Teledyne 465L operation manual UV Lamp Adjustment

Teledyne API Model 465L O3 Monitor Operation Manual

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.

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