TELEDYNE API T200U NOy, Operator'S Manual

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Model T200U NOy Option Manual Addendum
07303E DCN7996 29
6.6 Checking for Leaks
If a leak checker is not available, it is possible to leak check the instrument using
the sample pump plus a shut-off valve.
1.
Turn off power to the analyzer and the 501 NOy, and unplug the external
Pump.
2. Cap the sample inlet of the external Converter, the BYPASS OUT port of the
501 NOy and the ozone generator air inlet (located inside the analyzer, Figure
6).
Figure 6. Location of O
3
Generator Air Inlet
3.
Insert a shut-off valve between the external Pump and the EXHAUST port at
the rear of the analyzer.
4. Turn on both the analyzer power and the external Pump only. Monitor the
Reaction cell pressure on the front panel. Close the shutoff valve and monitor
the cell pressure. The pressure should not increase more than 1"Hg (.5psi) in
5 minutes. If there is a leak, locate
it
by using a pressure leak checker
described below.