1OMEGA Doppler Ultrasonic Flow Meteroverview

FD-400Series ultrasonic Doppler flowmeter for measuring suspended solids or solids containing acoustic reflectors100A liquid flow of micrometer sized bubbles. These complex instruments can automatically adjust filtering and gain settings to produce reliable readings under a wide range of liquid and reflector conditions.
FD-400Flow meters propagate ultrasonic waves into the flowing liquid through the tube wall or probe tip by using piezoelectric crystals contained in the transducer and probe tip. Then, the sound is reflected by a sound wave reflector suspended in the liquid and recorded by the receiver. If the sound reflector moves within the sound propagation path, the sound waves will be reflected with a frequency shift (Doppler frequency) of the emission frequency. The difference between two frequencies is directly proportional to the velocity of the acoustic reflector, resulting in the conversion of liquid flow velocity into various user-defined units.
FD-400The configuration is completed through the front panel keyboard.2Line backlightLCDDisplay the rate and total number of units selected by the user. The power options include AC and DC. Optional outputs include4arrive20 mARelays and rate pulses.

IISelection of OMEGA Doppler Ultrasonic Flow Meterparameter
Measurement principle:Doppler ultrasound
Flow rate range:0.05to9 mps（0.15to30 fps）
Accuracy:Calibration spacing±2％FS
Liquid type:contain100 ppmThe liquid of useful ultrasonic suspended reflectors is greater than100micron
Monitor
Shell:NEMA 4X（IP66）Polycarbonate, stainless steel, brass, electroplated steel mounting bracket
Size:178 H x 146 W x 99 mm D（7.00 x 5.75 x 3.88“）
Power Supply:115/230 Vac，50/60 Hz± 15％@ 5 VA; 12to28 Vdc @ 2.5 VA
Display:2gox 8characterLCD; LEDBacklight;Top row,7paragraph18Millimeter（0.7“）;Bottom row,14paragraph9 mm（0.35“）; 8Bit rate,8Total number of digits (resettable)
Company:User configured feet, gallons,ft³Mill gallon, meter, liter, millft³，m³Mill, acre, oil barrel（42Gallons, wine barrels（32.5Gallons, pounds, kilograms
Rate:Interval seconds, minutes, hours, days
Accumulator index:E^-2toE⁺⁶
Response time:User selectable,1to60second
Output: 4to20 mA，800Ω;Internal or external power supply; 12bit Resolution;OPTICAL ISOLATION
Dual relays:Independent configuration;form“C”，200 Vac @ 0.5 Aresistance;Rate alarm, accumulator pulse, error
Rate pulse: 2An output type- 500 mVacOr collector switch;2500 Hz; twelvebit Resolution; 500 mV ACto2kΩminute;Collector open circuit sampler1 A，100 V
Multiple instruments:Synchronous provision includes for Domi/Single tube system;many4Miko Interconnection30Rice（100'）
Keyboard:4keys
Operating temperature:Universal,40to85°C（40to185°F）
TRANSD UCERS
Type:Compression mode ultrasound,625 kHz
Shell material:
Standard clamp position:NEMA 6P（IP68），-40to100°C（-40to210°F），CPVC，Ultem ®Nylon,PVC(Cable sheath), aluminum (small tube)
High temperature clamp:NEMA 4（IP65），-40to200°C（-40to400°F），Vespel ®Anodized aluminum, nickel plated brass,PFA(Cable sheath)
Doppler probe:NEMA 6（IP67）-40to100°C（-40to210°F）; 700 psi（48 bar），316 SS，Ultem ®，FKMNylon,PVC(Cable sheath)
Optional elastic armored conduit:Galvanized steel,PVC
Cable length:
Standard length:6Rice（20'）Standard