Measuring The Sonokit - Siemens SITRANS F US SONOFLO Handbook

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SITRANS F US SONOFLO

Measuring the SONOKIT

20
4. Measuring the sensor
To allow theoretical calibration by the SONO 3000 signal converter the sensor must be measured.
The following sensor data must be known:
⇒ θ = Angle between sound track and longitudinal axis of the pipe
⇒ L = Distance between transducer windows
⇒ Di = Inner diameter of the pipe
The inaccuracies with which θ, L and Di are measured directly influence the measuring accuracy
of the finished system during theoretical calibration. Be sure to choose measuring equipment with
a suitable measuring accuracy.
θ
∆
DN 400-3000
∆L
DN 400-1000
DN 1000-2000
DN 2000-3000
∆Di
DN 400-1000
DN 1000-2000
DN 2000-3000
Step 1
Step 2
SFIDK.PS.029.V3.02 - 521H0553
The table shows the required measuring
0.1°
accuracy:
0.8 mm
2.0 mm
4.0 mm
0.8 mm
2.0 mm
4.0 mm
Measuring the angle ( θ )
Measure the angle at each transducer holder
several times and calculate the average of all
measurements at each transducer holder.
Enter angle θ of each transducer holder into the
measuring report. Calculate the mean angle of
each sound track and enter the value into the
measuring report.
Distance between transducers (L)
Measure L for each sound track and enter the
value into the measuring report.
L may be measured by inserting the mandrel or
a similar instrument into the transducer holders,
which makes it possible to measure the distance
between the thread ends of both transducer
holders, see drawing.