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• Ensure that the external device and the meter are using the same measurement unit.
• For polling:
- Verify the wiring between the meter and the external device.
- Verify the HART tag of the external device.
• For digital communications:
- Verify that the host has access to the required data.
- Verify that the host is writing to the correct register in memory, using the correct data
type.
• If necessary, apply an offset.
4.7.2 Set up the API referral application using the
Field Communicator
This section guides you through the tasks required to set up and implement the API
referral application.
1. Enable the API referral application using the Field Communicator
2. Configure API referral using the Field Communicator
3. Set up temperature and pressure data for API referral using the Field Communicator
Enable the API referral application using the
Field Communicator
The API referral application must be enabled before you can perform any setup. If the API
referral application was enabled at the factory, you do not need to enable it now.
1. Choose Overview > Device Information > Applications > Enable/Disable Applications.
2. If the concentration measurement application is enabled, disable it.
The concentration measurement application and the API referral application cannot
be enabled simultaneously.
3. Enable the API referral application.
Configure API referral using the Field Communicator
The API referral parameters specify the API table, measurement units, and reference values
to be used in referred density calculations.
Prerequisites
You will need API documentation for the API table that you select.
Depending on your API table, you may need to know the thermal expansion coefficient
(TEC) for your process fluid.
You must know the reference temperature and reference pressure that you want to use.
Configure process measurement
Configuration and Use Manual 59