It's ideal for flow troubleshooting, balancing and checking performance of permanent flow meters. The new PDFM 5.0 is fast and easy to operate – you can mount the sensor on the outside of a pipe in less than a minute. Use the built-in keypad and calibration menu to set up the flowmeter for your application. The PDFM 5.0 works on any liquid containing bubbles or solids and is recommended for 'difficult liquids' like wastewater, slurries, sludge, chemicals, viscous liquids and abrasives. Measures flow through most metal and plastic pipes including PVC, ductile iron, carbon steel and stainless steel.
The Greyline PDFM 5.0 is AC/DC powered with built-in NiMH batteries and external charger. With its 4-20mA output you can use the PDFM 5.0 as a spare transmitter in critical applications. For flow studies and troubleshooting use the built-in 300,000 point Data Logger. Retrieve data logs with 'Greyline Logger' software – included free with each PDFM 5.0. Connect the USB output directly to your PC or Laptop to download data logger files.
The PDFM 5.0 includes a non-intrusive Doppler ultrasonic sensor for pipes from 1/2' to 180' (12.5 mm to 4.5 m) diameter, a stainless steel sensor mounting bracket and clamps, coupling compound and AC charger with a rugged IP67 carry case. It operates up to 18 hours from internal batteries and recharges overnight.
Start-up of a PDFM 5.0 Portable Doppler Flow Meter
It's easy to mount the clamp-on ultrasonic sensor and start-up the PDFM 5.0 to measure flow in pipes 1/2' diameter or larger.
Quick, Easy Flow Measurements from Outside a Pipe
Each Greyline PDFM 5.0 comes complete with rugged watertight strap-on sensor and stainless steel mounting kit. Use the simple 5-key menu system to select units of measurement and to calibrate to any pipe diameter ½” (12.5 mm) or larger.
Simple start-up and Calibration
Sensor mounting and a full calibration can be done in just a few minutes. It is fast and easy! Put coupling compound gel (included) on the sensor face and mount the sensor on the outside of a pipe with the stainless steel mounting bracket (supplied). Use the five-key calibration system to enter pipe diameter and to select your choice of engineering units (gallons, litres etc.) The PDFM 5.0 will immediately begin to display, transmit and totalize.
No Calculations - No Programming Codes
Select your choice of display units: the PDFM 5.0 will display and totalize flow volume in gallons, liters, cubic feet or cubic meters. If you change from one measurement system to another, the PDFM 5.0 will automatically and instantly calculate and convert the flow display and totalizer. Calibrate to the pipe size using the keypad to enter inside diameter.
Built-in 300,000 point Datalogger and PC Software
Set up the PDFM 5.0's data logger to store time and datestamped flow values from 10 second to 5 minute intervals. Or use the convenient 'Flow Report' format where total, minimum, maximum and average flow rates are stored in your choice of hourly or daily summaries. Transfer flow logs to your PC or laptop through the PDFM 5.0's USB output. Greyline Logger software (included) displays data in both graph and table formats and exports to graphic or text file formats for use in other programs.
“Sleep Mode” for Extended Data Logging on Battery Power
Sleep mode extends battery life for long-term data logging at locations where AC power input is not available. Between logging intervals the flowmeter drops into a stand-by mode until a flow reading is requested by the data logger. Flow rates are sampled continuously for 10 seconds and then the PDFM 5.0 returns to sleep until the next logger point is required. With 5 minute sample intervals the PDFM can data log for about 18 days on battery power.
New Signal Processing for reliable Accuracy
The PDFM 5.0 Doppler flow algorithm filters out background noise and interference. The digital signal processor discriminates against weak and distorted signals. When the processor cannot measure accurately the meter will display zero flow and indicate low signal confidence.
Battery Powered for a Full Day’s Work
With its built-in NiMH rechargeable battery, you can operate the PDFM 5.0 up to 18 hours continuously. Display brightness is adjustable to conserve power. Plug into an AC outlet (100-240VAC 50/60Hz) to activate the 4-20mA output and to recharge fully in 6 to 8 hours. You can continue to use the PDFM 5.0 while charging.
The PDFM 5.0 works best with difficult liquids in applications that would damage regular flow meters. Because the sensor is mounted on the outside of the pipe, there is no contact with the moving fluid.
The ultrasonic sensor straps onto the outside of pipes ½' (12.5 mm) ID or larger and measures flow in common pipe materials: PVC, carbon steel, stainless steel, cast iron, fiberglass, and lined pipes...any pipe that conducts ultrasound. Doppler signals cannot be transmitted through pipe walls which contain air pockets (materials like concrete and wood), or loose insertion liners (with an air gap between the liner and pipe wall). Because the sensor is so easy to install you can test any application and pipe material in a few minutes.
The PDFM 5.0 ultrasonic sensor injects high frequency sound through the pipe wall and into the flowing liquid. Gas bubbles or solids suspended in the liquid reflect the ultrasonic signal back to the sensor. When this sound is reflected from moving bubbles or particles it is returned to the sensor at an altered frequency. This frequency shift is called the Doppler effect. The PDFM 5.0 continuously measures the change from it's transmitted frequency to the received frequency to accurately calculate flow.
Scope: This specification covers a portable, ultrasonic Doppler-type flow meter as manufactured by Greyline Instruments, Massena, New York / Long Sault, Ontario. This instrument shall provide for non-intrusive flow measurement, indication, totalizing, transmitting and data logging of the flow rate in a full pipe.
Each portable Doppler flow meter shall have the following design features and engineering specifications:
Optional Features For Insertion In Specification As Required:
The instrument shall be a Model PDFM 5.0 Portable Doppler Flow Meter as manufactured by Greyline Instruments Inc., and warranted against defects in materials and workmanship for one year.