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Alpy calibration - User guide

Figure 1.2: Main calibration lines

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Страница 1: ...DC0018B feb 2014 Alpy calibration User Guide Olivier Thizy olivier thizy shelyak com François Cochard francois cochard shelyak com ...

Страница 2: ......

Страница 3: ...Alpy calibration module User Guide Olivier Thizy olivier thizy shelyak com François Cochard francois cochard shelyak com February 2014 Ref DC0018 rev B ...

Страница 4: ...ibration principle 4 1 4 Power supply 7 1 5 Mechanical interfaces 7 2 Using the calibration module 8 2 1 Testing the module 8 2 1 1 Remote control 9 2 1 2 Lamps lifetime saving function 9 2 2 Installing the Alpy calibration module 9 2 3 During observations 10 3 Maintenance 12 3 1 Replacing the calibration lamp 12 3 2 Replacing the flat lamp 13 2 ...

Страница 5: ...n of the Alpy calibration module how to install tune it on the Alpy 600 and how to observe with it Astronomical spectroscopy is a never ending story We ve thought about a lot of applications for the Alpy instrument you can find some ideas on the Shelyak Instruments website 2 However we know that you ll invent new ones We ll be very happy to take your experiences into account to continuously improv...

Страница 6: ...y calibration principle Making accurate measurements in spectroscopy re quires flat field and calibration images taken under the same conditions as the starlight The principle of the Alpy calibration module is as follows When deactivated the light coming from the telescope goes directly to the spectroscope When the calibration module is activated a screen masks the light beam coming from a telesco...

Страница 7: ...mm see fig 1 1 below Weight 300 g Power supply voltage 12 V Positive in the central pin Power supply current 1 A max Power supply connector standard 5 5x2 5mm Mechanical interface 4 screws T mount thread M42x0 75mm Table 1 1 Alpy calibration specifications Figure 1 1 Alpy calibration dimensions 5 ...

Страница 8: ...Alpy calibration User guide Figure 1 2 Main calibration lines 6 ...

Страница 9: ... 12V The power supply socket is the central one The connector is a standard 5 5 x 2 5mm with the positive voltage on the central pin outside is ground The current is 1A max It is the halogen lamp which is the main consumer 500mA Of course when the lights are switched off the consumption of the mod ule is only a few µA The electronics include a voltage converter from 12V to 300V to excite the Argon...

Страница 10: ...p left switch The screen moves to the middle of the calibration module and the calibration lamp is illuminated the intensity is low look directly at it in a dark room A LED indicates that the lamp is on It will be useful when the Alpy calibration moduleis on the telescope no light other than LED will be visible from outside Now switch off the calibration lamp and switch on the flat lamp This lamp ...

Страница 11: ... controlling the Alpy calibration mod ule remotely take care that the manual switches are OFF 2 1 2 Lamps lifetime saving function The lamps mainly the calibration one have a lim ited lifetime In normal conditions it should be with out significant effect because the exposure time for calibration spectra is short a few seconds each But we know by experience that it is possible to forget to switch o...

Страница 12: ...four screws Attach the T mount 2 adapter to the Alpy cali bration module The instrument is now ready for installation on the telescope refer to the Alpy 600 and Alpy guiding user guides 2 3 During observations Once the Alpy spectroscope including the calibra tion module is installed on the telescope plug in the power supply middle socket When observing the stars the calibration module has no effec...

Страница 13: ... but typical exposure times are 120 seconds for calibration 10 seconds for flat field In any case always make sure that your images are not saturated refer to the Alpy 600 user guide LEDs meaning summary Both LEDs are off the calibration module is deac tivated the light beam coming from star is open One LED is on the matching lamp is on and the screen is across the telescope beam Both LEDs are fla...

Страница 14: ...quired if you have enough room around the calibration module to use a screwdriver 3 1 Replacing the calibration lamp Before any maintenance on the calibration module switch off any power supply re move the plug Remove the screw in the middle of the cover and loosen the other two Remove the cover Loosen the two screws in the calibration lamp con nector Replace the lamp The lamp is asymmetric Put it...

Страница 15: ...ble Tighten the three screws that s it 3 2 Replacing the flat lamp Before any maintenance on the calibration module switch off any power supply re move the plug Remove the screw in the middle of the cover and loosen the other two Remove the cover Unplug the servo cable Remove four screws around the module Gently slide the electronics from the calibration mod ule body Take care to protect the halog...

Страница 16: ...lace the lamp Put back the electronics in the body Tighten the four screws around the calibration module Plug in the servo connector take care of the orientation refer to the circuit markings Put back the cover taking care of the servo cable Tighten the three screws that s it 14 ...

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