Martel Electronics BetaGauge 3II - Manual (Page 40)

3-5 Basic Operations
NOTE: The last selection in the list of pressure
units is User, which allows you to define your own
pressure unit for display purposes. Refer to Section
5 for more information.
4. To return to the Setup menu, press the CLR key.
Selecting a Water Column Measurement
In the list of available display units for a BetaPort–P
pressure module, InWC and cmWC are water column
equivalent measurements. If you select a water column
pressure unit, you must also select the appropriate
temperature for water density correction. The available
temperature selections and their recommended use are
listed below:
Temperature Recommended Use
4°C Scientific applications
20°C Industrial applications (ISA)
60°F American Gas Association
If there is any question regarding temperature
compensation, consult the proper engineering authority
at your facility.