Emerson Micro Motion 2500, Configuration And Use Manual

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The calibration pressure is the pressure at which your sensor was calibrated, and
defines the pressure at which there is no pressure effect. If the data is unavailable,
enter
20 PSI.
5. Enter Flow Factor for your sensor.
The flow factor is the percent change in the flow rate per PSI. When entering the
value, reverse the sign.
Example: If the flow factor is 0.000004 % per PSI, enter −0.000004 % per PSI .
6. Enter Density Factor for your sensor.
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.
7. 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.
Fixed Value or Digital Communi-
cations
The transmitter will use the pressure value that it reads from
memory.
• Fixed Value: 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 or pressure data to the trans-
mitter.
8. If you chose to poll for pressure data:
a. Select the Polling Slot to use.
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.
Configure process measurement
Configuration and Use Manual 59