Remote Air Module

The OAM contains the air velocity sensor (a

specialized differential pressure transducer), V/F

conversion circuitry and solenoid for auto-zero

function. Advanced digital signal processing produces

a highly accurate reading of even the noisiest flow

signals. The auto-zero solenoid connects to the air velocity

pressure transducer's inlet ports to enable automatic

periodic re-calibration. This re-calibration ensures

accurate, drift-free airflow measurement. Automatic

re-calibration of the differential pressure transducers

occurs upon system power-up and when airflows are

stable with frequency selectable from 1 to 6 times a

day.