6-22 | Model 931S / Model 932S UV Analyzers
11. Click on the Standard Toolbar to start scanning the Measure and
Reference PMT signals.
Model 931S Analyzers:
• Observe the PMT signal of filter 1 if Lamp 1 was replaced.
• Observe the PMT signal of filter 2 if Lamp 2 was replaced.
Model 932S Analyzers:
(This filter assignment is the factory default for Model 932S Multi-Gas
Analyzers. See “Optical Bench” in Chapter 4 for other options.)
• Observe the PMT signals of filter positions 1, 3, and 5 if Lamp 1
was replaced.
• Observe the PMT signals of filter positions 2, 4, and 6 if Lamp 2
was replaced.
To change the Y-axis voltage scale, right-click over the graph. Click
Display and change the Upper limit and Lower limit.
Model 932S Analyzers only:
If the lamp pulse current-control value for a filter location is negative,
that filter location is not used.
12. Align the Source Lamps (see “Source Lamp Alignment” in this
chapter) to ensure optimal operation and then perform another
Auto-Setup.
13. Swing the Microcontroller/Micro-Interface board assembly back to its
original position and tighten the (2) M3 X 8 screws on the mounting
bracket.
14. Change the Flow Control setting to ‘2’ (zero). Click Apply (next to
Flow Control) to set the analyzer into zero Flow Control mode and
then click OK. Do not save the changes to EEPROM. Allow the Zero
gas to flow for 2–3 minutes.
15. From the Status tab, click Conc. Alarm Soft Enable On/Off to enable
the Concentration Alarms then click OK.
Change the Flow Control setting back to ‘0’ (auto). Click OK then
Apply (next to Flow Control). Click OK then save this parameter
change to EEPROM by clicking the Save CFG to EEPROM button on
the Setup tab.
If the Flow Control mode is left in any mode other than ‘0’ (auto),
the message “Flow Control not in Auto” will be displayed in the
Operational Message window on the Status tab.
NOTE
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