Product application, installation and service manual
ELIS PLZE
Ň
a. s.
Ultrasonic Flow Meter SONOELIS SE 4015 and SE 4025
Page 4 of 44
ELIS PLZE
Ň
a. s., Lu
č
ní 15, P. O. BOX 126, 304 26 Plze
ň
, Czech Republic, tel.: +420/377 517 711, fax: +420/377 517 722
Es 90 337 K/c
1. APPLICATION
The
SONOELIS
ultrasonic flow meters of the type series
SE 4015/ SE 4025
are intended for
measurements of
instantaneous flow rate and the total volume passed through fully-flooded piping of a large diameter. The meter
configuration includes both hardware and software for communication with higher-level control systems.
The measurement method used is suitable for measurement of fluids permitting propagation of ultrasonic waves
including electrically non-conductive fluids. To ensure high measurement precision, the meters are calibrated on a test
stand.
Flowmeters SONOELIS are used with one-beam (SE 4015) or double-beam (SE 4025) ultrasonic sensor.
2. MEASUREMENT PRINCIPLE
The meter uses the “transit-time” impulse method where the time needed for the ultrasonic signal to pass the
distance between the probes imbedded in the fluid piping is measured and evaluated. To eliminate any error due to
asymmetric placement of the ultrasonic probes, the ultrasonic ray is sent in turns in and against the fluid flow direction.
3. TECHNICAL DESCRIPTION
3.1 General information
The SONOELIS SE 4015/ SE 4025 ultrasonic flow meter is an electronic device used for the fluid flow
measurements in a fully flooded piping. It consists of two parts: the flow sensor to be installed on the piping and
associated electronic unit, usually attached to a vertical plate or wall and interconnected with the sensor by a cable.
The SE 4015/ SE 4025 flow meters can be used within piping systems of rated diameter between DN 200 and DN
1200 where the meters intended for piping sizes DN 200 to DN 500 have a slant of the probes under the angle
a
= 45
o
and those for piping sizes DN 600 to DN 1200 have a slant of the probes under the angle
a
= 60
o
(see the drawing
below):
DN 200 ÷ DN 500
DN 600 ÷ DN 1200
Fig.1 The ultrasonic ray angle with respect to the piping axis
In its standard configuration, the flow meter includes one frequency and one impulse output, electrically insulated
from the rest of the meter circuitry. On customer’s request the meter can be provided with various optional devices
such as interface to the RS 485 communication line or insulated current output. Upon adding the Pt 100 resistance
sensor measuring the fluid temperature, it is possible, based on the measured fluid volume, to calculate the mass of the
