Concoa 5803007, Инструкция по установке и эксплуатации, Страница: 45 / 60

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6: Maintenance & Sensor Verification
Only qualified personnel should perform maintenance and sensor verification
6.1 Sensor Verification, O
2
The earth is a wonderful source of calibrated oxygen at 20.9%, therefore under ambient
conditions verification of the
Dual O2/CO2 monitor to 20.9% oxygen is constantly being
performed. As the oxygen sensor ages over time, it may require a slight adjustment to
20.9%. The O
2
monitor also requires periodic testing with n
itrogen to verify the cell’s
response to 0% oxygen.
6.1.1 Sensor Verification Gas
For testing the Dual O2/CO2 O
2
monitor, CONCOA recommends the use of nitrogen.
This can be purchased from your gas supplier or from CONCOA Monitoring Systems.
NOTE: If the instrument is connected to a controller, set the controller to the
standby mode to avoid accidental alarms.
NOTE: If your safety protocol requires, you may subject the air check monitor to
different concentrations of oxygen span gas.