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DigiTools Software User Manual

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1. Version 1 0 Page 12 O ETB Instruments LTD 2007 DigiDash Tools In the Track Analysis section of the pane you can change this for instance to Delta Segments which where you have 2 laps selected shows the difference in times between the 2 laps for each segment allowing clear visual comparison of where on the circuit one lap is better than another Checking the Delta Seg Width check box alters the thickness of the track line in addition to its colour depending on the amount of difference between segment times of the 2 laps for each segment On the upper right corner of the track map pane you can select the Plot Mode Circuit or Sprint Hill Climb In Circuit mode when using G force track mapping Digitools applies error correction to the data to ensure that the 2 ends of the lap meet up If you are logging data from a point to point run i e not a circuit where the 2 ends of the run should meet up selecting hill climb or rally stage will plot the data in its raw uncorrected form To switch to using GPS data for the map use the source pane to the right of the window If using G force mapping only 1 lap is mapped use the Track Map Lap options to select which lap is plotted at any time If using GPS mapping you can use the Options pane to choose to overlay the maps of both laps and whether the second lap should be displayed as a dotted line to allow the 2 laps to be differentiated 9 1 Mini Trac
2. Resize G Long 10 Record Lap to File Data Highlight Record Lap to File S a N Odometer m Start Stop a Rese start Stop Resize Lap Time s rep PTE z M Trackmap Po r Battery G Lat x10 2 Resize Transparent 2 Resize Transparent Lap Analysis Sel Lap Sel Lap IT Tago Lege i Scale 1 vi Frame Count 7706 A Video A amp B Video Log B N yr 799 Selecting an individual lap within the video allows the you to select the track map and plot the vehicle position around that lap A second video file maybe loaded into the Video B section and the same process used for synchronising another data set to the video The videos can then be played together by clicking the play button in the Video A amp B box at the bottom of the video window You can then compare the video from two laps or video sources side by side Pleae note that the processing rquired for some video codecs is very high and MPEG2 is reccomended as the video source file type Version 1 0 Page 30 O ETB Instruments LTD 2007 Di Dash Tools EI View Data File Data View Marker Option Data Select X Axis Data 7 Time y on X Axis MEPEDAP L DD2 Standard Channels Selection 1 rm No Lap Ml Y RPMADO B Speed MPH E Bear x10 Oil psi J Gil degC Video Editing Window A atol Di Play m Stop
3. If you only want to smooth one or a few traces you can select the trace in the drop down list of the Data Smoothing area and click Smooth If you click the Smooth button multiple times more and more smoothing will be applied and progressively more unevenness will be removed from the selected trace As you are removing information from the trace by smoothing to go back to an unsmoothed trace you must reload the file from the file tab Version 1 0 Page 22 O ETB Instruments LTD 2007 DigiDash Tools 10 Changing the X axis The data tab left hand pane gives the option to change the data used for the X axis from the default of time to any one of the main DigiDash Pro data features The obvious alternative to time is distance choosing distance allows 2 laps to be compared so that apart from allowances for different recorded distances for different lines wheelspin or brake lockup each lap is at the same place on the lap for a given point on the X axis So you can see the relative speeds etc for each lap at say the apex of the first corner or see where in one lap the driver is on the brakes at a later point on the circuit rather than just being later on the brakes as he was behind the comparative lap by that point but perhaps actually braking at the same place Another useful option is to plot against revs on the X axis File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map
4. O ETB Instruments LTD 2007 DigiDash Tools 20 APPENDIX 1 Warranty B Limited Warranty ETB Instruments Limited warrants all merchandise against defects in factory workmanship and materials for a period of 12 months from date of purchase This warranty applies to the first retail purchaser and covers only those products exposed to normal use or service Provisions of the warranty shall not apply to an ETB product used for a purpose for which it is not designed or which has been altered in any way that would be detrimental to the performance or life of the product or misapplication misuse negligence or accident On any part or product found to be defective after examination by ETB Instruments Limited ETB Instruments Limited will only repair or replace the merchandise through the original selling dealer or on a direct basis ETB Instruments Limited assumes no responsibility for diagnosis removal and or installation labour loss of vehicle use loss of time inconvenience or any other consequential expenses In the event of merchandise being returned to ETB Instruments Limited The responsibility for payment of delivery rests with the customer The warranties herein are in lieu of any other expressed or implied warranties including any implied warranty of merchantability or fitness and any other obligation on the part of ETB Instruments Limited or selling dealer Your statutory rights as a consumer are not affected Version 1 0 Page 48
5. View Data File Data View Marker Option Pat Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Markers Labels and Statistics Plot View Lap Overlay Data A Race_ 2 LogSession 2 dig FF On Drag from left axis 12017 Marker Options 17 Plot Marker in Plot Window Y Video Data Marker Position Marker Data N I NG y C Set Label Set Text Clearways Clear Last Clear All Load Labels Save Labels Statistics Time Axis Only Stats On All Dat Max 20 30 S Sue C Min Time s C In Window C Avg 7 Press F1 for Function Key Help Stats on RPM Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A Selection 1 Selection 2 SolidLine 2 Visible I Visible C Dotted Line C Points You can set labels on the plotted data to highlight features of a plot for instance if you are printing it out or as reminders Version 1 0 Page 16 O ETB Instruments LTD 2007 DigiDash Tools Labels can consist either of the X and Y coordinates of the marker use Set Label or your own text reminder use Set Text To set a label select either Set Label or Set Text in the Labels area of the Marker Tab then drag the mouse pointer to where you want to place the label If you are using Set Text
6. G Circle Video Overlay Engine Analysis Data Select Plot X Axis Data RPM 100 v on X Axis Pro Prot Extra Ch1 8 C4 gt DD2 Standard Channels Selection 1 T No Lap CL Pm E mm Speed MPH mi Gea 10 gt Y oi ps Oi degC 1 Water degC T Aux psi T Fuel T Battery T Brake TG Lat x10 TG Long x10 1 Odometer m 7 T T I Lap Time fs 70 80 T 30 RPM 100 pa Lez Peel Press F1 for Function Key Help a Sel 1 Log 1 Lap 11 Data A No Lap Selected Solid Line Y Visible T Visible 1 Dotted Line C C Points E The figure above shows oil pressure plotted on the Y vertical axis with RPM on the X axis for a single lap with the oil heated up You can see how oil pressure rises more or less linearly with revs until around 65PSI where the pressure bypass valve limits the pressure regardless of revs Other uses might be to plot airbox pressure against speed etc Version 1 0 Page 23 O ETB Instruments LTD 2007 DigiDash Tools 11 Engine Analysis The engine analysis tab presents a plot of engine power and torque similar to that which you would get from a rolling road session These curves are calculated from the longitudinal G speed and RPM data throughout the data session The maximum power and torque
7. Plot Data Options F1 Help Zoom and Pan gti Full C Zoom Box C Zoom Pan C Pan Axis 1 C Pan Axis 2 C Pan Axis 1 Horiz Only C Pan Axis 2 Horiz Only C Pan All C Pan All Horiz Only Axis Options M Y Axis AutoScale Select r Press F1 for Function Key Help Data Smoothing Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A Solid Li Line Smooth RPM E 2 SolidLine 2 Visible Soli F Visible ci ine C Dotted Line Points 1 Filter when Data Loaded Version 1 0 Page 9 O ETB Instruments LTD 2007 DigiDash Tools 4 Selecting the data features to be plotted Click on the Data tab on the left hand pane IP View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Data Select Plot X Axis Data View Lap Overlay Data A ENSIMA Time on X Axis Pio Prot Extra Ch 1 8 ce gt DD2 Standard Channels Selection 1 r Selection 2 BB PD Gi gt B Speed MPH Mi My Gea x10 L Y Oi ps E x Oi degC Ev E V Water deal ME gt x Au psi My M Fui iv My Battery Wi My Bake Mv Bo Glaxo BIT G Long x10 MA E Odometer m Hv B lT Lap Time s Lap Analysis Sel Lap2 Sel Lap1 zi eae sacate Press F1 for Functio
8. A File race2_LogSession_11 dig Circuit Lap C Sprint Hill Data Set loaded from race2_LogSession_11 dig Grid Style Sample Rate 20 Samples s Data Set B Load Data Set B Data Set B loaded from No Data Sample Rate C Selection 2 Plot Progress Dptions Overlay Tracks Display Prefer Load File Print Plot Print to Device Red Line Lap Selection 2 Slower Print to File bmp Green Line _ Lap Selection 2 Faster is Black Line Equal Segment Time Send to ClipBoard Track Adjust Track analysis Delta Segments Rotate Back to Main Menu Shape M AA EI ve M Delta Seg Width Panxy Zoom Options F1 for Help Menu Control off C Zoom Pan Full Clicking on Overlay Tracks in the Options section of the track map screen removes the delta segment thickness to the plot and shows both lap traces on screen Selecting Selection 2 Dotted Trace allows the 2 laps to be differentiated more easily Version 1 0 Page 36 O ETB Instruments LTD 2007 DigiDash Tools UR View Data Fio Data View Mate Option Pa Daa Lap Times Data A Notes Data B Notes Track Map G Dede Video Overtay Erre Analysis Load and Print Data Data Set A Load Data Set A Data Set A loaded from verel LogSeraon 11 dy Sample Rato 70 Samplos s Data Set D Load Data Set B Data Set B loaded trom No Data Sample Rate 0 Samples s Plot Progress Display Preference
9. Video Overlay Engine Analysis Data Select Plot X Axis Data View Lap Overlay Data A Race 2 LogSession 2 dig Time v onX Axis Prot Extra Ch1 8 C4 andard Channels Selection 1 r Selection 2 mu E npo x I Y Speed MPH TE 1 Gear 10 MI 17 oi psi Hx 0i de90 IS iv Water degC Aux psi E 7 Fuelz O y Iv Battery MI 5 Brake gt Mz 7 Gla x0 EE 7 G Long x10 TE 1 Odometer m x EL Lap Time s La Anayet Gel Lape csal Let Press F1 for Function Key Help mn x1 Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A xis 44 18 at 2 76 SolidLine Y Visible Solid Line V Visible Sel 1 Log 1 Lap 4 Data A Time 53 14 l y Y Odo Slip m C Dotted Line Dotted Line Sel 2 Log 1 Lap 5 Data A Time 53 31 Points C Points TIP You can save your preferences for data trace selection colours etc by going to the File tab and clicking on save file in the Display Preferences section If you save as default cfg in the digidash directory the current settings will be used as default each time you open Digitools You may find it useful to save settings for different types of data analysis for instance systems analysis plotting all plot data for the session and displaying speed oil and water temperature and pressure aux pressure and battery voltage This is useful for seeing how your engine is coping t
10. pressure combined with high revs indicates possible oil starvation or oil surge The pressure plot can be switched between PSI and Bar in the Option tab of the View Data window 19 1 5 Oil Temperature Oil temperature as read by the Digidash oil temperature gauge Note that the position of the temperature sensor in the oil circuit can affect the temperatures logged particularly whether the sensor is before or after the oil cooler or dry sump tank Care should be taken of this issue when comparing temperatures between different cars The temperature plot can be switched between Centigrade and Farenheit in the Option tab of the View Data window 19 1 6 Water Temperature Water temperature as read by the Digidash water temperature gauge Note that the position of the temperature sensor in the water circuit can affect the temperatures logged particularly whether the sensor is before or after the radiator Care should be taken of this issue when comparing temperatures between different Cars The temperature plot can be switched between Centigrade and Farenheit in the Option tab of the View Data window 19 1 7 Aux Pressure Pressure as read by the Digidash auxiliary pressure sensor Typically the Aux pressure sensor may be used to monitor fuel pressure on a fuel injected engine This allows the action of the fuel pump and pressure regulator to be monitored and may help in diagnosing misfires It could also be used to record airbox pressu
11. 2 dig Load Data Set A Sel Session Lap Lap Time s Distance m Avg MPH Seg 1 Seg 2 Seg 3 1 1 57 50 19126 74 84 2 53 44 1940 3 81 69 3 4 5 6 Data Set A loaded from Race_2_LogSession_2 dig 7 1 Sample Rate 20 Samples s 1 1 A 53 35 1939 5 81 80 53 14 1936 0 81 97 19 21 17 00 53 31 1935 1 81 67 19 26 17 17 Data Set B 53 53 19334 81 27 3 Load Data Set B ro Data Set B loaded from Best Sess 1 Lap 4 Time 53 14 at 81 97 MPH Theory 53 09 AvgDist 1935 6 m No Data ata Sample Rate 0 Samples s Plot Progress Display Preferences Load File Save File Print Plot lt gt Print to Device EN Best Sess Lap Time at MPH Theory s Ava Dist m Print to File bmp A A an Select Laps to View and Overlay Lap Time Dormi Further Lap Analysis 7 Selection 1 aee Es Send to ClipBoard ES ot lt Lap Time C Lap Selection 1 Session Log 1 Lap 4 Data A AA Menu Control ogm C Lap Selection 2 Selection 2 Lap Split and Segment Times i F Splil a Back to Main Menu Session Log 1 Lap 5 Data A Eu 2 y Splits Exentos Segment Looking at the segment times we can see that though lap 4 is faster overall lap 5 is half a tenth faster in the first segment To visualise this better go to the track map view and in the track analysis section at the bottom of the menu select delta segments EI View Dat
12. Losses y ngine 12 2 Ca Me Brake x Em GLa 00 Plot Options G Long x10 T Use GPS Speedin Calce Plot Filter High y R Odometer m EIT Lap Time s a 40 RPM Bins 250 RPM gt 60 60 Engine RPM 100 Lap Anane Gel Lap2 Sel Lap1 DataA amp DataB Cursor Information Plot Control Zoom Options F1 for Help ci 6 Of Data A CE RE PE tna eno Zoom Box _Full E S TUT Power BHP EAT IR I Fhheel BHP Som pan ff Torque bt E MM F RPM Histogam C Pan XY The RPM Histogram plot shows the proportion of time spent at each RPM level in the plotted data This is useful for evaluating gearing on a lap and which areas of the power curve are most important to lap time for instance in the plot above it is clear that little time is spent below 7000 RPM so there is little point in trying to increase torque or power below this level As you move the cursor across the engine analysis plot area at the bottom left of the engine analysis tab are the data corresponding to the cursor position power torque RPM as well as estimated flywheel BHP Version 1 0 Page 24 O ETB Instruments LTD 2007 DigiDash Tools The base power calculation is power at the wheels since it is calculated from the
13. Set Label C View C Set Text Put Text Here Clear Last Clear All Load Labels Save Labels EY Statistics Time Axis Only E Stats On A x All Data Max 2 de 30 C In Window Cc Aya net Yg Press F1 for Function Key Help Stats on RPM y Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A RATE Selection1 Selection 2 f Solid Line M Visible T Visible Sel 1 Log 1 Lap 4 Data A Time 53 14 oF Sel 2 Log 1 Lap 5 Data C Dotted Line A Time 53 31 Points In the example above you can see the red and blue markers have both been positioned From the mini track map at the bottom right of the plot area the blue and red dots show where on the circuit the markers have been placed the braking area on the entry to Druids at Brands Hatch Club UK in this case In the main plot area you can see the red and blue cross hairs of the 2 markers corresponding to the highest speed at the end of the straight and the lowest speed at the apex of the corner Looking at the Marker Data area of the left hand pane we can see the blue marker s figures printed in blue showing that it is at 41 94 on the Y axis and 15 72 on the X axis Since we have aligned this marker with speed this indicates that the car was doing 41 94 MPH at the apex and this was 15 72 seconds into the lap Similarly the red marker j
14. display split times the cumulative time to reach each split point in the lap or segment times the time to travel between 2 consecutive split points You can vary the number of split points the chosen number of split points will be distributed evenly around the lap distance Using the Lap Time Options pane you can also sort laps either by lap number default unsorted lap time to highlight your best laps or by time in any selected segment You can now select the 2 laps you wish to compare in the drop down boxes at the bottom of the lap times pane These laps can be from either or both the data sets so for instance you can compare the best laps from each of 2 sessions or 2 laps from the same session Note that all laps from session A and then from session B are shown in both drop down lists On the lower right of the lap times pane are the further lap analysis radio buttons if you have selected 2 laps you can choose which of these laps will be used to draw the G track map and G circles Clicking on the plot data tab on the main pane will display the selected data for both laps overlayed over each other By default selection 1 is in solid line selection 2 in dotted line You can change these display options using the buttons at the bottom of the main pane EI View Data File Data View Marker Option Lap Overlay Plot Area Windows N Lap 6 Circle F Lap Track Beacon Position Adjust 0 Distance m
15. fioo Offset 1 Y Lock Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Window B Brightness LEI Contrast oo Frame 2074 Iv Lock iv Water degC T Aux psi T Fuel T Battery T Brake 1 GLat x10 1 G Long x10 1 Odometer m Data Offset Video Orientation As File Rotated Forward Flipped Record Lap to File E29 Resolution High Low Stop ME Lap Time s Analysis Sel Lap2 Sel Lapt Scale Display Mode T Dual Display on Monitor 1 v Scale im C Rotated Backward aS ar E Play E Stop Video TE gt T Loop J Display Modos Video View Log Data View Video Orientation T As File C Rotated Forward C Rotated Backward C Flipped Record Lap to File Stat Stop Resolution High C Low Resize EV 21T Lego Video View iv Lap Selection 1 T No Lap Selected Resize lt 119 Data Highlight Resize gt Data 2 Resize Y Trackmap _ Resize Transparent x Logo lv a Resize Dual Display on Monitor 1 v Scale te Log Data View W Lap Selection 1 T No Lap Sel jected T Highlight Y Trackmap Transparent r Eja xl Am lt Frame Count 7706 A VideoA amp B l Frame Count 6672 CEE a v gt The Display
16. lap 19 5 4 2 Torque LbFU The estimated calculated torque deployed at that point in the session corresponding to the power given the RPM at that time 19 6 Math Ch 1 3 tab DigiTools provides 3 Math channels which are themselves calculated from other channels Possible uses for these include Subtracting a front wheel speed from a rear wheel speed to show wheelspin Comparing suspension position left to right or front to back to shoe roll or pitch Comparing speed between 2 laps to show speed differential Scaling or shifting an existing Pro channel to display more clearly on the plot To configure math channel Select the 2 traces you wish to use in the math channel Version 1 0 Page 46 O ETB Instruments LTD 2007 DigiDash Tools If you wish to use data from both sets of data as opposed to 2 data variables from the same data set check the Switch Sets box V1 will be taken from data set A while V2 will be taken from data set B and only 1 math channel trace will be plotted If the Switch Sets box is unchecked V1 and V2 will be taken from the same data set and the math channel will be plotted for each data set Select the operator to be used to combine V1 and V2 from Add Subtract Multiply Divide or Scale V1 If Scale V1 is selected V2 is ignored and the math channel will simply multiply V1 by a constant and offset it by a second constant Enter the scaling and offset constants Version 1 0 Page 47
17. point will roll around the circumference of the circle as the brakes blend into cornering into acceleration Any time the point is not at the edge of the circle plotted the tyres are not producing the maximum possible G force or traction Zooming in to a more detailed view of the data see the zoom and pan section allows a much more detailed analysis of these transitions This analysis is complicated by the fact that the car is not grip limited accelerating away from a fast corner it is power limited and differing track conditions camber gradient change may affect the grip available Version 1 0 Page 21 O ETB Instruments LTD 2007 DigiDash Tools By default when a data file is loaded into the Digitools the data is displayed as it was logged which may show noise or interference Inevitably the raw data logged has spikes or uneven readings for instance the G sensors will pick up shocks and bumps from the track If you would rather filter out this noise and see smoother data traces the smoothing can be used function to even out these shocks or noise and make the data easier to read and analyse Note though that smoothing is effectively removing information from the trace so should be used with care To see smoothed data on the View tab check the Filter when Data Loaded box at the bottom Then return to the File tab and load the data session This will apply a small amount of smoothing to every trace
18. type the text you want to use as a label into the white text box before placing the label You can switch between viewing or not viewing the labels on the plot by using the view and Off radio buttons If you make a mistake or want to reposition a label click clear last to remove the last label you placed You can then re place it Clear all removes all labels you have set You can save a set of labels or reload a previously saved set using the save and load labels buttons For instance you could create a set of labels identifying each of the corners for a particular circuit for easy reference Save this then you can reload it for any subsequent data set and the labels will appear in the same positions Version 1 0 Page 17 O ETB Instruments LTD 2007 DigiDash Tools 1 Examining data in detail Zoom and Pan Sometimes you need to examine part of a lap or session more closely than is possible with the whole lap or session on screen DigiTools allows you to zoom in on a section of data and then Pan around like a movie camera to move the view to different areas of the data Click on the View tab in the left hand pane The visible section of data is changed using the options in the Plot Area Zoom Options section To zoom into an area of the data you are interested in click the Zoom Box radio button Then click in one corner of the rectangular area of the displayed data that you want to focus on an
19. 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A Selection 1 Selection 2 Solid Line W Visible 1 Visible C Dotted Line gi C Points D Click on the on option on the radio button at the top of the Marker tab Now if you click and drag your mouse pointer in the main plot area blue or red horizontal marker lines follow the mouse until you drop them at the desired point on the plot Once you have placed the first marker you can introduce the second marker by dragging the mouse from the left edge of the plot area To reposition a marker click the mouse near the current position and drag it to the new position The marker closest to where you start dragging will be picked up the other marker will remain where it is With markers switched on as you move the mouse over the plot area you can see the readings corresponding to the current cursor position in the white area of the Marker Data section Version 1 0 Page 14 O ETB Instruments LTD 2007 DigiDash Tools P View Data Fie Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Cicle Video Overlay Engine Analysis Markers Labels and Statistics Plot View Lap Overlay Data A ECM TT A On Drag from left axis 120 Marker Options 7 Plot Marker in Plot Window FF Video Data Marker Position Marker Data 46 21 2 67 deltas Labels Off C
20. CRA PA M 19 1 PEO VAD ASK AA AA ANA ANAN 41 TOTAL RPM A Naa ote Aba 41 19 127 TOGO AA 41 US BG td ne cdd deco eo anto denle 41 19 14 OUP KOSS UNG AA 42 19 1 5 Oil Temperature uwiii 42 19 1 6 Water Temperature eee ee eee eee eee eee eee 42 19 17 AWAPE UE a waa 42 a AA yan seteGr ainsi baenee 42 TOD Battery Sr nn A a d a ee ce 43 19 1 10 A 43 19 1 11 CAL TO tonte as TR AE 43 19 1 12 Gi Long l O dak GN A A re 43 19 1 13 S lt ell T 43 19 1 14 Lp ui da 43 19 1 15 a ee Stein 43 19 2 Prot Extra ta anses Ad entree Ada 44 19 3 e R 5 1 AUWA TR RS A Le te 44 19 4 CAIDA a ida 45 19 5 Other tab wi GAAN NARING NANANA NANA 45 Version 1 0 Page 3 O ETB Instruments LTD 2007 DigiDash Tools 19 5 1 GPS Module Speed and Altitude 45 19 5 2 Gear Module Act Gear 0 aasa 45 19 5 3 Sensor Module 1 2 Additional speed channels 45 19 5 4 Engine Analysis usina 46 19 6 Math e 5 a Tabo aka aaa aaa 46 20 APPENDIK 1 Warranty rren 48 Version 1 0 Page 4 O ETB Instruments LTD 2007 DigiDash Tools 1 DigiDash DigiTools Introduction This document describes the DigiTools software that is provided with the DigiDash Lite DigiDash Pro and DigiDash Pro It shows a selection of tips and techniques for analysing data logged by your DigiDash 2 using the Digitools Software It
21. DigiDash Tools O ETB Instruments LTD 2007 IAL SER MANL www etbinstruments com Page 1 Version 1 0 O ETB Instruments LTD 2007 DigiDash Tools 1 DigiDash DigiTools Introduction nenes 5 2 Ii RA A a li 6 3 Ps 8 4 Selecting the data features to be piotted sss2 s s s ssszszszsmsmsmsmsmsmsmmmsssw 10 AAA a ti nne 12 5 1 Mini Track AAPP aerie paap Ee mnn rap aaraa dopi nan esse 13 6 a 14 6 1 Maximum minimum and average statistics 16 6 2 STs oa ER RE AA 16 1 Examining data in detail Zoom and Pan x 18 7 1 Function Key Shortcuts acosa aci 19 o ARMA A IA 20 9 Data OOOO ii la ci ne man 22 10 Changing A 23 T Engine Analysis nnan 24 22 A na iaaa oiean a a aiaei 26 12 1 Distances amp average distance 26 12 2 Split times Segment times deltas 26 12 25 Split Segment Tan Ata 26 12227 SONIDOS ait aa oia dt 26 13 Option naaa a a nn 21 ASA G SENSOF settings orion ir ae ete AAA 27 13 2 Speed Correction 27 14 Exporting 0 T TO AP 28 14 1 Printing or saving plots cuina ANAN ANTAS AA 28 14 2 Exporting and using CSV files is 28 Version 1 0 Page 2 O ETB Instruments LTD 2007 DigiDash Tools O aa 30 16 Split times Segment times and lap COMPArISONS ara aaa ean 32 T RRA kasuku kukuua kukuwa kukua 36 18 A a 38 18 1 Analog Sensor Calibration ss 40
22. ETB Instruments LTD 2007 DigiDash Tools 11 GPS Features This section applies only to the DigiDash Pro model with optional GPS module The GPS module logs the car s position 5 times per second 5 Hz This is fast enough to plot an accurate track map that enables you to see different lines round the track on different laps Critical points such as the start finish line are interpolated between plotted points where necessary to ensure that lap times are accurate to within around 0 01 second rather than the 0 2 second that simply relying on the nearest plot to the finish line would offer Taking data logged with the GPS module you can switch the track map from G force data to GPS data using the radio button to the right of the track map The plot below compares a fastest race lap at Lydden Hill in Kent 43 37 Selection 1 with a lap later in the same session 44 58 Selection 2 We have selected 4 split points and the track map is showing delta segments Note that most of the 1 2s lap time is lost in the left handed Devil s Elbow and the final Paddock corner These 2 corners require the most commitment so it is not surprising to see times backing off later in the race especially if there was not a close battle for position EIP View Data Fie Data View Marker Option Pat Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Load and Print Data p Data Set A Plot G Mode
23. Mode box allows you to put a scaled version of the video into another window or monitor 100 An RPM 9506 Gear 3 OHT O Water 73 GLong 0 78 Brake 0 Time 54 22s Sess 1 Data Set B Load Data Set B Data Set H loaded trom No Data Sample Hate 0 Plot Propers Samples s Display Preferences Load File Save File Pret Plot Printto Device Print to File bmp Send to ClipDoard Menu Control Back to Main Menu Lap Tes Dato A Notez Data B Notes Track Map G Crcie Vid o Oveday Engine Analysis Laye Video Offset E AS Loop Loki Data Ottset f Display Mode 2 Dual Display on Montar Scale D Video Orientation As File O Rotated Forward Rotated Hazkoad TON Flipped Record Lap to Fite Video View Log Data View Lap Selection 1 Je Y Dala frt Soo jon Trackmag Rewe Tionoaent ai Logo D Video ARR Video Log B aja Version 1 0 Page 31 O ETB Instruments LTD 2007 DigiDash Tools 16 Split times Segment times and lap comparisons The DigiDash and Digitools allows you to specify a number of split points round the lap Split time is the time taken to travel from the Start Finish line to a given split point Segment time is the time taken to travel between 2 consecutive split points the S F line is a split point in this case Segment times can be used to give you more detailed information on where and why one lap is faster tha
24. a Fie Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map Circle Video Overlay Engine Analysis Load and Print Data Track Map Data Set A 5 2 Plot G Mode a File Race 2 LogSession 2 dig Circuit Lap C Sprint Hill Data Set A loaded from Race 2 LogSession 2 dig Grid Style off Sample Rate 20 Samples s C Lines Dotted Lines Data Set B Source Load Data Set B GData Data Set B loaded from C GPS Data No Data Track Map Lap Sample Rate 0 Samples s Selection 1 Selection 2 Plot Progress Options 1 Overlay Tracks Display Preferences NW Selection 2 Dotted Trace Load File Save File Track Details Print Plot Selection 2 Print to Device Lap Num 5 Red Line Lap Selection 2 Slower Session 1 Print to File bmp Green Line Lap Selection 2 Faster DataSet A eee Black Line Equal Segment Time Lap Time 53 315 Track Adjust Track analysis Zoom Options F1 for Help Menu Control Ree Delta Segments y o off Back to Main Menu Zoom Pan Full a Zoom Box Shape J FN Delta Seg Width C Pan XY The first segment extends from the start line to the apex of Druids hairpin The second extends round to the entry of clearways and the third extends from there back round to the start finish line Note that the split points are equally split round the lap distance rather than placed at particular points Version 1 0 Page 33 O ETB Ins
25. akes are being used TIP By using the braking view on the track map you can see where on the lap you are slow coming from the accelerator to the brake pedal and where you may be coasting off the brakes rather than getting back on the power SIR View Data File Dala View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Data Select Track Map X Axis Data Plot G Mode Time z onX Axis File Race_2_LogSession_2 dig G Circuit Lap Sprint Hill Pio Prov Extra Ch1 8 cal Grid Style DD2 Standard Channels C Off Fe sal l C Lines Ka rd Dotted Lines WU me Fr pmo Source E E Speed MPH GData Wy Gea x10 C GPS Data MM gt W Y Oi psi Track Map Lap E E oifdegc Selection 1 E E Water degC Selection 2 yl 0 7 ax psi Options E E Fuelz 1 Overlay Tracks My m Battery IV Selection 2 El ER paa gt Dotted Trace RIT Glaxo Track Details Selection 2 My M Glong x10 Lap Num 5 Dm Odometer m Session 1 DataSet A Ey x LapTimels Lap Time 53 315 Lap Analysis Sel Lap2 Sel Lap1 cale Track Adjust Track analysis Zoom Options F1 for Help IS gt F oo Rp G Long Accel Brake v 2 e a Full s Iv View Braking Blue TE IZ Odo Slip m Shape 5 r s Fe
26. analysis window Version 1 0 Page 7 O ETB Instruments LTD 2007 DigiDash Tools You can compare 2 laps of data either from the same data file or from separate files sessions Click on the View tab on the left hand pane and towards the top of the View Options pane click the Lap Overlay option You will be prompted with a dialog box to choose laps from the Lap Times area Click on the Lap Times tab of the right hand pane to display all laps in the current file The upper table shows all the laps in data set A with details of the best lap below The lower table shows data set B s laps if you have loaded a second set of data Click on the Lap Times tab of the main pane Each lap of the loaded file or files is displayed in a separate table for each file with the lap time distance MPH and split times Note that the distance recorded for that lap should be checked to ensure that any lap you are considering is complete and correct For instance sometimes because of the position of other cars the lap trigger may not see the trackside beacon on one lap the DigiDash will miss the end of that lap and will instead record one long lap whose distance is roughly double the norm At the bottom of each lap table are statistics highlighting the best lap a theoretical best lap time taking the aggregate of the lowest time recorded in each segment and the average distance of all laps If you identify unrepresentati
27. assumes that you have the Digidash properly configured for your car revs speed brakes etc you have run it at a race track to generate some data at least one set you have installed the Digitools software on your PC you have downloaded that data from the Digidash to your PC with the Digitools software installed Basic instructions on the installation and use of the DigiDash and DigiTools is contained in the main DigiDash Manual Version 1 0 Page 5 O ETB Instruments LTD 2007 DigiDash Tools 2 Loading Data Starting at the most basic level from the main DigiTools menu choose the DigiDash Logger option T DigiDash Tools 4 15 DigiDash ToolBox Exit About This is the main Logger menu EI Log Analysis Data Set A Options Data Set B Options DigiDash Download Serial Port i Load Data Set B es ES 8 ort Download Menu Save Data SetA Save Data Set B COM1 Save Data A Excel Save Data B Excel DigiTools Analysis Menu Control Edit Data A Notes Edit Data B Notes 7 E View Data Main Menu No Data No Data From here click on Load Data Set A which will open a standard file browse window Browse to the appropriate file highlight it and press Open You will see a progress window as the file loads followed by an information window confirming the file successfully loaded Information i Processed 274501 bytes of Data TIP It may help to organise your data fi
28. at the apex of the first corner as soon as a big oversteer moment is recovered big spike in the steering plot followed by a swift rise in the TPS There is one significant lift towards the exit of the first corner accompanied by a smaller oversteer moment on the steering trace The brief drops in throttle position in the run up to the final braking zone of the lap indicate upshifts and coincide with the gear trace au Time s In the plot above the following traces are visible Steering black between 130 and 210 revs red between 70 and 110 7000 and 11000 rpm speed purple in the same region as revs Version 1 0 Page 39 O ETB Instruments LTD 2007 DigiDash Tools Brake blue square wave 0 or 100 Throttle position purple between 30 and 80 Gear step form trace between 20 and 50 Battery steady dark red at around 13 GLong blue between 5 and 15 GLat purple between 20 and 15 16 1 Analog Sensor Calibration A 0 5V sensor will read between 0 and 5 in the Digidash data By default this will not be very visible since the Y scale is likely to be up to around 100 or more to cope with revs and speed The Digitools provide a multiplication factor and an addition offset Putting say 10 in the multiplication factor would make the trace read between 0 and 50 which will be more visible Putting a non zero value in the addition offset will move the whole trace up or down for a nega
29. car s performance on the road Power at the flywheel can be estimated independently for each data file by configuring the transmission losses This is the amount of power lost between the engine flywheel and the road in the gearbox transmission differential bearings and tyres The default settings of 12 plus a fixed 10bhp loss are commonly accepted but you may change these if you think your car is more or less efficient The plotting of the flywheel power can be turned on or off and its colour for each data session controlled in the Plot Control area Also configured for each data file is the car s weight The default value is that configured into the Digidash by the configuration tool However as the car runs through a session it will have differing levels of fuel and hence different weight Different drivers will also affect the car s weight Remember the weight used here should be the all up weight of the car as it is running on the track not the dry weight or kerb weight excluding driver and will directly affect the power levels but not the overal shape of the plotted curve By carefully setting the configuration for each data session power output between different cars or with different settings on the same car can be compared just as you would do on a rolling road though potentially at much lower or no cost Ideally if you are working on engine tuning you would perform repeatable runs on a straight piece of track
30. d File Save File A Track Details Print Plot Selection 2 Print to Device Red Line Lap Selection 2 Slower Print to File bmp Green Line Lap Selection 2 Faster N Black Line Equal Segment Time Lap Time 53 315 F canal Track Adjust Track analysis Zoom Options F1 for Help Sen Delta Segments y off Rotate zi C Zoom Pan Full Back to Main Menu E C Zoom B e o a Pr Now we can see that lap 5 makes its time up mostly in the run up and through Druids perhaps by better exit speed from Paddock turn 1 and that most of lap 4 s gain is in segment 4 through Surtees the left hander at the end of the back straight and the earlier part of the following Clearways This information can alternatively be displayed in the main plot window using the Odo Slip or Time Slip traces Below the green trace is Odo distance slip which shows the same overall information lap 4 gains time just after the start finish line loses some at the beginning of the second half of the lap and then wins it all back and more in the last part To continue the analysis further we would look in more detail at this plot to try to see why each lap was better in particular sectors earlier throttle application later and harder braking higher apex speed etc Version 1 0 Page 34 O ETB Instruments LTD 2007 DigiDash Tools View Data CML CE mz Cel CEl Gel mc col mc mc CE T 77 Version 1 0 O
31. d drag the pointer over to the opposite corner a rectangle is drawn showing the area that will be displayed When you release the mouse button the area within the rectangle will be expanded to fit the full available screen area Axes are re scaled automatically to make the data fit the screen In the example below we have zoomed in on the braking zone on the approach to Druids the same area we looked at in the Markers section You can see much more clearly the transition from throttle to brake the 3 down changes and the degree of trail braking as the lat G trace purple starts to show cornering about half a second before the brake is released Note also from the longitudinal G trace blue how the deceleration reduces as the cornering begins the brakes have been eased to allow the tyres to cope with the cornering We will analyse this in more detail in the G Circle section ET View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis View Options Plot Plot View Lap Overlay Data A Race_2_LogSession_2 dig Data All Plot Data 1204 Lap Overlay Plot Area Windows T Lap G Circle iv Lap Track Beacon Position Adjust o Distance m Plot Data Options F1 Help Zoom and Pan Qi Full C Zoom Box Zoom Pan C Pan Axis 1 C Pan Axis 2 Pan Axis 1 Horiz Only C Pan Axis 2 Horiz Only C Pan All C Pan A
32. do Slip is only available when Time is on the X axis This is a very useful data feature which shows the difference in distance covered or time in each lap for the same number of seconds or metres into the lap Itis a measure how far ahead or behind the car on one lap would be versus the car on the other lap if they had crossed the start line lap beacon at the same moment Version 1 0 Page 43 O ETB Instruments LTD 2007 DigiDash Tools This can be used to identify clearly where time distance is being made up or lost between laps by the same or different drivers enabling driving technique or setup changes to be analysed For instance if on one lap the car exits a given corner faster than the other lap all other things being equal the odo slip time slip reading will begin to increase or decrease depending on which lap was faster from that corner along the following straight until the next corner is reached showing that the first lap was traveling faster down the straight Odo slip units can be switched from Metres to Feet using the Option tab 19 2 Pro Extra tab These channels are only logged by the DigiDash Pro They comprise 4 analog channels which can be connected and labelled by entering channel names in place of Title ChN For each channel not only can the colour of the plot be chosen for each trace but the channel reading can be scaled and shifted For each expansion channel in use on the car use the drop d
33. dule or 2 that provides 8 analog channels plus 2 additional speed pulse channels These channels are typically used to log steering position measured using either linear or rotary potentiometers throttle position either using a dedicated potentiometer or simply tapping into the signal from an existing throttle pot used by the engine s ECU air fuel ratio using a 3 party narrow or wideband Lambda module suspension positions using linear or rotarty potentiometers airbox air pressure using a pressure sensor additional temperature or pressure sensors essentially anything that can be measured using a potentiometer variable resistor or that can output a signal between 0 and 5Volts When using potentiometers there are 3 terminals The resistance between 2 of them will not change as the potentiometer is moved these terminals should be connected to the 5v and OV Earth from the DigiDash analog channel loom The 3 terminal should be connected to the signal wire of the analog channel Connected thus the signal wire will vary between 0 and 5V as the potentiometer is moved Sensors such as the Throttle Position Sensor TPS that is used by the engine s ECU are also potentiometers and can be logged by the Digidash However as the engine s loom will already provide the 5v feed you should simply identify the signal and earth wires to the TPS and tap the signal and earth wires from the DigiDash analog channel into them Havi
34. e Rate 20 Sampins s Data Set B Lood Data Set B Data Sot N loaded hom No Data Sample Rate 0 Samples s Plot Progress Desplay Dilo ete es Load File Seve File Print Phot Printto Device Print to File bmp Send to ChpBoard Menu Control Back to Mam Menu Piot Data Lap Times Data A Notes Data D Notes Track Map G Cache Video Oveday Engine Analysis Track Map File tace2 Log5ession 11 69 N 1 1 H H j l l hed Lina Lap Selection 2 Slower Green Line Lap Selection 2 Faster je Black Line Equal Segment Time Track Adjust Track analysis Zoom Options F1 tor Help p Dats Segment on Rotate da Zen Pan Full z J Zoom Box Shape DekaSegwidth by BPS Data Track Map Lap Selection 1 Selection 2 Options lt Oveday Tracks lt Selection 2 Dotted Trace Track Details Selection 1 Lap Mum 7 Session 1 DataSet A Lap Tano 43 378 Note that overlay tracks is also available when plotting G Force track maps but the inaccuracies inherent in the GForce plotting which is affected by body roll hills and tail out slides Version 1 0 make this far less reliable Page 37 O ETB Instruments LTD 2007 DigiDash Tools 18 Analog Channels The DigiDash Pro offers 4 generic analog channels 0 5V in addition to the standard dedicated Pro channels Either the Pro or the Pro can be expanded with an additional mo
35. e speed and revs 19 5 3 Sensor Module 1 2 Additional speed channels These channels are only logged when one or 2 Analog Sensor modules are connected to the DigiDash Pro or Pro Each module provides 2 speed channels S1 S2 which may be used to record additional wheel speeds to monitor wheelspin diff operation or brake lockup for instance or any other rotating part on the car Version 1 0 Page 45 O ETB Instruments LTD 2007 DigiDash Tools The appropriate calibration value should be entered for each speed channel used in Pulses Per Mile To calculate this value use the following formula assuming the sensor is reading magnets attached to a wheel hub or half shaft PPM 1609 number of magnets Rolling circumference of wheel in Metres If the sensor is reading prop shaft revolutions the above formula should be multiplied by the diff ratio e g 3 54 19 5 4 Engine Analysis 19 5 41 Power BHP The estimated calculated power deployed at the wheels at that point in the session This is based on the acceleration G Long speed revs and the weight configured in the Engine Analysis tab Note that the BHP figure produced depends for its accuracy on the accuracy of this weight which will vary somewhat with fuel load etc as well as the contour of the track accelerating down and up hill is likely to skew the figures Power will vary not only with the engine s power curve but also with the throttle used over the
36. he concept of the traction circle In summary a tyre can only provide a certain amount of grip and the driver must choose in which direction this grip is used and how much grip is used from time to time Therefore if the driver is asking the tyre to use 100 of its grip in braking any attempt to turn the car without reducing the braking effort will result in the car sliding or losing control If we plot the lateral and longitudinal G forces produced by a car at the limits of grip in theory we might expect the pattern to form a circle this is known as a traction circle or G Circle In practice of course the tyres have differing levels of grip in cornering across the tyre tread and across the car s track from braking along the tyre tread and along the car s wheelbase and acceleration where there may only be 1 pair of tyres contributing to the acceleration on a 2 wheel drive car The G Circle tab on the right hand pane plots the lat and long G readings for each moment of data ona G circle File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Markers Labels and Statistics G Circle Map Markers View Lap Overlay 6 off On Drag from left axis Marker Options 17 Plot Marker in Plot Window I Video Data Marker Position Marker Data Left Turn 994 Off C Set Label View r Put Text Here Clear Last Clea
37. hroughout the session Lap analysis plotting RPM Speed Gear Brake G lat G long and delta Odo These traces are more useful for comparing your fastest laps from the session or with a previous session Each configuration can be loaded in a moment using the Load File button in the Display Preferences section of the File tab Version 1 0 Page 11 O ETB Instruments LTD 2007 DigiDash Tools y Track Mapping Digitools can draw a map of the circuit so long as the speedo sensor and G force sensors are correctly configured and logged The software uses the lateral G force and the distance travelled to draw the map and applies error correction to ensure the map forms a complete circuit Note With the Pro and optional GPS module more accurate track mapping can be displayed from the GPS positioning data This allows actual lines through each corner to be compared a level of detail not possible with the G force mapping To enable the track mapping you need to plot the data by lap and to select one or 2 laps to view see Comparing two laps Clicking on the Track Map tab of the right hand data plot pane shows a full size map of the track The line forming the track is coloured red or green By default this colour indicates the longitudinal G at that point in the lap Green for acceleration and Red for deceleration By selecting the View Braking Blue check box you can highlight on the track map where br
38. igured check the pulses per cycle in the Calibration section of the Configuration tool in DigiTools 19 1 2 Speed Vehicle speed as picked up by the Digidash s speed sensor If the values recorded are not those you would expect check the configuration in the Calibration section of the Configuration tool The normal sensor used by the Digidash picks up a series of magnets glued to a hub propshaft etc Check that the magnets are all present that the sensor is rigidly mounted and close enough to the magnets as they rotate The speed plot can be switched between MPH and KPH in the Option tab of the View Data window 19 1 3 Gear 10 This is the gear calculated by the digidash from the speed and RPM If this is not showing the values you expect check the correct speed and revs calibration as well as the calibration of the gears in the gears tab of the configuration tool The gear reading is multiplied by 10 to make it easier to read on the plots TIP If the speed pickup is on an undriven wheel i e a front wheel of a rear wheel drive car fluctuation in the gear reading can indicate wheel spin at that point on the lap Whatever the set up fluctuating gear reading can also indicate a slipping clutch Version 1 0 Page 41 O ETB Instruments LTD 2007 DigiDash Tools 19 14 Oil Pressure Oil pressure as read by the Digidash oil pressure sensor Oil pressure will typically vary to some extent with revs However a drop in oil
39. k Map In the Plot Data tab on the main pane you can display or switch off a mini track map by checking or unchecking the Lap Track box in the View tab of the left hand pane This mini map is useful as a reference when looking at the data and coloured dots will indicate where on the lap each marker is currently placed see Markers section Version 1 0 Page 13 O ETB Instruments LTD 2007 DigiDash Tools 6 Markers and Labels You can set markers on the plot data which allow you to take accurate pinpoint readings of any trace and show the differences between 2 points in terms of time distance and reading by using markers Click on the Marker tab on the left hand pane P View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Markers Labels and Statistics Plot View Lap Overlay Data A Race 2 LogSession 2 dig J C On Drag from left axis 1204 PAN Marker Options M Plot Marker in Plot Window A MV Video Data Marker Position 1004 Marker Data VA Labels C Set Label C SetText Put Text Here Clear Last Clear All Load Labels Save Labels Off C View Statistics Time Axis Only Stats On T 0 T a Tasa Press F1 for Function Key Help Stats on RPR y Sel
40. les into folders for each track you visit this makes finding data from previous visits to a circuit easier Adopting a file naming convention such as track date session e g Brands 050927 race1 may also help locate the data you are interested in Version 1 0 Page 6 O ETB Instruments LTD 2007 DigiDash Tools Clicking OK returns you to the main logger window but you will notice that the name of the file you have just loaded in the bottom of the Data Set A Options pane Now click on the View Data button to open the data analysis window Tb View Data OS File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Load and Print Data HUN Plot Data Set View Plot All ait U q Load Data SetA Data Set A loaded from Race_2_LogSession_2 dig 1204 Sample Rate 2o Samples s 100 i Data Set B iH ji Load Data Set B ii Wi Ear i pu R il Hi IU h v hy ll Plot Progress N Display Preferences Load File Save File Print Plot Print to Device Print to File bmp 0 al 0 200 400 rine Send to ClipBoard Press F1 for Function Key Help Data A Line Data B Line amp Solid Line f visible 7 Solid Line F Visible C Dotted Line C Dotted Line Points C Points Menu Control Back to Main Menu Each of the remaining sections of this document start from this
41. ll Horiz Only Axis Options IV Y Axis AutoScale Select D hi Press F1 for Function Key Help ote Acs Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A Smooth RPM y Solid Line Y Visible T Visible T Filter when Data Loaded Dotted Line C Points If you are not happy with the area you have selected with the Zoom Box or you want to return to a wider view you can return to display all the data by clicking on the Full button Version 1 0 Page 18 O ETB Instruments LTD 2007 DigiDash Tools Having zoomed in you can move the view around the rest of the data Pan by clicking the Pan All radio button Now clicking and dragging the mouse in the plot pane moves the data under the window If you only want to go left and right and not up and down you can click Pan All Horiz 11 Function Key Shortcuts Pressing F1 will bring up a help guide to the function key shortcuts available in DigiTools These function keys cover most of the frequently used zoom pan and marker actions greatly speeding up the analysis of your data Function Key Guide F1 Show this Guide F2 Hold down and Zoom Box F3 Hold down and Pan F4 Zoom Out F5 Zoom In F6 Markers On F7 Markers Off F9 Zoom Full Version 1 0 Page 19 O ETB Instruments LTD 2007 DigiDash Tools If you have read any books on car performance and control you should be familiar with t
42. n Key Help xis 98 42 at 3 72 Sel 1 Log 1 Lap 4 Data A Time 53 14 Sel 2 Log 1 Lap 5 Data A Time 53 31 fe Solid Line F Visible 8 Solid Line M Visible TE T Odo Slip m C Dotted Line Dotted Line paa Points f Roms Hy la Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A Clicking on the check boxes on this pane switches on or off the trace for the corresponding data feature for both selected laps or sessions You can change the colour of the trace for any data feature for one or both the selections to make the plot easier to read You can also use the buttons at the bottom of the main pane to select whether each selection is plotted at all as a solid or dotted line or points TIP Selecting the Time Slip or Odo Slip trace at the bottom of the data tab displays a plot of the cumulative difference between the 2 laps shown At most one of these trace options is available depending on whether the X axis selected is Distance or Time These traces are very useful for highlighting where time is being won or lost between 2 laps even if the ultimate lap time is similar To allow the differences between the laps to be clear you can select a scaling factor for the slip plot Version 1 0 Page 10 O ETB Instruments LTD 2007 DigiDash Tools SIR View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle
43. n another and allow you to focus your analysis on what is different between the 2 laps in those areas where there is the biggest gain in time DigiTools offers a number of ways of presenting this information to make the analysis easier By example we have the data set below in the Lap Times view in which the best lap 53 14 was on lap 4 The following lap lap 5 was 17 seconds slower which might appear to be only a relatively small difference but it would be nice to know where this difference comes from Also the calculated theoretical best lap calculated by summing the best segment time from each segment across all laps View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Load and Print Data Lap Times Data Set A Data A Lap Times Race 2 LogSession 2 dig Load Data Set A Sel Session Lap Lap Time s Distance m Avg MPH Split1 Split 2 1 1 57 50 19125 74 84 21 38 40 64 Data Set A loaded from Race 2 LogSession 2 dig 53 44 1940 3 81 69 16 79 36 32 53 35 1939 5 81 80 16 74 36 09 53 31 1935 1 81 67 16 89 36 14 1 2 1 3 Sample Rate 20 Samples s 1 4 5314 1936 0 81 97 16 94 36 14 1 5 1 6 Data Set B 81 27 17 21 36 62 53 53 19334 E Load Data Set B gt Data Set B loaded from Best Sess Lap 4 Time 53 14 at 81 97 MPH Theory 51 23 AvgDist 1927 0 mj No Data _ ata Sample Ra
44. ng wired up your sensors DigiTools needs to be configured Each analog channel is available in the Data tab either in the Pro Extra sub tab Pro 4 additional analog channels or the Ch1 8 tab Analog Sensor expansion module In either case for each channel you should Name the channel in the text box default Title Chn Select the type of sensor either universal 0 5V or one of the standard sensor types available from ETB which are pre calibrated in DigiTools Calibrate the sensor see later Version 1 0 Page 38 O ETB Instruments LTD 2007 DigiDash Tools An example of a data plot using analog channels is shown below Steering is the black plot at the top of the trace It has been arbitrarily scaled to give a good visual range on screen and offset to move the plot away from the other traces Note that this car uses a rotary potentiometer actually a TPS from a Vauxhall road car with a lever arm and linkage to the steering arm The geometry of this linkage magnifies more extreme steering movements and sharp oversteer corrections can be seen in the slower corners Throttle position is the purple plot that runs between 30 and 80 This has again been scaled to make it easier to differentiate from the blue braking plot which has a similar square wave shape to it and which goes from 0 100 Otherwise a more logical scaling might have the TPS trace go from 0 100 Here we can see that the power is applied fairly rapidly
45. o the result to shift the trace up or down for a negative value 19 4 Ch 9 16 tab These channels are only logged when a second Alanog Sensor module is connected to the DigiDash Pro or Pro They comprise 8 analog channels which can be connected and labelled by entering channel names in place of Title ChN For each channel not only can the colour of the plot be chosen for each trace but the channel reading can be scaled and shifted For each expansion channel in use on the car use the drop down box to change the channel from off to select the appropriate sensor type Fluid temperature air temperature and boost have non linear outputs which are compensated automatically by Digitools For other linear sensors such as potentiometers etc choose the 0 5v scale option To adjust the scale and position of the data use the 2 numeric fields the left hand field multiplies the value while the right hand field is added to the result to shift the trace up or down for a negative value 19 5 Other tab 19 5 1 GPS Module Speed and Altitude These channels are only logged when a GPS module is connected to the DigiDash Pro They comprise Speed and Altitude as logged by the GPS system 19 5 2 Gear Module Act Gear 10 This channel is only logged when the optional Gear Module is connected and is the engaged gear registered by the module as opposed to the standard gear in the Pro tab which is calculated from th
46. own box to change the channel from off to select the appropriate sensor type Fluid temperature air temperature and boost have non linear outputs which are compensated automatically by Digitools For other linear sensors such as potentiometers etc choose the 0 5v scale option To adjust the scale and position of the data use the 2 numeric fields the left hand field multiplies the value while the right hand field is added to the result to shift the trace up or down for a negative value 19 3 Ch 1 8 tab These channels are only logged when the Alanog Sensor module is connected to the DigiDash Pro or Pro They comprise 8 analog channels which can be connected and labelled by entering channel names in place of Title ChN For each channel not only can the colour of the plot be chosen for each trace but the channel reading can be scaled and shifted For each expansion channel in use on the car use the drop down box to change the channel from off to select the appropriate sensor type Fluid temperature air temperature and boost have non linear outputs which are compensated automatically by Digitools For other linear sensors such as potentiometers etc choose the 0 5v scale option Version 1 0 Page 44 O ETB Instruments LTD 2007 DigiDash Tools To adjust the scale and position of the data use the 2 numeric fields the left hand field multiplies the value while the right hand field is added t
47. r All Load Labels Save Labels Statistics Time Axis Only On All Data E HE Z a C In Window Ava 2 10 Stats on RPM y Zoom Options F1 for Help Data Key Off Selection1 Selection 2 Full Y View Log l Lap 4 Data Braking Activated C Zoom Box C PanXY Braking Activated v 00 Braking If you are viewing all plot data the G circle will cover the entire session If you are viewing lap overlay the G circle will be plotted for the lap s you have selected The laps are colour coded green and purple and each can be switched on or off using the check boxes in the Data Key area at the bottom of the main pane The points where brakes are applied are highlighted with a lighter shade Note on the example above how the lower part of the plot is lighter green showing how higher levels of deceleration are achieved under braking as you would expect You can use the Zoom Pan functions at the bottom of the main G Circle pane to focus on smaller areas of the plot or to make it fit the screen better Version 1 0 Page 20 O ETB Instruments LTD 2007 DigiDash Tools On the View tab on the left pane there is a check box for Lap G Circle Checking this box switches on a miniature version of the G circle plot on the main Plot Data tab I View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Anal
48. r saving it to a bitmap image file Print to File bmp button You can also copy the plot image to the clipboard using the Send to Clipboard button The image can then be pasted into another document like this 120 14 2 Exporting and using CSV files There may be times when Digitools does not allow you to do the analysis you require Digitools allows you to export the data from a lap as a Comma Separated Variable CSV text file CSV files can be read into a spreadsheet very simply and from there you can use the spreadsheet s calculation statistics and plotting functionality to work with your data To export the data go to the lap times tab and select the lap that you want to export in either the Selection 1 or Selection 2 drop down box at the bottom Over in the bottom right corner select the Lap Selection radio button 1 or 2 that corresponds to the lap selection you are interested in Click on Export Lap button and select the file name and location to save the csv file Version 1 0 Page 28 O ETB Instruments LTD 2007 DigiDash Tools 53 44 asoa 6169 171 366 53 35 19995 ma LI an 5314 1966 8197 172 266 san assi 8187 17 37 Version 1 0 Page 29 O ETB Instruments LTD 2007 DigiDash Tools 15 Video Overlay The video overlay tab allows you to overlay your race data track map lap position and company logos onto the original video stream The data can then be
49. re showing the effects of any ram air system The pressure plot can be switched between PSI and Bar in the Option tab of the View Data window 19 1 8 Fuel Fuel level as measured by the Digidash fuel level sensor Version 1 0 Page 42 O ETB Instruments LTD 2007 DigiDash Tools Fuel level is useful for estimating the weight of the car at any point in a session which will affect lap times and power calculations Ensure that the correct gauge is configured in the Fuel tab of the configuration tool 19 1 9 Battery Battery voltage as supplied to the Digidash logger box 19 1 10 Brake Shows 0 when brakes are not applied 100 when they are applied 19111 Glat 10 Lateral cornering G force multiplied by 10 to aid readability 19 112 b Long 10 Longitudinal acceleration and braking G force multiplied by 10 to aid readability 19 1 13 Odometer The distance travelled in this session cumulative Units can be switched from Metres to Feet using the Option tab 19 114 Lan Time The lap time of the current lap One use of this plot is when viewing multiple laps simultaneously on screen to show graphically how lap times have varied over the session by looking at the peak height of the sawtooth pattern 19 1 15 Time Slip Odo Slip This feature is only available for selection when 2 laps are selected in the Lap Times tab for comparison Time slip is only available when Distance is on the X axis O
50. recorded is calculated at each RPM point and these maxima are plotted So only time spent at full throttle is relevant to this plot 2 curves can be plotted simultaneously However these 2 plots will always relate to the whole data files loaded rather than as in the plot data tab laps selected in the Lap Times tab If only one file is loaded into the DigiTools only one plot will be available Plot colours are controlled by the Power and Torque settings at the bottom of the Data tab s Other sub tab in the left hand pane The appearance solid dotted line or points or non appearance on or off of each plot is controlled by the settings at the bottom of the Plot Data tab in the right hand pane Ib View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Data Select Engine Analysis CDS Power BHP and Torque If Engine Power and Torque Analysis Data A Time on X Axis A New Weight DD2 Config LA 570 kg 570 kal Pio Prot Extra Ch18 cell 7 Flywheel Estimate DD2 Standard Channels 7 Fixed Losses Data A 10 Z BHP r Data B a Variable Losses y iv RPM 100 L 7 12 3 2 E Speed MPH S WG Gea x10 Dana M7 Dii New Weight DD2 Config HE DilfdegC 0 kg 0 kg E zj water dent ee Flywheel Estimate HE T Aux psi YS Fixed Losses i Fux T r a T E 10 Z BHP ER PMAN Variable
51. s Load File Save File Prira Plor Print to Device Print to File bmp __ Send to ClipBoard Manu Control Back to Main Menu Track Map File pace _LogSessen_11 dig Green Line Lap Selection 2 Faster Black Line Equal Segment Time Track Adjust Track analysis _ L alysis Zoom Options F1 for Help Relata Delta Segments gt on Zoom Pan Full Zoom Box C Pan XY apa F Delta Seg Width Hed Lane Lag Selechon 2 Slow Plot G Mode 7 Circuit Lap C Spain a Grid Style on Lines Dotted Lines Source G Data GPS Dala Track Map Lap Selection 1 1 Selection 2 Ophons Overtoy Tracks le Selection 2 Dotted Trace Track Detads Selection 1 Lap Num 7 Session 1 DataSet A Lap Time 43 371 Looking at the lines taken on the 2 laps the major differences that can be seen are that on the second slower lap the driver missed the apex of Devil s Elbow which would account for the loss in time there and made an earlier entry to the following hairpin which might also explain the small time loss in that sector Using the zoom function to look at the hairpin in more detail we can see that the whole run up to the hairpin stays to the right of the track on the second lap leading into the earlier entry This is quite likely to be due to passing a back marker so perhaps the time lost here is not simply due to the driver backing off Data Set A loaded hom rece2_LogSession_11 dig Sampl
52. saved to file for posting onto your website or for future reference You can overlay data by adjusting the video bar and data bar bars to synchronise your data to the video Then click the Lock checkbox to lock the data sets together Press Play on the video and the data set is scanned through with your video synchronised to the data SIR View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Data Select Video Editing K Axis Data Window A Window B Time v on X Axis mn ni Pio Pro Exta Ch1 8 C4 gt Wes sa M al JR DD2 Standard Channels Video Video Selection 1 ed Brightness Brightness r No Lap v 1 J L PA Y RPM 100 gt p Contrast Contrast E 10 Speed MPH IY at e J Gear x10 Video Frame Video Frame E 7 Oi ps Load a DI Play m Stop 1004 1 Load a pl Play m Stop Video Offset Loop Video Offset 1 Loop El Dil de9C W Lock E 3 T Lock I E Water degC Data Offset J Data Offset Aux psi Display Mode Display Mode Fle Dual Display on Monitor 1 Scale C a f gt Scale i Video Orientation Video View Video Orientation Video View As File Log Data View As File Log Data View T Brake C Rotated Forward M Lap Selection 1 Rotated Forward y C Rotated Backward TN C Rotated Backward Ei Flipped Flipped 5 Resize
53. t Parameters to achieve this Version 1 0 Page 26 O ETB Instruments LTD 2007 DigiDash Tools 13 Option tab 13 1 6 sensor settings Depending on the orientation in which your Digidash Logger unit is mounted you may need to use the G Sensor Settings options If the logger box is mounted across the car with the cable connections to the left and right of the car you should check the swap lat and long box to align them correctly If it is mounted upside down you may need to change the sign of either Lat or Long G Note that the DigiDash configuration allows you to correct for these orientation issues You should therefore only need to use this facility of DigiTools if one of your 2 files for comparison has not been properly configured in the dash 13 2 Speed correction By default the Digidash speed reading is calibrated to over read by 3 This ensures that it does not under read vital for legality on the road To return to the true speed check the 3 calibration box in the Speed box With the box unchecked you may be over estimating your speed on track good for your ego and for psyching out the opposition not so good for accurate analysis Version 1 0 Page 27 O ETB Instruments LTD 2007 DigiDash Tools 14 Exporting data 14 1 Printing or saving plots From the File tab you can save an image of the current contents of the plot area either by printing it Print to Device button o
54. te 0 Samples s Plot Progress Display Preferences Load File Save File v gt Print Plot lt Print to Device Al Best Sess Lap Time at MPH Theory s Ava Dit m Print to File bmp Select Laps to View and Overlay Lap Time Options Further Lap Analysis Sort Parameter Pion pent ua a Lap Time C Lap Selection rs gt lt bs Menu Control arica a Lap Selection 2 Lap Split and Segment Times S Selection 2 AD Panda Back to Main Menu Session Log 1 Lap 6 DataA ANNE en JE Splits Export Lap Send to ClipBoard Selection 1 oQ Session Log 1 Lap 4 DataA We can start to make the analysis clearer Firstly by unchecking the laps we are not concerned with only the segment or split times we are interested in are displayed Also we are mainly concerned with segment times rather than split times so we ll select Segment at the bottom of the window Note that by delselecting some laps only the selected laps are used to calculate the theoretical best lap Version 1 0 Page 32 O ETB Instruments LTD 2007 DigiDash Tools EI View Data ile ata iew larker Option lot Data Lap Times Data A Notes Data B Notes Track Map ircle Video Overlay Engine Analysis Fil D Vie Marker 0 Plot D Lap T Data AN Data BN Track M G Circle Video Overlay E Analy Load and Print Data Lap Times Data Set A Data A Lap Times Race 2 LogSession
55. tive value on the plot which can be useful to move it to an area of the plot that is not as cluttered as the O n range The 0 5 reading is a theoretical range and is dependant on the full travel of the potentiometer sensor Typically when installed on the car the sensor will not travel through its full range so you may for instance see only a range of 1 5 4 3 in the data You may find it more useful to display this data as 0 100 of available range To do this you should use the following formulae Scaling factor 100 max reading min reading Offset 1 min reading scaling factor If the trace is upside down compared to how you would prefer to see it perhaps the TPS trace goes down as the throttle is opened rather than up multiply the scaling factor by 1 Version 1 0 Page 40 O ETB Instruments LTD 2007 DigiDash Tools 19 Data Features This section describes the various data variables logged by the DigiDash and available for plotting by Digitools The variables are divided into a number of tabs within the data tab For each variable you can select the display colour for the variable plot for each of the 2 data sets You can toggle the plot of the variable on or off by checking and unchecking the corresponding tick box 19 1 Pro tab 19 1 1 RPM Engine RPM as measured by the DigiDash If the values logged here are significantly different to those you would expect the DigiDash may not be properly conf
56. to avoid differences caused by corners driving technique hills etc Version 1 0 Page 25 O ETB Instruments LTD 2007 DigiDash Tools 12 Lap times tab 12 1 Distances amp average distance In the lap times tab of the right hand pane the information on each lap includes the Distance recorded for that lap At the bottom right of each file s information is the average distance for all laps When considering lap times check that the lap distance is close to the average sometimes due perhaps to interference from another car or poor positioning of the sensor or beacon the lap will be triggered by a different beacon on the pit wall or may even miss the beacon for a lap leading to a double length lap Checking the lap distance ensures that you are examining a full valid lap rather than one that is significantly shorter or longer than the real lap length 12 2 Split times Segment times deltas At the bottom of the lap times tab there is a set of radio buttons that affect the data displayed in the split sec columns in the main data tables 12 21 Split Segment times Split times show the cumulative lap time at each split point for each lap Segment times show the time taken to cover the distance from one split point to the next 12 2 2 Sorting Laps Sometimes it is helpful to see the laps in a session sorted by lap time or by segment time to see the best time and the spread of times below that Use the Sort check box and Sor
57. truments LTD 2007 DigiDash Tools The key in the bottom right of the plot area explains that in red segments lap selection 2 lap 5 is slower than lap selection 1 lap 4 The thickness of the line indicates the relative differences in lap times thicker is more difference As we have seen from the lap chart lap 5 is slightly faster in the first segment slightly slower in the second segment but loses most of its time in the final segment We can get a more detailed view and perhaps arrange the split points in more convenient positions by altering the number of split points and therefore segments return to the lap times view and alter the number of splits in the lap split and segment times area at the bottom of the screen Returning to the track map we get the following P View Data File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis Load and Print Data Track Map Data SetA Plot G Mode Load Data Set A File Race_2_LogSession_2 dig Cicuit Lap Sprint Hill Data Set A loaded from Race_2_LogSession_2 dig Grid Style Off Sample Rate 20 Samples s C Lines Dotted Lines Data Set B Source Load Data Set B GData Data Set B loaded from C GPS Data LELEN Track Map Lap Sample Rate 0 Samples s C Selection 1 Selection 2 Plot Progress Options Overlay Tracks Display Preferences jv Selection 2 Dotted Trace Loa
58. ust as the brakes are applied at the end of the preceding straight shows 106 4MPH and 12 01seconds The black Delta figures show that between these 2 markers the car lost 64 46 MPH over the course of 3 72 seconds This might be useful information for assessing how efficient the car s brakes or the driver s use of them are You can use similar marker techniques for measuring acceleration times G loadings etc Version 1 0 Page 15 O ETB Instruments LTD 2007 DigiDash Tools 6 1 Maximum minimum and average statistics At the bottom of the Marker tab is the Statistics area This is only available if the X axis is set to Time e g not distance etc You can use this facility to see the maximum minimum or average of any one of a number of data features in each of the selected data sets You can choose to measure the statistics either across the whole selection or just the data currently visible in the plot area see Zoom and Pan section for how to narrow down the visible data set TIP This feature is useful for instance for very quickly seeing how hard a session has been on the car What were the maximum revs has the driver buzzed the engine What was the maximum oil and water temperature What was the minimum oil pressure during a lap What was the average lap speed The statistics can show you this information far more quickly and accurately than looking through the data and placing markers 6 2 Labels
59. ve laps you can uncheck the tick box at the left of that row This lap will then not be included in calculation of any of the statistics View Data BE File Data View Marker Option Plot Data Lap Times Data A Notes Data B Notes Track Map G Circle Video Overlay Engine Analysis View Options Lap Times Plot Data A Lap Times Race 2 LogSession 2 dig Data All Plot Data C Lap Overlay Plot Area Windows Iv F 19351 1 1 1 1936 0 1 1 1933 4 Beacon Position Adjust Distance m Best Sess Lap 4 Time 53 14 at 81 97 MPH Theory 51 23 lt AvgDist 1927 0 m Plot Data Options F1 Help ata Zoom and Pan A SU Full C Zoom Box Zoom Pan C Pan Axis 1 Pan Axis 2 C Pan Axis 1 Horiz Only C Pan Axis 2 Horiz Only v C Pan AH lt gt D GEMINI E Best Sess Lap Time ati MPH Theory s Avg Dist m Axis Options e E E A E Select Laps to View and Overlay Lap Time Options Further Lap Analysis 4 Y Axis AutoScale Select Ces isa Sot Parameter a F ap Time C Lap Selection Select Lap for Overlay cs Da z 5 Data Smoothing S S C Lap Selection 2 5 A Lap Split and Segment Times Smooth RPM X Selection 2 o Split Select Lap for Overlay X pms Export Lap Filter when Data Loaded C Segment Version 1 0 Page 8 O ETB Instruments LTD 2007 DigiDash Tools Using the Lap Time Options pane you can choose whether the split times are used to
60. ysis View Options Plot Plot View Lap Overlay Data A Race 2 LogSession 2 dig 1 y A G T j YA A E Fi Data C All Plot Data T4 Lap Overlay ANITA aT NU A Plol indov Vv i 100 lv Beacon Position Adjust 804 j 0 Distance m di Plot Data Options F1 Help 60 Zoom and Pan 1 au Full Zoom Box vel ce Zoom Pan 4 C Pan Axis 1 4 C Pan Axis 2 1 C Pan Axis 1 Horiz Only an C Pan Axis 2 Horiz Only C Pan All C Pan All Horiz Only Axis Options lv Y Axis AutoScale Select r S Press F1 for Function Key Help Data Smoothing Sel 1 Log 1 Lap 4 Data A Sel 2 Log 1 Lap 5 Data A RPM se xis 108 58 at 12 90 _Smooth SolidLine 7 Visible T Visible Sel 1 lt Log 1 Lap 4 Data A Time 53 14 Cc T Time s E T Filter when Data NN Dotted Line Sel 2 Log 1 Lap 5 Data A Time 53 31 C Points E This mini G circle plot comes into its own when combined with markers Switch on the markers in the Marker tab in the left hand pane as described in the Markers and labels section and as you drag a marker across the data the corresponding point on the G circle is highlighted by a spot of the same colour By moving the markers back and forth especially around transition areas between braking and acceleration you can see how efficiently the tyres are being used by the driver Ideally the

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