Filter
Top Products
Teledyne API Model 465L O
3
Monitor Operation Manual
05509F DCN6409 69
9.4. UV Lamp Adjustment
CAUTION
GENERAL SAFETY HAZARD
Do not look at the UV lamp while the unit is operating. UV light can
cause eye damage. Always use safety glasses made from UV blocking
material. (Generic plastic glasses are not adequate).
WARNING - RISK OF ELECTRICAL SHOCK
HIGH VOLTAGE MAY BE PRESENT WHEN POWER IS CONNECTED TO
THE INSTRUMENT!
1. Instrument should be running and warmed up for at least 20 minutes.
2. With instrument running, remove the six screws and the top cover.
3. Navigate the front panel menu to VIEW menu and scroll to REF display and press ENT.
At this point there should be a scrolling display similar to “REF = XXXX MV.” See
Section 7.2 for details on menu navigation.
4. Locate the UV Detector adjustment pot on the forward end of the sensor module (see
Figure 9-1 or Figure 9-2 above.)
5. While observing the REF value on the display, slowly turn the pot to adjust the value.
The target adjustment range is as high as possible within the range of 800 – 1150 mV.
6. If the required adjustment cannot be achieved by adjusting the UV Detector pot alone,
then additional adjustment can be made by loosening the two UV lamp setscrews on the
UV lamp housing (see Figure 9-1 or Figure 9-2) and rotating the lamp. Rotate the lamp
very slowly while observing the REF value on the display. Make sure the lamp does not
pull out and remains seated in the housing while it is being rotated. Re-tighten the two
setscrews when a desired point has been reached.
7. If necessary, additional “fine tuning” can now be done with the UV Detector adjustment
pot per step 5.
8. Re-Install instrument cover and observe REF value on display for a couple minutes to
verify it does not drift out of the adjustment range.