCONTROLLED DCN 5164
9.1.2. Mounting the Particulate Filter Externally
In applications where the 460L is sampling ambient air at its own location and no inlet gas line is
being used, the particulate filter can be mounted on the outside of the instrument so that it may
be replaced without turning off the monitor or opening the case.
To mount the particulate filter outside the monitor enclosure:
1. Turn the monitor off and ensure that the gas delivery line is not under pressure
2. Purge the gas delivery line of ozone.
3. Unscrew the pressure attached to the internal gas line (Fitting A in Figure 9-2) from the
union fitting.
4. Unscrew the union fitting from the fitting at the top of the filter (fitting B in Figure 9-2).
Although the union fitting is no longer needed, save it in case you wish to return the
particulate filter to the inside of the monitor at a later date.
5. Unscrew the pressure fitting at the bottom of the filter (Fitting C in Figure 9-2) from the
ozone inlet.
6. Reattach the filter to the external side of the ozone inlet.
7. Attach the internal gas line to the internal side of the ozone inlet using Fitting A.
8. After reassembly, the gas line should be pressurized with oxygen or dry air and checked
for leaks using a bubble solution.
Pressure
Fitting A
Filter
Ozone Inlet
Pressure
Fitting B
Pressure
Fitting C
AFTER
Ozone Inlet
Filter
BEFORE
Pressure
Fitting A
Union
Fitting
Pressure
Fitting C
Pressure
Fitting B
Inlet Gas Line
No Inlet Gas Line
Figure 9-2 Changing the Particulate Filter