1.0 GENERAL INFORMATION

1.0 GENERAL INFORMATION

Thismanualcontainstechnicalandgeneralinformationconcerningtheinstallation,operationandcalibrationoftheHastings HVC-282VacuumGauge,andassociatedcomponents.

Forproperoperation,theHastingsHVC-282VacuumGaugemustbesuitablyconnectedtoaHastingsModelDV-273Gauge Tube. AttemptingtousethisVacuumGaugewithanyothertransducermaydamagethegaugeandortransducer.

1.1 Description:

TheHVC-282vacuuminstrumentoffersadigitalreadoutof0-20Torrwith0.01Torrresolution withtwoadjustablesetpoint relays,usingainternationalinputpowersupplyfor115/220VAC50/60Hzoperationdependingoninternalswitchconfigura- tion(PleaseseeSec.4.0),allinastandard HastingsVTGaugeunit. TheDV-273Hastingsgaugetubeisruggedbut sensitive,specificallymadeforthisrange,andmatchedforinterchangeabilitywithoutrecalibrationgivingextraversatilityfor allvacuumapplications. Tubesaretemperaturecompensated,butdorespondtolarge Ttransients,requiringinsulating tubestoreducetemperaturetransients.

1.2 OperatingPrinciple:

OperationoftheHVC-282VacuumGaugeisbasedonalowvoltageDCbridgewhichheatsanoblemetalthermopile. A changeinpressurecreatesachangeinthethermalconductivityofgassurroundingthethermopile,thusatvacuum,little powerisusedtoheatthethermopileandatfullscalerequiresmaximumpower. Powerlevelisindicativeofvacuumlevel presentintube.

1.3 Specifications:

Range/Resolution

0-20Torr/0.01Torr

Readout

31/2digitLCDdisplay.

LinearOutput

0-2VDC±5%&3mVwithfinespanadjustment.

SetPoints

0-20Torr/0.01Torr,stabilityof±3countsover00to500 Coperationalrange.

Accuracy

±5%ofreading&±3counts. Gaugetubemustbeprotected

 

fromlargetemperaturetransients.(See3.2)

Repeatability

±1%ofreading&±3counts. Gaugetubemustbeprotected

 

fromlargetemperaturetransients.(See3.2)

PowerRequirements

115VAC±15Vor220VAC±30V(Selectable)50/60Hz<4watts.

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Teledyne HVC-282 instruction manual General Information, Description, OperatingPrinciple, Specifications, Page