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Option Setup
A value written by
digital communica-
tions
a. Set Pressure Units to the desired unit.
b.
Perform the necessary host programming and communications
setup to write pressure data to the transmitter at appropriate in-
tervals.
Note
If the Weights & Measures application is implemented and the trans-
mitter is secured, digital communications cannot be used to write
temperature data to the transmitter.
Postrequisites
If you are using an external pressure value, verify the setup by choosing ProLink > Process
Variables and checking the value displayed in External Pressure.
4.9.2 Configure pressure compensation using ProLink III
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 Device Tools > Configuration > Process Measurement > Pressure Compensation.
2. Set Pressure Compensation Status to Enabled.
3. Enter Flow Calibration 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 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 Density Factor for your sensor.
Configure process measurement
Configuration and Use Manual 71