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SITRANS F US SONOFLO
Measuring the
To allow theoretical calibration by the SONO
3000 signal converter the sensor geometry must
SONOKIT
be measured.
The following sensor data must be known:
⇒
⇒
⇒
⇒
8
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
SFIDK.PS.029.Y1.02
Measure the angle (
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 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)
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 =
Enter h into the measuring report.
The table shows the required measuring accu-
racy:
θ
∆
DN 400-3000
∆ L
DN 400-1000
DN 1000-2000
DN 2000-3000
∆Di
DN 400-1000
DN 1000-2000
DN 2000-3000
∆ H
DN 400-1000
DN 1000-2000
DN 2000-3000
) of each trans-
θ
4
0.1°
0.8 mm
2.0 mm
4.0 mm
0.8 mm
2.0 mm
4.0 mm
0.8 mm
2.0 mm
4.0 mm
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