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If a checkbox is checked, the internal RTD temperature is used for that
measurement or calculation. If a checkbox is unchecked, the external
temperature is used.
Postrequisites
If you are using external temperature data, verify the external temperature value displayed
in the Inputs group on the ProLink III main window .
Need help? If the value is not correct:
• 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.
Configure referred viscosity measurement, ASTM D341
Multi-Curve method, using the Field Communicator
Field Communicator Configure > Manual Setup > Measurements > Optional Setup > Referred Viscosity
Overview
Referred viscosity is line viscosity corrected to a reference temperature. In other words, this
is the viscosity that the device would report if the line temperature matched the reference
temperature. The ASTM D341 multi-curve method is used only with petroleum products.
It is used when the meter will measure two to eight process fluids.
You can set up referred viscosity calculations for up to eight process fluids.
Important
Use the ASTM D341 Multi-Curve method only with petroleum products.
Prerequisites
For each process fluid, you must know its viscosity at two temperatures.
Procedure
1. Choose Configure > Manual Setup > Measurements > Optional Setup > Referred Viscosity.
2. Set Referred Viscosity Calculation Method to ASTM D341 Multi.
3. Choose ASTM D341 Multi.
Configure process measurement
Configuration and Use Manual 43