New to forum. Looking for Sun Tester info

I recently acquired a SUN Infrared Performance Tester, and was wondering if anyone had any manuals that might go along with it. The accessories all seem to be there (as best I can tell), but having something to reference before I plug it in and turn it on would be good.

This is one of the large setups, with a scope in the middle, and 4 gauges on either side of the scope.

Thanks for whatever help you can provide.