6. Set
Volume Total Label
to the name you want to use for the volume total and volume inventory unit.
The special measurement unit is stored in the transmitter. You can configure the transmitter to use the
special measurement unit at any time.
Defining a special measurement unit for volume flow
You want to measure volume flow in pints per second (pints/sec).
1. Set
Base Volume Unit
to Gallons (gal).
2. Set
Base Time Unit
to Seconds (sec).
3. Calculate the conversion factor:
a. 1 gal/sec = 8 pints/sec
b.
Volume Flow Conversion Factor
= 1 ÷ 8 = 0.1250
4. Set
Volume Flow Conversion Factor
to
0.1250
.
5. Set
Volume Flow Label
to
pints/sec
.
6. Set
Volume Total Label
to
pints
.
4.3.3 Configure Volume Flow Cutoff
Display
Menu
>
Configuration
>
Process Measurement
>
Flow Variables
>
Volume Flow Settings
>
Low Flow
Cutoff
ProLink III
Device Tools
>
Configuration
>
Process Measurement
>
Flow
>
Volume Flow Cutoff
Field Communicator
Configure
>
Manual Setup
>
Measurements
>
Flow
>
Volume Flow Cutoff
Volume Flow Cutoff
specifies the lowest volume flow rate that will be reported as measured. All volume flow
rates below this cutoff are reported as 0.
Procedure
Set
Volume Flow Cutoff
to the value you want to use.
•
Default: 0.0 l/sec (liters per second)
•
Range: 0 l/sec to
x
l/sec, where
x
is the sensor’s flow calibration factor, in units of l/sec, multiplied by 0.2
Interaction between Volume Flow Cutoff and mAO Cutoff
Volume Flow Cutoff
defines the lowest liquid volume flow value that the transmitter will report as measured.
mAO Cutoff
defines the lowest flow rate that will be reported via the mA Output. If
mA Output Process
Variable
is set to Volume Flow Rate, the volume flow rate reported via the mA Output is controlled by the
higher of the two cutoff values.
Volume Flow Cutoff
affects both the volume flow values reported via the outputs and the volume flow values
used in other transmitter behavior (e.g., events defined on the volume flow).
mAO Cutoff
affects only flow values reported via the mA Output.
Cutoff interaction with mAO Cutoff lower than Volume Flow Cutoff
Configuration:
Configure process measurement
Configuration and Use Manual
March 2019
MMI-20025166
40
Micro Motion Model 5700 Transmitters with Configurable Outputs