Megger dcm340 ac dc clamp multimeter megger 1000 305 the megger dcm340 ac dc clamp multimeter is a highly versatile instrument and ideal for use in the installation maintenance or monitoring of ac dc systems and equipment the dcm340 is safety rated to iec 61010 1 cat iii 600 v and is drop tested to 1 2m onto a hard floor it is supplied with test leads a carry case and a full 1 year manufacturers warranty megger 1000 305 dcm340 current clamp meter