MFT two-wire flow transmitter and display (photo)MEMFlo Two-Wire Flow Transmitter (MFT)

Typical Flow Applications:

Features & Benefits:

Description

The MEMFlo Flow Transmitter (MFT) is a state-of-the-art, microprocessor based two-wire transmitter with 4-20mA/ 0-5Vdc output, digital flow rate and total flow display. It combines our time-proven variable area technology with a high tech processor and solid state circuitry.

The MEMFlo Flow Transmitter (MFT) is sealed against industrial contamination by a NEMA 4, 12,13 (IP 57/52/54) rated enclosure and is available for either liquid, gas or steam service.

The MFT is capable of calculating and displaying both flow rate and total accumulated flow. The flow rate and total flow can be displayed in any of the user selectable measurement units. The monitor’s large 8 digit numeric LCD makes extended range viewing practical. The second 8 character alphanumeric display provides for selectable units viewing in RUN mode and prompts for variables in PROGRAM mode.

All MFT’s come pre-calibrated from the factory. However, the unit may be adjusted by the user to meet specific system requirements. Calibration parameters are included for:

All meters include an analog output that can be configured for 0-5 Vdc, 0-10 Vdc, or 4-20 mA current loop.

Installation

The MFT installation takes only a few minutes. The MFT is designed to slip over any standard sight tube by sliding the sight tube through the mounting rings on the MFT. A locking nut is tightened to secure the MFT onto the sight tube. The transmitter display can be rotated 360° to assure correct viewing.

Operation

The MFT transmitter has two modes of operation. In the run mode the transmitter will display flow rate, total flow, or toggle back and forth between the two as defined by the display configuration. The programming mode allows the user to change the configuration and adjust the calibration of the meter.

SPECIFICATIONS
Enclosure Rating

  • NEMA 12 & 13 (equivalent to IP 52/54)

Operating Temperature

  • Fluid: -20°F to 240°F (-29°C to 116°C)
  • Ambient: -20°F to 158°F (-29°C to 70°C)

Environmental

  • Humidity: 0-90% non-condensing

Pressure

  • Dependent on the individual flow meter model. Please refer to the MEMFlo meter specifications.

Accuracy

  • ± 2% of full scale

Repeatability

  • ±0/5%

Pressure Drop

  • See MEMFlo meter specifications for meter drop.

Electrical

  • Power Requirement:
    • 0.5 Vdc Output 10-30 Vdc @ 0.75 maximum
    • 0-10 Vdc Output 12-30 Vdc @ 0.75 maximum
    • 4-20 mA Output loop-powered, 30 Vdc maximum
  • Power Consumption:
    • 25 mA maximum

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Analog Outputs:

  • 0-5 Vdc and 0-10 Vdc into 10,000 Ohms minimum
  • 4-20 mA into 1000 Ohms maximum

Circuit Protection:

  • Reverse polarity and current limiting

Transmission Distance

  • 4-20 mA limited by cable resistance
  • 0-5 Vdc 1000 feet (300 m) maximum
  • 0-10 Vdc 1000 feet (300 m) maximum

Isolation

  • Inherently isolated from the piping system

Rate and Totalization Display

  • Fixed or toggle modes of operation for rate and totalizer display
  • 8 digit, .70” high numeric display for rate and total
  • 8 digit, .35” high alphanumeric display for units and setup

Temperature Drift

  • 50 ppm/ °C (Max)

Analog Output

  • Resolution -1:4000

Transient Over-Voltages:

  • Category 3, in accordance with IEC 664