Vega VEGAMET 624 - 12 Device Trend;Data Logger (Only VEGAMET;VEGASCAN)

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12Devicetrend/Datalogger(onlyVEGAMET/VEGASCAN)
RS232/Ethernet connection • VEGAMET 391/624/625, VEGASCAN 693, PLICSRADIO C62
30325-EN-130701
12 Device trend/Data logger (only VEGAMET/
VEGASCAN)
12.1 General information
WiththedevicerecordingthemeasuredvaluesofaVEGAinstrument
canbemonitored.Therearetwooptionsfortrendrecording:
ThedataaresavedoveracertainperiodintheVEGAinstrument
andcanbereadoutagainlateron.ViaPACTwa re andDTMdierent
recordingconditionscanbesetandtheprocesscanbestartedor
stopped.Themax.recordingperiodislimitedbythememoryofthe
signalconditioninginstrument.Themax.recordingperioddiersde-
pendingontherecordingtype(intervalormeasuredvaluedierence).
Whenrecordingwithinterval,amaximumof200000measuredval-
uescanberecorded,whenrecordingwithmeasuredvaluedierence,
themaximumisreducedto140000.Ifameasuredvalueissaved
everyminute,aperiodofe.g.138daysresults(withmeasuredvalue
dierence).Ifmorethanonecurveisrecorded,thisperiodisreduced
accordingly.
Note:
Therecordeddataarewritteninaperiodoftwotoveminutesfrom
theinternalRAMtoaashdisk.Incaseofvoltagefailure,recordings
ofthelastminutescangetlost.
ThedataareonlysavedonthePCduringanonlineconnectionwith
PACTware andDTM.Themax.recordingperiodislimitedonlybythe
storagespaceontheharddisc.
12.2 Setting of the device trend
ThesettingsarecarriedoutintheDTMunderthemenuitem"Diag-
nostics - Device trend - Settings".Dependingonthedevice,upto15
curvesareavailable(3xwithVEGAMETor15xwithVEGASCAN).If
required,thesecurvesareactivatedordeactivated/deletedonthis
side.Bypushingthebutton"Add",aninstallationassistantforcreating
theselectedcurveisstarted.Thefollowingsettingsarecarriedout
step-by-step:
Intherststepyouhavetoselecttherequestedmeasurementloop
andthemeasuredvalue.
Hereyousettherequestedrecordinginterval.Thefollowingoptions
arepossible:
•
"In time interval":Recordingiscarriedoutincertainadjustable
timeintervals
•
"With measured value dierence":Recordingiscarriedoutmeas-
uredvaluedependentwithadjustablemeasuredvaluedierence
Acombinationofthetworecordingmodesisalsopossible.
Device trend
DTM trend
Measurement loop/Meas-
ured value
Recording mode