Service Serinus 51 User manual 1.0
60
4. Inspect the inside of the PMT housing (by touch or with an inspection
mirror) to check for moisture inside the housing. If moisture is detected
inside the housing, the desiccant pack replacement frequency should be
increased.
5. Reinstall the desiccant cap by gently twisting and pressing the cap back
into the PMT housing. It may help to apply a small amount of lubricant
to the O ring on the desiccant cap. Secure with two screws.
Caution
Do not attempt to insert the desiccant cap into the
PMT housing by using the screws to pull the cap
into place. This will damage the PMT housing.
6. Reconnect power and restart the analyzer.
6.4.9 Replace DFU filter
1. Turn off analyzer and remove power
2. Remove DFU from kynar nut by pulling and twisting slightly if any
resistance.
3. Remove tubing connected to the DFU on the other side
4. Replace DFU and ensure that the flow is in the correct direction (arrows
points toward tubing)
6.4.10 Check UV lamp alignment
Required equipment:
Oscilloscope
Proper operation of the UV lamp is essential to the Serinus 51. The UV lamp should
be checked yearly to ensure it is operating within acceptable parameters and may
require realignment to maintain sufficient UV light for analyzer operation. The UV
lamp will need to be adjusted only when the “Reference gain pot” goes above 200 or
below 5. Following are procedures to check, align, and replace the UV lamp
assembly.
Warning
The Lamp Driver PCA can generate in excess of 1000
volts. Exercise extreme care when working in the
vicinity of the Lamp Driver.
Caution
If the UV lamp is adjusted, the analyzer will require
recalibration.
1. Turn the analyzer on and allow the UV lamp to warm up and stabilize
(about 30 minutes).
2. Connect an oscilloscope to TP19 (SO
2
REFX2) on the Main controller
board and TP1 (AGND). Adjust the scope for 0.5 V/division and 20
msec/division.
3. Loosen the collets (do not remove) at each end of the lamp (Figure 28).
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