Benno, Many thanks for your response. I concur mains voltage is dangerous. Fortunately I am a qualified electrician and have full respect for 230V. There are specific power quality testers available. However these range in the 5K-10K range and sampling speed would not capture the switchover. Thanks ...

Hi, I am currently involved with performance testing of a Static Transfer Switch (STS). These STSs have two mains (230V) inputs. When the primary source fails, the scondary fed should be switched to the output within 10ms. I am exploring if a Picotech oscilloscope can be used to capture the data dur...