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.

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Analog (Current) output