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T400 Ozone Analyzer Operator’s Manual Instrument Maintenance
239
Once a lamp position is found that corresponds to a minimum observed value
for PHOTO_DET, tighten the lamp setscrew at the approximate minimum value
observed.
Adjust PHOTO_DET within the range of 4400 – 4600 mV.
11. Replace the cover on the analyzer.
GENERAL WARNING/CAUTION
The UV lamp contains mercury (Hg), which is considered hazardous waste. The
lamp should be disposed of in accordance with local regulations regarding
waste containing mercury.
11.3.8. ADJUSTMENT OR REPLACEMENT OF OPTIONAL IZS OZONE
GENERATOR UV LAMP
This procedure details the steps for replacement and initial adjustment of the UV lamp
of the O
3
generator included in the IZS option (OPT-50G). If you are adjusting an
existing lamp, skip to Step 8.
1. Turn off the analyzer.
2. Remove the cover from the analyzer.
3. Locate the O
3
generator (see Figure 3-5).
UV Lamp
Set Screws
O
3
Generator
Body
Lamp
O-ring
Figure 11-4: O
3
Generator Temperature Thermistor and DC Heater Locations
4. Remove the two setscrews on the top of the O
3
generator and gently pull out the old
lamp.
5. Inspect the o-ring beneath the nut and replace if damaged.
6. Install the new lamp in O3 generator housing.
Do not fully tighten the setscrews.
The lamp should be able to be rotated in the assembly by grasping the lamp
cable.
7. Turn on analyzer and allow it to stabilize for at least 20 minutes.
8. Locate the potentiometer used to adjust the O3 generator UV output.
06870C DCN6332