Chapter 1 Introduction
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Moreover, it is gaining more and more recognition on the international flow meter
market.
1.2 Features
0.5% of linearity
Bilingual interface in Chinese and English
Patent balanced lower-voltage multi-pulse
Ultrasonic igniting
Built-in date totalizers
0.5 second totalizing period
100 Pico-second resolution of time measurement
0.2% of repeatability
4 flow totalizers
Built-in data logger
Good anti-interference
1.3 Principle of Measurement
The SUP-2100H ultrasonic flow meter is designed to measure the fluid velocity of
liquid within a closed conduit. The transducers are a non-contacting, clamp-on type,
which will provide benefits of non- fouling operation and easy installation.
The SUP-2100H transit time flow meter utilizes two transducers that function as
both ultrasonic transmitters and receivers. The transducers are clamped on the
outside of a closed pipe at a specific distance from each other. The transducers
can be mounted in V-method where the sound transverses the pipe twice, or
w-method where the sound transverses the pipe four times, or in Z-method where
the transducers are mounted on opposite sides of the pipe and the sound crosses
the pipe once. This selection of the mounting method depends on pipe and liquid
characteristics. The flow meter operates by alternately transmitting and receiving a
frequency modulated burst of sound energy between the two transducers and
measuring the transit time that it takes for sound to travel between the two
transducers. The difference in the transit time measured is directly and exactly
related to the velocity of the liquid in the pipe, as shown in Figure l.
