© PCE Instruments
34
Eng
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Spacing between the sensors
The distance between the upstream and the downstream sensor can be seen in window M25. The
window states the inner distance between the two sensors which you should stick to as accurately as
possible. The information in M25, however, must only be considered a coarse adjustment. The fine
adjustment is carried out by arranging the spacing in a way that the time constant in M90 is exactly
100%.
To ensure accurate measurement values, the following data must be entered:
(1) Outer diameter of the pipe (M10)
(2) Material thickness of the pipe (M11)
(3) Material of the pipe (M14)
(4) Liner of the pipe (M16)
(5) Type of liquid (M20)
(6) Type of sensors connected (M23)
(7) Mounting method of sensors (M24)
(8) Check the spacing in window M25 and fix the sensors accordingly.
(9)
!!! During installation, make sure that the value of the time constant in M90 is 100 %,
that the signal strength is >700 and that the signal quality is >60.
Selection of the measurement method
V method
The V method is the most commonly used method for everyday use. It is ideal for inner pipe
diameters of 20 to 300 mm. It is also called reflective method.
Top view of pipe
1
Upstream transducer
2
Spacing
3
Downstream transducer
4
Flow direction
