10 Advance Optima Ex Analyzer Modules Operator’s Manual 42/24-12-2 EN
Connect the Gas Lines, continued
Housing Purge To preserve atmospheric conditions in the pressure-tight housing, two types of
purge operation are possible:
• Limiting purge gas inlet and outlet pressure to a maximum positive pressure
p
e
≤ 100 hPa (p
abs
≤ 1100 hPa).
• The purge gas is supplied without pressure at the inlet and is extracted from the
outlet.
During operation, purge gas flow should be limited to 10 liters/hour.
Clean instrument air from non-explosive areas or an inert gas is to be used as the
purge gas.
Pressure Sensor
Connection
• If the pressure sensor connection is routed to the outside, the plug must be
removed from the associated flame barrier (see Figure 1, Page 8) before starting
operation.
• The pressure sensor connection should not be joined with the sample gas path.
Gas Path Seal
Integrity Verification
The seal integrity of the sample gas path and reference gas path (if applicable)
within the Ex analyzer module is factory-tested with helium at a leak rate of
< 2 x 10
–4
hPa l/s.
Since gas path seal integrity can be compromised during shipping of the Ex
analyzer module (e.g. by strong vibration) a seal integrity check should be
performed on site prior to startup (see "Check Gas Path Seal Integrity, Page 11).
F
For more information on checking gas path seal integrity during operation see the
"Inspection and Maintenance" section (Page 27).
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