programmable vehicle speedometers - Veethree Instruments

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 FILTER PROGRAM CHART
Ones Tens Full
Divide Switch Positions Divide Switch Positions Scale
Switch Positions
Number Number Frequency
1 2 3 4 5 6 7 8 9 10 11 12
1 ON OFF OFF OFF 10 ON OFF OFF OFF < 347 ON OFF OFF OFF
2 OFF ON OFF OFF 20 OFF ON OFF OFF 347-388 ON OFF OFF ON
3 ON ON OFF OFF 30 ON ON OFF OFF 389-546 ON OFF ON ON
4 OFF OFF ON OFF 40 OFF OFF ON OFF 547-695 OFF OFF OFF OFF
5 ON OFF ON OFF 50 ON OFF ON OFF 696-748 OFF OFF OFF ON
6 OFF ON ON OFF 60 OFF ON ON OFF 749-808 OFF OFF ON OFF
7 ON ON ON OFF 70 ON ON ON OFF 809-905 OFF OFF ON ON
8 OFF OFF OFF ON 80 OFF OFF OFF ON 906-1072 ON ON ON OFF
9 ON OFF OFF ON 90 ON OFF OFF ON 1073-1286 ON ON ON ON
1287-1497 OFF ON OFF OFF
1498-1771 OFF ON OFF ON
1772-2145 OFF ON ON OFF
> 2145 OFF ON ON 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.
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