Uv Lamp Adjustment And/Or Replacement; Adjusting The Uv Lamp (Peaking The Lamp) - Teledyne T102 Operation Manual

Teledyne API - T102/501 TRS, Addendum to T101 Operation Manual

11.5.1. UV Lamp Adjustment and/or Replacement

11.5.1.1. Adjusting the UV Lamp
DO NOT grasp the UV lamp by its cap when changing its position (see Figure 11-1).
07267B DCN6485
There are three ways in which ambient conditions can affect the UV Lamp output and
therefore the accuracy of the TRS concentration measurement: lamp power supply failing,
lamp aging, and lamp positioning.
Lamp Power Supply Failing
If the UV lamp power supply begins to fail, it can cause the UV lamp value to decrease
in its output. Ensure the Lamp driver board has a Yellow Dot on the board. If it
doesn't, contact TAPI Technical Support for a replacement board.
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 the Lamp Calibration section
in the T101 Manual - PN 07266) will compensate for this until the lamp output becomes
too low to function at all, 2-3 years nominally.
Lamp Positioning
The UV output level of the lamp is not even across the entire length of the lamp. Some
portions of the lamp shine slightly more brightly than others. At the factory the position
of the UV lamp is adjusted to optimize the amount of UV light shining through the UV
filter/lens and into the reaction cell. Changes to the physical alignment of the lamp can
affect the analyzer's ability to accurately measure SO
ALWAYS wear UV-Protective, Safety Glasses when working with the
1. Set the analyzer display to show the signal I/O function,
UVLAMP_SIGNAL (see the Using the Diagnostic Signal I/O Function
section in the T101 Manual - PN 07266). UVLAMP_SIGNAL is function
35.
2. Slightly loosen the large brass thumbscrew located on the shutter
housing (see Figure 11-1) so that the lamp can be moved.
3. While watching the UVLAMP_SIGNAL reading, slowly rotate the lamp
or move it back and forth vertically until the UVLAMP_SIGNAL reading
is at its maximum.
Always grasp the main body of the lamp.
Ideally, the reading should be 3500mV±200mV.
• If UVLAMP_SIGNAL is lower than 600mV, replace the lamp.
• If UVLAMP_SIGNAL is greater than 3800 mV, adjust the pot on the
UV reference board down until the output reads 3500 mV, and then
continue to peak the lamp.
Peaking the Lamp
(
CAUTION:
UV Lamp Assembly
NOTE:
TROUBLESHOOTING and REPAIR
.
2
)
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