Hello,
This is what it says on the website:
"Ensure the reliability of your scans.
For maximum scanning precision: The new, ultra-precise photolithographic calibration plate ensures optimal scanning results and long-term reliability."
My questions:
1. WHEN or WHY should I use this plate?
and
2. HOW? 
There is no mention of this anywhere in the descriptions and manuals…
Thanks and best regards
Hi @Bifi
You got the plate with your scanner , use it if really needed , don’t do it if not needed .
How you will know when to calibrate your scanner ? The surface of the scans will be more grainy as it should , you have problem with markers being visible while scanning
Just click on the calibration link on the left low corner of the software Home tab, it will show you step by step how to use it proper
Before calibrating the scanner or scanning in laser line mode, it is necessary to warm up the device for 10 minutes to ensure optimal accuracy. Check the scanner’s accuracy before each scan using the Scanner Calibration program on Revo Metro’s Home page to ensure accuracy.
Steps：
①Click “Scanner Calibration” at the bottom left of the software and follow the prompts to proceed.
② Check the accuracy first.
③ If the accuracy check fails, calibrate the scanner according to the on-screen instructions if needed.
Note: To ensure the calibration results, connect your PC to a power supply before starting the calibration.
Super!
Thank you very much PUTV 
In my opinion, this should be included in the description for EVERYONE.
You Welcome Brend,
You can find all documentation in one place
In the menu you will find manuals and documentation for your scanners and software .
The subject of calibration belongs to the software . The software will also guide you through the process step by step.
