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Greyline DFM 6.1 Doppler Ultrasonic Flow Meter

Description

The Greyline DFM 6.1 Doppler Ultrasonic Flow Meter is installed without cutting the pipe takes just a few minutes to mount on the of any pipe. outside Configuration is easy with the built-in, 5-button keypad. Select your choice of flow units and enter pipe diameter through the user-friendly calibration menu. Enable password protection to prevent tampering.

The Greyline DFM 6.1 Doppler Ultrasonic Flow Meter  is designed for “difficult liquids” that would damage regular flow meters – wastewater, slurries, sludge, chemicals, viscous liquids, and abrasives. There is no obstruction to flow and no pressure drop.

The Greyline DFM 6.1 Doppler Ultrasonic Flow Meter is a clamp on sensor type flow meter suitable for all pipes 1/2″ (12.5 mm) Inner Diameter or larger. The DFM 6.1 features increased performance in a wide range of applications.
Potential immune filter enhanced industrial noise sources of interference.

Principle of Operation

The Sensor transmits continuous high frequency sound DFM 6.1 through the pipe wall into the flowing liquid. Sound is reflected back to the Sensor from particles or gas bubbles in the liquid. If the liquid is flowing, the reflected sound returns at an altered frequency (the Doppler effect). The continuously Greyline DFM 6.1 Doppler Ultrasonic Flow  measures this frequency shift to accurately measure velocity.

Features :

  • Easy to Install and Configure
  • Enhanced Performance
  • Works on a Large Variety of Pipe Materials and Sizes
  • Non-Contacting Clamp-On Ultrasonic Sensor
  • Isolated 4-20mA Output
  • Large Back-lit Flow Rate Display and Totalizer
  • Optional MODBUS® RTU or HART Output
  • 2 Programmable Control Relays
  • 128MB Data Logger (26 million points)
Greyline DFM 6.1 - Doppler Ultrasonic Flow Meter
Greyline DFM 6.1 – Doppler Ultrasonic Flow Meter

The sensor cable can be extended up to 500 ft. (152 m) with no loss of signal. The standard sensor is rated non-incendive for Class I, Division 2 hazardous locations and the DFM 6.1 can be equipped with optional Intrinsic Safety Barriers for sensor installation in Class I, Division I hazardous locations.

Use the isolated 4-20mA output to transmit flow to remote displays, recorders, or controllers. The programmable relays can be used for flow control, pump protection, or flow proportionate pulse. Calibration is easy with the built-in 5-key calibrator. Display and totalize flow in your choice of engineering units (gallons, liters, etc). A 128MB data logger is standard, capable of capturing up to 26 million data points. Optional MODBUS RTU via HART is available for connection to automation systems.

Benefit

Ideal for “Difficult Liquids”

Greyline Doppler Flow Meters monitor the flow rate of dirty or aerated liquids including: wastewater, sewage, slurries, abrasives, and viscous liquids. Recommended for full pipes and any fluid that contains solids or bubbles.

External Sensor No Contact, No Maintenance

The clamp-on sensor is mounted on the outside of any DFM 6.1 pipe ½ inch / 12.7mm diameter or larger. To measure velocity an acoustic signal is reflected back to the sensor from moving particles or gas bubbles suspended in the fluid. Flow is calculated based on configured pipe ID.

Installation is easy – without shutting down the flow system. No contact is made with the moving fluid and no pipe cutting or drilling is required. There is no fouling or scale build-up on the sensor.

The Doppler Flow Meter includes an ultrasonic sensor, an DFM 6.1 easy to use 5-key calibration system, a large digital flow rate display with totalizer, isolated 4-20mA output, 26 million point data logger, and two programmable control relays. The sensor is classified as non-incendive and an intrinsically safe sensor is optional.

Designed for “difficult” liquids

The Doppler flow meter works best in applications that would defeat regular contacting flow DFM 6.1 meters. Because the Sensor is mounted on the outside of the pipe, it is unaffected by abrasives or harsh fluids. There is no obstruction to flow and no pressure drop.

Enhanced Signal Processing and Industrial Noise Immunity for Reliable Accuracy The Doppler flow algorithm filters out background noise and interference. The high speed digital signal DFM 6.1 processor discriminates against weak and distorted signals for increased reliability and accuracy.

Easy to Install

Each Doppler Flow Meter includes a clamp-on ultrasonic sensor, an DFM 6.1 adjustable stainless steel mounting clamp and sensor coupling compound. The sensor fits on the outside of any pipe diameter ½” (12.7 mm) or larger. It takes just a few minutes to install. There is no need to shut down flow.

Simple, Single-Head Sensor design

Ultrasonic signals are transmitted and received from a single-head sensor. The mounting clamp (included) ensures correct sensor alignment on horizontal or vertical pipes. The automatically self-tunes to the cable length up to 500 ft.(152 m). DFM 6.1

Works on most Pipes

The Greyline Flow Meter measures flow in , carbon steel, stainless DFM 6.1 PVC steel, cast iron, HDPE ductile iron, and concrete lined ductile iron… any pipe material that conducts ultrasound. Doppler signals cannot transmit through pipe walls which contain air pockets (e.g. concrete

Backlit Display with Easy to Use, 5-key Menu System

Configuration is easy with the new user-friendly menu system. Press the DFM 6.1 arrow keys to scroll through menus, change settings and enter calibration values. You can select English, French or Spanish menus, enable a password to protect settings and control brightness of the digital display.

Reverse Flow Measurement

The measures flow in either direction and displays positive or negative DFM 6.1 values. You can control the Totalizer to subtract reverse flow, or to totalize forward flow only. The 4mA setting can also be adjusted to a negative flow setting.

26 Million Point Data Logger

The Doppler Flow Meter comes standard with a built-in 26 million point data DFM 6.1 logger. It includes Windows software to display flow charts and tables, and to create dynamic flow reports. Just plug in a standard flash drive and log files are USB downloaded automatically.

Applications:

  • Recommended for: liquids containing suspended solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm.
  • Pipe Materials: steel, stainless steel, cast iron, ductile iron, concrete lined ductile iron, , PVC HDPE, or any contiguous pipe material that conducts sound, including lined pipes with liner bonded to pipe wall. Avoid pipes with loose insertion liners and pipe walls which contain air

Specification

  • Flow Rate Range: ± 0.1 ± 0.03 to 40 ft/sec ( to 12.2 m/sec) in most applications
  • Pipe Size: Any pipe from ½” to 180″ (12.7 mm to 4.5 m) ID
  • Accuracy: ±2% of reading or 0.1 ft/sec (0.03 m/sec) whichever is greater. Requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Repeatability: ±0.1%,
  • Linearity ±0.5%
  • Display: White, backlit matrix – displays flow rate, relay states, 16-digit totalizer, operating mode and calibration menu
  • Configuration: built-in 5-button keypad with English, French or Spanish language selection
  • Power Input: 100-240 50-60Hz 10VA maximum. Optional: 9-32VDC, 10 Watts maximum VAC
  • Output: Isolated 4-20mA (1000 ohm load max.) or 0-5VDC (Field Selectable)
  • Control Relays: Qty 2, rated 5 amp , programmable flow alarm and/or proportional pulse SPDT
  • Data Logger: Built-in 26 million point logger with output and Windows™ software USB
  • Enclosure: watertight, dust tight 4X ( 66) with a clear face NEMA IP polyester polycarbonate
  • Electronics Operating Temperature: -10° to 140°F (-23° to 60°C)
  • Shipping Weight: 14 lbs (6.3 kg)
  • Approvals: CE, CSA/UL/EN 61010-1
  • Model 4 SE single-head ultrasonic with 25 ft (7.6 m) shielded cable and stainless steel mounting kit for pipes ½” (12.7 mm) or larger. Designed to withstand accidental submersion ID to 10 psi.
  • Certified non-incendive for Class I Division 2, Groups A,B,C,D hazardous locations
  • Sensor Operating Temperature: -40° to 300°F (-40° to 5 °C) 1 0
  • Exposed Materials: 316SS

More Information: DFM 6.1 Brochure

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Rudy Wiratama

rudywinoto.com/wmablog.com/flowmasonic.com

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