PROGRAMMABLE VEHICLE SPEEDOMETERS INSTALLATION OF GAUGE FIGURE 1 After checking fit of gauge and U bracket, insert gauge into panel and install bracket over mounting studs. Install a washer and nut onto each mounting stud as shown in Figure 1. CAUTION: MAKE SURE THAT ELECTRICAL WIRING IS DRESSED AWAY FROM MOVING OR HOT ENGINE COMPONENTS. These instructions for installing, wiring, and programming the Veethree Programable Speedometer with Odometer should be kept with the vehicle. CAUTION READ THESE INSTRUCTIONS THOROUGHLY BEFORE PROCEEDING WITH INSTALLATION. DO NOT DEVIATE FROM WIRING INSTRUCTIONS. INCORRECT WIRING COULD CAUSE ELECTRICAL SHORT AND POSSIBLE FIRE. ALWAYS DISCONNECT POSITIVE LEAD FROM BATTERY BEFORE MAKING ANY ELECTRICAL CONNECTIONS. NOTE:If you must use a 12vdc unit in a 24vdc system, use a Voltage Reducer, Veethree Part Number 6221776 in the "IGN" lead, and change light bulb to Veethree part number 40102-007 or equal (GE400). PREPARATION FOR INSTALLATION 1. Select a mounting location for gauge which provides easy readability from the operating position. Check behind mounting panel for sufficient installation clearance. 2.Depending on Speedometer model, cut either a 3.395" +/- .032" (86 mm) or 4.625 (118mm) diameter hole through the panel at the desired location. 3. Insert gauge into mounting hole and check for fit. 4. Fit U bracket from hardware package over mounting studs on back of gauge (See Figure 1). Legs of bracket may be shortened if required. IMPORTANT: BEFORE PROCEEDING WITH INSTALLATION AND FINAL WIRING, SPEEDOMETER MUST BE PROPERLY PROGRAMMED TO OPERATE WITH YOUR EQUIPMENT. REFER TO THE PROGRAMMING SECTION OF THIS BULLETIN BEFORE PROCEEDING. See Figure 2. Connect wiring to Gauge terminals using washers and nuts supplied. Use wire colors conforming to vehicleís existing color code. 1. Connect a wire from GND (ground) terminal of gauge to electrical system ground. 2. Connect a wire from LT (light) terminal of gauge to panel light switch or LT terminal of another Veethree gauge. 3. Connect a wire from the positive IGN terminal of gauge to positive 12-16 V DC power source. 4A. SPEEDOMETERS USING MAGNETIC PROXIMITY SENSORS Run a wire from the SEND terminal on back of gauge to one terminal on Proximity Sensor. Run a wire from the GND (ground) terminal on back of gauge to remaining terminal on Proximity Sensor. 4B. SPEEDOMETERS USING PULSE GENERATORS Run a wire from the SEND terminal on back of gauge to one terminal on Pulse Generator. Run a wire from the GND (ground) terminal on back of gauge to the other terminal on Pulse Generator. This is the preferred method. Grounding this terminal to a common chassis ground may introduce electrical "noise" into the signal. 4C. SPEEDOMETERS USING GPS TRANSDUCER Run a wire from the send terminal on the back of the gauge to the white wire of the transducer. 5. When wiring is complete, connect power. Start engine and check gauge for proper operation. CAUTION: BEFORE RECONNECTING BATTERY TO ELECTRICAL SYSTEM, RECHECK WIRING TO ENSURE ALL CONNECTIONS ARE PROPERLY MADE. INCORRECT CONNECTIONS OR ELECTRICAL SHORTS COULD CAUSE DAMAGE OR FIRE IN SYSTEM. ELEMENTS OF ELECTRICALSYSTEMS SHOULD HAVE PROPPER FUSES INSTALLED. SO19 Revesion 5 FIGURE 2 WIRING DIAGRAM PROGRAMMING THE SPEEDOMETER The speedometer is accurate on any system having a frequency at full scale between: DIAL RANGE: FULL SCALE FREQUENCY DIAL RANGE: FULL SCALE FREQUENCY 0-30 mph 265-6599 Hz. 0-50 km/h 444-10,999 Hz. 0-85 mph 91-2337 Hz. 0-140 km/h 77-1924 Hz. 0-120 mph 133-3299 Hz. 0-160 km/h 89-2199 Hz. 0-160 mph 178-4399 Hz. Programming the speedometer is accomplished in three steps: STEP 1 . Determine the Full Scale Frequency (F.S.F.). STEP 2. Calculate the Divide Number. STEP 3. Program the DIP switch “Program” section. STEP 1: Determine the full scale frequency (F.S.F) NOTE: The tire revs/mile (or KM) may be obtained from the tire manufacturer; the number of pulses per generator revolution from the pulse generator supplier, the rear axle ratio may be obtained from the chassis manufacturer; and the number of drive and driven gear teeth may be obtained from the transmission or chassis manufacturer. A. If using wheel mounted magnetic proximity sensor: Tire Revs/Mile (or KM) x # of Teeth (or Slots) on wheel x Constant see below) . = F.S.F DIAL RANGE: CONSTANT(f): DIAL RANGE: CONSTANT(f): 0-30 MPH 0.0083 0-50 KM/H 0.0138 0.0236 0-140 KM/H 0.0388 0-85 MPH 0.0333 0-160 KM/H 0.0444 0-120 MPH 0.0444 0-160 MPH EXAMPLE: 0-85 MPH Model: Tire Revs/Mile (or KM) x # of Teeth (or Slots) x Constant(f) = F.S.F 988.7 x 90 x 0.0236 = 2100 Hz. B. If using transmission mounted pulse generator: (You must ascertain the number of pulses per revolution produced by the Pulse Generator used. If not one of the “pulses/rev” listed below, contact Veethree Technical Service. The Veethree Pulse Generator No. 9604276 is 8 pulses/revolution. Tire Revs/Mile (or KM) x Rear Axle Ratio x (# of Drive Gear Teeth) x (# of Driven Gear Teeth) = Pulse Gen.Revs/Mile(or KM) Pulse Gen.Revs/Mile(or KM) x Constant (see below) = F.S.F. DIAL RANGE 0-30 MPH 0-85 MPH 0-120 MPH 0-160 MPH 8 pulse/rev 0.0666 0.1888 0.2666 0.3555 CONSTANT with: 16 pulse/rev 30 pulse/rev 0.1333 0.2500 0.3777 0.7083 0.5333 1.000 0.7111 1.3333 DIAL RANGE CONSTANT with: 8 pulse/rev 16 pulse/re 0-50 KM/H 0.1111 0.2222 0-140 KM/H 0.3111 0.6222 0-160 KM/H 0.3555 0.7111 30 pulse/rev 0.4166 1.1666 1.3333 EXAMPLE: 0-85 MPH Model, 8 pulse/rev. generator Tire Revs/Mile (or KM) x Rear Axle Ratio x (# of Drive Gear Teeth)˜ (# of Driven Gear Teeth) = Pulse Gen.Revs/Mile(or KM) 988.7 x 3.01 x 4 x 5 = 2380.79 Pulse Gen.Revs/Mile (or KM) x Constant = F.S.F. x 0.1888 = 447.59 Hz. 2380.79 PAGE 2 C. If using an 8 pulse GPS transducer no calculations are required. Simply set the switches for a DIVIDE number of 8. Set the four filtering switches 9 thru 12 to OFF. STEP 2: Calculate the divide number: F.S.F. x Constant (see below) = DIVIDE NUMBER (the divide number must be rounded UP to next whole number). DIAL RANGE: 0-30 MPH 0-85 MPH 0-120 MPH 0-160 MPH CONSTANT: 66.66 23.61 33.33 44.44 DIAL RANGE: 0-50 KM/H 0-140 KM/H 0-160 KM/H EXAMPLE: 0-85 MPH Model F.S.F x Constant = Divide Number = 18.83 447.59 Hz x 23.61 CONSTANT: 111.11 19.44 22.22 Round up to 19. The DIVIDE number is 19. STEP 3. Program dip switches On the rear of the speedometer there is an oval shaped black plug (See Figure 3). Upon removal of the plug two six- position DIP switches will come into view. Also on the rear of the case is a blue label denoting the function of each switch position. The label is divided into two sections- Programming and Filter. Only the eight programming switches are used at this stage. The Divide number must be programmed into the speedometer in Binary Code Decimal format. That is, the TENS position and the ONES positions must be programmed separately. EXAMPLE: Assume a divide number of 41. 41 = 40 (TENS divide number) 1 (ONES divide number) FIGURE 3 First, program the1. Refer to the chart on Page 4 and move position 1 to ON and switch positions 2, 3, & 4 to OFF. Next, to program the 40, refer to the chart and move switch. position 7 to ON and switch position 5, 6 and 8 to OFF. When the Divide number is 9 or below, set all the TENS switches to OFF. Filter dip switches To minimize any extraneous electrical noise from interfering with the operation of the speedometer Veethree has incorporated filter switches to fine tune the filter band to the applica tion. The filter programming is accomplished as follows: Find switch positions 9 through 12 on the DIP switch on the right. Refer to the chart labeled Filter Programming on Page 4. Find the range of full scale frequencies in the left hand column that covers the full scale frequency of the application. Read accross to the right and set switch positions 9 thru 12 as indicated. NOTE: For applications using a Drive Ratio adapter providing 1000 Revs at 60 MPH, the Full Scale Frequency will be 189 Hz. and the Divide number will be 8. The program DIP switches should be set with the TENS Divide numbers to the off position and the ONES Divide numbers set for 8. The Filter programming switches should be set for the 330-347 Full Scale Frequency positions. Replace the oval shaped black plug. The speedometer is now fully adjusted. The Programmable Speedometer can be used with pulse generator, magnetic proximity sensors without any additional adjustment. Veethree offers both senders for use with speedometers. SPEEDOMETER ACCURACY The speedometer accuracy is determined by the magnitude of the divide number and its nearness to a whole number. When the Divide number is a whole number (i.e. 42.00) the electronics error to the odometer and the vector movement is zero. This would mean the only other inherent error would be the accuracy of placing the pointer on its shaft. The worst situation would be to have a low Divide number resulting in a 0.5 fraction (i.e. 14.5). Since the program switches can only enter whole numbers the 0.5 needs to be rounded up or down. Fractional numbers closer to a whole number result in much better accuracy. Example# 1: 14.5 round to 15 .5/15 = 3.33% error Example# 2: 14.94 round to 15 .06/15 = 0.4% error The higher the divide number the more accurate the speedometer becomes. Example #3: Example #4: 88.5 round to 89 88.13 round to 88 .5/89 = .56% error .13/89 = .147% error When designing an application using a magnetic proximity sensor it is very important to try to keep the Divide number as close to a whole number as possible. This will keep the system error to an absolute minimum. Whole number Divide numbers have no digital error. PAGE 3 EXAMPLE: Assume a DIVIDE number of 41. That is 1 ONES. Program switch positions 1 thru 4 next to the 1 in the ONES DIVIDE NUMBER column. That is also 40 TENS. Program switch positions 5 thru 8 next to the 40 in the TENS DIVIDE NUMBER column. PROGRAM CHART Ones Divide Number 1 2 3 4 5 6 7 8 9 Switch Positions 1 ON OFF ON OFF ON OFF ON OFF ON 2 OFF ON ON OFF OFF ON ON OFF OFF 3 OFF OFF OFF ON ON ON ON OFF OFF 4 OFF OFF OFF OFF OFF OFF OFF ON ON FILTER PROGRAM CHART Tens Divide Number 10 20 30 40 50 60 70 80 90 Switch Positions 5 ON OFF ON OFF ON OFF ON OFF ON 6 OFF ON ON OFF OFF ON ON OFF OFF 7 OFF OFF OFF ON ON ON ON OFF OFF 8 OFF OFF OFF OFF OFF OFF OFF ON ON Full Scale Frequency < 347 347-388 389-546 547-695 696-748 749-808 809-905 906-1072 1073-1286 1287-1497 1498-1771 1772-2145 > 2145 Switch Positions 9 ON ON ON OFF OFF OFF OFF ON ON OFF OFF OFF OFF 10 OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON 11 OFF OFF ON OFF OFF ON ON ON ON OFF OFF ON ON 12 OFF ON ON OFF ON OFF ON OFF ON OFF ON OFF ON Correction formula for programmable speedometers To change or correct an existing speedometer reading to a different reading, the Program Divide Number is changed, using Switches 1 through 8 (See Figure above). Incorrect speed reading (MPH or Km/H) x Program Divide Number Divided by Actual Speed = Correct DIVIDE number. Example: If the speedometer reads 45 MPH at 55 MPH actual speed, and the switches are set for a Program Divide # of 65: 45 x 65 = 53.18, rounded off to 53 55 In this case, the switch configuration changes from Program DIVIDE # of 65 (101001100101) to Program DIVIDE # of 53 (110010101111) where 0 = OFF, 1=ON. Filter switches 9-12 are listed in the chart above. Determine Full Scale Frequency with the new settings by multiplying the new Divide # x Constant 23.61. In the above example, 53 x 23.61 = 1,251.33. If Necessary, reset switches 9-12 to reflect the correct new Full Scale Frequency. PAGE 4