Use Pvr, Tbr, And Tmr; Production Volume Reconciliation (Pvr); Transient Bubble Remediation (Tbr); Transient Mist Remediation (Tmr) - Emerson Micro Motion 5700 Configuration And Use Manual

Measurement support
March 2019

14.2 Use PVR, TBR, and TMR

For detailed information about Production Volume Reconciliation (PVR), Transient Mist Remediation (TMR),
and Transient Bubble Remediation (TBR), see the Micro Motion
Restriction
PVR, TBR, and TMR are available only with a transmitter that is ordered with one of these software options:
• An 800 Enhanced Core Processor version 4.4 and later
• HART with HART 7 enabled in order to view process variables over HART (default)
Restriction
PVR, TBR, and TMR process variables are available only over HART with HART 7 enabled (default). PVR,
TBR, and TMR parameters cannot be configured with HART.
14.2.1 PVR, TBR, and TMR applications
PVR, TBR, and TMR are applications designed to provide more accurate process data in the presence of
multiple phases. For example, if bubbles are present in the process fluid, or the process fluid is flashing, the
volume measurements are often incorrect.

Production Volume Reconciliation (PVR)

• Provides oil and water volumes through density-based calculations for both line and reference conditions
• Detects bubble entrainment or flashing in the sensor, and can correct volumes accordingly
• Best for undersized three-phase separators that frequently have intermittent gas or water contamination
in the oil leg
• Offers a simple, low-cost solution for net oil and net water measurement for two-phase separators

Transient Bubble Remediation (TBR)

• Used with single-component liquid streams that may experience intermittent low levels of gas
entrainment, that is, gas carryunder
• Enables accurate measurement of a single fluid during periods of entrained gas by providing a substitute
density value based on the immediately preceding process density (standard configuration)
• Tracks total time of aerated flow to assist in diagnosing process issues that may cause aeration

Transient Mist Remediation (TMR)

• Used with gas streams that may experience intermittent low levels of liquid entrainment, i.e., liquid carry-
over
• Allows gas measurement to continue during periods of entrained liquid (mist) by providing a substitute
flow rate value based on the immediately preceding process flow rate
• Returns to reporting the measured flow rate when the mist interval is over, increased or decreased by a
maximum of 10%, until flow totals are appropriately adjusted for the unmeasured flow
• Provides an indication of the amount of time that liquid was present in the stream — identifying process
improvements to reduce gas stream contamination
206
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Oil and Gas Production Applications manual.
Micro Motion Model 5700 Transmitters with Configurable Outputs
Configuration and Use Manual
MMI-20025166