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. |