Standard Specifications
IM 01G05B03-01E 1st Edition
1
A Standard Specifications
US300FM
General
Fluid:
Liquid (Turbidity < 10,000 mg/L, Sound velocity 800 to
3,500 m/s, Temperature –30 to +200°C / –22 to +392°F)
Measured Quantities:
Volume flow, mass flow (by setting density), flow
velocity, sound velocity in the fluid
Measuring Principal:
Transit time method using ultrasonic signal
Pipe Sizes:
25 to 6,500 mm (1 to 255 inches) (covered by three
types of transducers)
Pipe and Lining Materials:
Carbon steel, Stainless steel, Grey cast iron, Ductile
iron, Copper, Glass, PVC, etc.
Flow Velocity Range:
±0.01 to ±25 m/s (±0.033 to ±82 ft/s)
Resolution:
0.025 cm/s (0.01 in/s)
Repeatability:
0.15% of reading ±0.01 m/s (0.033 ft/s)
Accuracy:
(Note) Under fully developed rotationally symmetrical flow
profile
Volumetric flow:
±1 to 3% of reading ±0.01 m/s (0.033 ft/s)
depending on pipe geometry and accuracy
of entered pipe dimensions.
Flow velocity:
±0.5% of reading ±0.01 m/s (0.033 ft/s)
over sonic path
Measuring Cycle:
100 to 1000 Hz (per one channel)
Straight Pipe Run in the Upstream:
10 to 50 pipe diameters, depending on the kind of flow
disturbances
Ultrasonic Flowmeter, Main Unit
Housing Material:
Aluminum
Painting:
Front cover:
Deep sea moss green, Polyuretane and
acrylic resin corrosion-resistance
waterbased coating
Back cover:
Agate grey, Polyester resin corrosion-
resistance powder coating
Degrees of Protection:
IP65 (EN60529)
Mounting Method:
Wall mounting
Pipe mounting fixture (for 2-inch pipe, optional)
Measuring Input :
One or two (dual) (Channel A, Channel B).
Current Output:
One or two
Range 4 to 20 mA (Load resistance 0 to 500
Ω
)
Note: The current outputs may temporarily turn unstable
during the power-on sequence (including restarting
after power failure) and parameter display / setting
mode. Take care of your process not to be affected
by this behavior.
Frequency Output:
None (standard), or one (optional)
Range 0 to 1 kHz
Contact type: Open-collector, 24 V / 4 mA
Binary Output:
None (standard), one, or two (optional)
Contact type: Open-collector, 24 V / 4 mA
Input / Output Terminal Configuration:
Screw-type pillar terminals
LCD Display:
2 line x 16 character LCD display with backlight.
Configurable to display two measured values (e.g., flow
rate and total flow) simultaneously, or to display values
from optional dual input channels alternately.
Keyboard:
15 keys (numerical, functional, or both) including four
arrow-shaped keys for cursor operation, enabling easy
access through its interactive menu structure.
Display Language:
Czech, Danish, Dutch, English (default), French,
German, Norwegian, Polish, Turkey
Flow Measurement:
Flow velocity, Volume flow, Mass flow
Sound Velocity / Signal Amplitude Measurement (On-
line):
Sound velocity and signal amplitude in the fluid
available on-line simultaneously with flow measurement.
Totalization Function:
Totalizes the volume flow or mass flow. Ten-digit
number for both forward/reverse directions of each
channel.
Damping Function:
Time constant 0 to 100 seconds, moving average.
Sound Velocity Measurement (Off-line):
Measures the sound velocity of unknown fluid starting
from its estimated sound velocity. The result can be
transferred to the current fluid parameter.
