I started trying lead free soldering. I'm putting in some 14 and 16 pin dip sockets on a general purpose prototype board. I went to measure my connections with an ohmmeter to check for solder bridges, etc. The meter reads zero ohms for connections when measured from the top of the board thru the socket but an open circuit when measuring the actual solder connection. Apparently when lead free solder rehardens it forms an electrically non conductive surface. Is this normal?
The solder is no longer shiny after melting.
The solder is no longer shiny after melting.