Gasboy Fuel Point Vehicle Module - Manual (Page 26)

Preparation for Programming Hours Ratio (Enter ODO Ratio)
Page 4-12 MDE-4524A Vehicle Module Programming Manual· May 2006
Figure 4-5 Sample Rear Differential Showing Axle Ratio Marking
SN 622451A RATIO 4.78
16645837C95 502CA200--4Z
Example:
Signal gear teeth = 16
Tire size = 10.00 R 20 = 502 revs/mile
Axle ratio = 3.41:1
Ratio = 16 x 502 x 3.41
= 27,389 (drop the decimal places)
• Use programmer's calibration feature. If you cannot figure the odometer ratio using any
method listed above, just enter any number and let the VM Programmer's calibration
feature narrow down the correct ratio. This method may require several calibrations to get
a good ratio, and the vehicle may have to travel several hundred miles between the
calibrations. Start with a number between 10,000 and 100,000.
Hours Ratio (Enter ODO Ratio)
The VM counts time in increments of approximately 128ms, therefore the hours ratio is fixed
at 28,000 pulses-per-hour. Regardless of what is entered for this ratio, the VM automatically
changes it to 28,000. You should just press the ENTER key for the ratio prompt of an hours
counter.
Dual Counters (DUAL COUNTERS, NO - 0, YES - 1)
This field determines if the Programmer prompts for a second counter (odometer or hours)
field. Enter 0 for a single VM or 1 for a dual VM.