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1/99 SMV 3000 Transmitter User’s Manual 3
1.3 SMV 3000 Smart Multivariable Transmitters
About the Transmitter
The SMV 3000 Smart Multivariable Transmitter shown in Figure 1
measures three separate process variables and calculates volumetric or
mass flow rate for gases, steam or liquids for output over a 4 to 20
milliampere, two-wire loop. Its general design is based on the field proven
technology of our ST 3000 Smart Pressure Transmitter and meets the
same high performance standards.
Figure 1 SMV 3000 Transmitter Handles Multiple Process Variable
Measurements and Calculates Flow Rate
Electronics
Housing
Meter body
The SMV 3000 transmitter accepts process temperature signals from an
external Resistance Temperature Detector (RTD) or any one of several
common thermocouple types. Its unique measurement sensor
simultaneously handles differential pressure, static pressure, and meter
body temperature signals while a separate circuit processes the process
temperature input. Note that the static pressure (absolute or gauge) is read
from the high pressure side of the meter body.
Using stored equations in conjunction with the multiple process variable
inputs, the SMV 3000 calculates a compensated volumetric or mass flow
rate output for gases, liquids and steam. Its output signal is proportional to
the calculated differential flow rate.
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