Omega Products FDT-21 User Manual

HANDHELD ULTRASONIC FLOWMETER

For Clean Liquids

FDT-21

U Accuracy 1% U Repeatability 0.2% U Positive, Negative and Net Totalizer U 4-Line LCD Display U Clamp On Transducers U RS232 Output

FDT-21 ultrasonic ﬂowmeter is designed to measure the ﬂuid velocity of liquid in a full/closed pipe. It is a handheld measurement system which is both easy to install and use. The FDT-21 operates according to the difference in the transit time of ﬂight measured, and determines the ﬂow velocity by measuring the travel time of a pulse from one transducer to the next. Flow in the same direction takes less time to travel to the second transducer than does ﬂow in the opposite direction. Electroacoustic transducers receive and emit brief ultrasonic pulses through the liquid of the pipe. Transducers are vertically placed at both sides of the measured pipe. Sensors are placed on the pipe and fastened by means of a clamp. The display will quickly show the ﬂow velocity. The FDT-21 can be used for metallic, plastic and rubber tubes.

SPECIFICATIONS

Accuracy: ±1% of reading >(0.2m/s) 0.6 ft/s Repeatability: 0.2% Linearity: 0.5% Response Time: 0 to 999 seconds (user conﬁgured) Velocity: (±0.01 to 30 m/s) ±0.03 to 105 ft/s bi-directional Temperature Range:

Standard: 0 to 70ºC (32 to 158ºF) With High Temp Transducers: 0 to 160ºC (32 to 320ºF) Pipe Size: DN 20 to 100 mm (0.75 to 4") standard [up to DN 6000 mm (236") with optional transducers]

Transducer Frequency: 1 MHz Rate Units (User Conﬁgured): Meter, feet, cubic meter,

cubic feet, USA gallon, oil barrel, USA liquid barrel, imperial liquid barrel, million USA gallons Totalizer: 7-digit totals for positive, negative and net ﬂow Liquid Types: Most liquids including clean water, sea water, waste water, chemical liquids, oil, crude oil, alcohol, beer, and more Suspension Concentration: ≤20,000 ppm (may contain very small amounts of air bubbles)

Pipe Material: All metals, most plastics and ﬁberglass Security: Programmable lock-out code Display: 4 x 16 english letters Communications: RS232C (baud rate from

75 to 115,200 bps)

Transducer Cable Length: 5 m (15')

Power: 3 “AAA” Ni-H built-in batteries (included) with 90 to

230 Vac charger, fully charged lasts over 12 hrs. Data Logger: Built-in, stores over 2000 lines of data Totalizer/Calibration: 7-digit press-to-go for calibration Housing: ABS plastic with aluminum alloy protective carrying case

Case: NEMA-4 (IP65) Dimensions: 100 H x 66 W x 20 mm D (3.9 x 2.6 x 0.8") Weight: 514 g (1.2 lb)

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All accessories shown smaller than actual size.

FDT-21, comes complete with 3 “AAA” batteries, small pipe standard and high temperature transducers (S1 and S1H), acoustic gel, tape measure, plug-in charger, RS232 cable, transducer cable, rugged carrying case and operator’s manual, shown smaller than actual size.

FDT-21-M2, medium pipe, standard transducer

Parameters HS-Type HM-Type S1-Type M2-Type L2-Type S1H-Type M2H-Type

Pipe Size (mm)

20 to 100DN 50 to 100DN 20 to 100DN 50 to 700DN 300 to 6000DN 20 to 100DN 50 to 700DN

FDT-21-S1H, replacement small pipe, high-temperature transducer

FDT-21-M2H, medium pipe, high-temperature transducer

FDT-21-HM, medium pipe, aluminum transducer

Pipe Size (inch) ³⁄₄ to 4 2 to 28 ³⁄₄ to 4 2 to 28 12 to 240 ³⁄₄ to 4 2 to 28 Material

Aluminum Alloy ABS Alloy Special

High-Temperature Materials

Frequency Calibration Magnetism Temperature Protection Class

Dimensions (mm) 200 x 25 x 25 280 x 40 x 40 45 x 30 x 30

1 MHz

Calibrate with the main unit Magnetic Non-magnetic Magnetic

0 to 70°C (32 to 158°F) 0 to 160°C (32 to 320°F)

NEMA 4 (IP65)

71 x 37 x 40

88 x 44 x 50 90 x 85 x 24 71 x 37 x 40

Weight g (oz) 250 (8.8) 1080 (38) 75 (2.6) 259 (9.1) 262 (9.2) 94 (3.3) 259 (9.1) Liquid Types

Fresh water, salt water, chemical liquids, oil, crude oil, alcohol, beer, etc.

Suspension

Concentration Pipe Material

≤20000 ppm, may contain very small amount of air bubbles

All metals, most plastics, fiberglass, etc.

Dedicated

Shielded

Transducer Cable

Standard length 5 meter x 2, can be extended to 10 meter x 2 or 15 meter x 2

To Order Visit omega.com/fdt21 for Pricing and Details

Model No. Description

FDT-21 Handheld transit-time ultrasonic flowmeter (includes S1 and S1H transducers)

Comes complete with 3 “AAA” batteries, small pipe standard and high temperature transducers (S1 and S1H), acoustic gel, tape measure, plug-in charger, RS232 cable, transducer cable, rugged carrying case and operator’s manual.

Accessories

Model No. Description Weight g (oz) Pipe Size mm (inch)

FDT-21-S1 Replacement small pipe standard transducer 75 (2.65) 20 to 100 (0.75 to 4) FDT-21-S1H Replacement small pipe high temp transducer 94 (3.32) 20 to 100 (0.75 to 4) FDT-21-HS Small pipe aluminum transducer 250 (8.82) 20 to 100 (0.75 to 4) FDT-21-HM Medium pipe aluminum transducer 1080 (38.09) 50 to 700 (2 to 28) FDT-21-M2 Medium pipe standard transducer 259 (9.1) 50 to 700 (2 to 28) FDT-21-M2H Medium pipe high temp transducer 259 (9.1) 50 to 700 (2 to 28) FDT-21-L2 Large pipe standard transducer 262 (9.2) 300 to 6000 (12 to 236)

FDT-21-GREASE-S1 Acoustic gel for standard transducers FDT-21-GREASE-S1H Acoustic gel for high-temperature transducers

Ordering Example: FDT-21, handheld transit-time ultrasonic flowmeter.

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