5-16 | Model 900 ADA / Model 930 Sulfur Pit Analyzers
13. Close the Oven fuse to apply power to its Heater. Close and secure the
Electronics Enclosure door with its (3) M6 screws to secure the Optical
Bench in place. Close and latch the Oven door. Close and secure all
other analyzer covers and doors, if not already done.
Allow the analyzer to warm up to operating temperature and stabilize
(approximately two hours). When the analyzer is at operating tem-
perature, open the Vent Valve on the ASR900 Sample Probe and then
open its Sample Valve to allow sample gas into the analyzer sample
system.
14. Purged Analyzers Only:
Return the Purge Bypass Switch to the “ACTIVE” position and re-
move the key (follow company policy).
15. Manually Zero the analyzer.
Change the Flow Control setting back to Analyzer Control mode.
16. Adjust the Aspirator Drive Air Regulator to achieve normal operating
flow rates.
The procedure is complete.
(FlowCtrl) CALF5 0
Del 0 Ent
See “Setting the
Sample Gas Flow Rate and
Sample Response Time” in
Chapter 3.
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