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Configure process measurement
•
4.5
Configure referred viscosity measurement
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.
Restriction
This feature is available only on the HFVM-B. It is not available on the HFVM-R.
Important
To achieve the highest accuracy in referred viscosity measurement, consult Micro Motion customer
service during configuration. Measurement accuracy is affected by many factors.
Three methods are available to calculate referred viscosity. These methods are described
in the following table.
Table 4-2:
Referred viscosity calculation
method
ASTM D341 Single-Curve
ASTM D341 Multi-Curve
Matrix Referral
4.5.1
Configure referred viscosity measurement, ASTM D341
Single-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 single-curve method is used only with petroleum products.
It is used when the meter will measure only one process fluid.
36
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Verify that the host is writing to the correct register in memory, using the correct data
type.
If necessary, apply an offset.
Configuration methods for referred viscosity
Micro Motion
Description
•
Based on ASTM D341 standards
•
Applicable only to petroleum products
•
Used when the meter will measure only one process fluid
•
Based on ASTM D341 standards
•
Applicable only to petroleum products
•
Supports measurement of two to eight process fluids from
one configuration
•
Not based on ASTM D341 standards
•
Applicable to all process fluids
•
Supports measurement of two to six process fluids from one
configuration
®
Heavy Fuel Viscosity Meters (HFVM) Viscomaster
™
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