Honeywell SMV 3000 사용자 설명서

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SMV 3000 Transmitter User’s Manual 

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Continued

The SMV 3000 can transmit its output in either an analog 4 to 20
milliampere format or a Digitally Enhanced (DE) protocol format for
direct digital communications with our TPS/TDC 3000 control system. In
the analog format, only a selected variable is available as an output which
can be any one of the following:

• Differential Pressure PV1,

• Static Pressure PV2,

• Process Temperature PV3, or

• Calculated Flow Rate PV4

Note that the secondary variable is only available as a read only parameter
through the SCT or SFC. See Figure 2.

Figure 2

Functional Block Diagram for Transmitter in Analog Mode of Operation.

A/D

∆

P Sensor

                   PV1

Temperature
Sensor
                    SV1

Static Pressure
Sensor
                    PV2

M

u

lt

ip

le

x

e

r

Microprocessor

Proportional 4 to 20mA
output for selected PV
(Digital signal imposed
during SFC
communications).  

D/A

PROM

A/D

PV1 = Differential Pressure
PV2 = Static Pressure
PV3 = Process Temperature
PV4 = Calculated Volumetric
           or Mass Flow
SV1 = Meter Body Temperature
          (Read only) 

O

pe

ra

tin

g

Ch

ar

ac

te

ris

tic

s

Digital I/O