Teledyne 6200A - Sulfides analyzer - Manual (Page 202)

TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
NOTE
The operations outlined in this chapter are to be
performed by qualified maintenance personnel only.
If the UV LAMP display is lower than 1000mV after peak adjustment, it is recommended to
replace the lamp. Most UV lamps that produces UV lamp reading above 1000 mV are still in
good condition. UV LAMP reading below 600 mV will cause the instrument to display
XXXXX.X.
9.4.3 UV Filter Replacement
To replace the UV filter, proceed as followings;
1. Turn off the instrument’s power and remove the power cord from the instrument.
2. Unplug J4 connector from the motherboard to allow tool access.
3. Remove 4 screws from the shutter cover (refer to Figure 9-7) and remove the cover .
4. Remove 4 screws from the UV filter retainer.
5. Carefully remove the UV filter.
6. Install the UV filter. Handle carefully and never touch the filter’s surface. UV filter’s wider
ring side should be facing out.
7. Install UV filter retainer and tighten screws.
8. Install the shutter cover and minifit connector. Tighten 4 screws.
9. Plug J4 connector into the motherboard.
9.4.4 Shutter System
The shutter is used to check the PMT and correct for the dark current drift. It consists of the
solenoid and shutter blade which is controlled by the valve control circuit in the PSM (power
supply module). It can be manually energized to verify its functionality.
1. Press DIAG, then press ENTR to select SIGNAL I/O. Then scroll to number five (5) and
toggle OFF to ON to energize the solenoid.
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