Model 8712C/U/H Magnetic Flowmeter Transmitters
4-2
PROCESS VARIABLES
The process variables measure flow in several ways that reflect your
needs and the configuration of your flowmeter. When commissioning a
flowmeter, review each process variable, its function and output, and
take corrective action if necessary before using the flowmeter in a
process application
Flow – The actual configured flow rate in the line. Use the Process
Variable Units function to select the units for your application.
Percent of Range – The process variable as a percentage of range
provides a gauge as to where the current flow of the meter is within the
configured range of the flowmeter. For example, the range may be
defined as 0 gal/min to 20 gal/min. If the current flow is 10 gal/min, the
percent of range is 50 percent.
Analog Output – The analog output variable provides the analog value
for the flow rate. The analog output refers to the industry standard
output in the 4–20 mA range. Check the analog output value against
the actual loop reading given by a milliammeter. If it does not match, a
4–20 mA trim is required. See page 4-3
Totalizer – Totalizer provides a reading of the total flow of the
flowmeter since the totalizer was last reset. The totalizer value should
be zero during commissioning on the bench, and the units should reflect
the volume units of the flow rate. If the totalizer value is not zero, it
may need to be reset.
View Other Variables – Pulse Output provides the actual pulse reading
from the meter if your meter includes the pulse output option. This
digital value is always available, even without the pulse output option.
HART Fast Keys 1, 1
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