2. Full pipe flow measurement
2.1 How transit time difference measurement works
2.1.1 General principle of a measuring rope
A measuring string consists of two opposing probes facing each other, the first placed upstream (probe A), the second downstream (probe B).
Depending on its design, the flowmeter emits on one of the two probes either a wave train of about ten alternations, or (the technique most often used) an excitation pulse with an amplitude of 100 to 400 V and a duration of 0.25 to 3 µs (figure
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Full pipe flow measurement
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