Doppler Ultrasonic Flow Meters   Overview Series DFX Ultrasonic Doppler Flow Meters measure the flow of liquids that contain sound reflectors - suspended solids or gas bubbles – greater than 35 micron size. The DFX software automatically adjusts filtering parameters and gain settings so that reliable readings are ensured over a wide range of liquid and reflector conditions. DFX is housed in a NEMA 4X (IP-66) enclosure and is configured by the user via the front panel keypad. A two-line backlit LCD displays rate and accumulated flow values in user selected measuring units. Power supply options include AC or DC operation and output options include 4-20mA, rate pulse and dual relay. Two transducer types are available with the DFX meter. Series DT9 clamp-on, non-intrusive transducer is recommended for use on most pipes constructed from metal or plastic. The DT9 is rated to NEMA 6P (IP-68) and has the ability to work with temperatures up to +400 °F (+200 °C). Series DP7 insertion probe transducer is available for installations on pipe systems that do not permit ultrasound penetration. The DP7 inserts into the pipe wall and directly contacts the flowing liquid. Both transducer types can be located up to 990 feet (300 meters) from the DFX display enclosure utilizing RG59 coaxial cable.       Technical Specification   GENERAL Measuring Principle Doppler Ultrasonic Flow Velocity Range 0.15-30 FPS (0.05-9 MPS) Accuracy ±2% full scale, over calibrated span Liquid Types Liquids containing 100 ppm of useful sonic suspended reflectors greater than 35 micron size, and at least 25% of the overall particle volume is larger than 100 microns (See “Product Applications” page for details) MONITOR Enclosure NEMA 4X (IP-66), polycarbonate, stainless steel, brass, plated-steel mounting brackets 7.00H x 5.75W x 3.88D inches (178H x 146W x 99D mm) Power Supply 115/230 VAC 50/60 Hz ±15% @ 5 VA Max; 12-28 VDC @ 2.5 VA Max Display 2 line x 8 character LCD; LED backlighting; Top row 7-segment 0.7 inch (18 mm); Bottom row 14-segment 0.35 inch (9 mm); 8-digit rate 8-digit total (resettable) Units User configured - feet, gallons, ft3, Mil-gal, meters, liters, Mil ft3, m3, Mil-liters, acre-feet, oil barrels (42 gallon), liquor barrels (32.5 gallons), lbs., Kg Rate Interval Second, minute, hour, day. Totalizer exponent: E-2 to E+6 Response Time User selectable: 1-60 seconds Outputs 4-20mA: 800 Ohms max; internal or external power supply; 12-bit resolution; optically isolated Dual Relay: independently configured; Form C, 200 VAC @ 0.5 A resistive; rate alarm, totalizer pulse, error Rate Pulse: two output types—500mV AC or open collector; 2,500 Hz max; 12-bit resolution; 500 mV AC into 2k Ohm minimum; Open collector 1 A at 100 V max Multiple Meters Synchronization provision included—utilized for multiple meter/single pipe system. Up to four meters may be interconnected, up to 100 feet (30 meters) apart. Keypad Four keys, tactile Operating Ratings General Purpose; -40 ºF to +185 ºF (-40 °C to +85 °C) TRANSDUCERS Type Compression-mode Ultrasonic; 625 kHz Housing Material Standard Clamp-On: NEMA 6P (IP- 68) -40 °F to +210 °F (-40 °C to +100 °C) CPVC, Ultem®, Nylon, PVC (Cable Jacket), Aluminum (small pipe) High Temp Clamp-On: NEMA 4 (IP- 65) -40 °F to +400 °F (-40 °C to +200 °C) Vespel®, Anodized Aluminum, Nickel-plated brass, Teflon® (Cable Jacket) Doppler Probe: NEMA 6 (IP-67) -40 °F to +210 °F (-40 °C to +100 °C); 700 PSI (48 Bar) Max. 316 Stainless Steel, Ultem®, Viton®, Nylon, PVC (Cable Jacket) Optional Flexible Armored Conduit: Zinc-plated steel, PVC Pipe Sizes Standard Clamp-On Transducers: 1 inch (25 mm) and above Small Pipe Clamp-On Transducers: 1/4 to 1 inch (6 to 25 mm) Probe Transducers: 4 to 120 inch (101 to 3050 mm) Cable Length Standard Lengths: 20, 50 and 100 Feet (6, 15, 30 m) Optional Lengths: to 990 Feet (300 m) Installation General purpose