| PORTABLE ULTRASONIC FLOW
METER SPECIFICATIONS
SCOPE: This specification
covers a portable, ultrasonic Transit Time flow meter
by Greyline Instruments, Massena, New York / Long Sault,
Ontario. This portable instrument shall provide for non-intrusive
flow measurement, indication, totalizing and transmitting
of the flow rate in a full pipe.
GENERAL:
Each portable Transit Time
flow meter shall have the following design features and
engineering specifications:
A. PERFORMANCE SPECIFICATIONS
- Have an accuracy of
±2% of reading in most clean fluid applications. Have
repeatability of ±0.5%.
- Operate on clean liquids
in full pipes with less than 2% solids or gas bubbles.
- Operate on any sonic
conducting pipe material such as carbon steel, stainless
steel, galvanized steel, mild steel, copper, UPVC, PVDF,
glass, brass and including pipes with bonded liners
of epoxy, rubber or cement.
- Operate on AC/DC power.
Include an internal NiMH rechargeable battery with capacity
for 16 hours continuous battery operation. Recharge
and operate with power input of 100-260VAC 50-60Hz.
B. ULTRASONIC TRANSDUCERS
- Have a dual 2 MHz transmitting/receiving,
clamp-on transducers.
- The transducers shall
be waterproof and operate continuously at temperatures
from -4°F to 275°F (-20°C to 135°C).
- The transducers shall
be designed to install on pipes with inside diameter
ranging from 0.51" to 4.5" OD (13 mm to 115
mm).
- Have a 6 ft (2 m) long
cable from the transducers to the electronics.
- Shall include manufacturer's
recommended sensor coupling compound.
- Shall include stainless
steel sensor mounting guiderails with clamps permitting
installation and removal of transducers.
- Shall include a transducer test block to allow the
transducers and inter-connecting cables to be functionally
checked.
C. ELECTRONICS
- Have a portable, hand-held
ABS enclosure plus a padded carrying case containing
the flowmeter, sensors and accessories. Total shipping
weight shall not exceed 13 lbs (6 kg).
- Electronics shall be
designed for continuous operation at temperatures from
32° to 122°F (0° to 50° C).
- Have a built-in 16-key
programmer with user-friendly calibration menu and language
selection including English, French, Spanish, Portuguese,
Russian, Norwegian and Dutch.
- Have a 64 x 240 pixel
backlit LCD graphics display indicating positive and
negative flow rates and flow totals, calibration menu,
signal strength, battery charge status, date and time.
- Have flow proportional
opto-isolated 0/4-20mA output rated to maximum resistive
load of 620 ohms.
- Have a response time of less than 500 ms and sampling
resolution of 50 picoseconds.
- Have adjustable Reynolds number compensation for pipe
wall roughness.
- Have automatic signal
strength monitoring and indication.
- Have a battery status
indicator with automatic low battery shut off and battery
overcharge protection.
D. MANUFACTURER
The instrument shall be
a Portaflow
PT400-A Portable Ultrasonic Flow Meter by Greyline
Instruments Inc., and warranted against defects in materials
and workmanship for one year.
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