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Technical Specifications
| Linearity | 0.5% |
| Repeatability | 0.2% |
| Accuracy | 土1% of reading at rates>0.2 mps |
| Response Time | 0.999 seconds, user.configurable |
| Velocity | 士32 m/s |
| Pipe Size | 20mm.6000mm |
| Rate Units | Meter, Feet, Cubic Meter, Liter, Cubic Feet, USA Gallon, lmperial Gallon, Oil Barrel, USA Liquid Barrel, lmperial Liquid Barrel, Million USA Gallons. User configurable. |
| Totalizer | 7.digit totals for net, positive and negative flow respectively |
| Liquid Types | Virtually all liquids |
| Security | Setup values Modification LockoutAccess code needs unlocking |
| Display | 4x8 Chinese characters or 4x16 English letters |
| Communication lnterface | RS-232C, baud.rate: from 75 to 57600. Protocol made by the manufacturer and compatible with that of the FUJl ultrasonic flow meter. User protocols can be made on enquiry. |
| Transducers | Model M2 for standard, other 4 models for optional |
| Transducer Cord Length | Standard 2x5 meters, optional 2x10 meters/2x15meters |
| Power Supply | 3 AAA Ni.H built.in batteries. when fully recharged it will last over l0 hours of operation. 100V.240VAC for the charger |
| Data Logger | Built.in data logger can store over 2000 lines of data |
| Manual Totalizer | 7-digit press-key-to-go totalizer for calibration |
| Housing Material | ABS |
| Case Size | 100x66x20mm |
| Handset weight | 514g (1.2 lbs) with batteries |
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Applications
The FK-2100H Series Ultrasonic Flow Meter is widely used in:
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Industrial process flow measurement
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Water supply and wastewater systems
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Petroleum and chemical industries
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Power plants and energy systems
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HVAC and utility monitoring
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Flow surveys, troubleshooting, and temporary measurement tasks
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Measuring principle
The FK-2100H ultrasonic flow meter measures liquid flow velocity in a closed conduit using the transit-time difference method. The clamp-on ultrasonic transducers are mounted externally on the pipe, providing a non-intrusive, non-fouling, and easy-to-install measurement solution.
Two transducers alternately transmit and receive frequency-modulated ultrasonic pulses. When the sound signal travels with the flow, the transit time is shorter; when traveling against the flow, the transit time is longer. The difference between these two transit times is directly proportional to the fluid velocity.
Depending on pipe diameter and fluid characteristics, the transducers can be installed using different mounting methods:
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V-method: Sound traverses the pipe twice
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W-method: Sound traverses the pipe four times
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Z-method: Transducers mounted on opposite sides, sound traverses once
The flow velocity is calculated based on the following relationship:
ΔT = Tup − Tdown
Where:
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θ – Included angle to the flow direction
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M – Number of ultrasonic beam traverses
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D – Pipe diameter
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Tup – Transit time from upstream to downstream
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Tdown – Transit time from downstream to upstream
Using this principle, the FK-2100H accurately calculates instantaneous flow rate and accumulated flow.
