Chapter Four: Analog and Digital Interfaces Digital Interface Input and Output Options
42
beginning the procedure.
Device is installed in the orientation intended for final use (i.e. horizontal base down, vertical flow up,
etc.).
Device is powered at operating temperature, preferably for 30 or more minutes.
Devices subject to ambient temperatures other than room temperature (23º C) should be zeroed under
those conditions.
Pressure drop and flow across the device is reduced to zero. Depending on the gas panel configuration,
this may be done by one of the referenced procedures. See Chapter 7 Maintenance for zeroing procedures.
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