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4.6.2 Configure referred viscosity measurement, ASTM D341
Multi-Curve method
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.
• Configure referred viscosity measurement, ASTM D341 Multi‐Curve method, using
ProLink III
• Configure referred viscosity measurement, ASTM D341 Multi‐Curve method, using the
Field Communicator
Configure referred viscosity measurement, ASTM D341
Multi-Curve method, using ProLink III
ProLink III Device Tools > Configuration > Process Measurement > 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 Device Tools > Configuration > Process Measurement > Referred Viscosity.
2. Set Referred Viscosity Method to ASTM D341 Multi-Curve, and click Apply to refresh the
screen.
3. Define the curve for each process fluid.
a. Enter two temperature values, one in Lower Temperature and one in Higher
Temperature.
Enter the temperature in the currently configured temperature unit.
b. For each temperature, enter the viscosity of your process fluid at that
temperature.
Configure process measurement
Configuration and Use Manual 41