No, you shouldn't switch off calibration source or disconnect the fiber. However, you can take the calibration source out of the port on the integrating sphere and block the port to take the dark. Alternatively, you can slide an opaque material in the filter slot on the front of the light source to block the light coming out of the LS-1-CAL-INT
![Color Measurement Spectroscopy [SpectraSuite]](http://i.ytimg.com/vi/LVHbaDs5yVw/mqdefault.jpg)
![Color Measurement Spectroscopy [SpectraSuite]](/img/tr.png)
No, you shouldn't switch off calibration source or disconnect the fiber. However, you can take the calibration source out of the port on the integrating sphere and block the port to take the dark. Alternatively, you can slide an opaque material in the filter slot on the front of the light source to block the light coming out of the LS-1-CAL-INT
I have a problem for the calibration. I don't know where you've found the document of calibration you've just loaded at 3:59.
"blocking the path of a light source" ..which way? I can't switch off calibration standard or disconnect fibre optic, right?