6-38 | Model 931S / Model 932S UV Analyzers
b. Connect the terminals of the green/yellow ground wire.
c. Connect the following wiring connectors to the Micro-Interface
board:
• Measuring Cell RTD line to J300.
• RS-422 communication line to J104.
• Micro-Interface AC power line to J200.
• DC power line to J103.
• Optional: If your analyzer has a Cell Heater, connect the
Heater Cartridge wire (marked ‘N’) to J200 (Terminal 2) and
the Overtemp Switch wire (marked ‘L’) to J200 (Terminal 1).
d. Optional: If using, connect the purge line (black tube) to the
Optical Bench Purge Fitting.
Use a soft, nonabrasive cloth to gently clean the joining areas (flame-
path) of the Upper Enclosure and its door. Replace the (24) M10
screws and tighten them to 9.0 Nm, ±1.0 Nm (80 in.-lb, ±9 in.-lb).
9. Power up the analyzer and computer.
10. Allow the analyzer to warm up then perform a leak check on the
sample system fittings that were disconnected. See “Sample System
Leak Check” in Chapter 3.
11. Perform an Auto-Setup.
12. After the Auto-Setup is complete, change the Flow Control setting
to ‘2’ (zero). Click Apply (next to Flow Control) to set the analyzer
into zero Flow Control mode. Click the ManZero button to initiate
a Manual Zero then click OK. Do not save the changes to EEPROM.
Allow the Zero gas to flow for 2–3 minutes.
13. After the Zero is complete, change the Flow Control setting back to
‘0’ (auto). Click 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.
14. If the analyzer uses measured Pressure Compensations (optional),
return the setting to measured.
!
CAUTION
Setup (tab)Optical
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