RAC Plus II Manual - JAMAR Technologies
Contents
1. should be between 500 and 1 200 If your cali Your calibration bration number is below this range you need to use number should be a higher division factor such as 16 on the Modular ie Di a x A R y u Distance Sensor MDS Of course if your calibra need to adju i the tion number is too high you can lower the number rotary switch on by using a lower number such as 1 on your MDS your MDS This 1s done by adjusting the rotary switch on the MDS so the slot points to 1 2 8 16 32 or 64 Any time you adjust the rotary switch setting you must re calibrate to get the correct calibration number Changing the switch setting will not change the calibration number only the number of pulses being received by the RAC Refer to the Adjusting the Vehicle Speed Sensor Pulse Rate section in Chap ter 2 for more information on this Several calibration runs may be necessary to determine which division factor is best for your vehicle Chapter 3 Calibration If Your RAC Fails to Calibrate If your RAC fails to count during calibration perform the following op erational checks Step 1 Locate the Sensor Test button on the front upper right of the MDS shown in Figure 3 5 When pressed this will gen erate an internal low level signal that 1s fed directly into the VSS Input circuit First unplug the VSS Input connector from the right side of the MDS Second Fig 3 5 Sensor Test turn on the RAC and press the CH key2. RAC Plus User s Manual LIMITED WARRANTY JAMAR Technologies Inc warrants the RAC Plus series instruments for a period of five 5 years limited warranty against defects in material and workmanship as follows first year parts and labor years two through five parts only flat labor charge Sensors cables connectors brackets and other hardware are warranted for ninety 90 days JAMAR Technologies Inc warrants each new instrument manufactured by the company to be free from defective material and workmanship and agrees toremedy any such defect At its option it may furnish a new part in exchange for any part of any instrument of its manufacture which under normal installation use and service discloses such defect The instrument must be returned to the JAMAR factory or authorized service agent intact for examination with all transportation charges prepaid This warranty does not extend to any products which have been subject to misuse neglect accident incorrect wiring not our own improper installation or use in disregard of instructions furnished by JAMAR This warranty does not extend to products which have been repaired or altered outside the JAMAR factory or authorized service agent In no event shall JAMAR Technologies Inc be liable for any damages arising from the use of this product including damages arising from the loss of information This warranty is in lieu of all other warranties expressed or implied and no rep
3. By observing a few simple precautions you will be able to eliminate potential problems Do not install wires near any object that could cause stray pulses to be picked up such as the alternator spark plugs or engine coll Do not install the wires or sensor near any objects that will get hot such as the manifold The installation wires or sensor can melt if they are too close to a heat source Do not install wires near any objects that could vibrate and cut the wires Tire pressure should be the maximum suggested by the tire manu facturer typically 32 35 PSI cold The tire should have ample tread depth Steel belted radial tires are highly recommended Drive the vehicle 3 to 5 miles depending on climate to warm the tires up to normal operating temperatures prior to calibrating your RAC Refer to Chapter 3 Calibration for more detailed instructions Chapter 2 Installation Installing the Modular Distance Sensor Most vehicles 1992 and newer have an electronic speed output rather than a mechanical speedometer cable coming from the transmission With these vehicles you will need to install either a Modular Distance Sensor MDS Vehicle Kit or a Modular Distance Sensor Quick Kit Use the following instructions for installation of the MDS Kits 1 Find a location under the vehicle dashboard that will allow fairly easy access to the MDS Do Not mount the MDS on the heater ducts or where the heater vents will blow d
4. bridges pavement markings telephone power poles pedestals etc The numeric code can be up to four 4 digits in length This feature makes the RAC Plus II ideal for road inventories outside plant inventories asset management and engineering Step 1 Press the Menu key then the 6 key D 2 then indicates that you are in the Memory Store function Fig 4 16 Memory Store Step 2 Press Enter D 1 displays the last date that was used in the memory store func tion Note There 1s no check to ensure that a valid date 1s entered or correct If you want to enter a new date press the CLR clear key then using the Fig 4 17 Enter Date numeric keys enter the date you wish to use mm dd yy Step 3 Once you have keyed in a date press Enter D 2 will then display Other At this point you have the option of entering a number up to six digits that can be associated with the stored data This could be the inventory route number an operator identifier number etc It is not mandatory to key in a number If you do not want one leave the value set to zero Fig 4 18 Enter Optional Identifier 4 10 Chapter 4 Key Functions amp Operating Procedures Step 4 Once you have selected the identifier you want press Enter At this time 1f you wish to start at a distance other then Zero you can enter a starting distance using the numeric keys Fig 4 19 Enter Starting Distance Step 5 Press Ent
5. 1 key again to toggle back to distance This function does not interrupt the distance count IMPORTANT Once the RAC 1s turned off the clock timer shuts off and will reset to zero on the next power up Also note that the Count Hold does not stop the clock timer Menu 5 Distance Pulse Output DPO Note Use of the Distance Pulse Output feature with a Modular Distance Sensor MDS requires a factory modification to the MDS Contact us using the information on page ili if you need to use this feature with an MDS When activated the distance pulse output DPO will provide a 5 VDC TTL level output pulse at a pre selected distance interval and signal dura tion This low level signal is provided on the red wire in the power signal cable The 5 VDC signal can be used to send distance pulsed to a computer or other device that can accommodate low voltage low current signals Should you wish to control a 12 VDC high current device you will need our optional DPO Amplifier In addition to creating a DPO pulse at the pulse interval one byte of data 1s sent out on the RS 232 communications port This byte contains an ASCII S at 9600 baud This capability allows the RAC to effectively signal a PC or other type of unit at the leading edge of the DPO pulse CAUTION The DPO signal can be used to control potentially hazard ous equipment When activated the DPO could cycle this equipment at any time If you are working with this type of equip
6. BCS ssaa aaa 2 2 Installing the Modular Distance Sensor 2 3 Installing the RAC Instrument 2 7 Calibration LL tn 3 1 Automatic Calibration Procedure 3 2 If Your RAC Fails to Calibrate 3 5 Manual Calibration Procedure 3 7 Key Functions amp Operating Procedur S e00000000000000000000000000000000 4 1 RAC Plus Key Pune Ons Sidi a chine 4 2 RAC Plus Menu Functions 4 5 RAC Plus Additional Features 4 15 Troubleshooting sla 5 1 Frequently Asked Questions aaa aaa 5 3 AD DORE hote se Oe A 1 Connection and Output Formats iii A 2 OPECINCANONS lt lt sillaba A 4 CO M Sapia ill A 5 Vehicle Calibration Records A 7 1V Chapter 1 Introduction Chapter 1 Introduction to the RAC Plus amp Plus II RAC Plus User s Manual What are the RAC Plus and Plus II The JAMAR Technologies Road Analysis Computer RAC Models Plus I and Plus II are accurate easy to use distance measuring instruments DMI that use state of the art microprocessor technology The RAC Plus I and RAC Plus II DMIs have been designed with features to provide you with a versatile and functional instrument that can be learned in a very short time The RAC Plus IT contains all of the features of the RAC Plus I with the addition o
7. If available try another RAC and repeat the Tap Test If the second RAC doesn t count the problem has to be the cable between the MDS and the RAC Once the test is complete return the Rotary Switch to the previous position S If after checking these items the RAC still does not count contact us using the information on page 111 Q My RAC counts while the vehicle is not moving What s wrong A There are three possible causes for this 1 Your wiring may be picking up stray pulses from the vehicle This can occur if the wiring is too close to the alternator spark plugs distributor cap or engine coil 2 Your ground wire may not be connected properly Double check its connections 3 Your Modular Distance Sensor may not be working correctly Contact JAMAR using the information on page ili for information on getting replacement parts 5 3 RAC Plus User s Manual Q My RAC will not turn on What s wrong A There are several possible causes for this 1 You may have a loose connection Double check all connections at the MDS and RAC to make sure they are tight and at the correct locations 2 There may be a problem with the telephone jack on the power signal cable Check to make sure the contacts are not bent 3 Check the fuse between the MDS and the battery If the internal filament 1s broken the fuse has been blown Q My RAC counts in increments of 2 5 10 etc What s wrong A Your calibration number is
8. RAC will provide a tone and automatically begin counting up The Sub key is also used in the Menu function to scroll down through the various options and is used in the Pre Distance function to subtract a desired distance from the displayed distance The Dim key allows you to select from four 4 levels of display brightness to best suit the ambient light conditions Full bright is best for daylight conditions while full dim may best suit night conditions Each time the Dim key is pressed the brightness will drop one level until the lowest level is reached It will then jump back to the high brightness level Both D 1 and D 2 as well as the LED indicators are controlled by the Dim key The Clear key is normally used to clear the D 1 distance display as well as the Interval Distance in D 2 if that function has been selected Clear can be used on the run while measuring which allows you to establish a zero starting point without having to stop your vehicle in traffic or the center of a busy intersection Clear will not reset the Time Counter in normal mode The Enter key instructs the RAC to accept the previously keyed value currently on the display It is also used in the Menu func tion and Interval Distance application The numeric keys are used to identify menu options and select numbers desired for calibration pre distance distance pulse output clock set etc Chapter 4 Key Functions amp Operating Procedures RAC Plus M
9. a test measurement with your vehicle Once your RAC has been calibrated you should perform a test measurement over a known distance This will ensure that the instrument has been calibrated correctly To do a test measurement drive to your starting point and stop Turn on the RAC and wait until zero is shown on the larger upper display and CH is shown on the smaller lower display Next press the CH count hold button to release the instrument from count hold and then drive the distance to be measured Stop and or press the CH button once you reach the end of the distance to be measured Step 4 Familiarize yourself with the features and options of the instrument that you will be using Refer to Chapter 4 for more detailed instructions on the functions and procedures of the RAC Plus I or II Step 5 Practice Before attempting to use the instrument on a job be sure you are comfortable with how to operate it Chapter 2 Installation Chapter 2 Installation RAC Plus User s Manual Before You Begin Note The following instructions are for installing a RAC with a Modular Distance Sensor If you are installing a different type of sensor refer to the instructions that came with the sensor itself The JAMAR RAC Plus and Plus II distance measuring instruments DMI are very reliable instruments However there can be some external variables that could affect proper operation and the ability to accurately measure distance traveled
10. represents the number of pulses received over a set distance This number once cal NI o culated will remain accurate until a change to Your RAC Plus must the vehicle occurs such as different size tires are be calibrated in put on the vehicle tire wear tire pressure change order to accurately etc Such changes will require a re calibration in measure distance order to maintain proper accuracy The RAC Plus has the ability to store four 4 separate vehicle calibration numbers in memory This simplifies sharing one instrument between up to four different vehicles In order to calculate the calibration number for your particular vehicle you must first establish a calibration course The length of the course can be any known distance more than 500 feet One thousand feet is ideal but the course can be any distance over 500 feet for example 623 feet from pole to tree Your course should be straight and accurate so take the time to measure the course using a 100 tape or hand wheel Mark the beginning and ending points so they can be seen from inside your vehicle Remember the course length can be any accurate distance over 500 feet so for convenience you could use a telephone pole or other marker as reference point Note If you are using the Metric unit of measuring laying out the calibration course in feet is required to obtain the most accurate cali bration number Step 1 Slide the ON OFF switch to ON Your RAC will perform
11. the course stop your next page vehicle so you are exactly aligned using the same reference point in the vehicle with the end course marker Step 6 Press the CH key The calibration factor will then be shown in D 1 You should record the calibration number vehicle number and date in the Appendix of this manual on page A 7 It is also recommended that you put this same information on a piece of tape attached to the inside of the vehicle s glove box 3 3 Fig 3 4 Calibration Number Displayed RAC Plus User s Manual Step 7 Press Enter and the unit of measurement will return to your desired unit of feet mile or meter Press Enter again to exit the menu function and return to normal operation Your calibration number for the vehicle selected is now stored in the RAC s nonvolatile permanent memory The calibration num ber will stay in memory for more than 50 years or until you re calibrate or manually change the data You are able to view the calibration number and unit vehicle number every time you power up the RAC You should rerun the calibration course in the normal mode to verify the calibration for your vehicle Press the CH key prior to measuring If this is the first time you have calibrated a DMI you may want to run the course a couple of times to practice being properly aligned when starting and stop ping at the course markers Important Ideally the calibration number used
12. too high The calibration number should be between 500 and 1 200 You can lower the calibration number by adjusting the rotary switch on your modular distance sensor Refer to Chapter 2 for more detailed information Appendix RAC Plus User s Manual Connection and Output Formats Power Connector mi Pin 1 Yellow 12 VDC Pin 2 Green Sensor Input Pin 3 Red DPO Pin 4 Black Signal Ground 4321 Memory Serial RS 232 Output Since the RAC Plus II has internal memory of up to 3500 events it is not practical to try to view the data on the display on an event by event basis It is necessary to download this data to a computer for processing The output format of the RAC Plus II is a binary format which means it cannot be read with standard text capturing software as could be done with earlier RAC models The JAMAR WinRAC Plus software is designed to retrieve the data from the RAC Plus II and generate a report showing the data collected in the field You can also save the data in a variety of standard formats Excel spreadsheet Access database comma delimited text file so that you can work with the data using your own software The software is Windows based and is compatible with all Windows ver sions 98 and higher You need a custom cable available from JAMAR to interface the RAC Plus II to your computer The WinRAC Plus software has the following features Reads directly from the RAC Plus II Converts event codes
13. a brief Self Test The current calibration number will be shown in the larger upper display D 1 and CF U vehicle 1 2 3 or 4 in the smaller lower display D 2 This 1s displayed for 3 4 seconds while a tone sounds then 0 is shown in D 1 0 000 if the mile or meter unit of measure ments is selected while CH is shown in D 2 Fig 3 1 Calibration Display on Start up 3 2 Step 2 Press the Menu key the 1 key and Enter At this point the unit of mea surement will automatically change to feet You can then select the vehicle number that this calibration will be for by using the through 4 numeric keys Step 3 Once the vehicle number has been se lected press Enter Key in the course length in feet to be used for the cali bration using the number keys then press Enter again Step 4 Chapter 3 Calibration Vehicle Number Selection Fig 3 3 Enter Course Length Using a reference point on your vehicle 1 e the window post door handle your shoulder etc align your vehicle to the beginning course marker Step 5 Press the CH key and drive away As you drive the pulses received from the vehicle are being shown in D 1 This is not the distance being traveled so don t panic when the display doesn t equal the actual length of your calibration course If your RAC does not count during the calibration procedure refer to the trouble shooting section on the When you reach the end of
14. been activated Fig 4 12 DPO Activated Step 6 Press Enter to return to the initial menu screen then press Enter again to exit the menu function You are now back in the normal mode with the DPO signal set Chapter 4 Key Functions amp Operating Procedures To turn off the DPO signal Step 1 Press the Menu key the 5 key then Enter The current DPO interval dis tance is then displayed in D 1 Fig 4 13 Current DPO Distance Step 2 Press the CLR clear key and the DPO distance is removed Fig 4 14 DPO Distance Cleared Step 3 Press the Enter key and D 2 will then indicate that the DPO signal has been deactivated Fig 4 15 DPO Deactivated Step 4 Press Enter to return to the initial menu screen then press Enter again to exit the menu function You are now back in the normal mode with the DPO signal turned off Note When the RAC 1s turned off the DPO distance interval duration resets to zero 0 thereby deactivating the output If you turn the RAC off you must reset this 1f you want the DPO to be activated again RAC Plus User s Manual Menu 6 Memory Store Note This option is only available with the RAC Plus II It is not available in the RAC Plus I The RAC Plus II has the unique and exclusive capability to store 3500 events in its internal memory In addition you are able to manually key in numeric codes to identify various events such as intersections signs culverts
15. ble without obstructions It is most common to mount the RAC to the front of the dashboard using the Velcro provided Two plastic L brack ets are also provided to facilitate mount ing to the top of the dashboard 1f that 1s your preferred location For best results attach the L bracket so that the bottom of the L is facing away from the RAC as shown in figure 2 7 Fig 2 7 L Bracket Side View Using the two L brackets allows you to compensate for curved dashboards even if it requires the RAC to be mounted on a left or right slope NEE 506 99 0 66 G00 ae Fig 2 8 L Bracket on Curved Dashbaord After mounting the RAC plug the black cable from the MDS into the RAC You may want to consider allowing enough slack in the cable to permit a passenger to hold operate the RAC if necessary Regardless of the mounting location Velcro strips are provided for quick easy mounting amp removal of your RAC Once you have mounted your RAC and connected it to the MDS proceed to the calibration instructions in the following chapter 2 7 RAC Plus User s Manual 2 8 Chapter 3 Calibration Chapter 3 Calibration 3 1 RAC Plus User s Manual Automatic Calibration Procedure In order to accurately measure distance your RAC Plus must know the exact distance that the vehicle will travel based on pulses from the vehicle s speed sensor The calibration number is the automatic calculation that
16. d as with other interface sensors This gets the MDS out of a severe heat and moisture environment and into a more controlled environment Third our exclusive internally generated Sensor Test and Tap Test features allow the user to verify proper sensor and instrument operation Finally the modular design simplifies installation Older vehicles with mechanical speedometer cables use the mechanical transmission sensor which is screwed on to the transmission For infor mation on how to install this type of sensor refer to the instructions that came with the sensor The next chapter details how to install a modular sensor into your vehicle If your already have a sensor installed you may skip to Chapter 3 for infor mation on calibrating your RAC 1 3 RAC Plus User s Manual Quick Start Guide The RAC Plus I and II DMIs will allow you to accurately measure distance quickly and easily However before you can do this a few basic steps must be taken to ensure that you get the optimum performance from your in strument Step 1 Install your RAC and its modular sensor Refer to Chapter 2 for detailed instructions on this If you would like to have the equipment professionally installed contact a garage or speedometer shop in your area Step 2 Calibrate your instrument Refer to Chapter 3 for detailed instructions on how this is done Your RAC will not accurately measure distance unless it is properly calibrated Step 3 Perform
17. d doesn t matter as long as it did count If the RAC did count everything from the MDS up to the RAC is okay and the problem is most likely a poor connection at the vehicle s speed sensor Make sure you have a good electrical connection at the tap in point Once you are sure you tapped into the correct location it is always better to wire solder the connection After checking the connection plug the VSS Input connector back into the MDS and try the RAC again 5 2 Chapter 5 Troubleshooting 4 Perform a Tap Test The Tap Test will determine if the distance pulses being sent from the MDS are getting to and being processed by the RAC The Tap Test is performed using the rotary switch on the MDS First make sure you note the current position of the rotary switch 1 2 4 8 16 32 or 64 as you will have to return the slot back to this same position after the test is completed Next turn on the RAC Press the CH key just like you were beginning to measure Using a small screwdriver rotate the switch between the Tap and Test positions four or five times Note that when the switch is turned clockwise until it stops it is at the Test position The RAC should register The count shown does not matter just as long as the RAC did register a count If it did count the cable from the MDS to the RAC and the instrument itself are OK If the RAC did not count the problem is most likely a bad cable to the RAC or the RAC itself is bad
18. emory 4 14 Chapter 4 Key Functions amp Operating Procedures RAC Plus Additional Features Interval Distance This feature allows you to determine distance between points of interest such as telephone poles signs pavement markings etc You can activate Interval Distance at any time as long as you are in the normal measuring mode and not using the menu functions Step 1 To activate the Interval Distance fea ture press the 4 key The INT DIST LED indicator will then light D 1 will be used to show the actual travel dis tance while D 2 will be used to show Fig 4 28 the Interval Distance Interval Distance Activated Step 2 As you pass each reference point press the Enter key D 1 continues to show overall distance travelled while D 2 will lock on the current interval distance Each time the Enter key is Fig 4 29 pressed D 2 will update to the most Interval Distance Displayed recent interval distance There is no limit to the number of times you can use the Enter key to update the inter val distance display Step 3 To exit the Interval Distance feature press the 4 key Note If speed is already being displayed in D 2 Interval Distance will take precedence over speed until the Interval Distance feature is ended 4 15 RAC Plus User s Manual 4 16 Chapter 5 Troubleshooting Chapter 5 Troubleshooting RAC Plus User s Manual Frequently Asked Questions Q My RAC wi
19. enu Functions The Menu key of the RAC allows you to select from a variety of functions After pressing the Menu button the Add and Sub keys can be used to scroll through the options which are displayed in D 2 To select an option press the ENT Enter key Menu 1 amp 2 Calibration Procedures Refer to Chapter 3 Calibration for full details on calibration procedures Menu 3 Pre Distance The Pre distance feature will allow you to enter a known distance starting point other than zero It could be where you left off before lunch or just beginning at a known station This feature also allows you to Add or to subtract off a distance currently on display in D 1 Note The RAC must be in Count Hold to use Pre Distance Step 1 Press the Menu key the 3 key then the Enter key At this point the unit is ready to have a distance entered Step 2 Using the numeric keys key in the desired distance up to 6 digits then press Enter Step 3 Fig 4 3 Distance Entered Press Enter to return to the initial menu screen then press Enter again to exit the menu function You are now back in the normal mode with the distance set to the value you entered Fig 4 4 Normal mode w Pre distance set Note If you just want to add to the distance already on display in D 1 in Step 2 rather than pressing Enter press the Add key To subtract from the current distance press the Sub key 4 5 RAC Plus User s Manual Me
20. er and the RAC will be ready to begin at the starting distance you entered Fig 4 20 Ready to begin survey Step 6 Align your vehicle with the starting point of the survey We recommend that you enter a starting code number of up to four digits such as 1111 and press the Enter key This stores the starting reference code and distance Fig 4 21 in memory Enter Starting Reference Code Step 7 Press the CH key to release the Count Hold The distance in D 1 will begin to count once the vehicle begins to move The four digits in D 2 display the numeric code numbers as they are keyed in Using a numeric code 0 9999 you are able to identify up to 10 000 separate events for inventory purposes For example an intersection to the right might be a 1 to the left a 2 a bridge a 6 a telephone pole a 7 a power pole an 8 a culvert a 22 a 45 mph speed limit sign a 45 a municipal boundary line a 500 etc As you see the event ahead of you key in the code number using the numeric keys The number will appear in D 2 When you reach the event using a i reference point on the vehicle press Fig 4 22 Enter Event Codes 4 11 RAC Plus User s Manual Enter The event code distance speed and time elapsed or real are stored in memory There is a short delay 1 2 second when you press Enter before you can key in another event code However the code you entered 1s written to memory at the instant you press En
21. f memory storage and data output This allows for saving of in formation for later download to a computer Ej LJ RAC Plus 666 Fig 1 1 RAC Plus I and RAC Plus II Distance Measuring Instruments 1 2 Chapter 1 Introduction How do they work To use the RAC Plus I or Plus II DMI to accurately measure distance either a modular distance sensor MDS or mechanical transmission sensor is used to send pulses to the DMI The Quick Kit which is a modified version of the MDS can also be used Most newer vehicles 1992 and newer have an electronic distance speed sensor inside the transmission which sends pulses to the vehicle s on board computer for use in the speedometer ABS braking system engine transmission control etc These vehicle generated signals can be as many as 100 000 pulses per mile which 1s far more than the RAC needs to ac curately measure distance Further since the vehicle manufacturers are not concerned with accurate distance and speed readings at very low speeds your speedometer may not move below 5 mph the signal strength at these low speeds 1s extremely minimal The MDS 1s not just an improvement over other electronic interface type sensors First and foremost its proprietary circuitry allows more accurate slow speed measurements by sensing signals as low as 10 Mv from the vehicle speed sensor Second it is designed to be mounted under the ve hicle dashboard rather than under the hoo
22. ge enough for both the VSS cable and the 12 Volt Ground wires EXTREME CAUTION must be taken to insure you do not drill into anything mounted on the opposite side of the firewall or cut any existing wiring Use the cable ties provided while routing the cable to the location for getting the speed signal that you previously identified Attach the red and black wires of the VSS cable to the vehicle s speed sensor wires using the tap splice connectors provided The red wire goes to the high speed signal wire the black goes to the low speed signal wire or chassis ground NOTE The tap splice connectors are supplied for convenience for ini tial installation However we recommend that once the installation is completed and you have verified the instrument is working properly remove the tap splice connectors and solder the connections Insulate using electrical tape or silicone Modular usi Distance Sensor Toni 4 Plug the connector of the VSS cable into the hole labeled VSS Input located on the right side of the MDS as shown in Figure 2 2 Fig 2 2 VSS Plug in 5 Route the black DMI cable from the MDS to the desired instrument loca tion This will usually be routed between the doorpost and the dashboard Make sure the cable will not be pinched when closing the door If the instru ment is going to be mounted to the front of the dashboard you may want to bring the cable straight up the front of the dash There is adequate cable len
23. gth to allow mounting the DMI in any desired location inside the vehicle Plug the cable into the MDS jack la F beled 70 DMI as shown in Figure 2 3 It does not matter which end of the cable is plugged into the MDS or DMI Fig 2 3 DMI Plug in Modular Distance Sensor 6 Route the Red 12 Volts and Black Ground power cables directly to the vehicle s battery This can be done using the same feed through lo cation that was used for the VSS Cable If out of convenience you elect to obtain the 12VDC and ground from a fuse panel or other location under the dashboard make sure it is a constant 12 volt source and not one that 2 4 Chapter 2 Installation is switched off with the ignition key We also recommend the circuit should have as few devices as possible to avoid voltage fluctuations from Turn Signals ee Brake Lights etc Plug the power cable into the hole labeled Power on the MDS as shown in Figure 2 4 Modular muse Distance Sensor Fig 2 4 Power Plug in A diagram of the complete installation for the MDS 1s shown in Figure 2 6 on page 2 6 Adjusting the Vehicle Speed Sensor Pulse Rate The signal pulses coming from the vehicle speed sensor are generated for use by the vehicle s computer engine transmission control fuel management ABS brakes etc The pulse rate can vary from 4 000 to in excess of 100 000 pulses per mile The MDS will condition and amplify these pulses for use by t
24. he DMI Since the higher pulse rates are not required for accurate distance measurements the MDS incorporates a divider circuit to reduce the pulse rate This is done by adjusting the rotary switch on the front of the MDS as shown in Figure 2 5 Bi Modular Em Distance Sensor Fig 2 5 Rotary Switch Adjustment Although your particular vehicle may vary generally Chrysler and Ford vehicles use a 4 to 1 ratio position 4 on the switch while General Motors vehicles use a 16 to 1 ratio position 16 on the switch To adjust the ratio use a small screwdriver to rotate the switch until the slot in the switch points to the desired ratio Note that when the switch is turned counter clockwise until it stops it is at the I to I ratio The adjustments go from 1 to 1 1 pulse into the sensor 1 pulse out through 64 to 1 64 pulses into the sensor 1 pulse out The Tap Test positions are explained in the troubleshooting section on page 3 4 You may need to adjust the ratio again based on the results of the calibration procedure described in Chapter 3 Any time you change the pulse ratio you will need to re calibrate the DMI Once you have installed the MDS install your RAC Plus using the instruc tions on page 2 7 2 5 RAC Plus User s Manual RAC Connector The number of pulses per mile from a vehicle will vary with the make and model Your calibration factor should be between 500 and 1 200 If not adjust the rotary s
25. ice which when installed condi tions pulses from a vehicle s speed sensor to the RAC Page 2 3 nonvolatile memory the permanent memory of the RAC it is where the data and calibration number are stored It will remain here for fifty years or more unless changed Page A 4 pulses signals generated by a vehicle which when conditioned through a sensor are read by the RAC to calculate distance traveled Page 1 3 pulse rate the frequency at which pulses are sent to the RAC They can vary from 4 000 to more than 100 000 per mile Page 1 3 P Dis Pre Distance menu function of the RAC it allows you to enter a known distance into the RAC Page 4 5 RAC Road Analysis Computer Brand name for JAMAR s distance measuring instruments SP Speed black button on the RAC it allows you to show your speed Page 4 3 Store menu function of the RAC Plus II it is used for the memory store procedure Page 4 10 to 4 12 Sub black button used to count down or subtract value from screen on the DMI Page 4 4 Unit gray button on the RAC it selects the desired unit of measurement from miles to feet to meters Page 4 3 WinRAC Plus software available from JAMAR for use with the RAC Plus II The program can analyze data downloaded from the RAC Plus II Page A 2 Vehicle Calibration Record Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odo
26. irectly onto it Attach the MDS using the nylon ties or Velcro provided as shown in Fig 2 1 Fig 2 1 MDS Mounted Under Dash 2 Locate the 2 wires coming from the Vehicle s Speed Sensor VSS On most Ford and Chrysler pick up trucks the best place is on the rear end differential housing using the rear ABS signal On 2005 and later Ford trucks connect at the top rear of the transmission tail shaft on 4x4 where the transmission meets the transfer case with the JAMAR red wire to the vehicle s blue yellow wire Leave the JAMAR black wire disconnected On General Motors pick up trucks the best place is the VSS at the transmission m e On many vehicles both trucks and autos All wires and the you can go to the cruise control signal or to MDS itself should the vehicle ECU which is often located under De kept away from the dashboard any heat source that could cause melting Note Vehicle wiring changes from year to year and model to model For technical support in locating the vehicle speed signal wire call JAMAR at 215 491 4899 Your local Auto Truck dealer can also usually tell you where the VSS can be located on your vehicle 3 Route the red and black end of the 20 grey VSS cable through the fire wall This can usually be done by using an existing rubber grommet where 2 3 RAC Plus User s Manual other wires pass through the firewall If you cannot locate an existing hole CAREFULLY drill a small hole lar
27. just like you would prior to starting a measurement Next using a small pointed object pen pencil screwdriver etc or your finger press the Sensor Test button for a few seconds The RAC should count when the button is pushed What number it counted doesn t matter as long as it did count Modular Distance Sensor If the RAC did count everything from the MDS up to the RAC is okay and the problem is most likely either a poor connection at the vehicle s speed sensor or the connection is not at the correct location to get the vehicle speed signal The speed sensor output is generally at the transmission or the rear differential If you are unsure about being attached to the correct output disconnect the plug and move the vehicle If the speedometer does not function you have chosen the correct plug wires If you are at the correct location make sure you have a good electrical con nection at the tap in point Once you are sure you tapped into the correct location it is always better to wire solder the connection After checking the connection plug the VSS Input connector back into the MDS and try the RAC again If the RAC counts you can proceed with calibration If the RAC still does not count go to Step 2 RAC Plus User s Manual Step 2 The Tap Test will determine 1f the dis tance pulses being sent from the MDS are getting to and being processed by the RAC The Tap Test 1s performed using the rotary switch shown i
28. ll not count What s wrong A In most cases when a RAC Plus won t count it is not the unit itself that has the problem It is usually a problem with the interface sensor or wiring Check the following 1 Ensure the RAC has a calibration number in memory The RAC will not count if there is not a number in memory As you switch on the RAC the calibration number will be displayed for about three seconds The factory uses 900 as the test number If no number is listed refer to the Manual Calibration Procedure on page 3 7 for information on how to enter a number 2 Ensure that you are attached to the speed sensor output It is generally at the transmission or the rear differential If you are unsure about being attached to the correct output disconnect the plug and move the vehicle If the speedometer does not function you have chosen the correct plug wires 3 Perform a Sensor Test Locate the Sensor Test button on the front upper right of the Modular Distance Sensor When pressed this will generate an internal low level signal that is fed directly into the VSS Input circuit First unplug the VSS Input connector from the right side of the MDS Second turn on the RAC and press the CH key just like you would prior to starting a measurement Next using a small pointed object pen pencil screwdriver etc or your finger press the Sensor Test button for a few seconds The RAC should count when the button is pushed What number it counte
29. ment TURN OFF the RAC which will deactivate the DPO signal To activate the DPO signal Step 1 Press the Menu key the 5 key then the Enter key At this point the RAC is ready to have an interval distance SM entered Fig 4 8 Enter DPO Distance 4 7 RAC Plus User s Manual Step 2 Using the numeric keys enter the interval distance that you want the DPO signal generated based on your selected unit of measurement feet mile meter Fig 4 9 DPO Distance Entered Step 3 Press the Enter key and you will be prompted to enter how long the DPO signal should last You can key in a desired signal duration from 10 milli seconds key in 1 to 2 55 seconds key k a in 255 Keep in mind that if you select Fig 4 10 Enter DPO Duration a long output duration your signals may run together at high speeds A 10 millisecond pulse duration is usually adequate for sending pulses to a laptop computer and will not overlap at normal highway speeds Step 4 Press Enter and you will be prompted to select whether or not you want an audible tone to sound when the DPO signal is triggered The 1 in D 1 signi fies that the tone is on If you want a tone with each output pulse leave 1 in D 1 If you do not want a tone enter zero 0 or press the Clear key Fig 4 11 DPO Tone On Step 5 Once you have selected whether you want a tone or not press Enter D 2 will then indicate that the DPO signal has
30. meter User Initials Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odometer User Initials Date Veh No Cal Factor Veh Odometer User Initials RAC Plus User s Manual A 8
31. mory 1s still available D 2 shows the number of surveys stored in memory 1 e Sur 2 means there are cur rently 2 surveys stored in memory Fig 4 25 Memory Percentage and Surveys Stored Step 3 Press Enter to return to the initial menu screen then press Enter again to exit the menu function You are now back in the normal mode 4 13 RAC Plus User s Manual Menu 8 Memory Erase Note This option is only available with the RAC Plus IT It is not available in the RAC Plus I This feature allows you to clear all memory locations that have been stored in the RAC Plus II Note that when doing this ALL memory locations are cleared You are not able to clear partial memory or selected surveys Step 1 Press Menu the 8 key and then Enter to access the Memory Erase function Erase will be listed in both D 1 and D 2 Fig 4 26 Memory Erase Step 2 Press Enter and D 1 will begin flashing to alert you that you are about to clear ALL surveys in memory Step 3 Press Enter again and D 1 will change to Done indicating that the memory has been erased Fig 4 27 Memory has been erased Step 4 Press Enter to return to the initial menu screen then press Enter again to exit the menu function You are now back in the normal mode Note If at any point prior to Step 3 you change your mind about erasing the memory just press the Menu key then Enter You will be returned to the normal mode without erasing the m
32. n figure 3 6 First make sure you note the cur rent position of the rotary switch 1 2 Fig 3 6 Tap Test 4 8 16 32 or 64 as you will have to return the slot back to this same position after the test is completed Bi Modular SL Distance Sensor Mai Next turn on the RAC Press the CH key just like you were beginning to measure Using a small screwdriver rotate the switch between the Tap and Test positions four or five times Note that when the switch is turned clock wise until it stops it is at the Test position The RAC should register The count shown does not matter just as long as the RAC did register a count If it did count the cable from the MDS to the RAC and the instrument itself are OK If the RAC did not count the problem is most likely a bad cable to the RAC or the RAC itself is bad If available try another RAC and repeat the Tap Test If the second RAC doesn t count the problem has to be the cable between the MDS and the RAC Once the test is complete return the Rotary Switch to the previous posi tion If the previous steps do not correct the problem contact us using the infor mation on page ill Manual Calibration Procedure It is very common to share one RAC on a plug in basis between a number of different vehicles that have been equipped to accept the instrument Installing additional vehicle kits on other vehicles is an inexpensive and cost effective means to greatly expand your meas
33. ng or at rest When pressed the distance will cycle from total feet to miles to kilometers meters The LEDs to the left of D 1 indicate which unit is currently being used The Speed key allows you to turn on or off the display of speed mph or kph in D 2 The display of speed 1s not interrupted by either the Count Hold or Display Hold keys The Menu key allows you to select from a variety of func tions After pressing the Menu button the Add and Sub keys can be used to scroll through the options which are displayed in D 2 To select an option press the ENT Enter key The options are Menu 1 Auto Calibration A CAL Menu 2 Manual Calibration E CAL Menu 3 Pre Distance P diS Menu 4 Clock Set CLoSEt Menu 5 Distance Pulse Output dPO Menu 6 Memory Store StorE RAC Plus II only Menu 7 Memory Status StAtUS FRAC Plus II only Menu 8 Memory Erase ErASE RAC Plus II only Menu 0 Return to Normal Operation rEturn See pages 4 5 to 4 14 for specific menu instructions The Add key instructs the RAC to count up It is also used in the Menu function to scroll up through the various options and is used in the Pre Distance function 4 3 RAC Plus User s Manual SUB 4 Subtract The Sub key instructs the RAC to count down When in this mode the LED indicator for the active unit of measurement will flash to indicate that you are subtracting distance Should you count down to zero 0 the
34. nique to each vehicle that represents the pulses from the transmission received over a set distance This number should be as near to 0 500 1 200 as possible and 1s necessary for the RAC to count Page 3 4 CLR Clear red button on the RAC that resets the distance or time to zero Page 4 4 CH Count Hold red button on the RAC which stops the computation of distance pulses Page 4 2 DH Display Hold red button on the RAC which stops the display but allows the RAC to continue accumulating distance internally Page 4 2 DMI generic industry term meaning Distance Measuring Instrument The RAC Plus I and Plus II are DMIS DPO Distance Pulse Output menu function on the RAC when acti vated it will provide a 5VDC TTL level output pulse at a pre selected distance interval and signal duration Page 4 7 to 4 9 EEPROM stands for Electronically Erasable Programmable Read Only Memory It contains the permanent memory of the RAC Page A 4 ENT Enter green button on the RAC it accepts any number keyed into the display Page 4 4 Erase menu function of the RAC it is used to clear all memory locations in the RAC Page 4 14 RAC Plus User s Manual Glossary LED stands for light emitting diode the display used with the JAMAR RAC Plus series Page A 4 Menu yellow button on the RAC which is used to access many of its operation functions Page 4 3 Modular Distance Sensor MDS a dev
35. nt number Fig 3 9 Calibration Number Cleared Step 4 Using the numeric keys key in the de sired calibration number for the vehicle selected Step 5 Press Enter to return to the initial menu screen then press Enter again to exit the menu function The new vehicle number and or calibration number 1s stored in memory and the RAC is back to normal measuring mode Fig 3 10 New Calibration Number Entered Once your DMI is properly installed and calibrated you are ready to begin accurately measuring distance 3 8 Chapter 4 Key Functions amp Operating Procedures Chapter 4 Key Functions amp Operating Procedures RAC Plus User s Manual RAC Plus Key Functions na JAMAR eer MILE METER RAC Plus i CH L OH l r a0 CS Grd TOMI rI 0 0 Fig 4 1 RAC Plus Key Layout Your RAC Plus series DMI has been designed for simple operation using large individual keys which provide a click and tone feedback The two 6 digit high intensity LED display windows exclusive to the RAC Plus series allow flexibility in displaying data to you The upper larger display window referred to as D 1 is primarily used to display distance It is also used to indicate menu locations and time The lower smaller display window referred to as D 2 is used to display count status speed interval distance menu descriptions event codes Plus II only etc OFF ON This 1s the slide switch which p
36. nu 4 Clock Set The RAC Plus will compute amp display time as either elapsed time from when the instrument was powered up or real time 1f the timer has been set The timer starts automatically at zero when the RAC 1s powered up Time is displayed in D 1 as hh mm ss To View Elapsed Time Press the Menu key then the 4 key then the Enter key D 1 shows the elapsed time since the RAC was pow ered on At this time you can stop and reset the timer with the CLR clear key or just let it continue to run To return to normal mode press the Menu key then the Enter key Fig 4 5 Elapsed Time To Set Timer to Real Time Step 1 Press the Menu key then the 4 key then the Enter key D 1 shows the elapsed time since the RAC was powered on as shown in Figure 4 6 above Step 2 Press the Clear key Using the number keys key in the time you wish to dis play hh mm ss format This can be either 12 or 24 hour format 1 e 1 PM 1 13 hrs Fig 4 6 Clock Time Entered Step 3 Wait until the keyed in time is reached and press the Enter key to begin the clock counting Fig 4 7 Counting from Entered Time Step 4 To return to normal mode press the Menu key then the Enter key Chapter 4 Key Functions amp Operating Procedures Note To view the Clock Timer while in the normal measuring mode not as a Menu function press the 1 key D 1 will then display the clock timer in hh mm ss format Press the
37. r Add Subtract desired distance value from current distance display Interval Distance Display of distance between selected events amp total distance Distance Pulse Output 0 5 VDC low going high user selectable interval and duration Sensor Error Detection Checks for sensor error due to vehicle s dynamic mo tion Memory Retention Non Volatile EEPROM for calibration amp vehicle numbers 50 years retention Circuitry Solid state surface mount modular EEPROM micro computer Case ABS non warping plastic Dimensions 7 8 W x 2 3 H x 1 2 D Weight 6 5 oz Operating Temperature 0 C to 75 C Warranty 5 year instrument warranty Example JAMAR Technologies RAC Plus I RAC Plus Il Specifications In addition to the above Memory Storage up to 3500 Event locations 0 9999 Event code identifiers Distance Time amp Speed Memory Retention Non volatile EEPROM calibration amp vehicle numbers Data Output Serial RS 232 Example JAMAR Technologies RAC Plus II A 4 Glossary Refer to the page number listed after each entry for more information Add black button used to count up or add value to the screen on the RAC Page 4 3 Dim blue button on the RAC it is used to change the brightness of the display Page 4 4 calibration course known distance used when calibrating the RAC One thousand feet is ideal but it should not be less than 500 feet Page 3 2 calibration number a number u
38. resentative or person is authorized to assume for JAMAR Technologies Inc any other liability in connection with the sale or use of JAMAR products JAMAR Technologies Inc reserves the right to make improvements on the product and or specifications at any time without notice Questions concerning this warranty or any JAMAR Technologies Inc product should be directed by e mail mail or telephone to JAMAR Technologies Inc 151 Keith Valley Road Horsham PA 19044 215 491 4899 sales jamartech com Copyright 2006 by JAMAR Technologies Inc 11 Table of Contents If you have any questions about the use of the RAC Plus devices please call the following number 1 215 491 4899 Monday Friday 8 00 AM to 5 00 PM Eastern time You may also contact us by e mail at sales jamartech com For more information on our products or for the latest news in product development visit our web site at www jamartech com For support information specific to the RAC Plus devices go to www jamartech com RACPlusSupport htm Address any correspondence to JAMAR Technologies Inc 151 Keith Valley Road Horsham PA 19044 1411 Volume 1 2 May 2006 111 RAC Plus User s Manual Table of Contents Technical Support UHR MAR ill Introduction to the RAC Plus I and Plus IT 1 1 What are the RAC Plus I and Plus IF 1 2 How Do They WORD siena 1 3 QuickStart GUIdE sssrinin AM dd 1 4 Installation is halo aji 2 1 BelOre VOW
39. rovides power to the RAC Plus When turned on the RAC will do the following 1 Initiate internal Self Test sequence OFF ON 2 Display calibration number in D 1 and vehicle number in Count Hold D 2 along with a 3 second tone 3 Set itself in Count Hold with CH displayed in D 2 4 Set the unit of measuring feet mile meter and the vehicle number to be the last one used when the RAC was turned off 5 Set itself to count up 6 Set the Distance Pulse Output interval to zero The Count Hold key will start or stop the computation of dis tance pulses When in Count Hold CH will be displayed in D 2 and the RAC will not accumulate any distance If speed is also being displayed it will continue as CH does not stop the computation of vehicle speed When released CH in D 2 will go out and distance computation will resume Display Hold Speed Menu f ADD Add Chapter 4 Key Functions amp Operating Procedures Display Hold will stop the display from updating while the RAC will continue to accumulate distance internally When in Display Hold DH will be displayed in D 2 If speed 1s also being displayed it will continue as DH does not freeze the speed display Note You cannot put the RAC in both Count Hold and Display Hold at the same time Count Hold will take precedence over Display Hold The Unit key allows you to select the desired unit of measure ment This can be selected changed while movi
40. ter Should you key in an incorrect code number you can overwrite that number by simply keying in the correct number This must be done prior to press ing the Enter key Once you hit the Enter key the code that was in D 2 1s stored in memory Step 8 When the inventory route is completed press the CH key Key in an ending ref erence code such as 9999 to mark the end of the survey then press Enter Note that you can store up to 3500 events in the RAC Plus II s memory Fig 4 23 Enter Ending Reference Code Step 9 To exit the memory store function the RAC must be in Count Hold Press the Menu key then press Enter You are now back in normal mode Note To begin another survey go back to Step 1 4 12 Chapter 4 Key Functions amp Operating Procedures Menu 7 Memory Status Note This option is only available with the RAC Plus II It is not available in the RAC Plus I If you are conducting numerous field surveys before downloading the data to a computer you may want to check the status of the RAC Plus II s memory from time to time to make sure you have enough memory left for a new survey Step 1 Press the Menu key then the 7 key to access the Memory Status function Fig 4 24 Memory Status Step 2 Press Enter and the RAC will change to show the amount of memory remain ing and the number of surveys stored D 1 shows the percentage of remain ing internal memory 1 e Str 95 means 95 of me
41. to plain language text You can edit and store different schemes that translate an event code to a text phrase Capable of merging multiple surveys together Insert delete events from existing surveys Export data in a variety of formats Allows real time data collection from the RAC Plus II to your laptop or PDA custom Map data Refer to the WinRAC Plus manual for specific information on how to retrieve and process data from the RAC Plus II RAC Plus User s Manual Appendix RAC Plus Specifications Power 9 to 16 VDC negative ground Display Dual 6 digit window high intensity LED Separate LED indicators for unit or measurement and interval distance Four brightness levels Accuracy 1 foot per mile Resolution 1 foot Keyboard 20 sealed keys 5 million operation with click amp tone feedback ON OFF slide switch Speed Display Three digit 0 999 mph amp kph displayed simultaneous with distance Time Elapsed Real Time hh mm ss Count Bi Directional Up Down Calibration Automatic amp manual with four vehicle calibration and vehicle number ability Non Volatile EEPROM Memory Test System check on power up w display of calibration amp vehicle number Automatic Distance Conversion Miles thousandths to Total Feet to Meters kilometers Count Hold Stops accumulation of distance Display Hold Freezes display without loss of distance Pre distance Capability of starting at known distance o
42. uring capabilities Obvi ously each vehicle so equipped would have to be calibrated and the number recorded The RAC Plus has the unique ability to store in memory four 4 different vehicle numbers and their associated calibration numbers If you are moving the RAC from vehicle to vehicle you will need to enter the correct vehicle unit number prior to measuring with that vehicle The following procedure assumes the calibration number for a particular vehicle has already been determined and 1s stored in memory Step 1 Slide the ON OFF switch to ON The RAC Plus will complete a brief Self Test during which a tone will sound and the active calibration number will be displayed in D 1 while the vehicle number is displayed in D 2 After the Fig 3 7 self test 0 is shown in D 1 0 000 ifthe Calibration Display on Start up mile or meter unit of measurements 1s selected while CH is shown in D 2 Step 2 Press the Menu key the 2 key and Enter You can then select the vehicle number for the calibration that you wish to change by using the 1 through 4 numeric keys If all you want to do is change the active vehicle number press Enter and go to Step 5 If you want to change the calibration factor proceed to Step 3 Fig 3 8 Vehicle Number Selection RAC Plus User s Manual Step 3 Press the Enter key and the current cali bration number for the vehicle selected will be displayed Press the Clear key CLR to clear the curre
43. witch then recalibrate to reach a calibration number within this range Distante Sensor i Ja LIMA Test Tap Te Bi j AMAR Techni gias AAA ATA ea CENT Tap Splice Note If the speedometer does not Connectors respond to vehicle movement sim ply reverse the RED and BLACK wires to correct polarity Fuse Vehicle Speed Sensor VSS Most vehicles should have a 2 wire output from the VSS Dodge amp Ford trucks may have the VSS located on top of the rear end housing instead of at the transmission It will normally be a 2 wire output small gauge wire Ground Black Connect the red and black wires of the long 20 VSS cable to the wires from the vehicle s speed sensor Crimp on tap splice connectors are supplied for convenience on initial installation However we recommend removing the tap splice connectors and reconnecting using wire to wire solder once you are sure Battery all connections to the VSS are proper Insulate with sealant electrical tape as needed Fig 2 6 MDS Installation Diagram 2 6 Installing the RAC Instrument The compact case design of the RAC Plus allows mounting of it in a num ber of convenient locations Popular locations include on the front of the dashboard above or below the dashboard or on the windshield using the optional windshield mounting bracket Wherever you decide to mount the instrument remember it should be within easy reach and the display should be visi
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