TechnipFMC Smith Meter MPU 1600c, Installation, Operation & Maintenance Manual

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Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 55
MPU Series C I/O/M Manual Web User Inteface
6.4.2.9.3. Max VOS Deviation
Maximum deviation between the measured velocity of sound on any two paths.
The value is set by the factory and not typically adjusted unless otherwise instructed.
6.4.2.9.4. Min Signal to Noise Ratio
Signal to Noise Ratio measures the amount of signal noise being measured with the
ultrasonic sound signals. A lower reading indicates increased noise. This limit sets the
low limit value. This is set by the factory and not typically adjusted unless otherwise
instructed.
6.4.2.9.5. Max Turbulence Level
Turbulence is a measure of the variability of the flow rate. This limit sets the high level
alarm.
6.4.2.9.6. Max Swirl/Crossflow Deviation
The meter will alarm when the maximum % transverse flow is detected. This limit
sets this percentage.
6.4.2.9.7. Min and Max Flow Rate
Alarm on the minimum and maximum flow rate, in engineering units.
6.4.2.9.8. Max Profile Flatness Deviation
Maximum percentage deviation in flatness across the meter.
6.4.2.9.9. Maximum Profile Symmetry Deviation
Maximum allowable profile symmetry.
6.4.2.9.10. Low Flow Cutoff
When the measured flow drops below this value the meter will output zero flow. The
low flow cutoff prevents random noise from registering as flow when the meter is in a
shut in situation. The flowrate cutoff selector feature allows the user to turn the cutoff
function on or off. This is a new feature for software versions 1.9 and higher.
6.4.2.9.11. Low Flow Cutoff Selector
The flowrate cutoff selector feature allows the user to turn the cutoff function on or off
for only the flow rate output; the accumulators always have cutoff applied. This is a new
feature for software versions 1.9 and higher.