Gw instek gdm 8246 digital multimeter gw instek gdm 8246 rs232c p the gw instek gdm 8246 bench top dmm is equipped with a rich set of features it offers a 50 000 count meter with large dual 7 segment led displays the display of the gdm 8246 is capable of showing two electrical characteristics at once acv plus frequency or dbm dcv plus dbm or acv ripple the gdm 8246 carries an extensive list of measurement items dc voltage current ac voltage current with true rms resistance ca