Mass Flow Cutoff
specifies the lowest mass flow rate that will be reported as measured. All mass flow rates
below this cutoff will be reported as 0.
Procedure
Set
Mass Flow Cutoff
to the value you want to use.
•
Default: A sensor-specific value set at the factory. If your transmitter was ordered without a sensor, the
default may be 0.0.
•
Recommendation: 0.5% of maximum flow rate of the attached sensor. See the sensor specifications.
Important
Do not use your meter for measurement with
Mass Flow Cutoff
set to 0.0 g/sec. Ensure that
Mass Flow
Cutoff
is set to the value that is appropriate for your sensor.
Effect of Mass Flow Cutoff on volume measurement
Mass Flow Cutoff
does not affect volume measurement. Volume data is calculated from the actual mass data
rather than the reported value.
Volume flow has a separate Volume Flow Cutoff that is not affected by the Mass Flow Cutoff value.
Interaction between Mass Flow Cutoff and mA Output Cutoff
Mass Flow Cutoff
defines the lowest mass flow value that the transmitter will report as measured.
mA
Output Cutoff
defines the lowest flow rate that will be reported via the mA Output. If
mA Output Process
Variable
is set to Mass Flow Rate, the mass flow rate reported via the mA Output is controlled by the higher of
the two cutoff values.
Mass Flow Cutoff
affects all reported values and values used in other transmitter behavior (e.g., events
defined on mass flow).
mA Output Cutoff
affects only mass flow values reported via the mA Output.
Cutoff interaction with mA Output Cutoff lower than Mass Flow Cutoff
Configuration:
•
mA Output Process Variable
: Mass Flow Rate
•
Frequency Output Process Variable
: Mass Flow Rate
•
mA Output Cutoff
:
10
g/sec
•
Mass Flow Cutoff
:
15
g/sec
Result: If the mass flow rate drops below 15 g/sec, mass flow will be reported as 0, and 0 will be used in all
internal processing.
Cutoff interaction with mA Output Cutoff higher than Mass Flow Cutoff
Configuration:
•
mA Output Process Variable
: Mass Flow Rate
•
Frequency Output Process Variable
: Mass Flow Rate
•
mA Output Cutoff
:
15
g/sec
Configure process measurement
Configuration and Use Manual
March 2019
MMI-20025166
36
Micro Motion Model 5700 Transmitters with Configurable Outputs