14.4.1 Set up pressure compensation using the display
Procedure
1. Choose
Menu
>
Configuration
>
Process Measurement
>
Pressure
.
2. Set
Units
to the pressure unit used by the external pressure device.
3. 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.
4. 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.
5. Set
Calibration Pressure
to the pressure at which your sensor was calibrated.
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.
6. Choose the method to be used to supply pressure data, and perform the required setup.
Method
Description
Setup
Polling
The meter polls an external
device for pressure data.
a. Choose
Menu
>
Configuration
>
Process Measurement
>
Pressure Compensation
>
External Pressure
.
b. Set
External Pressure
to On.
c. Choose
Poll External Device
.
d. Select
Polled Variable 1
or
Polled Variable 2
.
e. Set
Variable
to External Pressure.
f. Set
Polling Control
to Poll as Primary or Poll as Secondary.
Option
Description
Poll as Primary
No other HART masters will be on the
network. The Field Communicator is
not a HART master.
Poll as Secondary Other HART masters will be on the
network. The Field Communicator is
not a HART master.
g. Set
External Device Tag
to the HART tag of the external
pressure device.
Measurement support
Configuration and Use Manual
March 2019
MMI-20025166
210
Micro Motion Model 5700 Transmitters with Configurable Outputs