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Configuration and Use Manual 15
Startup
Startup ConfigurationCalibrationBefore You Begin
2.7.3 Configuring a pressure source
You will need to choose one of two sources for pressure data:
• Analog Output function block – This option allows you to poll for pressure data from an
external pressure source.
• Fixed pressure data – This option uses a known, constant pressure value.
Note: If you configure a fixed pressure value, ensure that it is accurate. If you configure polling for
pressure, ensure that the external pressure measurement device is accurate and reliable.
If you configure pressure compensation to use an AO block for pressure compensation, the other AO
block remains available for temperature compensation. However, only one of the AO blocks can be
set up for external pressure.
To configure fixed pressure data, refer to the menu flowcharts in Figure 2-5.
To configure an AO function block for pressure compensation:
• With the EDD, refer to the flowchart in Figure 2-6.
• With bus parameters, refer to the flowchart in Figure 2-7.
• With the display, refer to the menu flowcharts in Figure B-15.
Figure 2-6 Configuring an AO function block for pressure compensation – EDD
Function Block
Analog Output 1
Set IN Channel to
Pressure
Parameters >
General
Analog Output 2
MMI Coriolis Flow
Transducer Block
Compensation
AO Compensation
Note: When setting the IN channel
to Pressure via the EDD, the OUT
channel will be automatically set
to Pressure as well. Setting the IN
channel via bus parameters does
not automatically change the OUT
channel. You must manually set the
OUT channel to Pressure or the
block will go into Out of Service
mode.