ETS-Lindgren OMS, Руководство пользователя

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14
Maintenance
Recommended Routine Maintenance
The Sample Draw Oxygen Monitoring System (OMS™) is a continuous gas
detection system that measures and detects hazardous gas leaks in the
workplace, and therefore requires periodic maintenance to ensure proper
operation. The frequency with which this routine maintenance is performed
depends on your environment and company policies. Following are
recommendations intended as a general guideline.
E
VERY
6-12 M
ONTHS
•
Visual checks: Check for power and proper operation. The OMS
should output a 17.34 mA signal when the oxygen level is at 20.9%.
Also, the display should indicate 20.9% oxygen when the oxygen is at
ambient levels.
•
Sensor verification with nitrogen: The ambient oxygen level is
20.9%; therefore, under ambient conditions verification of the OMS to
20.9% oxygen is constantly performed. The OMS requires periodic
testing with nitrogen only to verify the cell response to low oxygen
levels. See Sensor Verification on page 73 for detailed steps.
A
NNUALLY
Depending on the environment, the filter should be replaced every 12 months; in
dusty environments, the filter may need to be replaced more frequently. If the
filter becomes completely blocked, the internal flow sensor will detect the loss of
flow and activate the fault relay and LED.