There were no user guides or documents received with the SurveyIR Microspectroscopy accessory.
The SurveyIR accessory ships with all documenation and user guides on a USB drive that should be in the box with the accessory. This drive also contains the installation program for the eSpot software.
If the USB drive is missing, contact Czitek for a replacement drive. https://www.czitek.com/