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T400 Ozone Analyzer Operator’s Manual Troubleshooting & Service
269
12.9. TROUBLE SHOOTING THE IZS OPTIONS O
3
GENERATOR
The only significant components of the O
3
generator that might reasonably malfunction
is the power supply assembly for the UV source lamp and the lamp itself.
12.9.1. CHECKING THE O
3
GENERATOR UV LAMP POWER SUPPLY
The lamp power supply for the IZS options O
3
generator is the same assembly used for
the photometer’s lamp power supply. The method for checking it out is identical to that
listed in Section 12.8.2 above.
12.10. SERVICE PROCEDURES
12.10.1. REPAIRING SAMPLE FLOW CONTROL ASSEMBLY
The Critical Flow Orifice is part of the Flow Control Assembly located on the sample
pump assembly or optionally in the ozone generator for instruments with the IZS option.
The jewel orifice is protected by a sintered filter, so it is unusual for the orifice to need
replacing, but it is possible for the sintered filter and o-rings to need replacing. See the
Spare Parts list in Appendix B for part numbers and kits.
Procedure:
1. Turn off Power to the analyzer.
2. Locate the flow control assembly attached to the sample pump. See Figure 3-5.
3.
Disco
nnect the pneumatic fittings.
4. Remove the assembly from the sample pump by disconnecting the ¼” tube fitting
on the pump inlet elbow.
5. The inlet end of the assembly is the straight ¼” tube to 1/8” male NPT fitting.
Remove the fitting and the components as shown in the exploded view in the
following figure.
6. Replace the O-rings and the sintered filter.
7. If you are replacing the Critical Flow Orifice itself, make sure that the side with the
red colored sapphire jewel is facing downstream to the flow gas flow.
8. Re-assemble in reverse order. See the Spares List in Appendix B for part numbers.
9. After re-connecting the power and pneumatic lines, verify flow rate is between 720
and 880 cc/min.
06870C DCN6332