Design - Siemens SITRANS F Series Operating Instructions Manual

Description

3.2 Design

t
K
This measuring principle offers the advantage that it is independent of variations in the actual
sound velocity of the liquid, i.e. independent of the temperature.
The Proportional factor K is determined by wet calibration or calculated by "Auto" in case of
manual programming of mechanical geometrical pipe data (SONOKIT only). The transducer
angle (Θ), distance between sensors (L) and pipe dimension (Di) are shown in the figure below.
Figure 3-2
The ultrasonic signal is sent directly between the transducers. The advantage gained sending
signals from point to point is an extremely good signal strength.
3.2 Design
SITRANS F US SONO 3300 with FUS060 is designed for measuring the flow velocity of liquids
in full pipes. Satisfactory function of the ultrasonic flowmeter depends on a low sound
attenuation of the medium and a well-defined and stable flow profile.
The sensor SONO 3300 with transmitter FUS060 remote mounted measures with a high
accuracy (better than ±0,5% of reading over a wide measuring range).
Figure 3-3
12
= Transit time
= Proportional flow factor
1A
Measuring principle
SITRANS F US SONO 3300 (shown without transmitter type FUS060)
1B
Operating Instructions, 01/2010, SFIDK.PS.029.J4.02
SITRANS F US SONO 3300