Teledyne Additional Repair Procedures, UV Lamp Adjustment and/or Replacement, M102E/M501 TRS

M102E/M501 TRS TROUBLESHOOTING & REPAIR

(Addendum to M101E Manual - P/N 04740 Rev A)

10.If TRS Æ SO2 converter efficiency is below 90% check for one of the following possible causes:

•Pneumatic leak

•Perform a leak check (with the M501-TRS connected) as described in Section 11.5.1 of the M101E Manual - P/N 04740 Rev A.

•Plugged or constricted pneumatic flow?

•Perform a sample flow check as described in Section 11.5.2 of the M101E Manual - P/N 04740 Rev A. This tests the entire system

•Disconnect the gas feed line from the FROM ANALYZER port of the M501-TRS. Attach the flow meter to the port and repeat the test. Isolates the portions of the

pneumatic system down stream from the TRS Æ SO2 switching valve but includes the M501-TRS in the flow test.

•Attach the flow meter to the FROM CONVERTER port at the back of the M102E. Retest. This bypasses M501-TRS during the flow test.

•Improper Set point temperature. Call Teledyne API’s customer service for advice.

•Span Gas used in efficiency test was incorrect/wrong concentration. Independently verify the concentration of the span gas.

•Contaminants in the converter chamber, pneumatic lines. Sometimes contaminants such

as tiny particles of scrubber material from the M501-TRS’ SO2 scrubber can get into the converter tube and react with the TRS Æ SO2 conversion process, if the inline filter after the scrubber was damaged..

Call Teledyne Instruments customer service for instructions on cleaning the converter tube and M501-TRS pneumatic lines.

10.5. Additional Repair Procedures

The following repair procedures are in addition to those listed in Section 11.6 of the M101E Manual - P/N 04740 Rev A,

10.5.1. UV Lamp Adjustment and/or Replacement

There are three ways in which ambient conditions can affect the UV Lamp output and therefore the accuracy of the TRS concentration measurement. These are:

Line Voltage Change: UV lamp energy is directly proportional to the line voltage. This can be avoided by installing adequate AC Line conditioning equipment such as a UPS/surge suppressor.

Lamp Aging - Over a period of months, the UV energy will show a downward trend, usually 30%

-50% in the first 90 days, and then a slower rate, until the end of useful life of the lamp. Periodically running the UV lamp calibration routine (see Section 6.9.7 of the M101E Manual - P/N 04740 Rev A) will compensate for this until the lamp output becomes too low to function at all, 2- 3 years nominally.

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