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222 Analog (Current) output
Section 6: Meter operation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
Velocity content output scaling
When the analog output represents either average gas or sound velocity (selected via the
AO1Content data point or AO2Content with the Expansion Board with HART® installed), then
the maximum scale velocity is specified via the AO1MaxVel or AO2MaxVel (with the
Expansion Board with HART® installed) data point and the minimum scale velocity is specified
via the AO1MinVel or AO2MinVel with the Expansion Board with HART® installed) data point.
These points respectively correspond to the maximum output (20 mA) and the minimum
output (4 mA). The analog output is forced to 3.5 mA when the selected data content is invalid.
Energy rate output scaling
When the analog output represents the energy rate (selected via the AO1Content data point or
AO2Content with the Expansion Board with HART® installed), then the full-scale energy rate is
specified via the AO1FullScaleEnergyRate data point or AO2FullScaleEnergyRate (with the
Expansion Board with HART® installed). This is the energy rate that corresponds to the
maximum output (20 mA). The minimum output (4 mA) corresponds to zero energy rate. The
analog output is forced to 3.5 mA when the energy rate is invalid.
Mass rate output scaling
When the analog output represents the mass rate (selected via the AO1Content data point or
AO2Content with the Expansion Board with HART® installed), then the full-scale mass rate is
specified via the AO1FullScaleMassRate data point or AO2FullScaleMassRate (with the
Expansion Board with HART® installed). This is the mass rate that corresponds to the maximum
output (20 mA). The minimum output (4 mA) corresponds to zero mass rate. The analog output
is forced to 3.5 mA when the mass rate is invalid.