We are currently having a new office fitted out. It will include a 2P+E 32A socket (Gewiss Interlock Socket 32A 230V 2P+E - https://www.eleconline.co.uk/zdriverel/form/catsel/INDUSTRIAL-PLUG/SKTS/product/M1643) for our UPS. I want to run my own tests in advance of moving in, to be completely sure that the socket and power to it are all fine. What is a good way to do this? I've seen this Socket & See SOK40/16HD 230V Industrial Socket Tester - Socket Testers - Electrical - http://www.test4less.co.uk/socket-amp-see-sok40-16hd-230v-industrial-socket-tester.html but I don't know how thoroughly it tests the power supply. Is there anything better?