A metering valve for dispensing fluid, the metering valve having a valve body, a metering chamber, and a valve member that is slidable in the valve body so as to dispense the fluid contained in the metering chamber. The electrical connector includes a casing, an insulative housing disposed inside the casing. A novel method is provided to align the non-collimated beam emitted from the standard low cost laser diode module so that it is perpendicular to the rotational axis of the laser level. The protocol alteration information displaying unit displays the protocol alteration information.