Emerson Micro-Motion 2400S, Configuration And Use Manual, Page: 104 / 198

96 Micro Motion
®
Model 2400S Transmitters with Analog Outputs
Pressure Compensation, Temperature Compensation, and Polling
9.2.2 Pressure correction factors
When configuring pressure compensation, you must provide the flow calibration pressure – the
pressure at which the flowmeter was calibrated (which therefore defines the pressure at which there
will be no effect on the calibration factor). Enter 20 PSI unless the calibration document for your
sensor indicates a different calibration pressure.
Two additional pressure correction factors may be configured: one for flow and one for density. These
are defined as follows:
• Flow factor – the percent change in the flow rate per psi
• Density factor – the change in fluid density, in g/cm
3
/psi
Not all sensors or applications require pressure correction factors. For the pressure correction values
to be used, obtain the pressure effect values from the product data sheet for your sensor, then reverse
the signs (e.g., if the flow factor is 0.000004 % per PSI, enter a pressure correction flow factor of
–0.000004 % per PSI).
9.2.3 Configuration
To enable and configure pressure compensation:
• With ProLink II, see Figure 9-1.
• With the Communicator, see Figure 9-2.
Figure 9-1 Configuring pressure compensation with ProLink II
Enter Flow factor
Configure
Enter Density factor
Enter Cal pressure
Go to Polling
Setup
(2)
Disable polling for
pressure
(3)
Enter External
Pressure
Enable External Pressure
Compensation
Enable
Apply
Enter Pressure units
Set measurement unit
(1)
Poll?
Static?
Done
Apply
View >
Preferences
ProLink >
Configuration >
Pressure ProLink >
Configuration >
Pressure
Apply
Apply
(1) Pressure measurement unit must be configured to match pressure
unit used by external device. See Section 6.4.
(2) See Section 9.4.
(3) If previously configured. Polling for temperature is allowed. See
Section 9.4.