Emerson Micro Motion RFT9739 Flow Transmitter Unit

Module Feature

RFT9739 is legacy model of Emerson Micro Motion Coriolis transmitter platform. Two mechanical configurations are available: 19-inch DIN rack mount for control room cabinet and field wall/pole mount for field installation. It supports mass flow, volumetric flow, fluid density and process temperature calculation from Coriolis sensor signals. It provides 4-20mA analog output, pulse output for totalizer, HART and Modbus RS485 digital communication. It has onboard batch control, low flow cut-off, damping setting and comprehensive device diagnostics. Widely matched with CMF, F series Coriolis sensors, used for oil, chemical and food process metering. This model has been superseded by newer transmitter series.

Working principle

The transmitter receives coil drive signal and pickoff vibration signal from Coriolis sensor. Internal CPU calculates tube phase shift, resonant frequency and temperature value, then converts these values into mass flow and density. Standard 4-20mA analog signal and superimposed HART digital signal are sent to DCS system, pulse signal can drive external totalizer. It continuously monitors coil resistance, drive amplitude and signal balance, stores fault and event logs.

Onboard components

Main control PCB, signal drive and conditioning circuit, power supply unit, communication interface chip, terminal block assembly, status LED array, metal housing.

LED indicators

Power LED, Run LED, Fault LED.

Hardware self-diagnosis

Coil open/short detection, drive amplitude monitoring, signal imbalance diagnosis, over-temperature detection, power supply monitoring, memory checksum test.

Programming software

Emerson ProLink, AMS Device Manager, used for flow range setup, batch configuration, sensor trim and firmware maintenance.

Electrical & Process Parameters

Model:RFT9739 Brand:Emerson Micro Motion Device type:Coriolis Mass Flow Transmitter Power supply:110/230VAC or 24VDC Output:4-20mA, pulse Communication:HART 7, Modbus RS485 Function:Mass flow, density, temperature measurement, batch control

Mechanical & Structure

Mounting:19 inch rack mount / field pole/wall mount Protection class:IP20 (rack), IP66 (field) Housing:Metal enclosure

Environmental

Operating temperature:0℃ ~ +50℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non-condensing Certification:UL, FM, ATEX compliant Status: Micro Motion legacy Coriolis transmitter

Installation

Cut off power before operation. Install RFT9739 transmitter in cabinet or field mounting bracket. Connect sensor cable, power cable and signal wiring. Configure sensor calibration factors and process parameters, perform zero calibration and test run.

Interface

Sensor signal terminals, 4-20mA output terminals, pulse output terminals, power terminals, RS485 communication port.

Diagnostic

Fault alarm: sensor coil failure, broken sensor cable. Unstable reading: two-phase flow or tube fouling. Communication no response: wrong wiring or protocol mismatch.

Product Brief

Emerson Micro Motion RFT9739 legacy Coriolis mass flow transmitter, rack or field mount, HART / Modbus, matched with CMF/F series sensors for process flow and density measurement.