SICK FLOWSIC550 User Manual

11
8027872/1JTM/0-8/2023-05| SICK O P E R A T I N G I N S T R U C TI O N S | FLOWSIC550
Subject to change without notice
PRODUCT DESCRIPTION 3
3 Product description
3.1 Product identification
The type plates are located on the the signal processing unit and the meter body.
▸ For a detailed view of the type plates, see “Type plates”, page 46.
3.2 Measuring principle
3.2.1 Gas flow meter
The FLOWSIC550 works according to the principle of ultrasonic transit time difference
measurement.
Fig. 1: Functional principle
Measured signal transit times t
AB
and t
BA
are defined by the current sound and gas velocity.
Gas velocity v is determined from the difference between the signal transit times. Therefore
changes in the sound velocity caused by pressure or temperature fluctuations do not affect
the calculated gas velocity with this measurement method.
The FLOWSIC550 calculates the volume flow rate internally from the gas velocity and the
diameter of the measuring section of the gas flow meter.
Product name: FLOWSIC550
Manufacturer:
SICK Engineering GmbH
Bergener Ring 27
D-01485 Ottendorf-Okrilla
Germany
v = Gas velocity
L = Measuring path
 = Angle of inclination in °
t
AB
= Sound transit time
in flow direction
t
BA
= Sound transit time
against flow direction
D
I
= Pipe inner diameter
Q = Volume flow
Q

4
---
D
I
2
L
2 cos
----------------
t
BA
t
AB
–
t
AB
t
BA

----------------------
 =

SICK FLOWSIC550 Specifications

General

Brand	SICK
Model	FLOWSIC550
Category	Measuring Instruments
Language	English