Problem with my new spectrometer from Aliexpress « on: March 04, 2026, 11:21:22 AM » Author: dor123
I bought this spectrometer from Aliexpress. However it have problems as you can see from the attachment, where it can't capture the correct spectra of lightsource like my Osram HCI-TS 70W/830. Also: I don't know how to import spectra to my computer with it. Why this is happening?
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	Re: Problem with my new spectrometer from Aliexpress « Reply #2 on: March 05, 2026, 01:12:08 AM » Author: LightsAreBright27
Maybe you need to calibrate it? Use a light source with known wavelength (either lasers or gas discharge lamps) to calibrate the spectrometer. Keep in mind don't point lasers at the spectrometer directly, point it towards paper.
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	Re: Problem with my new spectrometer from Aliexpress « Reply #3 on: March 05, 2026, 03:19:29 AM » Author: dor123
I don't know how to calibrate this spectroscope. @RRK, @James, can you help me?
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Problem with my new spectrometer from Aliexpress « Reply #5 on: March 05, 2026, 11:50:52 AM » Author: LightsAreBright27
If im not wrong, your spectrometer is model LS335. If its of any help, try downloading the manual for it here.
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	Re: Problem with my new spectrometer from Aliexpress « Reply #6 on: March 05, 2026, 12:15:36 PM » Author: dor123
There is no calibration instructions in the manual. "Note: The calibration function is restricted to use by metrology institutes only and is prohibited for use by non-professionals."
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Problem with my new spectrometer from Aliexpress « Reply #7 on: March 05, 2026, 01:45:27 PM » Author: LightsAreBright27
@dor123 , have you tried the spectrometer with single wavelength light sources? See if the reading on the spectrometer matches with the actual wavelength. For example, a red laser is ~650nm, a green laser is ~532nm, a violet laser is ~405nm, a neon lamp has a peak at 632.8nm. If the values for these are close (+ or - a few nm) then the spectrometer should be correct. (Don't point the laser directly on the spectrometer, point the lasers on a white wall and place the spectrometer pointed towards the wall looking at the laser dot.)
« Last Edit: March 05, 2026, 02:10:51 PM by LightsAreBright27 »		Logged

Holder of the rare F10T12/BL Preheat Fixture here!
Also known as LAB27 for short.
245v 50Hz