Delphin ProfiMessage - 9.2.5.7 Phase of main vibration characteristic value; 9.2.5.8 Amplitude of the 1 X;2 X;3 X;xX vibration characteristic value

ProfiMessage
9.2.5.7 "Phaseofmainvibration"characteristicvalue
Phase angle measurement is useful only for low fre-
quencies/rotation speeds. The evaluation procedure
(see below) shows why. Further information on phase
angle definition and on measurement precision etc. is
available under Measuring the phase angle.
This characteristic value can be determined only when
a cyclical digital pulse is connected to a digital input/-
counter (e.g. the square wave pulse of a rotating
shaft). This signal delivers a stable base frequency fn
as well as a phase reference or trigger signal.
TheDSPnormalizesthetimesignal(internally,hidden)toanintegralmultipleof
thebasicfrequencyfn.

Usingthefrequencyspectrumassociatedwiththelineindexfn,theDSPdeterm-
inestheline/vibrationcomponent'sphaseangle0…360°.

9.2.5.8 "Amplitudeofthe1X/2X/3X/xXvibration"characteristicvalue
This characteristic value can be determined only when
a cyclical digital pulse is connected to a digital input/-
counter. This signal delivers the stable basic frequency
fn.
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Delphin Technology AG
Dezember 2015
ProfiMessage Manual