Today’s review will be on the Fieldpiece SC640 Digital Clamp Meter. Fieldpiece is one of the leaders in designing and releasing tools for the HVAC industry. In fact, they exclusively make testing equipment for the HVAC Industry. The Fieldpiece SC640 is a brand new meter from Fieldpiece and it complies with new UL Safety Standards that are coming out. What this means is you can no longer have the test leads and the thermocouple plugged in at the same time. This was done to safeguard against accidental electrocution to you, the user.