Brantz rally Instruments

 Installation.

A minimum system for fitting to a road vehicle is the Laser 3 computer plus a distance sensor with its' connectors and fasteners. The computer and sensor should be tested before being fitted to the vehicle as follows: Open the rear connection cover door of the Laser and note the three connection blocks. Take great care not to connect anything to the wrong terminal or damage will occur. The top block is marked 'Fuel Gauge FF’ terminal. Do not connect anything to this yet. The centre block is for the distance sensor only and connections will be made to this later on. The lower block is for the 12 volts power input. Use good quality wire and connect the + terminal of a 12 volt battery to the terminal marked ++12v on the computer. The spring loaded type terminals will allow a stripped end of wire to be pushed into the block if the gripper is depressed with a screwdriver etc. Releasing the gripper will clamp and connect the inserted wire which would preferably be solder 'tinned' to prevent stray strands of wire from moving about. Connect terminal marked 12v-- on the computer to -12volt terminal of a charged battery. For safety, connect computer first, battery last. Pressing the button marked ON should cause the readouts to light up. You can set the clock if you wish, as directed in the instructions later. The clock's backup battery will be charged during the first period of use. Disconnect the computer from the battery. Connect up the distance sensor to the centre terminal block as directed in the sheet for sensors. Re-connect the computer to power and set the four calibration switches to 1000 and turn the computer ON. Spin the sensor internals or if a wheel type sensor is provided, touch the end of the sensor many times with a metallic object such as a screwdriver. The lower readout should increment. The above test shows that the computer and sensor are working ok.

  Brantz rally Instruments