The SWIS20 Steering Wheel Instrument System Operating Manual
Contents
1. Clearing the Fastest Lap and Preparing the Performance Monitor for a Different Circuit Turn On ignition with any button held pressed The display will change to Release the button and the display will change to show your fastest lap Fastest Time of the Day As soon as this display appears press any button and the display will change to Now you have successfully cleared the fastest lap and told the system to clear the perfor mance monitor memory DO NOT trigger false laps with the beacon before going out on your first lap of a new circuit You should do this every time you start a ses sion at a different track To Clear the Lap Number Press both top buttons for 3 seconds To Clear the Elapsed Time Press both bottom buttons for 3 seconds Displaying Your Fastest Lap Use the top or bottom right hand buttons to scroll the Gauge window beyond Oil Pressure so that the display shows Recalling Your Lap Times Enter Recall Mode by pressing both right hand buttons together The display changes to Showing the last lap was lap 14 with a lap time of 1 26 04 Use the right hand buttons to se lect the maximum temperatures and minimum pressures in this lap Here the minimum oil pressure was 68 psi Use the left hand buttons to scroll backwards and forwards through the lap time memory Press both right hand buttons again to exit Recall Mode2. Page 17 The Lap Time may be displayed in the large Lap Time RPM window or alter natively in the centre bottom window in place of elapsed time See Set UP for details If the IN channel has been set up correctly your car can be called into the pits by switching the beacon to the IN position The word Pits is shown flashing in the Lap Time RPM window 4 12 Recall Mode If the right hand buttons are pressed together for 3 seconds Recall Mode is entered The last lap time is shown in the Lap Time RPM window together with the lap number in the Lap window The right hand buttons may be used to select a gauge The gauge reading is the minimum or maximum for that lap Minimum pressures and maximum temperatures are recorded Use the left hand buttons to scroll through the laps retained in memory Pressing both right hand buttons together for 3 seconds causes the system to exit Recall Mode 4 13 Best Lap Ftd The best smallest lap time is stored and can be displayed by using the right hand buttons to scroll up to the point where Ftd fastest time of the day is shown in the gauge window The best lap is shown also during the power up sequence and can be cleared by pressing any button at the next point in the sequence 4 14 Displaying RPM As an option available in Set Up the Lap Time RPM window can be made to show RPM rather than lap time If this option is selected then the lap time is shown in the elapsed time window a
3. To Enter Set Up Mode Press both left hand buttons together and the display changes to The left hand buttons select the item to be set up and the right hand buttons change the set ting of the item Press both left hand buttons again to exit Set Up Mode FARRINGDON The SWIS20 Steering Wheel Instrument System Operating Manual Revision 1 Contents 1 Introduction 2 The Buttons and Display Windows Page 2 2 1 The Buttons 2 2 The Display Windows 2 2 1 The Gear Window 2 2 2 The Laps Window 2 2 3 The Lap Time Window 2 2 3 1 The Performance Monitor Option 2 2 4 The Speed Window 2 2 5 The Elapsed Time Window 2 2 6 The Gauge Window Set Up Mode 3 1 General 3 2 Function 0 Tachometer and Other Displays 3 3 Function 1 Set Defaults 3 4 Function 2 Session Number 3 5 Function 3 Hold Time 3 6 Function 4 Blank Time 3 7 Function 5 Infra Red Channel Number 3 8 Function 6 IN Channel 3 9 Function 7 Performance Monitor Display 3 10 Function 8 Display Performance in Elapsed Time Window 3 11 Function 9 Elapsed Time Units 3 12 Function 10 Number of Wheel Pulses 3 13 Function 11 Wheel Circumference 3 14 Function 12 Wheel Turns per Sample 3 15 Function 13 Sample Period 3 16 Function 14 Start Logging Trigger 3 17 Function 15 Number of Tach Pulses per Two Turns 3 18 Function 16 Tacho Filter 3 19 Function 17 Tacho Pulse Polarity 3 20 Fuel and Other Alarm Limits 3 21 Shift Light Set Up 3 22 Gear I
4. The files are numbered sequentially from 1 to 999 This number will not reset unless the non volatile memory becomes corrupted in which case everything is set to the default state and the file number is set to 0 The files have a created and last modified date and time these are the dates and times at which logging starts and ends The files are read only and cannot be deleted When the card is full you must re format it with Podium Flash If you are logging at a sample period of 100 milliseconds a single 512M byte SD card will last you at least a season so you may wish to keep this and buy a new one at the start of the next season There are SD cards and SD cards If you use less than the best you may not to be able to sample data fast enough and the data will be corrupted Also you will need to format the card with Podium Flash before you use it Podium Flash will write a setup file to the card at the end of the formatting procedure and it is sensible to check the setup before using a new card Warning the data logger continues to write data to the SD card until the power to the data logger and steering wheel is switched off The logger then requires some time to write data held in buffer memories to the card and to complete the file Do not remove the card before at least 4 seconds has elapsed after the power has been switched off In order for the system to complete a file the back up battery in the data logger enclosure must be char
5. or pot reading 27 Gr6 Gear 6 mph 5000 rpm or pot reading 28 Grn Potentiometer reading for neutral 29 Grr Potentiometer reading for reverse Monitor Mode 30 Xg Displays value read from x G sensor 31 Yg Displays value read from y G sensor 32 Usr1 8 Displays value read from User 1 8 Input 33 Gear Displays Gear potentiometer reading 34 CL Clears Memories Set to 1 to clear tell tale Set to 2 to Clear Lap End Memory Set to 128 to Clear Odometer To clear more than one item enter sum of codes E g to everything enter 131 1 2 128 Page 9 3 2 Tachometer and Other Display Options The tachometer option is the first to be accessed so that the Lap Timer may be switched off and replaced by a digital tachometer Set to On to display RPM This is followed by options for the Speed Gauge 2 window The hint shown in the Elapsed Lap Time window are as follows SPd Speed OilP Oil Pressure Cool Water Temperature or CHT OilT Oil temperature FuP Fuel Pressure or level 3 3 Set Defaults Setting this Function to On sets all functions back to the factory settings Set to yes then leave set up mode by pressing both left hand keys 3 4 Session Number The session number is stored with lap times and data It is incremented every time the beacon is seen on the out lap but can be set manually with this function 3 5 Hold Time The Hold Time is the time in seconds that the lap time is frozen in
6. 2 2 3 The Lap Time RPM Window Lap Time window is used for Lap Time A quick set up change can be made to display RPM in this window where cars are being driven on the road see section 3 2 The odometer reading and best lap time are displayed here on power on If any gauge reading passes the limit set in Set Up Mode an Alarm flashes in this window Because 7 segment displays are used there is a limited set of letters that can be shown so the alarm for Oil Pressure is Oil for Water Temperature or Oil Temperature it is Hot and for Fuel Level or Pressure the alarm is Fuel Page 5 No oil pressure warning is given unless the engine is running If the Hold Time is set to 0 and the car is not moving warnings are given by flashing the gauge window Scrolling past Oil Pressure gives the following displays Lap Time Window Gauge Window Best lap Time Ftd Engine Speed RPM tac Battery Voltage bat User 1 input US1 2 2 3 1 The Performance Monitor Option If the Performance Monitor is switched on then after the Hold Time has ex pired see Section 5 the Lap Time Window shows the difference in time into the lap between the current and best laps as a time prefixed with a or sign 2 2 4 The Speed Gauge 2 Window Shows the Speed in MPH or KPH Speed can be shown only over a mini mum value that will depend on the wheel circumference and the number of wheel pulses detected in a full wheel revolution Alternatively this w
7. a sample period of 2 milliseconds At this rate you should be able to see frequencies of 100 HZ 3 16 Start Logging Trigger Enter the code as follows 0 never 1 when ever power is applied 2 when a speed of 40 mph is reached and 3 when the engine has started We recommend the latter as it gives important diagnostic data while the en gine is being warmed up Data logging stops when power is removed 3 17 Number of Tachometer Pulses for Two Revs Of the Engine The number entered depends on your ignition system If electronic ignition is used then there will probably be a tacho pulse output If not it may be nec essary to purchase an HT sensor which clips on to a plug lead which will produce just one pulse per two turns for a 4 stroke engine 3 18 Tacho Filter Often pulses from the ignition system are noisy and have to be filtered to give reliable tacho readings This function sets the minimum pulse widths that are counted as tacho pulses The units are in microseconds plus 50 Set this to 100 as a start 3 19 Tach Pulse Polarity This is set to positive by default Positive Polarity ON 3 20 Fuel and Other Alarm Limits It is recommended that you not change the default settings for the alarm limits for fuel oil temperature and pressure and water temperature these have been specified by the Radical factory 3 21 Shift Light Set Up The shift lights are set up following the alarm limits Set the value to the RPM 100 at whic
8. d and the serial numbers of the steer ing wheel itself in the Speed Gauge 2 window the serial number of the data logger in the lap time RPM window and the software revision in the gear window are displayed If no button is pressed while the serial numbers are displayed the remainder of the power up sequence is skipped If any button is pressed the odometer reading is shown next 4 1 Odometer The odometer total distance travelled is displayed when the steering wheel powers up It can be cleared back to zero by using function 34 in the set up procedure It shows the total number of whole miles or kilometres travelled since it was last reset 4 2 Gear The gear window shows the gear selected If the gear is calculated from engine RPM and road speed remember that it can only show the correct gear after you have released the clutch It cannot show you that you are about to select the wrong gear Further it will not show the gear until the car is travelling fast enough to obtain a valid speed On the other hand if the gear signal comes from a sensor in the gearbox then this will show the gear when the car is stationary and at all other times 4 3 RPM and Shift Lights Experiment with the shift light settings to find the most easily read arrange ment You may find that the lights should be set to light at small intervals 200 rpm or so at the top of the RPM range to allow you to gauge the rate at which the RPM is approaching the
9. d to either end of the track For active pressure sensors such as those used for brake pressure connect the 5 volts and ground to the specified wires and the output to pin 2 These sensors give an output ranging from 0 5 volts to 4 5 volts DO NOT use the chassis as a ground connection for any sensor Connect any screen to the ground pin Lamda sensors usually require 12 volts to supply the heater and the interface box but the output is usually from 0 to 5 volts Be careful with the ground wires do not use the ground in the Mini Sureseal connect or as the return for the heater supply Refer to the Podium Flash manual to see how to set the data analysis soft ware to adjust the scale and offset of the sensors Page 20 2 2 The Display Windows There are six display windows Starting from the top left the windows are Gear Laps Lap Time RPM Speed Gauge 2 Elapsed Lap Time Gauge 1 2 2 1 The Gear Window Shows the current gear if it can otherwise this window is blank If there is a connection to the Gear Box then a number 0 or n indicates Neutral If there is not gear output from the gear box then the overall gear ratios in MPH or KPH per 5000 rpm must be entered in Set Up Mode see Section 3 22 2 2 2 The Laps Window This window the number of times the car has passed the Beacon Note that this may not be the lap number in a race The lap number can be reset to 0 by pressing both top buttons for about 3 seconds
10. eft hand buttons for about 2 seconds The display will change and show SetuP in the Lap Time Window and for a moment shows what the three bottom windows will contain The Speed Window will display the Function Number the Elapsed Time Window will show a hint at what function has been selected as far as possible with the 7 segment displays and the Gauge Window will show the value of the func tion This value can be changed with the right hand buttons For Example Function 2 is the Hold Time the time the lap time should be frozen in the Lap Time Window after passing the beacon When setting up this time the Speed Window will display 2 the Elapsed Time Window will display Hold and the Gauge Window will display the time set Pressing the top right hand button will increase the time and pressing the bottom right hand button will decrease it Some Functions are On or Off These are changed by pressing the top right hand button for On and the bottom right hand button for Off Once all the changes have been made the Set Up Mode can be left by pressing both left hand buttons together for about 3 seconds A table listing the various parameters to set up is shown below Once you have used it a few times you will find that the hints are enough to guide you through the Set Up process Page 7 Function Hint in Function Description Default Number Elapsed Value Time Windo
11. emember to clear the best lap when you visit a different track 3 10 Display Performance Monitor in Elapsed Time Window Set this to ON to display the Performance Monitor in the Elapsed Time Win dow No sign is shown but a sign is displayed when you are faster than your best lap 3 11 Elapsed Time Units Elapsed Time can be measured in minutes and seconds or hours and minutes The latter is useful for endurance races 3 12 Number of Wheel Pulses per Turn Enter the number of pulses the wheel sensor will generate for each tuen of the wheel the number of targets 3 13 Wheel Circumference Enter the wheel circumference in centimetres The circumference is best measured by marking the tyre on the wheel to which the sensor is attached and rotating it at least twice measuring the distance covered and dividing by the number of times the wheel was turned To show the speed in KPH divide the circumference by 1 6 and enter this value 3 14 Wheel Turns per Sample The Performance Monitor if fitted will calculate the number of wheel turns counted between sampling the time from beacon This function displays the result Do not change Page 11 3 15 Sample Period Enter the sample time you want to use A good figure for comparing driving style would be 100 msecs If you have suspension potentiometers on the User channels you may wish to sample much faster The maximum sam pling speed is 500 samples per second for this enter
12. er When the engine is not running an oil pres sure warning can be turned off in the normal way by pressing either right hand button but when the engine is running this alarm cannot be turned off The alarm given in the Lap time RPM window is a flashing OiL 4 7 Water Temperature Water temperature is the second highest priority Its alarm can be turned off at any time The alarm is displayed in the Lap Time RPM window as Hot 4 8 Oil Temperature Oil Temperature is the third highest priority Its alarm is also Hot but the gauge LED will be light next to the Oil Temp legend 4 9 Fuel Fuel level or pressure is the lowest priority and its alarm is Fuel 4 10 Battery Voltage Battery voltage can be displayed in the Lap Time RPM window by pressing the top right hand button until Bat is shown in the gauge window There is no warning for battery voltage 4 11 The Lap Timer When switched on the steering wheel enters its power up sequence before reaching its normal state The lap time starts at 00 00 00 and increments continuously until it sees the beacon for the first time The lap time is then frozen for the hold time The hold time is adjustable in Set Up The num ber of laps completed is shown in the two digit lap window The number rolls over from 99 to 0 Page 15 4 Using the SWIS20 When power is applied the steering wheel first displays all segments all numbers are 8s They are then cleare
13. ference in centimetres 3 23 Monitoring Inputs in Set Up Mode A very useful Monitoring Mode is available in Set Up Functions 30 to 33 read out the values of each axis from the Accelerometer all 8 User Channels and the gear pot Use the values to check the working of any sensors you have connected to the User Channels and to check the accelerometer The figures displayed are the outputs of the system ADC and range from 1023 for an input of 5 volts the maximum and 0 for ground voltage The display wraps round after 999 so 1024 reads as 23 3 24 Clearing System Memories Function 30 allows three memories to be cleared Setting the function to 1 will clear the tell tale reading setting it to 2 will clear the Lap End memory and setting it to 128 will clear the Odometer To clear more than one at a time simply add the values together For example to clear the tell tale and the Lap End memory enter 3 Page 13
14. ged If you are having trouble writing files to the card try leaving power connected to the data logger for an hour or so Page 18 2 2 6 The Gauge 1 Window The gauge 1 window shows the value of the selected Temperature Pressure or Level as selected by the right hand buttons Scrolling past Oil Pressure cause other measurements to be shown in the Lap Time Window and an appropriate label in the Gauge Window such as tac Ftd bat or US1 See Section 2 2 3 4 3 Set Up 3 1 General The system may be set up either from your laptop or through the buttons on the steering wheel The set up state is held in memory in the control box and on the SD card If the SD card is in the control box then the setup is taken from this If you change the setup with the SD card in the control box the setup on the card is changed as well To set up the system using your laptop start the data analysis program Podium Flash supplied with the system and click on the top menu SETUP Insert the SD card into the laptop the Sandisk cards supplied fold in half to reveal a connector that plugs into your laptop s USB sockets Now click on Logger and the set up pages are displayed Change the setup to suit your requirements and click OK Wait for a few seconds for the setup file to be written to the card Remove the card and insert in in the control box When the system is switched on the new setup will be copied to the system To enter Set Up Mode press both l
15. h you want the LED to light You can set more than one light to the same value so that for example the top three bright LEDs can be set up to come on at the same RPM Page 12 3 22 Gear Indicator Set Up There are three items to be set up for the gear indicator to work correctly If there is an analogue output from the gearbox usually a potentiometer then set function 20 to ON Connect the potentiometer across the 5V and Ground outputs Use Function 33 to monitor the values for each gear and enter these in Functions 22 to 29 If there is not direct output from the gearbox then the gear ratios have to be entered in set up mode so that the system can deduce the gear the car is us ing The ratios are expressed as miles per hour per 5000 rpm If you have chosen to use KPH by dividing the wheel circumference by 1 6 then enter the ratios as KPH per 5000 RPM If the gearbox is a sequential type then there may be a neutral switch In this case the switch must go to ground when in neutral and Function 17 should be set to ON The display will show a blank if the engine or car is not running fast enough but will show 0 only when the neu tral switch is actuated Use the following equation or a gear ratio chart to calculate these figures circumference x Gear Ratio x Final Drive Ratio x 1 863 mph 5000 rpm Or circumference x Gear Ratio x Final Drive Ratio x 3 kph 5000 rpm Where circumference is the wheel sensor wheel circum
16. ho Pulse Polarity Positive ON Page 8 stored in memory every few metres along the track After the hold time has expired the lap time window then displays the difference between the time at this point on the circuit for this lap and the time for the best lap This differ ence is recalculated every few meters and the display updated If the lap time is displayed in the upper large window the time difference is prefixed with a or sign If it is displayed in the centre bottom window a negative sign only is available To use the Performance Monitor set function 7 Perf to ON Make sure that you clear the best lap at the start of the ses sion and do not switch off the system before starting your out lap 5 Data Logging Data logging in the SWIS20 is completely different from previous Farringdon systems Data is logged against time that is every so many milliseconds all the channels are read and the results stored on the SD card The data collected for each sample is as follows Time into lap time from beacon Speed RPM Oil Pressure Water Temperature Oil Temperature Fuel Level or Pressure Battery Voltage Lateral G Axial G Data Logger Temperature User 1 User 2 User 8 In addition at the end of each lap the following data is collected and stored on the card Lap Time Lap Number Session Number Minimum Oil Pressure Maximum Water Temperature Maximum Oil Temperature Minimum Fuel Level or Pressure
17. indow can display a gauge reading If a gauge reading is displayed here speed can be shown by holding the top left hand button down for 3 seconds The speed is then shown alternately with the letters SPd to remind you that speed is being displayed This is designed for pit lane use and window can be returned to the gauge reading by pressing the bottom left hand button 2 2 5 The Elapsed Lap Time Window If lap times are shown in the lap time rpm window then elapsed time from power on is shown in this window Pressing both bottom buttons for about 3 seconds will clear this time It is used to show time into a qualifying session or an endurance race or driver session If RPM is shown in the Lap Time RPM window then this window shows lap time but only the seconds For example a lap time of 1 minute 2 38 se conds will be displayed as 2 38 If the Hold Time is set to 0 and the Performance Monitor is on the Perfor mance Monitor is shown in this window Page 6 to charge the battery If the battery is not charged the real time clock and calendar will not be able to maintain the data and time 6 Data Analysis Data analysis is provided by PC software package supplied by PolyLogic called Podium Flash To look at the data collected simply remove the SD card and plug it into your lap top Instructions for the lap top software are supplied with the CD ROM Plots such as the one shown above can be displayed using the Podium Flash Data A
18. ke care where the beacon is positioned 8 2 Beacon Conflicts From the explanation given in the previous section it is clear that reliable operation can only be guaranteed when the beacon is sited away from all others A distance of 5 metres along the pit wall is probably safe The Lap Timer will ignore all infra red signals on the same carrier frequency that do not contain the Main Channel or IN codes saved in its memory but if you find that lap times are obviously incorrect look for another Beacon using your channel on the pit wall With only four channels to choose from it may be that more than four teams are using Beacons at the same track In this case agree to use a single beacon and set all the Lap Timers to respond to this channel It is especially important to site the Beacon away from other beacons using large external batteries and having a large array of LEDs pointing over the track These probably emit very strong IR signals which will saturate your Lap Timer Page 21 7 Connecting Other Sensors Other sensors can be connected to the system through the User Chan nels The loom has several up to a maximum of eight user channel three pin Mini Sureseal sockets The pin designations are all the same and are as follows Pin 1 Ground Pin 2 Sensor signal Pin 3 5 volts The Sensor signal must range from ground to a maximum of 5 volts For potentiometers simply connect the wiper to the signal pin and 5 volts and groun
19. nalysis package fuap Explorer os1024a SKEE z q A reso i aN NW Stet Fa rt 250 Sherstone Natonal 4 uN ra Lr ST oauza F A A Lao 11298 A i f tama 10765 wag Lap 001 04 1 08 13 Lap 001 05 1 06 65 F f B Lap ones 105 66 a peed V m B Lap 001 07 1 0465 AL A Lap 001 08 1 05 97 Lap 001 10 in Lap Lapse 10465 tap aa 10463 5 Lap 003 04 1 0460 Lap 003 05 in Lap LETT no a Lap o e 10502 sor Values Ei e00 an 000 m o 2 300 zo ma T i500 D oo en 2500 C naes T creut Map Ti Reference Lap AN0A Lao A7 0465 E Corrent Lap 1810243 Lap 0E 1 05 97 Page 19 Minimum Battery Voltage Maximum RPM for the lap User 1 reading at the beacon User 2 reading at the beacon User 8 reading at the beacon To use the data logging you must set up the tacho pulses the wheel puls es and circumference and you must decide on the rate at which you want to record data and what criterion should be used to start logging These parameters can be set up on the steering wheel or from Podium Flash the data analysis software You should set the real time clock in the data logger so that you know when the data was recorded The clock can only be set through Podium Flash First make sure that the clock on your PC is correct then in the setup dialogue tick the Set Time check box About the files recorded on the SD card
20. ndicator Set Up 3 23 Monitoring Inputs in Set Up Mode 3 24 Function 33 Clear Function Using the SWIS20 System 4 1 Odometer 4 2 Gear 4 3 RPM and Shift Lights The SWIS10 R Steering Wheel This window always shows lap number the fastest lap time battery voltage and the user 1 channel can be displayed You can set this to show RPM or lap time only Using the right hand buttons here The Lap Time Window shows lap time the performance monitor and warnings Gear can be calculated not very satisfactory or can come from gear position sensor Use the right hand buttons to change the gauge reading in this window Scrolling beyond Oil P gives Fastest Lap then RPM then Battery voltage then the User 1 Channel before flipping back to Fuel conds only lap time or the performance The Elapsed Time is useful during quali monitor fying or endurance races However this window can be changed to show se If speed is not shown here normally it can be shown by pressing the top left hand button for 3 se useful for the pit lane The original display can be restored by pressing the bottom left hand The Speed window can display speed oil pres sure water temperature or oil temperature button conds 8 3 Aligning The Beacon and IR Detector The Beacon Beam diverges at 40 degrees and the IR Detector acceptance cone angle is about 15 degrees Ensure that the IR Detector will fall within the Beacon s beam and ju
21. oth right hand buttons After holding both left hand buttons for about 3 seconds the set up mode is entered See Section 3 After holding both right hand but tons for about 3 seconds Recall Mode is entered See section 5 2 Page 4 8 Beacon Setting and Siting 8 1 Understanding Infra Red Communications Infra red light IR from light emitting diodes LEDs can be turned on and off very quickly and it is this property that makes infra red ideal for short range communications To increase the sensitivity of the receivers a carrier frequency is used to turn on and off the LED The receiver can then look for light that is being modulated at this frequency amongst other background light To impose information on the infra red beam this carrier frequency is itself turned on and off There are two ways in which this form of communication can be interrupted first by any light source strong enough to saturate the receiver for example the sun or another more powerful IR source and second other transmissions using the same carrier frequency The reason for the recessed lens and photodiode in the IR detector is to shield it from direct sunlight so providing the IR detector will not see the setting sun behind the beacon it will not be saturated by the sun However some other lap timer and data logging systems do use the same carrier frequency and others use much more powerful IR beams and it is for this reason that you must ta
22. s seconds After reaching 59 99 the display rolls over to 0 00 Although the minutes are not shown this display is adequate for lap timing 4 15 The Performance Monitor Option The Performance Monitor provides the unfair advantage that every driver is looking for Further if you are prepared to entrust you car to someone who you know will drive faster than you the Performance Monitor becomes a very powerful training aid The system works as follows The best lap must be cleared at the start of a session at a new circuit Dur ing the first complete lap and on all subsequent laps the time into the lap is Page 16 Function Hint in Function Decription Default Number Elapsed Value Time Window 18 Fun Fuel Sensor Output Inverted OFF 19 Fud Fuel Sensor Delay Delays fuel alarm for 10 seconds OFF so that fuel alarm is not triggered by cornering AL Lim Alarm Limit for Oil Temperature 110 AL Lim Alarm Limit for Water Temperature degrees C 95 AL Lim Oil Pressure Alarm Limit psi 20 tac LedS Shift Light Settings Green LED 1 to Red LED 9 rpm x 10 to 90 100 20 G ip Electrical Gear Input Connected OFF 21 N ip Neutral Switch Input Connected OFF 22 Gr 1 Gear 1 mph 5000 rpm or pot reading 23 Gr 2 Gear2 mph 5000 rpm or pot reading 24 Gr 3 Gear 3 mph 5000 rpm or pot reading 25 Gr 4 Gear 4 mph 5000 rpm or pot reading 26 Gr 5 Gear 5 mph 5000 rpm
23. shift point 4 4 Speed Speed can be shown all the time or on demand in the in the Speed Gauge 2 window see Set Up The speed is calculated from the time between the pulses coming from the wheel sensor Because this timer can measure only small times speed cannot be shown until some minimum value is reached This value depends on the number of pulses per wheel turn from the wheel sensor and the diameter of the wheel Typically the lowest speed that can be displayed is between 10 and 30 mph If the Speed Gauge 2 window is displaying another gauge then pressing the top left hand button for about 2 seconds causes the Speed Gauge 2 window to show speed This function has been added to monitor your speed in the Page 14 3 8 IN Channel Number All Farringdon Beacons come with an channel number from 1 to 250 Set this channel number to that of your beacon This is most easily done by pointing the beacon switched to IN at the IR Detector while at this point in the set up procedure The Gauge Window will show the channel number detected 3 9 Performance Monitor Display The Performance Monitor shows the time difference in the Lap Time Window between the time to the current point on the track and the time taken in the Best Lap to reach the same point It is shown only after the Hold Time has expired If you turn this display ON then the data logging must be ON so setting this function ON also sets the Data Logging function ON R
24. st as important be sure that the acceptance cone of the IR Detector includes the Beacon when the car passes it IR Detector not aligned correctly IR Detector rotated and aligned correctly Farringdon Instruments Limited Unit 9 Oriel Court Omega Park ALTON Hampshire GU34 2YT Telephone 01420 541591 Facsimile 01420 587212 www farringdininstruments co uk Page 22 4 15 Speed Elapsed Time Oil Pressure Water Temperature Oil Temperature Fuel Battery Voltage The Lap Timer Recall Mode Best Lap Ftd Displaying RPM The Performance Monitor Option Data Logging Data Analysis Connecting Other Sensors Beacon Settings and Siting 8 1 8 2 8 3 Understanding Infra Red Communications Aligning the Beacon and Detector Beacon Conflicts Page 3 1 Introduction Thank you for choosing the Farringdon SWIS20 Steering Wheel Instrument System This manual will describe how to use and set up system in your car Of course the system will not work properly until it has been loaded with all the essential information about your car for example the circumference of the wheel So please take a little time to ensure that you know how to set up the system before you use it for the first time 2 The Controls and What is Displayed The Steering Wheel Instrument System has four buttons and six display windows This section explains how to use the buttons and what is displayed in the windows 2 1 The Buttons Each side of
25. the Instrument Cluster there is a double membrane push but ton These buttons will click when pressed and give an over centre feel They are deliberately stiff and will not respond to very short pushes This prevents them being pressed accidentally or operated by vibration While driving the left hand buttons will control the brightness of the display and the right hand buttons select the gauge that is displayed in the gauge window as follows Pressing the top left button increases the brightness one step Pressing the bottom left hand button decreases the brightness one step There are 10 steps in all If the LED next to the Oil P legend is lit the oil pressure in psi is shown in the gauge window Pressing the bottom right hand button causes the LED next to the Water legend to light and the water temperature in degrees centi grade is shown in the gauge window Pressing the top right hand button switches the display back to Oil Pressure In this way the right hand buttons scroll through the gauges Pressing both top buttons for about 3 seconds clears the lap count This is often necessary on the starting grid after passing the lap timing beacon dur ing the parade and warm up laps Pressing both bottom buttons for about 3 seconds clears the elapsed time This may be done at the start of a qualifying session or the start of an endur ance race or session The remaining combinations are pressing both left hand buttons or b
26. the Lap Time Window after passing the beacon Set this to be long enough for you to reach a suitable place on the track to glance down and read it Setting the Hold Time to 0 changes three aspects of the display First the lap time remains displayed throughout the lap second the Performance Meter is shown in the Elapsed Time window and third gauge warnings are signified by a flashing gauge window until the car is moving 3 6 Blank Time This is the time that the Infra Red Detector ignores all signals after seeing its beacon 10 seconds is a good time to use but it can be extended to blank out other beacons placed around the track in order to generate segment times on some other systems 3 7 Infra Red Channel Number Set this to the channel number you are going to use If you wish to use the PI Beacons on most UK circuits and you have a dual channel IR Detector then set the channel number to 0 Page 10 pit lane To confirm that speed is being displayed the speed is shown alter nating with the text SPd To clear the speed display press the bottom left hand button 4 5 Elapsed Time The elapsed time is displayed in the bottom centre window and can be reset to zero by pressing both bottom buttons for a second or two The units are normally minutes and seconds but can be changed to hours and minutes in Set Up 4 6 Oil Pressure Oil pressure is the measurement of the highest priority and an oil pressure warning will overrule any oth
27. w 0 Tach Display tachometer in Lap Time Window OFF SPd Display Speed in the Speed Gauge 2 Window OFF OilP Display Oil Pressure in the Speed Gauge 2 OFF Cool Display Water Temp in the Speed Gauge 2 OFF OilT Display Oil Temp in Speed Gauge 2 Window OFF Fu P Display Fuel Pressure or level in S Gauge 2 OFF 1 def Set Everything to Default Values OFF 2 SESS Session Number this automatically increases every time 0 the system is turned on 3 Hold Hold Time in seconds Time that the Lap Time is frozen 30 after passing the beacon 4 blnc Blank Time in seconds Time that the IR receiver ignores 10 any other input after seeing its beacon 5 IrCh Channel Number for IR Detector Choose 0 to receive PI 1 beacon at UK Tracks 6 InCh IN Channel Number Set this to IN code of beacon 100 7 PerF Performance Monitor Display ON or OFF OFF 8 Here Display Performance in Elapsed Time Window OFF 9 Hour Elapsed Time in Hours and Minutes normally in Minutes OFF and Seconds 10 PPt Pulses per Turn from Wheel Sensor 2 11 Circ Wheel Circumference in centimetres 180 12 tps Turns per Sample Number of wheel turns between PM 2 sample DO NOT CHANGE 13 Per Sample Period in milliseconds 100 14 Strt Start Data Logging Trigger 0 never 1 when powered on 2 when engine started and 3 when min speed reached Logging stops when power is turned off 15 tach Number of Pulses per Two Engine Revolutions 4 16 Filt Tacho Pulse Filter units are usecs 50 100 17 POSP Tac
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