PORTABLE DOPPLER FLOW METER SPECIFICATIONS
SCOPE: This specification covers a portable, ultrasonic Doppler-type flow meter as manufactured by Greyline Instruments, Largo, Florida / 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:
A. PERFORMANCE SPECIFICATIONS
- Measure forward and reverse flow ± 0.1 to 40 ft/sec (± 0.03 to 12.2 m/sec).
- Have an accuracy of ±2% of full scale on most wastewater applications. Have linearity of ±0.5% and repeatability of ±0.25%.
- Operate on liquids with entrained particles or gases of 100 microns or larger and minimum concentrations of 75 ppm.
- Operate from the outside of common pipe materials including: carbon steel, stainless steel, ductile iron, copper, PVC, FRP, ABS and other selected engineering materials.
- Operate on AC/DC power.
- Have a single-head, clamp-on transducer with twin piezo-electric ceramic transmit and receive crystals encapsulated in epoxy resin and a stainless steel housing.
- The transducer shall be solid state and transformer isolated, and operate at 640KHz.
- The transducer shall be waterproof and operate at temperatures from -40°F to 300°F (-40°C to 150°C), and withstand accidental submersion to 10 psi.
- The transducer shall be designed to install on pipes with inside diameter ranging from 1/2" to 180" (12.5 mm to 4.5 m).
- Have a 12 ft (3.6 m) long flexible, shielded coaxial pair cable extending from the transducer to the electronics.
- Shall include Manufacturer's recommended sensor coupling compound and adjustable stainless steel sensor mounting clamp.
- Have a portable ABS electronics enclosure with a padded, watertight IP67 carrying case. Total weight shall be less than 14 lbs (6.5 kg).
- Electronics shall be designed for continuous operation at temperatures from -10° to 140°F (-23° to 60°C).
- Have a built-in 5-key calibration keypad with operator selection of parameters through visual prompts from a menu calibration system. Systems requiring calibration by Parameter codes or external calibrators shall not be accepted.
- Have user-selectable menu languages including English, French and Spanish.
- Have a white, backlit matrix display indicating flow in user-selected engineering units, totalized flow, units of calibration, and signal strength.
- Have display backlight brightness adjustment for reduced power consumption.
- Have flow proportional 4-20mA output rated to maximum resistive load of 500 ohms.
- Have a built-in 300,000 point data logger, USB output and connecting cables. Data logger shall support time and date-stamped logging and generate formatted flow reports including total, average, minimum, maximum and times of occurrence.
- Include Windows software for data log retrieval, graphing and export.
- Have automatic signal strength and signal confidence monitoring.
- Have keypad adjustable signal cutoff to reduce interference.
- Shall include an external charger with 100-240VAC 50/60Hz input.
- Shall include an internal NiMH rechargeable battery with minimum capacity for 18 hours continuous battery operation.
- Have a battery status indicator with automatic low battery shut off and battery overcharge protection.
- Have user-selectable "sleep mode" synchronized to data logger sample rate for reduced battery power consumption.
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Võ Văn Biên (Mr.) 0911 499 498 | Phạm Mạnh Tiến (Mr.) 0918 979 498