DFM 6.1 & PDFM 5.1

FIXED OR PORTABLE DOPPLER-EFFECT FLOW METERS FOR PRESSURE PIPE

DFM 6.1

Dedicated instrument for liquids containing solids or air bubbles. Sensor mounted externally on steel, iron, PVC or ABS pipe.

PDFM 5.1

The ideal instrument for evaluating the performance of in-line flow meters. Fast installation, calibration and commissioning makes it ideal as a temporary in-line transmitter.

FEATURES

  • Continuously frequency deviation measurement ensures precise fluid velocity data
  • Can be installed without interrupting plant operation
  • Intuitive programming menu
  • Password protection for totalisation and calibration data
  • Sensor unaffected by dirt or deposits

APPLICATIONS

  • Wastewater
  • Chemicals
  • Sludge
  • Viscous liquids

OPERATING PRINCIPLE

  • 1. Sensor
  • 2. Soundwave transmitted from sensor
  • 3. Soundwave reflected back to sensor
  • 4. Bubbles or solids reflect sound

TECHNICAL SPECIFICATION - DFM 6.1

SPECIFICATION DETAILS
Liquid Characteristics Required suspended solids or air bubbles with minimum cross section of 100 microns, concentration 75 ppm
Piping / DN and Materials ½" to 180" (12.7...4500 mm), Steel, stainless steel, cast iron, ductile iron, concrete-lined ductile iron, PVC, HDPE or any sound-conducting pipe material (Avoid deteriorated coatings that contain air)
Velocity Measurement Range ±0.03 up to 12.2 m/sec
Accuracy ±2% of reading or 0.05 ft/sec (0.015 m/sec). Repeatability ±0.1%, Linearity ±0.5%
Display White, backlit - Display of instantaneous flow rate, totalisation, relay status
Programming 5-digit keypad
Analogue Output 4...20mA opto-isolated (1000 ohm max.)
Control Relay Two SPDT, 5 A programmable for flow alarm and/or pulse output
Power Supply 100...240VAC 50-60Hz (other on request), absorption 5 Watts max.
Enclosure Polyester IP66 NEMA4X. Clear polycarbonate front panel
Operating Temperature -23...60°C (-10...140°F)

SENSOR SPECIFICATIONS

SPECIFICATION DETAILS
Model SE4-A Single-head ultrasonic with 7.6 m cable and SS mounting kit for pipes 1/2" (12.7mm) ID or larger
Certification Class I Division 2, Groups A, B, C, D hazardous locations
Assembly Kit Sensor mounting bracket for pipes with external diameter from 15 to 800 mm, Gel of coupling (150g)
Operating Temperature -40...150°C (-40...300°F)

TECHNICAL SPECIFICATION - PDFM 5.1

SPECIFICATION DETAILS
Flow Rate Range ± 0.46 up to 12.2 m/sec
Pipe Size From 1/2" up to 180" (12.7...4500 mm)
Display White, backlit matrix - displays flow rate, totaliser
Power Input Built-in NiMH battery for up to 18 hours continuous operation, External charger with 100...240VAC 50/60Hz input
Outputs 4...20mA (500 ohm) when AC powered, USB for Data log transfer by direct PC connection
Data Logger Programmable 300000 data point capacity, time and date stamped or formatted flow reports including total, average, minimum, maximum and times of occurrence
PC Software For Windows 98 or higher. Retrieves, displays and saves data log files
Electronics Operating Temperature -23...60°C (-10...140°F)
Electronics Enclosure Portable, ABS enclosure
Carry Case Rated IP67 with protective molded foam insert
Accuracy ±2% of full scale, requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Repeatability: ±0.25%, Linearity: ±0.5%
Calibration Built-in 5-key programming with user-friendly calibration menu. Password protected
Sensitivity Adjustable cut-off, damping: adjustable

SENSOR SPECIFICATIONS

SPECIFICATION DETAILS
Model PSE4 Clamp-on, single-head ultrasonic for pipes ID: 1/2"...180" (12.5 mm...4.5 m) with 3.4 m shielded dual-coaxial cable
Sensor Mounting Kit SS pipe clamp and 5.3 oz. (150 g) silicone coupling compound
Operating Temperature -40...150°C (-40...300°F)