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The density factor is the change in fluid density, in g/cm
3
/PSI. When entering the
value, reverse the sign.
Example:
If the density factor is 0.000006 g/cm
3
/PSI, enter −0.000006 g/cm3/PSI.
6. Set Pressure Source to the method that the transmitter will use to obtain pressure
data.
Option Description
Poll for external value
The transmitter will poll an external pressure device, using
HART protocol over the primary mA output.
Static or Digital Communications
The transmitter will use the pressure value that it reads from
memory.
• Static: The configured value is used.
• Digital Communications: A host writes transmitter data
to transmitter memory.
Note
If the Weights & Measures application is implemented and
the transmitter is secured, digital communications cannot
be used to write temperature data to the transmitter.
7. If you chose to poll for pressure data:
a.
Select the Polling Slot to use.
The transmitter has two polling slots. You can use one for pressure and the other
for temperature, if concentration measurement or petroleum measurement is
enabled.
b. Set Polling Control to Poll as Primary or Poll as Secondary, and click Apply.
Tip
• Poll as Primary: No other HART masters will be on the network.
• Poll as Secondary: Other HART masters will be on the network. The Field Communicator
is not a HART master.
c. Set External Device Tag to the HART tag of the external pressure device, and click
Apply.
8.
If you chose to use a static pressure value:
a. Set Pressure Unit to the desired unit.
b. Set Static or Current Pressure to the value to use, and click Apply
Configure process measurement
72 Micro Motion
®
Model 2700 Transmitters with Analog Outputs