PORTABLE DOPPLER FLOW METER SPECIFICATIONS
SCOPE: This specification covers a portable, ultrasonic
Doppler-type flow meter as manufactured by Greyline Instruments,
Massena, New York / 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
- Operate on liquids with entrained particles or gases of
100 microns or larger and minimum concentrations of 75
- 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
- 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
- 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
- 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
- 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
- Have flow proportional 4-20mA output rated to maximum
resistive load of 500 ohms.
- Have a built-in 300,000 point data logger,
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
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.
D. OPTIONAL FEATURES FOR INSERTION IN SPECIFICATION AS
- Include additional 150 g. manufacturer's recommended
ultrasonic sensor coupling compound.
- Include 50 ft (15 m) length Sensor Cable extension
complete with connecting plugs.
The instrument shall be a Model
PDFM 5.1 Portable Doppler Flow
Meter as manufactured by Greyline Instruments Inc., and warranted
against defects in materials and workmanship for one year.