The last PentaScanner left the factory back on March 31, 2004. We regret to say support ended March 31, 2008. It's replaced by the Versiv familly of testers
It is not in the SETUP menus. Once you have completed your reference measurement, press AUTOTEST. You will then be presented with the following screen.
Press ENTER to change the number. Once done, press key 1 to run the Autotest.