Uncasville, CT
INSTRUMENTS
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Owner’s Manual
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Electronic
Programmable
Speedometer
IS0157
ISO157A ECR#3131 12/02
Index
Description
Odometer Page 1
Trip Odometer Page 1
Hour-meter Page 1
Over Speed Condition Page 2
Maximum Saved Speed Page 2
Setting the Speedometer Page 3
Boot menu Page 3
Service Hours Page 3
Service Distance Page 4
Clear Hours Page 4
Clear Distance Page 4
Program High Axle Page 4
Program Low Axle Page 5
Input Level control for the speed pulse input Page 5
Run Menu
Clear Odometer Page 6
Set Speed (Over Speed indicator) Page 6
Calibrate Hi Axle Page 6
Calibrate Low Axle Page 7
Harness P1 6 pin connector Page 8
Harness P2 4 pin connector Page 9
COMMERCIAL SPEEDOMETER
Functions available:
1. Odometer display
2. Trip odometer display (resetable)
3. Hour-meter (either rpm or key-on)
4. Service interval for miles or kilometers
(reset, clear and disable features)
5. Service interval for hours (reset, clear
and disable features)
6. Over-speed indicator (microprocessor
output level change at over-speed,
resetable)
7. Two speed axle, selected by input to
microprocessor.
8. Pulses per mile or kilometer input or
change.
A. PPM can be done automatically by
the microprocessor.
B. PPM numbers can be entered using
the push-button.
C. All features available for both high
and low speed axles.
9. Display the highest speed recorded by
the microprocessor (resetable). The
hour-meter and the odometer reading
at the maximum speed time are also
recorded. This information is not
available for display or resetting.
The speedometer must be returned to
the factory for reading.
Detail description
Odometer
The commercial speedometer contains an
odometer to maintain a record of the total
mileage and trip mileage. During normal
operations and after a power on the
odometer display shows;
Trip Odometer
The Trip odometer allows you to keep a
record of the trip miles or kilometers
independent of the Odometer.
The Trip Odometer is fully user resetable.
While in the Trip Odometer display press
the push-button for 4 seconds and the Trip
odometer is reset to zero.
The speedometer is capable of switching
between two different speed axles, selected
by inputting a high or low level on an input
pin.
The pointer travels over a 270-degree dial to
indicate mph (or kph) indicates the speed.
The kph is handled the same as a mph in
the microprocessor. The pulses per mile
will be pulses per kilometer and the self-cal
will be for 1 kilometer instead of 1 mile.
There is no provision to change from miles
to kilometers.
Hour-meter
The speedometer also contains an hourmeter that is always activated by an external
input so that actual engine hours can be
recorded. Quick press the push-button while
in the Trip Odometer function displays the
Hour-meter.
This display cannot be reset. A quick press
of the push-button changes th e display to
the Trip odometer.
Page 1
The last digit on the right blinks up and
p
n
d
down indicating the hour-meter function.
The hour-meter cannot be reset.
Grounding P1-E thru an oil low pressure
switch can stop the hour-meter. If P1-E is
not grounded then the hour-meter will run
continuously with the key on. To provide a
true engine running hour-meter an
external low oil pressure switch is
normally used. The low oil pressure switch
is closed connecting the pin to ground.
The hour meter is not running. When the
engine is running the normal high oil
pressure opens the low oil pressure switch
allowing the hour-meter to operate.
pressing the push-button for 4 seconds.
Another feature of the speedometer is to
keep track of and indicate when a service
interval has passed. The interval can be
either or both mileage and hours.
A seven digit display readout displays the
total mileage, the trip mileage, hour-meter
or maximum saved speed (cleared by
pressing and holding the push-button for 4
seconds while in the maximum speed
display), the menu items are scrolled by
pressing and releasing the push-button on
the speedometer.
Over S
eed conditio
An over-speed condition will ground P1-C
(maximum 40 milliamp load) on the
speedometer when a pre-set speed has
been passed. This output can be utilized
by the customer to activate a warning
device.
Maximum Saved Spee
This speedometer will also record the
maximum speed under normal conditions.
The maximum speed is displayed and
changes as t he sp eed is increased over the
current maximum.
The maximum speed can be reset by
Page 2
If a service interval has been passed the
display will show a service message (one
time only).
Service Hours
Service Distance
Pressing the push-button will return the
display to the primary mileage and hour
displays.
The service interval message will also show
once every time the speedometer is
powered up. The display can be cleared by
the push-button. The pulses per mile output
from the sensor to the speedometer can be
programmed by hand or done
automatically, for both of the high and low
range axles.
Setting the speedometer
There are two major speedometer setting
routines.
The first is activated during boot-up. If the
push-button is pressed and held on when
power is first turned on the “boot menu”
will be activated.
The second menu, the “run menu”, can be
activated during normal running time by
pressing and holding the push-button for
two seconds.
Boot menu
Pressing and holding the push-button
while power is turned on will activate the
“boot menu”.
If you are in a menu, just do nothing for 32
seconds and the microprocessor will restart
and change nothing.
1. T h e first menu item “SEr HrS” (Service
Hours) is used to set the next service
interval in hours.
When this menu feature is started, the
display will show the actual hours when the
present hour service interval will occur.
The main purpose of this menu feature is to
set the next hour service interval time,
however it can also be used to check when
the present service interval will occur.
Starting at the leftmost digit, the digits will
flash on and off for four seconds.
The display will show “HELLO” and wait
for you to release the push-button.
When the push-button is released the first
item on the menu will be shown. In four
seconds the microprocessor will activate
that menu feature. If you want a different
item from the menu, you must press and
release the push-button before four
seconds have elapsed. The menu items
will scroll continuously. If you want to get
out at this point with no changes, stop a t
the last menu item “donE”, and in four
seconds the microprocessor will return to
normal with nothing being changed.
During this time you may change the digit
by pressing and releasing the push-button.
Once you have changed the digit once you
may push and hold the push-button to have
that digit count continuously from 0 to 9.
When you have made your digit choice,
don’t touch the push-button for four seconds
and the next digit to the right will now flash
and be accessible for change.
Page 3
This will continue for all the digits and
will go back to the first digit and repeat. If
the push-button is not pressed for 32
seconds the microprocessor will return to
normal and will change nothing. This is
useful if you’re only here to check when
the present service interval will occur. The
operator may also turn power off at this
point and nothing will change in the
microprocessor controller.
To save the ch a nges yo u h ave made in the
display, you must press and hold the pushbutton while any digit is flashing.
The digit will stop flashing and four
seconds later the microprocessor will reset
any previous events pertaining to the hour
service interval, and install the new
numbers. When the microprocessor is
finished the display will change to “donE”.
same as number 1 above except the mileage
service interval is changed or observed.
3. The third menu item “Clr HrS” (Clear
Hour Service) allows you to clear the hour
service flag and automatically reset the next
hour service.
The calculation will use the previous
interval value. When the operator stops at
the “Clr HrS” display and waits four
seconds the service interval will be
changed.
4. The fourth menu item “Clr diS” (Clear
distance) allows you to reset the mileage
service interval.
The trip switch must now be released to
return to normal operation. If the present
hour-meter is close to 999,999, your new
number may be past the overflow so wh e n
you examine when the hour service event
will occur, the number shown will be less
then the current hour-meter. This is
because the current hour-meter must
overflow and start at zero before the
service event can occur.
2. The second menu item “Ser
diS”(Service distance) will allow you to
program the mileage service interval.
The description and operation are the
Page 4
The implementation is the same as number
3 above.
5. The fifth menu item “PPgn Hi” (Program
High axle) will allow the operator to enter
the pulses per mile or kilometer for the
high axle.
This number will depend on how your
particular sender is arranged. The
maximum pulses per mile or kilometer are
limited to 150,000. When you stop at the
“PPn HI” display and wait four seconds the
microprocessor will display six digits with
the leftmost digit flashing.
The number displayed will be the present
pulses per mile or kilometer rounded off
to the nearest 10 0 th. The rightmost digit
will be a “P” to remind the operator that
they are in the “Programming” mode. The
digit changes and in puts ar e the same as
number 1 (Service Hours) above. Also
present is the same option to do nothing
for 32 seconds and the microprocessor
will reset itself and will change nothing.
will be flashing and every 4 seconds the
next letter will flash.
If the button is pressed when any selection
is flashing, that input signal level will be set
to that level.
Holding the push-button on for four
seconds while a digit is flashing will make
the microprocessor compute the
observation window and will store this
window and the pulses per mile or
kilometer rounded off to the nearest 100
pulses in the EEPROM. The display will
now show “donE” and the operator should
release the push-button to resume normal
operations.
6. The sixth menu feature “PPgn LO”
(Program Low axle) is used to program
the low speed axle pulses per mile or
kilometer.
The implementation and activation are the
same as number 5 (Program High axle)
above.
The choices are low, normal and High. Low
is normally used for magnetic pickups and
normal and high for other types.
8. The last menu item “donE” is used to exit
from this menu.
Leaving the display in “donE” for four
seconds will cause the microprocessor to go
back to normal operations and change
nothing.
Run menu
Pressing and holding the push-button for
two seconds during normal operation will
activate the “run menu”.
The display will show “HELLO” and wait
for you to release the push-button.
7. The next item in the menu is the input
level control for the speed pulse input. The
display will show “ InPuT “.
If nothing is done for 4 seconds then the
display will change to “L n H” and the L
When the push-button is released the first
item on the menu will be shown. In four
seconds the microprocessor will go to the
first menu feature.
Page 5
If you want a different item from the
menu, you must press and release the
push-button before four seconds have
passed. The menu items will loop
continuously. If you want to get out at this
point with no changes, stop at the last
menu item “donE”,
and in four seconds the microprocessor
will return to normal with nothing being
changed or if you are in a menu, just do
nothing for 32 seconds and the
microprocessor will restart and change
nothing.
1. T h e first item in the run menu is “Clr
OdO” (Clear trip odometer).
If the operator stops at this display, the
microprocessor will reset the trip
odometer to zero and will return the
microprocessor to its normal operation.
2. The second menu item “SET SPd” (Set
Speed) is used to set the speed at which
the over-speed indicator will activate.
point.
The option to get out with no changes is
available by not making any changes for 32
seconds.
3. The third menu feature “SELF H I” (Self
calibrate high axle) can be activated by
waiting at this display for four seconds.
This is a feature to allow automatic setting
of the high axle pulses per mile or
kilometer that the speedometer will use to
position the pointer and record the correct
mileage. This is accomplished by indicating
to the speedometer microprocessor, the
beginning and end of a measured mile or
kilometer. The microprocessor will actually
count the pulses that occurred during that
mile or kilometer and compute the required
parameters. When this mode is activated the
speedometer will display “PEndInG “.
Stopping at this display and waiting four
seconds will set the display to three digits
corresponding to the last speed that the
over-speed was set to.
The leftmost digit will be flashing and the
change and implementation of the input
numbers are the same as above. When the
push-button is held for four seconds the
microprocessor will set the number in the
display to be the new over-speed trip
Page 6
This means that the microprocessor is
waiting for the push-button to be pressed
indicating the beginning of the measured
mile or kilometer.
When the push-button is pressed and
released the display will change to “SELF
HI” indicating that the microprocessor is
now counting pulses.
The speed at this point is not important.
The operator may even stop and wait, as
long as power is not turned off and the
measured mile or kilometer is followed as
straight as possible, the operator may not
turn around and go in the opposite
direction. Also for the maximum accuracy,
the operator should not enter any off road
parking as this would deviate from a
straight mile or kilometer measurement.
At the end of the measured mile or
kilometer the operator must press and
release the push-button one more time,
the display will show “CALCInG”
(Calculating)
4 seconds and the push-button is not
pressed, the microprocessor will return to
normal operation with nothing changed.
while the microprocessor calculates the
numbers it needs and will restart. The
new pulses per mile or kilometer will now
be in effect. This feature may be
abandoned at anytime by pressing and
holding the push-button for two seconds.
The microprocessor will reset itself and
continue normal operations. This menu
item may also be stopped by turning off
power to the speedometer.
4. The forth menu item “SELF L ” (Self
calibrate low axle) is used to automatically
calculate the pulses per mile or kilometer
for the low ratio axle.
The implementation and setting are the
same as number 3 “SELF HI” above.
5. The last feature “donE” is used to exit
from this menu. If this display is left on for
Page 7
Shrink Tubing
or Wrap
Harness P1
6 - pin connector
Pin A Battery Input
Pin B Ground
Pin C Over speed signal
Pin D External Push-Button grnd
Pin E Hourmeter control
Pin F Speed Axle
Page 8
2 speed axle (ground selects low axle,
open connection selects high axle)
Hourmeter control (ground disables hour-meter)
External push button (ground active)
Over speed output (ground when over set
speed, 20 milliamps max current)
Ground
Battery input
Shrink Tubing
or Wrap
Harness P2
4 - pin connector
Pin A +8.4 vDC
Pin B Faria
Pin C Faria
Pin D Ground
®
Bus AY
®
Bus BZ
Dash lights (controls
gauge back lights)
Ground
Speed pulses in from sensor
Power for external sensor
Page 9
Notes:
Copyright 2002 by the Thomas G. Faria Corporation, Uncasville CT
No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without
the prior written permission of the company.
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