To Next Page

To Previous Page

4-10

IM WT310E-01EN

Crest Factor (CF U and CF I)

This instrument determines the voltage or current crest factor by dividing the peak value by the rms

value.

Crest Factor Equations and Displayed Values

• CFu1:TheresultofdividingtheU1peakbytheU1rmsvalueisdisplayed.

• CFu2:TheresultofdividingtheU2peakbytheU2rmsvalueisdisplayed(WT333Eonly).

• CFu3:TheresultofdividingtheU3peakbytheU3rmsvalueisdisplayed(WT332Eand

WT333E).

• CFi1:TheresultofdividingtheI1peakbytheI1rmsvalueisdisplayed.

• CFi2:TheresultofdividingtheI2peakbytheI2rmsvalueisdisplayed(WT333Eonly).

• CFi3:TheresultofdividingtheI3peakbytheI3rmsvalueisdisplayed(WT332EandWT333E).

Note

• Whenthermsvaluefallsto0.5%orless(1%orlessifthecrestfactorissetto6or6A)oftheratedrange

value, the crest factor will be displayed as an error (“Error”).

• YoucancomputethecrestfactorevenwhenthemeasurementmodeisVOLTAGEMEANorDC.

Basic Arithmetic

Therearesixdifferenttypesofcomputationthatyoucanperform(A+B,A–B,A×B,A÷B,A

÷B,A

÷B

ThevaluesofdisplayAanddisplayBareusedinthecomputation,andtheresultsofthecomputation

are shown in display C.

: A + B

: A×B

: A÷B

: A ÷B

: A – B

Note

• Themeaningsofthedisplayedsymbolsareexplainedbelow.

: + (Addition)

: − (Subtraction)

: × (Multiplication)

: ÷ (Division)

: ^ (exponentiation)

• WhenthefunctiondisplayedindisplayAistheelapsedintegrationtime(TIME),thecomputedresultis

displayed using the no data indication (------).

• Indivision,ifthevalueofthedisplayBfunctionislessthanorequalto0.0001%oftheratedvalue,the

computed value will be displayed as an error (“Error”).

4.5 Displaying the Efficiency (WT332E/WT333E only), Crest Factors, the Results of Computations Using

Basic Arithmetic, and Average Active Powers

YOKOGAWA WT310EH User Manual

Questions and Answers: