Ametek 933S, Operator'S Manual

Page: 185 / 288

Maintenance and Troubleshooting
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6-9

See Chapter 7 for
spare part ordering numbers.
Measuring Cell Maintenance
This procedure discusses a Standard Range Measuring Cell (40 cm or
smaller, Figure 6-3.1) and a Low Range/White Cell (81.2 cm, Figure 6-3.2).
See also Figure 6-2 to locate and identify parts. Other types of Measuring
Cells are discussed in
Manual Supplements shipped with the analyzer.
Replace/clean parts in the Measuring Cell:
• Every year.
• Any time an unscheduled cleaning is performed.
• If the analyzer responds slowly to a Zero when the sample system is
free of restrictions.
• If evidence of contamination is present in the sample tubing.
“P/N” refers to Part Number.
To clean and replace parts in the Measuring Cell (see Figures 6-1, 6-2, and
6-3.1 or 6-3.2):
Hazardous Locations
Before proceeding, test the area around the analyzer for explosive
gases and proceed only when the area is found to be safe.
Do not remove the cover of the Explosion-Proof Digital Communica-
tions Port on the front of the Lower Enclosure, do not connect a serial
cable to the Communications Port, do not open the Upper/Lower En-
closures, and do not power up/down the analyzer or computer if there
is an explosive gas atmosphere present.
1. Connect a serial cable between the computer and the analyzer’s Com-
munications Port. Using the Configurator Software, change the Flow
Control setting to ‘ 3 ’ ( zero ). Click OK then Apply . Do not save the
changes to EEPROM.
2. Analyzer with Heated Cells:
Remove the Insulating Jacket or open the Oven door to allow the Cell
to cool down enough to work on it.

Setup (tab)

Gas Calibration<<Flow
Control>>

NOTE
!
WARNING