Configure Flow Rate Switch - Emerson Micro Motion 4200 Configuration And Use Manual

Configure advanced options for process measurement
April 2019
3. Set Two-Phase Flow Timeout to the number of seconds that the transmitter will wait for a two-phase
flow condition to clear before posting the alert.
• Default: 0 seconds, meaning that the alert will be posted immediately
• Range: 0 to 60 seconds
6.1.2 Detect two-phase flow using sensor diagnostics
Display Menu > Configuration > Inputs/Outputs > Channel x > I/O Settings > Source
ProLink III Device Tools > Configuration > I/O > Outputs > mA Output x
Configure > Manual Setup > Inputs/Outputs > Channel x > mA Output x > mAOxSource
Field Communicator
The transmitter always monitors sensor diagnostics and applies a two-phase flow algorithm. You can assign
an mA Output to report the results of this calculation: single-phase flow, moderate two-phase flow, or severe
two-phase flow.
Procedure
Set mA Output Source to Two-Phase Flow Detection.
The signal from the mA output indicates the current state of the process:
• 12 mA: Single-phase flow
• 16 mA: Moderate two-phase flow
• 20 mA: Severe two-phase flow

6.2 Configure Flow Rate Switch

Menu > Configuration > Alert Setup > Enhanced Events > Flow Rate Switch
Display
ProLink III Device Tools > Configuration > I/O > Outputs > Discrete Output > Source > Flow Switch Indication
Field Communicator Configure > Manual Setup > Inputs/Outputs > Channel x > Discrete Output x > Flow Switch
Flow Rate Switch is used to indicate that the flow rate has moved past a user-specified setpoint, in either
direction. The flow rate switch is implemented with a user-configurable hysteresis.
Typically, a Discrete Output is assigned as the flow rate switch indicator. The Discrete Output can be wired to
an external device such as a light or a horn.
Prerequisites
A channel must be configured as a Discrete Output, and the Discrete Output must be available for this use.
Procedure
1. Set Discrete Output Source to Flow Switch, if you have not already done so.
2. Set Flow Switch Variable to the flow variable that you want to use to control the flow rate switch.
3. Set Flow Switch Setpoint to the value at which the flow switch will be triggered (after Hysteresis is
applied).
• If the flow rate is below this value, the Discrete Output is ON.
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Configuration and Use Manual
MMI-20048166
Micro Motion 4200 Transmitters