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1/99 SMV 3000 Transmitter User’s Manual 5
1.3 SMV 3000 Smart Multivariable Transmitters, Continued
SMV Operating
Modes, continued
In the digital DE protocol format, all four process variables are available
for monitoring and control purposes; and the meter body temperature is
also available as a secondary variable for monitoring purposes only - See
Figure 3.
Figure 3 Functional Block Diagram for Transmitter in Digital DE Mode of Operation.
A/D
∆P Sensor
PV1
Temperature
Sensor
SV1
Static Pressure
Sensor
PV2
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Microprocessor
Meter Body
Electronics Housing
Pressure
Digital signal broadcasts
up to 4 PVs plus
secondary variable in
floating point format over
20mA loop.
Factory
Characterization
Data
Digital I/O
PROM
A/D
RTD or
Thermocouple
Input
PV3
PV4
PV1 = Differential Pressure
PV2 = Static Pressure
PV3 = Process Temperature
PV4 = Calculated Volumetric
or Mass Flow
SV1 = Meter Body Temperature
(Monitoring purposes only)
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Transmitter
adjustments
The SMV 3000 transmitter has no physical adjustments. You need an SCT
to make any adjustments in an SMV 3000 transmitter. Alternately, certain
adjustments can be made through the Universal Station if the transmitter is
digitally integrated with our TPS/TDC 3000 control system.