Technical data

Configuration screen, specifies the number of consecutive failure-free batches required for
updating the bin data (range: [1, 1000], default: 24). The NumVals data point (that
determines how quickly an average value changes) is also configurable via the Edit/Compare
Configuration screen (range: [1, 1000], default: 10).
Updating chord proportion bin data values Equation 3-8:
AvgVelChordBin
n+
1
=
A
vgVelChordBin
n
(
NumVals − 1
)
+ V
Chord
NumVals
AvgPr
opChordBin
n+
1
=
A
vgPropChordBin
n
(
NumVals − 1
)
+ Pro p
Chord
NumVals
AvgVel
ChordBin
n+1
=
chord bin (n+1)
th
average velocity (m/s)
AvgVel
ChordBin
n
=
Chord bin n
th
average velocity (m/s)
NumVals =
update factor data point (dimensionless) (NumVals)
V
Chord
=
(current-batch) chord average flow velocity (m/s) (FlowVelA ... FlowVelD)
AvgProp
ChordBin
n+1
=
chord bin (n+1)
th
average proportion value (dimensionless)
AvgProp
ChordBin
n
=
chord bin n
th
average proportion value (dimensionless)
Prop
Chord
=
(current-batch) chord proportion (dimensionless)
3.5 Volumetric flow rate values
The Daniel Liquid Ultrasonic Flow Meter provides two volumetric flow rate values: raw and
flow-condition.
The flow-condition volumetric flow rate can include pressure and/or temperature-
expansion correction for meter body expansion.
Note
A positive volumetric flow rate indicates flow in the forward direction whereas a negative volumetric
flow rate indicates flow in the reverse direction.
Refer to the flow measurement tables in the Daniel 3810 Series Liquid Ultrasonic Product
Datasheet (P/N DAN-LIQ-USM-DS-0306) on the Daniel website:
http://www2.emersonprocess.com/en-US/brands/daniel/Flow/ultrasonics/Pages/
Ultrasonic.aspx
Flow measurement
Operations 21