Speed Measurement; Acmt Measurement - Adash 4400 VA4 Pro User Manual

ADASH Ltd.
x frequency
fft fourier transform
abs absolute value
log10 common logarithm
inv inverse function

Speed measurement

The machine speed (revolutions) is measured.
When the tacho sensor is used (connected to the tacho input), then the impulses is added to all AC inputs. In
the time signal graph are marked by short red lines.
The speed measurement is taken 8 times in every second. The value is evaluated from 3 tacho events in time
signal. When the averaging is required, then more values is used. But keep in mind that only 8 values is taken in
one second.

ACMT measurement

See the Appendix A for detailed description of ACMT method.
For further technical and contact information visit www.adash.eu, email: info@adash.cz
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Adash 4400 – VA4Pro