INSTRUCTION
MANUAL
MODEL HVC-282
VACUUM CONTROLLER
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TABLE OF CONTENTS
SECTION 1.0 GENERAL INFORMATION........................................................................................... 5
1.1 Descripion......................................................................................................................... 5
1.2 Operating Principle ..................................................................................................................................... 5
1.3 Specifications ............................................................................................................................................ 5
1.4 Accessories ................................................................................................................................................ 6
SECTION 2.0 GAUGE TUBES AND CABLES .......................................................................................... 7
2.1 Gauge Tubes ............................................................................................................................................... 7
2.2 Gauge Tube Cables ..................................................................................................................................... 7
SECTION 3.0 INSTALLATION PROCEDURE ........................................................................................... 8
3.1 Panel Mounting .......................................................................................................................................... 8
3.2 Gauge Tube Installation .............................................................................................................................. 8
SECTION 4.0 OPERATION ....................................................................................................................... 9
SECTION 5.0 CALIBRATION AND TROUBLESHOOTING GUIDE ............................................................ 10
5.1 Checking of Tube ........................................................................................................................................ 10
5.2 Calibration of Gauge and Gauge Tube ........................................................................................................ 10
5.3 Check Against Primary Standard ................................................................................................................ 11
SECTION 6.0 NOTES ON VACUUM MEASUREMENT .............................................................................. 12
6.1 Effects of Condensable Vapors ................................................................................................................... 12
6.2 Outgassing ................................................................................................................................................. 12
6.3 Effect of Thermal Conductivity ..................................................................................................................... 12
6.4 Effects of System Conductance .................................................................................................................. 12
SECTION 7.0 SERVICE INFORMATION..................................................................................................... 13
7.1 Warranty Repair Policy ................................................................................................................................ 13
7.2 Non-Warranty Repair Policy......................................................................................................................... 13
7.3 Service Form ............................................................................................................................................... 15
SECTION 8.0 DRAWINGS AND DIAGRAMS .............................................................................................. 17
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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±3countsover00 to500 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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Hi/LoRelays............................................................................... SPDT N.O./N.C.upto125VAC10A or277VAC6A
Withonetime≈10sec.delaytopreventrelaychater,
onlyduringunitpowerup.
OperationalLimits ....................................................................................... 00to50OC<80%RHnon-condensating.
Storage:-200to500C(Non-operational).
Size .......................................................................................................... HastingsCVTGaugestandardpackage
WeightApprox. ................................................................. 20.2oz./12oz.(0.58Kg/0.33Kg)unitandcablesrespectively.
Cables ....................................................................................... 6ft.powercableand8ftgaugetubecablesupplied.
Gaugetubecableextensionsavailable.
GaugeTubeOverpressure ..................................................................................... 150psiMax.(Absolutepressure)
GaugeTubeConstruction ........................................................................... Nickel-platedsteelwithplasticoctalbase
StockNo. ........................................................................................ HVC-282(55-282),DV-273Gaugetube(55-273)
1.4 Accessories:
EXTENSIONCABLES: Availablein12-ft.,25-ft.,50-ft.,and100-ft.lengths.
STOCK# MODEL# DESCRIPTION
65-113 TIN-8-VS 8-footreplacementcable
55-84 VP-12-VS 12-footextensioncable
55-85 VP-25-VS 25-footextensioncable
55-86 VP-50-VS 50-footextensioncable
55-87 VP-100-VS100-footextensioncable
GAUGETUBEINSTALLATIONACCESSORIES: Quickconnects,dropouttraps,adapters,andvalvedquickconnects(see
ProductBulletinNo.352).
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2.0 GAUGE TUBE AND CABLES
2.1 GaugeTubes:
Octalsocketsofstandardmetaltubesarecolor-codedforeasyidentification;DV-273isdarkblue.Thetubesaretobe
installedin1/8"NPTfemalethread,orinaHastingstypeOSQuickConnector.Maximumoverpressureofgaugetubeis150
psi.ConstructionofshellisofNickel-platedsteel.Seesection1.2forOperatingPrinciple.
2.2 GaugeTubeCables:
Thefourcolor-codedwires(Black,Red,White,Green)areconnectedasshownonthelabelonthetopofcan. SeeFigure2.1
forsocketconnections.
Eachinstrumentisshippedwitha6-footpowercableandan8-footgaugetubecable. Extensiongaugetubecablesare
available.(SeetableinSec-1.5).
FIG.2.1
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3.0 INSTALLATION
3.1 PanelMounting:
Section8ofthismanualshowsanoutlinedrawingdetailingpanelcutoutforastandardHastingsCVTGauge. Installthe
meteronthepanelusingthesuppliedhardware.
3.2 GaugeTubeInstallation:
Situatethegaugetubeinaclean,dryvacuumsystemwiththeopenendpointingdownsoastobeself-drainingshouldany
vaporscondenseinit(seeSection6.0). Screwmetaltubesinto1/8"femaleNPTthreadsusingasuitablesealant;Teflon
tapeisrecommended,oruseHastingsQuickConnectO-ringsealsforavacuumtightinstallation. DonotuseQuick
ConnectiftubewillseepressuresgreaterthanATM.
ForinformationonHastingsInstallationAccessories,refertoProductBulletin#352.
Gaugetubemaybeoperatedimmediately,butbestresultswillbeobtainedafterthetubehasoutgassedforapproximately1
hour.
Tubesaretemperaturecompensated,butdorespondtorapidtransientenvironmentalchanges(greaterthan5degreeC/
min.) Tominimizetemperaturetransientseffectspleaseinsulategaugetubewithglasswraporothersuitableinsulation
wrap.
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4.0 OPERATION
1) PluginpowercableintoanysingleortwophaseAClinefor115VACor220VAC50/60Hzoperation,perunitconfiguration.
Tochangeinputvoltageconfiguration,removeallconnectingwirestorearterminalstrips,thenremovingtwosmallscrews
atrear,removecan. OnlowerPCboardpushslideswitchtowardrearofcanfor115VAC,andtowardfrontofcanfor
220VAC,reassembleinoppositeorder.Remarkcanastonewvoltageconfiguration. A3-wiregroundedpowercordis
suppliedwithallgauges,ifdifferentconnectorisrequired,pleasesubstituteappropriate3-wiregroundedpowercord.
Pleaseallow30minutesfortubetoadjusttonewambientconditionswhenmovinggaugetubefromoneenvironmentto
another. (Seesection3.2)
2) UnitcannowbeoperatedwithaDV-273thathasbeeninstalledasdetailedinSection3.2.
3) RelaysetpointareadjustedbypressingswitchonfrontdisplaytowardHIorLO,andusingasmallscrewdrivertoturn
trimpotonsamesideyourpressingswitch,toadjustandsetdesiredsetpoint. YoumayconfigureeitherN.O.orN.C.by
choiceofconnectiononbackofterminalblock. (SeelabelontopofHVC-282can.)
4) 0to2VDClinearoutputmaybefinelyadjustedbyturningtrimpotonleftcenterofcan.(Viewedfromfrontdisplay.)
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5.0 CALIBRATION AND TROUBLESHOOTING GUIDE
AllHastingsVacuumGaugesandGaugeTubeshavebeencarefullycheckedandcalibratedatthefactorybeforeshipment. If
acalibrationcheckisdesired,themethodsinthefollowingsectionsmayprovehelpful.
5.1 CheckingofTube:
Thesimplestandquickestmethodofcheckingoperationandcalibrationofagaugetubeistokeepanewsparecleangauge
tubeonhandasa“standard”. Tocheckoperation,installbothnewandoldgaugetubestogetherinthesameclean,dry
vacuumsystem,andpumpuntilasteadypressureisobtained. Plugthegaugeontobothtubesalternatelyandcheck
readings. Iftheoldtubereadsahigherpressurethanthenewone,thisindicatesashiftintheoldtubewhichismost
probablytheresultoftubecontamination. Calibrationcanpossiblyberestoredbygentlyswishingsolventsuchasacetone,
orethylalcoholinthetubeend. Aftercleaning,thoroughlyairdrythetube. (Caution:Donotusehighpressureairjet,asthis
willdamagethethermopileanddamagegaugetube.) Ifcalibrationcannotberestoredbythisprocedure,replacetheold
tubewithanewgaugetube. Thetwotubescantrackoneanotherwithinclosetolerance,however,varianceofupto2xof
accuracyspecificationstatedfortubemaybeseen,orcheckthegaugetubebymethoddescribedinSection5.2.
CAUTION: DonotattempttomeasuretheresistanceofthegaugetubeelementwithaDVMwhileitisunderhardvacuum
unlessitsupplieslessthan350mVtoperformmeasurement,ormorethan929mVat15Torr,andnevermorethan1.5Vat
ATMbetweenpins2(Black)and8(Red). Agoodtubewillreadaround25-30ohms. Ifopenordamaged,thermocouples
willreadmuchhigher.
5.2 Calibration
AllHVC-282VacuumGaugeshavebeencarefullycheckedandcalibrated,alongwithDV-273GaugeTubeswhichare
independentlymatchedforinterchangeability. Ifforsomereasonyouneedtocalibrateeithergaugeorgaugetube,please
carefullyfollowcalibratinginstructionsbelow.
DV-273calibration. WedonotrecommendrecalibrationoftheDV-273gaugetubebecauseofequipmentrequirements,but
wedoincludeasuitablemethodforyourreference. BestpossibleaccuracywillrequireaPrimaryStandardandpump
systemwiththeabilityofpumpingdowntoatleast1mTorrorbetter. PleaserefertoFigure2.1.
NOTE: Forbestpossibleresults,temperaturechangesmustbeminimized,i.e.;handlingmustbeminimized. (SeeSec.3.2)
PleasereadSection3.2.
a) Apply350mVDC±50µVtopins(+)8&(-)2.
b) Pumpsystem/gaugetubedowntohardvacuum,<1mTorr.
c) UsingaDVMwitha200mVorbetterscale, connectedto(+)4&(-)6andadjustcenterpotin
gaugetubeto0.000mV±5µV.
d) Bringsystem/gaugetubeto15.000±1mTorr.
e) Increaseapplied350mVto929.85mV±50µ(V. CAUTION:Possiblegaugetubedamagewill
resultif atlessthan15Torr.
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f) Adjust outside pot to read 2.630mV ±5µV on DVM.
g) DV-273 gauge tube is now calibrated.
HVC-282calibration.
Courseadjustment
(Caution:Resistorconnectionsarenottoanypowerterminals.)
a) Withpoweroff,connectan86.6ohm1%1/8Wresistortotubeterminalswhite&green.
b) Connecta28ohm1%1/8Wresistortotubeterminalsredandblack.
c) ConnectaDVMtomeasuremVacrossthe28ohmresistorwith(+)leadtoredterminal.
d) Withpoweron, adjusttrimpotonrightsideofcan(Viewedfromfrontdisplay.)
toset350mV±0.5mV.
e) Setunitsdisplaytoread0.00byadjustingzeropotatrearofcan.
f) Withpoweroff, attacha2.630mV±5µVDCsourceacross(+)white(-)greenthe86.6
ohm resistor.
g) Withpoweronadjustspanpotatrearofcantilldisplayreads15.00Torr.
Hastings) HVC-282 is now coarsely calibrated.
Fine adjustment.
Due to bridge loading, you will need to readjust zero and span pots using a good or above calibrated DV-
273.
a) Connect and run unit for 30 minutes at hard vacuum (< 1mTorr) so system may out gas.
b) Readjust zero pot at rear of can if necessary, to set display to read 0.00 Torr.
c) Using a Primary standard, bring system up to 15.000 Torr ±1mTorr.
d) Readjust span pot at rear of can if necessary, to set display to read 15.00 Torr.
e) Fine Calibration is now complete.
5.3 Check Against Primary Standard:
If additional calibrations of the vacuum gauge are desired, an accurate measuring device such as the
McLeod Gauge, spinning rotor gauge, or capacitance manometer may be employed as a reference.
Please refer to manufacture for the suitability requirements. Please read Sec. 6.
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6.0 NOTES ON VACUUM MEASUREMENT
6.1 Effects of Condensable Vapors:
If the readings of Hastings Vacuum Gauges are to be compared with readings of other types of gauges,
consideration must be given to the possible effects of condensable vapors in the system on the other
gauges. For example, none of the many types of the McLeod Gauge give correct readings if condensable
vapors such as water, alcohol, acetone, etc., are present in the system/gauge. The McLeod Gauge
operates by compressing residual gases and vapors to obtain a reading, thus this compression will tend to
condense any vapors that are present. This usually results in the McLeod Gauge reading a lower pressure
than actual. Unlike the McLeod Gauge, the Hastings Thermopile Vacuum Gauges have the very useful
property of responding to the total pressure of all gases and vapors that are present in the system/gauge
tube.
To exclude vapors from the McLeod Gauge it is necessary to employ a trap of some kind that will absorb
or condense the vapors. Water vapor is by far the most common source of difficulty. A trap cooled by
liquid nitrogen is effective in removing vapors, also system must be given time to outgas. Reference should
be made to the instructions furnished by the manufacture to the suitability needs of Gauge used.
6.2 Outgassing:
Hastings Gauge Tubes are made of materials that have been proven by years of usage to be relatively free
from outgassing. However, all surfaces of glass and metal that are exposed to the vacuum system may
liberate gases and vapors that were previously absorbed during exposure to the atmosphere. If the sur-
faces are contaminated with foreign matter, this outgassing may be much more persistent than if the
surfaces are clean. The possibility of outgassing must be considered in checking the accuracy of
Hastings Gauges or in checking for leaks. This is especially important when working with pressure of less
than 10 microns of mercury (or .01 millibars). In this range of pressure, outgassing from surfaces in a
newly evacuated system may flood the enclosure. Also, if the system is being pumped continuously,
gauges spaced at different distances from the pump will register different pressures. For reliable compari-
son of different Vacuum Gauge, it is necessary then to insure that the vacuum system be free of any
outgassing or other possible leaks, and that they be taped to the system near the same point. This can
best be determined by closing the system off from the pumps and observing if there is any rise in pressure
within the range of interest.
6.3 Effect of Thermal Conductivity:
All Hastings Vacuum Gauges are originally calibrated in dry air. Since this calibration is a function of
thermal conductivity, any gas having a thermal conductivity different from that of air will also have a different
calibration.
6.4 Effect of System Conductance:
Each element that makes up a vacuum system has associated with it a certain conductance (this is the
opposite of resistance). For example, baffles, connecting tubing, and sharp turns can all cause pressure
drops throughout the system during pumping and during the time the system is reaching static equilibrium.
It is not an uncommon occurrence to measure different pressures at different locations in a vacuum
system. In checking the calibration of any vacuum gauge, care must be taken to insure that the gauge
and the reference are at the same pressure.
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7.0 SERVICE INFORMATION
7.1 War ranty Repair Policy
Hastings Instruments warrants this product for a period of one year from the date of shipment to be free
from defects in material and workmanship. This warranty does not apply to defects or failures resulting
from unauthorized modification, misuse or mishandling of the product. This warranty does not apply to
batteries or other expendable parts, nor to damage caused by leaking batteries or any similar
occurrence. This warranty does not apply to any instrument which has had a tamper seal removed or
broken.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty as
to fitness for a particular use. Hastings Instruments shall not be liable for any indirect or consequential
damages.
Hastings Instruments, will, at its option, repair, replace or refund the selling price of the product if
Hastings Instruments determines, in good faith, that it is defective in materials or workmanship during
the warranty period. Defective instruments should be returned to Hastings Instruments, shipment
prepaid, together with a written statement of the problem and a Return MaterialAuthorization (RMA)
number. Please consult the factory for your RMAnumber before returning any product for repair.
Collect freight will not be accepted.
7.2 Non-War ranty Repair Policy
Any product returned for a non-warranty repair must be accompanied by a purchase order, RMAform
and a written description of the problem with the instrument. If the repair cost is higher, you will be
contacted for authorization before we proceed with any repairs. If you then choose not to have the
product repaired, a minimum will be charged to cover the processing and inspection. Please consult
the factory for your RMAnumber before returning any product repair.
TELEDYNE HASTINGS INSTRUMENTS
804 NEWCOMBE AVENUE
HAMPTON, VIRGINIA 23669 U.S.A.
ATTENTION: REPAIR DEPARTMENT
TELEPHONE
(757) 723-6531
1-800-950-2468
FAX
(757) 723-3925
E MAIL
INTERNETADDRESS
Repair Forms may be obtained from the “Information Request” section of the
Hastings Instruments web site.
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7.3ServiceForm:
Teledyne Hastings Instruments
RMA#
804 Newcombe Avenue
(contact factory)
Hampton, VA 23669 U.S.A.
Telephone (757)723-6531 Fax (757)723-3925
Model No.
Name
Company
Address
Serial No.
P.O. No.
Phone
Date
Zip
City
State
Describe problem:
Show a block diagram of your system including unit inlet and outlet pressures:
Calibration range
Power line voltage
Ambient temperature
Other
Gas
Cable length
Variation
Gas Temperature
(If special modifications have been made by user, please describe):
Application of product being returned
Has this product been used with a hazardous material?
YES
NO
If YES, please list types of gas, chemicals (common names, specific chemical), biological
materials, or other potentially harmful materials exposed to the product during its use (attach
additional page if necessary)
PRODUCTS EXPOSED TO RADIOACTIVE MATERIAL CANNOT BE ACCEPTED BY HASTINGS
INSTRUMENTS UNDER ANY CIRCUMSTANCES.
Signature of Hazards Control Officer:
For questions regarding use of the product and materials in contact with it:
Name
Phone
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8.0 DRAWINGS and DIAGRAMS
This section contains the schematics, parts list, and overall assembly drawings. If replacement parts are desired,
they can be obtained from the factory by referencing the Hastings part number listed on the parts lists.
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USEFORMOUNTINGONESINGLE-POSITION,COMPACTVACUUMGAUGE
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