Filter
Top Products
M102E/M501 TRS TROUBLESHOOTING & REPAIR
(Addendum to M101E Manual - P/N 04740 Rev A)
10. If TRS Æ SO
2
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 SO
2
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’ SO
2
scrubber can get into the
converter tube and react with the TRS Æ SO
2
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.
05514 Rev A1 55