6-40 | Model 933S UV Analyzer
Source Lamp Alignment
If the
Measure
or
Reference
PMT voltage reaches 10000 mV at any time
during the alignment manipulations (while rotating a lamp), decrease the
PMT Level, allow the analyzer to stabilize for approximately 10 minutes,
and perform an Auto-Setup to reset the PMT signals before continuing.
To align the source lamps:
1. From the
Optical Bench
dialog box, ensure the
ALC On
check box is
disabled (not checked). Click
OK
.
2. Loosen – but do not remove – the (2) M3 x 8 screws on the Optical
Bench Microcontroller mounting bracket and swing the
Microcon-
troller/Micro-Interface
board assembly outward.
3. Slightly loosen the Lamp Clamping and Lamp Retaining screws (Fig-
ure 6-2).
4. View the
93XS Configurator
window to observe the voltage signal
from the
Measure
PMT for each filter. To do this, open the Configurator
file “
M933S.dyc
” (Figure 6-9) to display two Trend graphs.
While viewing the signals on the
93XS Configurator
window, slowly
rotate the new lamp(s) to obtain the maximum voltage signal from the
Measure
PMT.
Cadmium lamps:
Filters 1, 3, and 5 – Lamp 1
Copper lamps:
Filters 2 and 6 – Lamp 2
Since the software is updated at one-second intervals use slow, small
movements, pausing each turn to view the new value.
Because the Automatic Lamp Control is turned off (
ALC On
= un-
checked), the signals may not be completely steady.
5. Loosen the Lamp Locking Screw.
6. To obtain the maximum signal from the
Measure
PMT voltage, adjust
the Lamp Adjusting Screw for the lamp that is being adjusted.
7. If the other lamp was also replaced, repeat Steps 4–6.
8. Tighten the Lamp Locking Screw.
9. Tighten the Lamp Clamping Screw to secure the lamps. Do not over-
tighten; the spring should not be collapsed.
NOTE
File
Open
Configuration
<<M933S.dyc>>
Summary of Contents for 933S
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Page 52: ...3 6 Model 933S UV Analyzer Figure 3 1 Analyzer backpan dimensions European...
Page 91: ...Installation and Start Up 3 45 Figure 3 24 Column Profile...
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Page 190: ...6 14 Model 933S UV Analyzer Figure 6 3 1 Standard Range Cell 40 cm or smaller...
Page 191: ...Maintenance and Troubleshooting 6 15 Figure 6 3 2 Low Range White Cell 81 2 cm P N 100 1780 1A...
Page 197: ...Maintenance and Troubleshooting 6 21 Figure 6 4 Column Block assembly...
Page 246: ...6 70 Model 933S UV Analyzer Figure 6 18 Microcontroller board P N 100 1781 SW400...
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Page 272: ...A 8 Model 933S UV Analyzer Lower Enclosure Layout WX 14838...
Page 274: ...A 10 Model 933S UV Analyzer RS 232 Communications Cable Connections 300 9480...
Page 279: ...Appendix A Drawings A 15 Optical Bench Board P N 100 1662...
Page 280: ...A 16 Model 933S UV Analyzer PMT Buffer Board 100 0140...
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