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Verify Functionality Using Diagnostic Alarms
Pressure Loss Alarm
Should the incoming signal from the pressure transducer indicate a negative
pressure, a Pressure Loss alarm flag will be initiated immediately and without delay.
Outdoor Air Temperature Sensor Loss Alarm
Should the OA Temp Input to the monitor go either high (input short) or low (input
open), an OA Sensor Loss alarm flag will be initiated immediately and without delay.
Enclosure Temperature Loss
Should the ENC TEMP input to the monitor representing the transducer temperature
go either high (input short) or low (input open), an Encl Temp Loss alarm flag will be
initiated immediately and without delay.
Loss of Enclosure Heater
Should the enclosure temperature fall to eleven degrees below the enclosure
temperature set point, an Enclosure Heater Alarm flag will be initiated after the time
delay period. Should the heater alarm flag continue for a period of one hour, a
heater malfunction flag will be initiated.
Auto-Zero Valve Malfunction
Should the pressure
transducer’s auto-zero valve malfunction, the Auto Zero Valve
alarm flag will be initiated immediately and without delay.
Memory Loss Alarm
Indicates there has been a loss of nonvolatile memory parameters. The Memory
Loss alarm will occur immediately and without delay.
Checksum Error Alarm
Indicates that there is a memory checksum error. The Checksum Error alarm will
occur immediately and without delay.
