Fluke flk cnx 3000 wireless digital multimeters and kits fluke fluke flk cnx 3000 the fluke cnx 3000 wireless digital multimeter is the heart of the cnx measurement system being able to diplay measurements from connected probes plus measurements from up to 3 wireless modules placed within 20m youll save time collecting multiple measurements with less walking to and fro use as a stand alone measurement tool with multiple modules on three phase systems or combine with other cnx modules for