ENMET MED AIR 2000, Руководство по эксплуатации и обслуживанию, Страница: 14 / 30

ENMET Corporation M
ED
A
IR
2000
10
4.7 Fault Indications
4.7.1 Low Flow Indication
A sensitive pressure switch is used to furnish a low flow indication. When the sample air pressure drops below
approximately 30
PSIG
, the fault light and audio alarm are activated, and the display reads either "Flow: no" or "Flow:
n", depending upon the number of sensors installed in the instrument.
4.7.2 Other Fault Indications
Other fault indications are associated with sensor zero and calibration activities, and are described in the maintenance
section 5.0 of this manual.
4.8 Dew Point Sensor Response
It is a characteristic of this solid state sensor that it takes more time to extract moisture from it by passing dry air over
it, than it does to add moisture to it by passing moist air over it. Therefore, the time response of the sensor to a step
change from moist to dry air is relatively slow, while the response to a step change from dry to moist air is rapid.