Enmet ISA-44-2OD Manual do Utilizador descarregar pdf (Página 19)

ISA-44-2-OD ENMET Corporation

7. Put the cal cup of the calibration fixture over the sensor. Let the gas flow over the sensor until the alarm triggers.

Use Table 6 for the approximate allowable time period until alarm:

Table 7: Approximate Alarm Time

Gas or Vapor Time to Alarm

20 ppm CO 5 - 7 minutes

50 ppm CO 5 minutes

200 ppm CO 2 minutes

10% LEL methane 1 minute

20% LEL methane 1 minute

100 ppm vinyl chloride 1 - 2 minutes

typical hydrocarbon vapors 1 - 2 minutes

20% LEL propane 1 minute

8. After you verify the alarm response, turn the gas off and remove the calibration fixture from the gas cylinder.

9. Turn the switch back to OPERATE.

CAUTION: If steps 1 - 10 do not trigger the alarms, and no electrical or mechanical malfunction is apparent, you must

recalibrate the instrument.

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Enmet ISA-44-2OD Manual do Utilizador Página 19