Alcor System OMEA Manuale utente
©ALCOR‐SYSTEM 1
OMEA“AllSky”Camera
Installationandusermanual
June24th,2020revision
©ALCOR‐SYSTEM 2
TableofContents
1 Camerainstallation...................................................................................................................................................4
1.1 Camerainstallation...........................................................................................................................................4
1.2 Cameraopticalsettings...................................................................................................................................10
1.3 OMEAcameraconnections(USBversion)......................................................................................................10
1.3.1 Temperaturesensorandhumidityconnector(#1).................................................................................11
1.3.2 PowerconnectorandRS232(#2)............................................................................................................12
1.3.3 USBconnector(#3).................................................................................................................................15
1.4 OMEAcameraconnections(ETHERNETversion)............................................................................................16
2 Software..................................................................................................................................................................17
2.1 Systemrequirementandoperatingsystem....................................................................................................17
2.2 Camerainstallationsoftware..........................................................................................................................17
2.3 EmbeddedEthernetcamerasoftwareinstallation.........................................................................................21
3 Usingthecamerasoftwarecontrol........................................................................................................................24
3.1 Initializing........................................................................................................................................................24
3.1.1 Allcamerastype......................................................................................................................................24
3.1.2 OMEA8C/8Mspecificinitializationphases............................................................................................25
3.1.3 Camerasetup..........................................................................................................................................27
3.1.4 OMEA8M/8Ccoolingsetup....................................................................................................................30
3.1.5 Exposurecontrol.....................................................................................................................................31
3.2 Storageoffilesproducedbythecameracontrolsoftware............................................................................33
3.3 Cameraexposuretimeandgain.....................................................................................................................35
3.3.1 Manualmode..........................................................................................................................................35
3.3.2 Automaticmode.....................................................................................................................................35
3.4 Imagehotpixelremovalusingdarkframeimage...........................................................................................36
3.4.1 Achievingmasterdarkframe..................................................................................................................40
3.4.2 Residualhotpixelsrepair/fix..................................................................................................................42
3.5 Settingtheoverlaygrid...................................................................................................................................44
3.6 CyanogenBoldwoodorSentinelcloudsensorslinkwithcameracontrolsoftware......................................47
3.7 Magnitudepersquareseconddisplayimagemode.......................................................................................48
3.8 Telescopecontrolsoftwarelink......................................................................................................................50
3.9 Starcountforcloudcoverageestimation.......................................................................................................50
3.10 24hoverview...................................................................................................................................................51
4 Spherecondensationheatermanagement............................................................................................................54
4.1 Introduction....................................................................................................................................................54
4.2 Adjustingandstart‐up....................................................................................................................................54
©ALCOR‐SYSTEM 3
5 Weathermeasurementmodule.............................................................................................................................58
5.1 Sensorssoftwaremanagement......................................................................................................................61
6 Cameramaintenance..............................................................................................................................................63
6.1 Spherecleaning...............................................................................................................................................63
6.2 Camerainternaldesiccantreplacement.........................................................................................................64
7 Troubleshooting.....................................................................................................................................................64
7.1 Cameradoesnotdeliverimages.....................................................................................................................64
7.2 Cameradisconnectswhenheatingisactive...................................................................................................64
7.3 Dewinsidethedome......................................................................................................................................66
8 Producttermsofuse...............................................................................................................................................66
©ALCOR‐SYSTEM 4
Listofapplicableproductsofthisdocumentation
OMEA6M
OMEA6C
OMEA3M
OMEA3C
OMEA5M
OMEA5C
OMEA8M
OMEA8C
1 Camerainstallation
1.1 Camerainstallation
Thecameraworksoutdoor,itisweather‐tight.Warning,thesystemisnotsubmersible:itisnotadiving
camera.Moreover,itwillpreventallintrusionofinsects,eventhesmallestone.
ThecamerahasnomechanicalshutterandSun’sheatdoesnotcauselossofoperationofthecamera.
Pleasedonotinstallthecameranearapollutionsource(likeachimney).Giveasmuchexposureaspossible
andavoidobstacles.
Itisadvisedtolevelthecamerawithrespecttotheground.
Thecamerahasthreeanchorsontheback,thesethreeISOM6notthruthreadedholesby10mmdepth.
UsethesuppliedscrewstofixorequivalentstainlesssteelA4orA2screw.Thefollowingstandcanbeused
toinstallthecamerasafely(thisisanoptionalitem,purchasedonrequest)
Fig.1Optionalstandforthecamera
©ALCOR‐SYSTEM 5
Fig.2ThepositionofthethreescrewssecuringtheUSBcamera(yellowholes)
Therearethreeother"holes"thatarefilledwithwaterproofconnectors,leavethisspacefreeand100mm
underneathtoallowthecablestorun.
TheN,S,EandWdirectionisdefinedbyrotatingthecameraaccordingly.Thisisuptotheusertodefine
cameraorientationaccordingtoitsneeds.Pleaseperformimagecapturetestsbeforeattachingthecamera
tothepole.
Thecablesgostraightfromthecamerabottom.Ifthecablesshallbebent,respectwhatisshownonthe
picture(Fig.3)
©ALCOR‐SYSTEM 6
Fig.4Threecablesstraightdescent.
©ALCOR‐SYSTEM 7
Fig.5Minimumcableradiuscurvature.
Thewaterproofconnectorsconnectasfollows:
Identifythenumberofconnectorpinsofthecamera,itstype(male/female)
Identifythenumberofpinsoftheconnectorcordandmatch.
©ALCOR‐SYSTEM 8
Identifythekeypininsidethecameraconnectorandthekeyattheconnectorcordside.
Applyarectilinearmotion.Ifinsertionforcestrengthpersistspleaserepeatstepsfor
locatingthepinnumberandkey.Excessiveforceappliedtoconnectorcancausethe
destructionoftheconnectororabadconnectioncandamagethecamera.Incaseof
damageduetotrialstoattachcabletothewrongconnectorkind,warrantycouldbe
canceled.
Fig.6Keyoneofthethreeconnectors(powerconnector).
©ALCOR‐SYSTEM 9
Fig.7Pushtheconnectorstraight
Fig.8Thenturntheconnector’scollarinclockwisefashion
©ALCOR‐SYSTEM 10
1.2 Cameraopticalsettings
1.2.1. OMEA3xandOMEA6x
Thefocusofthelenswithrespecttotheimagesensorisfactorytuned.Itisnotpossibletoperformfocus
changesfromoutside,fortightnessreasons.
F‐numberisfixedsettoitslowestvalue,F1.6allowingverysensitiveoperationofthecamera.Thiscannotbe
changedfromoutside.
Sharpnessmayvaryfromcentertoedges,accordingtothelensdesignandlensmanufacturingquality
variations.
Openingthedomeispossible,butthiswilljeopardizeinnercameradryness:somedesiccantsbagsare
installedinsidethecamera,andifthedomeisopened,thosebagsmustbereplaced!
Infraredlight(>700nm)isblocked.Pixelsizeis2.2µmforOMEA3xandOMEA6x.
1.2.2. OMEA8xx
Thetiltofthelenswithrespecttotheimagesensorisfactorytuned.Itispossibletoperformfocuschanges
remotelybyusingtheRS232link.ALCOR‐SYSTEMwillprovidetotheuserthebestfocusencodercount
(from900to1100encoderssteps)Somevariationmayoccuraroundthisvalueduringthelifeofthecamera.
Bythesamelink,F‐numbercanbeuserselected.ThelowestF/isF2.8andmustbeusedovernight.During
thedayF/5.6orF/8canbeused.ThiscanbesetbyPCsoftware.
Sharpnessmayvaryfromcentertoedges,accordingtothelensdesignandlensmanufacturingquality
variations.
Openingthedomeispossible,butthiswilljeopardizeinnercameradryness:somedesiccantsbagsare
installedinsidethecamera,andifthedomeisopened,thosebagsmustbereplaced!
Infraredlight(>680nm)andUVlightisblocked(<420nm).Pixelsizeis3.8µm.
1.3 OMEAcameraconnections(USBversion)
Connectorskeyinganddifferentnumberofpinsarepreventingconnectionerrors.However,usermustlook
atthenumberofconnectorpinsattheendofthecordbeforeconnectingthecamera,inordertoavoid
forcingthepinsanddamagethecameraconnector.
Altri manuali per OMEA
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