Emerson Daniel 3415

If an input is fixed, then its value is specified via a data point (SpecFlowPressure,
SpecFlowTemperature).
Alarm limits can be specified for each input (LowPressureAlarm, HighPressureAlarm,
LowTemperatureAlarm, HighTemperatureAlarm). Additionally, the flow-condition
pressure is configurable to be gage or absolute (via the InputPressureUnit data point). If
the pressure is gage, then the atmospheric pressure must be specified (via the
AtmosphericPress data point). See and for details on configuring the flow-condition
pressure and temperature.
Another data point (FlowPOrTSrcUponAlarm), common to both pressure and
temperature, is used to specify the data source to use when the selected input data is
invalid (i.e., value at or outside its alarm limits or a live input in calibration) as either:
• Last good value (0), or
• Fixed value (1).
This data point (FlowPOrTSrcUponAlarm) is not configurable via the Daniel MeterLink Field
Setup Wizard; however, it is configurable via the Daniel MeterLink Tools|Edit/Compare
Configuration screen. The default is to use the last good value.
Data updates
The Daniel 3410 Series Gas Ultrasonic Flow Meter samples the input analog signal(s) and
updates the corresponding data point(s) (LiveFlowPressure, LiveFlowTemperature) once
per second regardless of the input selection (disabled, live, or fixed).
Every five seconds, the meter updates the "in-use" flow-condition pressure and
temperature values (FlowPressure, AbsFlowPressure, FlowTemperature) depending upon
the input selection, validity of the input data, and the selected data source upon alarm
according to .
Flow-condition pressure and temperature data sourceTable 5-7:
Input Type
(EnablePressureInput
or EnableTempera-
tureinput)
Data Validity
(PressureValidity or
TemperatureValidi-
ty)
Data Source Upon
Alarm
(FloePOrtSrcUpo-
nAlarm)
"In-Use" Data Source
(FlowPressure or Flow-
Temperature)
Disabled N/A N/A "In-Use" value unchanged
Live Valid N/A Average of live values
(LiveFlowPressure or
FlowTemperature)
Invalid* Last good value "In-Use" value unchanged
Fixed Fixed data point (Spec-
FlowPressure or Spec-
FlowTemperature)
Valid N/A Fixed data point (Spec-
FlowPressure or Spec-
FlowTemperature)
Invalid Last good value "In-Use" value changed
Configurations
64 3410 Series Gas Ultrasonic Flow meters