Delphin ProfiMessage - Page 279

ProfiMessage

Measurement accuracy
Measurementaccuracyisdeterminedbyacquisitionofthefnbasicfrequencyvia
thedigitalfrequencyinput.
SelectthesettingsSampling frequencyandNumber of samplestoenableacquis-
itionofmorethanonebutlessthantensignalperiodsinatimesignalblock.This
achievesanaccuracyof±1…5degreesforthephaseangle.
Thefollowingtableisforafrequencyspectrumwith2048and4096lines.
Acquiredsig-
nalperiods
>1 2 5 10 20
Measurement
deviation
phaseangle
±1degrees ±2degrees ±3degrees ±5degrees ±10degrees
Theruleofthumbforameasurementdeviationof±5degrees:

Examples
Samplerate 2560Hz 2560Hz 1280Hz
Numberofsamples 2048 4096 4096
Inputsignalrangeforameasurementdevi-
ationof±5degrees
1.25to
25Hz
0.625to
12.5Hz
0.3125to
6.25Hz
Convertingasinedefinitiontoacosinedefinition
279
Delphin Technology AG
Dezember 2015
ProfiMessage Manual