XITRON XT2640 - Viewing Fundamental Signal Vectors - the Vectors Screen; Recording Vectors

XT2640OperatingManual 13July2016 Page56of187
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Briefly,thisisperformedby–
1. InsertthedriveintothefrontpanelUSBportandwaitforittobeREADY.
2. Displaythescreentoberecorded.
3. PresstheDRIVEINFOareaofthescreen,thescreenshowsthefileexport/importscreen.
4. PresstheSCREENIMAGEbutton.Thescreenchangestoallowingyoutoenterafilename.
5. Enterthedesiredfilename(theextensionisautomaticallyprovided).
6. Ifthefilealreadyexiststhenyouarepromptedtorespondifyouwishtooverwriteitornot.
7. Thefileisthenwritten.
12.8 VIEWINGFUNDAMENTALSIGNALVECTORS‐THEVECTORSSCREEN
TheVECTORSScreengivesyouaccesstopolarchartsofvoltageandcurrentfundamentalvectorsandanumericallistingofthatdata
(whichincludessequencedataifshowingaVPAwhichisconfiguredfor3ø4wWIRING).
TheVECTORSScreencanbeselectedforviewfromanyoftheMainDataScreensbypressingtheVECTORSbutton.
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Thedisplayedvectorsandthecorrespondingnumericaldataarecontrolledbythe2buttonsacrossthetopofthescreen(inorder
fromlefttoright)–
1. SelectionofthechannelorVPAforwhichtodisplaythevectors.
2. Selectionofthevectortracestoshow.TheavailableselectionsaredependentonwhetherachanneloraVPAisselectedandifa
VPAisselectedthenalsotheWIRINGconfigurationofthatVPA.Foreachavailabletrace‐
AtraceisenablediftheSHOWbuttonishighlightedcoloredgreen.PressingtheSHOWbuttontoggleswhetherthetraceis
selectedornot.
PressingtheCOLORbuttonchangesthecolorofthattracetothenextavailablecolor,thenameofthetracebeingchanged
showswhichcolorwillbeusedforthattraceandthenumericaldataforit.
Note:
IfnofundamentalharmonicdataisavailablefortheselectedchannelorVPAthenthevectorchartisblank,thereareno
numericalresultsontheleftside,andNOFUNDAMENTALisdisplayedcenteredinthechart.
Ifnotraceshavebeenenabledtobeshownthenthevectorchartisblank,therearenonumericalresultsontheleftside,
andNOTRACESSELECTEDisdisplayedcenteredinthechart.
Ifthefrequencyisshowncoloredorangethentheharmonicsarenotlockedcloselyenoughtoallowaccuratephase
measurements.
Thelengthofallvoltagevectorsarescaledsuchthelongestvectorjusttouchestheouterboundaryofthechartandthe
othervoltagevectorsarescaledrelativetothis.
Thelengthofallcurrentvectorsarescaledsuchthelongestvectorjusttouchestheouterboundaryofthechartandthe
othercurrentvectorsarescaledrelativetothis.
Forotherthan3ø3w(2ch)WIRING,0°isthephaseofthevoltageinthelowestnumberedchannelintheVPA(ifaVPAis
selected)orthevoltagesignaloftheselectedchannel(ifachannelisselected).
Inthenumericallistingontheleftside,theanglesshownaretheanglesofeachcorrespondingvectorasshownonthe
chart.
Forthesequencedata(ifany)tohavethenormalsignificance,thewiringphasingmustbephaseAtothelowestnumbered
channelintheVPA,phaseBtothemiddle,andphaseCtothehighest.Ifthewiringisnotasdescribedthenthethree
sequencedatawillhavedifferentmeaningstothoseshown.
12.8.1 RECORDINGVECTORS
Themethodforperformingthisisfullydescribedinsection23.
YoucanmakearecordoftheVECTORSscreenbysavinganimageofittoagraphicfileonanexternalUSBdriveattachedtothefront
panelUSBport.