SFIDK.PS.029.Y1.02
8
SITRANS F US SONOFLO
Measuring the
SONOKIT
To allow theoretical calibration by the SONO
3000 signal converter the sensor geometry must
be measured.
The following sensor data must be known:
⇒ θ
= Angle between sound track and longi-
tudinal axis of the pipe
⇒
L = Distance between transducer windows
⇒
Di = Inner diameter of the pipe
⇒
h = Distance between sound track and
centre axis of the pipe
∆
θ
DN 400-3000
0.1
°
∆
L
DN 400-1000
0.8 mm
DN 1000-2000
2.0 mm
DN 2000-3000
4.0 mm
∆
Di
DN 400-1000
0.8 mm
DN 1000-2000
2.0 mm
DN 2000-3000
4.0 mm
∆
H
DN 400-1000
0.8 mm
DN 1000-2000
2.0 mm
DN 2000-3000
4.0 mm
The table shows the required measuring accu-
racy:
Measuring the inner diameter (Di)
The inner diameter Di can be calculated
on the basis of the circumference C ac-
cording to the following formula:
(t = wall thickness)
Di = (C /
π)
π)
π)
π)
π)
- (2 x t)
Measure the angle (
θ
) of each trans-
ducer holder. To get the most accurate
value, it is recommended to take several
measurements and calculate the aver-
age of these. Then calculate the average
angle for each sound track. Enter the
values in the measuring report.
To make sure that angle meter and pipe-
line are level you may place a spirit level
on the angle meter.
Measuring the distance h between sound
track and centre axis
To determine h measure Ha and Hb with
a measuring tape or a sliding gauge and
calculate h using the formula:
Ha + Hb
h =
4
Enter h into the measuring report.