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9. If you want to use digital communications, click Apply, then perform the necessary
host programming and communications setup to write temperature data to the
transmitter at appropriate intervals.
Postrequisites
If you are using an external pressure value, verify the setup by checking the External Pressure
value displayed in the Inputs area of the main window.
4.7.3 Configure pressure compensation using the
Field Communicator
Prerequisites
You will need the flow factor, density factor, and calibration pressure values for your
sensor.
• For the flow factor and density factor, see the product data sheet for your sensor.
• For the calibration pressure, see the calibration sheet for your sensor. If the data is
unavailable, use 20 PSI.
Procedure
1.
Choose Online > Configure > Manual Setup > Measurements > External Pressure/Temperature >
Pressure.
2. Set Pressure Compensation to Enabled.
3. Enter Flow Cal Pressure for your sensor.
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.
4. Enter Flow Press 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.
5. Enter Dens Press 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.
6. Determine how the transmitter will obtain pressure data, and perform the required
setup.
Configure process measurement
Configuration and Use Manual 55