International 2 'S' Pro

Issue 9H

Version Nov 1997
Note new facilities of 'Average speed' and 'Long distance total'
Connect up to the vehicle's power supply as directed by the label on the black power lead coming out of the base of the tripmeter. This is normally Brown to +12 volts and Green/yellow to -12 volts. Connect straight to the vehicle's battery posts via a 2 ampere fuse (not provided with the Brantz) on the live wire. The blue in this cable is not normally used. The sensor is connected to the grey cable coming out of the base of the tripmeter as directed by the separate sheet showing all the possible combinations of sensor and how to fit them. If you are using the universal speedometer cable sensor the grey cable contains a Brown which connects to the sensor brown, Blue goes to blue, and Green goes to green. The remote reset button is permanently cabled to the tripmeter.
The tripmeter is switched on by means of the switch on the base of the meter. The switch is moved from the 0 pressed position to the 1 pressed position. The meter digits will light up when the power is ON. A battery charger is not a suitable source of power to test the tripmeter. If the meter is switched OFF then it should remain switched off for a minimum of three seconds or so.
The remote reset button will zero the lower left hand INTERMEDIATE distance display. The metallic switch on the top right hand of the face of the meter has three positions, and will normally be in the central position. If this switch is moved upwards to the FREEZE position it will stop the top TOTAL display from incrementing. This facility is useful if the competitor wishes to preset the TOTAL distance figure to a certain value which will be reached at a known certain point on the road, or the TOTAL reading is too high and the vehicle needs to travel a distance without the TOTAL being incremented. The downward position of this switch towards the T ZERO position zero's both readouts on the Clubman version of the Brantz International 2 'S' meter and just the top TOTAL readout on the 'Pro' Brantz model. This switch should be operated momentarily after the tripmeter is first switched on. The STEP control to the right of the TOTAL readout is to edit the TOTAL readout value. It is a rotary control which is normally fully anti-clockwise until a 'click' is felt. Turning this control clockwise will cause the TOTAL readout to step itself which enables the competitor to set the TOTAL readout to any figure and is itself governed by the +/- control described below. This facility is useful to align the TOTAL readout value to a value given, say, by the organizer's handbook at a certain point. Note that the STEP over-rides the FREEZE control. The control marked + and - is fitted to the 'Pro' models and allows the tripmeter to count upwards or downwards. (+ is incrementing, or upwards, - is decrementing, downwards).
Speed / Average Speed  
The three digit display on the lower right hand corner of the tripmeter will display the vehicle's current speed to three digits in the units to which the tripmeter is calibrated, i.e. if the tripmeter is calibrated in miles then the speed and average speed will be in miles per hour. If the tripmeter is calibrated in kilometres then the speed and average speed will be in kilometres per hour. Note that the high accuracy of the speedometer is automatically calculated from the distance calibration of the tripmeter and is dependent for accuracy on the accurate calibration of the tripmeter as described later. The three position switch just above the SPEED/AVERAGE SPEED readout should be in the left position marked SPEED to use the readout as a conventional speedometer. In the central position the readout will illuminate the decimal point which indicates that the readout is showing AVERAGE SPEED, and that this average speed has been calculated to one decimal place. Switching from speed to average speed by means of the switch does not interfere with the average speed calculations. The calculation of the average speed commences when the three position switch is momentarily moved to the right position marked ZERO. It is necessary to hold this switch operated for about half a second. The average speed Zero can be used at any time with the vehicle moving or stationary and is independent of the TOTAL and INTERMEDIATE readouts.

The meter is calibrated to be accurate on any vehicle fitted with any type of Brantz sensor and using any wheel size or gearing by means of the three thumbwheel switches marked CALIBRATION. If the meter is to show hundredths of a kilometre then the thumbwheel switches are first set to 100. Find the start of an accurately measured kilometre and momentarily press all the reset (zero) controls. Drive the measured kilometre and stop accurately at the end of the distance. Note the figure which has comes up on both readouts. This is the calibration figure for this particular setup of the vehicle. Enter this figure onto the calibration thumbwheel switches. The accuracy of the meter can be confirmed by turning the vehicle around and traveling back over the measured kilometre. The measured kilometre should be read by the Brantz very accurately as 1.00 kilometre. To calibrate in hundredths of a mile, follow the above calibration procedure exactly, but substitute the word 'mile' for the word 'kilometre'. If several wheel / tyre sizes and gearings are available for the vehicle then repeat the calibration procedure for each combination & note down the different calibration figures. If the rally organizer has laid out an 'official distance' or you wish to make your tripmeter read the same as the rally organizers distances then the following instructions apply: Set your tripmeter to a large figure L, say, 399 to 999 (it may be your normal calibration figure which you know is accurate, but for this purpose, that is academic). Zero the readouts at the start of the organizer's measured distance (say he has given you a distance of 4.56 to the next known point 'P'). Drive to the next known point 'P' and note the figures on the TOTAL and INTERMEDIATE (same figure) readouts 'D'. Divide 'D' by 'P' and multiply the result by 'L'. This will give you the new calibration figure to enter onto the calibration digits to make your tripmeter read the same as the rally organizer's. N.B. your speed and average speed will be calculated from the 'official' distances traveled which should be the figures which have been used by the organizer to calculate the target speeds. Long distance events may require the use of a TOTAL readout showing 999.9 kilometres or miles. Pro tripmeters with 'D' in their serial numbering can shift the decimal point from 99.99 to 999.9 in the following way: Switch off the tripmeter for 3 seconds. Operate the T.ZERO switch and keep it operated whilst the ON/OFF switch is turned ON. The short distance mode is re-installed if the meter is switched OFF. Note that if the tripmeter is to be recalibrated for any reason, then it should be done in the normal 'short distance' mode. Long distance events: Certain of the Brantz 'Pro' models which contain the letter 'D' in their serial number can shift the decimal place of the top TOTAL readout one place to the right so that the TOTAL will indicate 999.9 kilometres or miles which is a useful facility for certain international events. The tripmeter cannot change from one mode to the other after being switched on. On power-up, the tripmeter normally will be in standard mode (99.99) kilometres or miles, but if the T.ZERO switch is held in the downwards (zeroing) position WHILST THE METER IS BEING SWITCHED ON then the long distance mode will be selected. If the meter is switched off again, for two seconds, the normal mode will be reselected. Troubleshooting: See the guarantee form for definition of normal electrical supply, fluid ingress and vibration / impact damage. If a malfunction is observed, firstly connect up the meter to another car to see if the problem is with your car's electrics. Suppliers or manufacturers will be pleased to offer advice about testing for interference (see sensor sheet) or other conditions which will prevent a vehicle from being electronics compatible.


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