# dark calibration

**URL:** <https://community.sparkfun.com/t/dark-calibration/43801>\
**Category:** Imaging\
**Created:** [April 18, 2022, 6:42pm UTC](https://community.sparkfun.com/t/dark-calibration/43801 "2022-04-18T18:42:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![imax](https://avatars.discourse-cdn.com/v4/letter/i/dfb087/32.png) [@imax](https://community.sparkfun.com/u/imax)\
**Post date:** [April 18, 2022, 6:42pm UTC](https://community.sparkfun.com/t/dark-calibration/43801/1 "2022-04-18T18:42:56Z")

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all the spectrometers i know need a dark calibration

does the AS7265x spectral triad need dark calibration?

how to do it?

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<div class="post-metadata">

**Author:** ![jremington](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/jremington/32/6595_2.png) [@jremington](https://community.sparkfun.com/u/jremington)\
**Post date:** [April 18, 2022, 8:50pm UTC](https://community.sparkfun.com/t/dark-calibration/43801/2 "2022-04-18T20:50:01Z")

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Very simple: put the sensor in an absolutely light-tight box and record the counts from each channel, for typical integration times.

Of course you will need to disable all the LEDs.