Everfine PF9810 - Inspection Items and Methods

PF9800SeriesUser'sManual
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30
65Hz
）
Note：thetestequipmentsshouldbequalifiedregularmetrological
verificationspecification.
8.4Inspectionitemsandmethods
8.4.1Itemsofcalibrationandtest
Testthemeasuringaccuracyofvoltage,current,activepowerandactivepowerin
PF9800seriesinstrumentinnormalwork.Theaccuracyofotherelectricparametersis
calculatedsuchaswavecrestratioandpowerfactor.
8.4.2Methodofcalibrationandtest
(1)Thewiringmethodoftestisshowninfigure8.1.Pleaseconnectthe
instrument,signalsourceandstandardmetercorrectly.
(2)Ensurethattheoutputofvoltageandcurrentofsignalisintheinputrangeof
theinstrument.Readandrecordthedataofvoltage,current,activepowerand
frequency.
Theerroriscalculatedaccordingtotheformula(1)andthemeasuringresultsshould
meetstherequirementsofmeasurementaccuracyinchapter2.2.
R=B
X
-B
N
(1)
where
：
B
N
：
readingdataofstandardmeter
B
X
：
readingdataofdetectedinstrument
R
：
instrumentmeasurementerror.