Ultrasonic Flowmeter Stationary UFL-20A

Outline
1) Transit times of ultrasonic pulses
transmitted in a liquid vary with the flow
velocity of the liquid and ultrasonic
flowmeters utilize this characteristic to
measure flow.
2) Regardless of whether the liquid is
electrically conductive or non-conductive,
ultrasonic flowmeters can measure
various types of liquids such as potable
water, river water, industrial water,
agricultural water, wastewater, seawater,
and pure water.
3) Transducers are clamped on to the
outside of the pipe so it is not necessary
to cut pipes or stop flow for installation
and there is no pressure loss.
4) Flow measurements are possible over a
wide range, -30m/s to +30m/s.
5) Economical measurements of flow from
25mm to 6000mm can be obtained.
6) Easy Operation through PC configuration software. Through graphical user interface, it is very
simple and useful for everyone to input all data.
Building a flowmeter pit
- In principle, when measurement is of underground pipe, it is suggestive to prepare of dedicated flowmeter pit.
- It is not necessary to prepare a flowmeter pit in the case of indoor or outdoor piping, but proper footing should be planned for transducer mounting and equipment adjustments in the case the pipe is located high off the floor or when pipe diameter is large.
Building a flowmeter pit
1. Select pit site (taking into consideration the following points)
1) Straight section of pipe is required for installation of transducers as explained under Part 5.
2) Consult manufacturer if an adjustable valve or pump is used.
3) To prevent noise interference or signal attenuation, coaxial cable used between joining material
and main unit [UFL-20A] should be less than 300m.
2. Size and construction of flowmeter pit
1) Using above schematic as reference, determine size of flowmeter pit based on actual piping position and conditions. Height of pit should allow person to stand while working. In cases of pipe diameters greater than 800mm, prepare footholds or footing space.
2) Implement countermeasures for floods such as drainage gutters, etc. (Install water pump where water is liable to accumulate or flood.)
3) Consult Manufacturer for other specific conditions. (Above dimensions are ideal and not the minimum required.)
Transducer installation
1. Strip paint/coating from piping surfaces at transducer mounting locations and fix transducers on piping using the accessory mounting fixtures. When mounting transducers according to the "V" method, the distance separating the transducers should be about the diameter of the pipe. If the "Z" method is used, the distance should be one half of the diameter.
2. After installing and adjusting the transducers, remove transducer mountings, and coat pipe surface with anti-rust paint.