User's Manual

SECTION III OPERATION
SM 7063 07/97 3-12
3.8.3 Measuring Distance Traveled Using the Odometer (Count Up from Zero)
1. To use the Odometer, press the
MENU UP
or
MENU DOWN
key until the
Function Menu Display
reads:
“Odometer: press SET “
2. To measure distance, press the
SET
key. The
Function Menu Display
reads:
“ Odometer: 00000 ft “
The 5-digit count is initially set to zero and, as the train moves, it begins counting the distance as
determined by the axle alternator pulses (20 or 60 ppr) and the state of the Reverser Handle.
The Reverser Handle affects the Odometer count as follows:
The initial position of the Reverser Handle defines the “positive” direction for the Odometer (i.e.,
movement in this direction will increment the displayed distance). If the Odometer count has started
and the Reverser Handle is placed into the IDLE position permitting the train to "coast", this distance
is included in the measurement. The distance traveled will continue to be accumulated until there
have been NO pulses for 2 seconds (i.e., the train has stopped). If the Reverser Handle is then
placed in the REVERSE position (i.e., the train is backing up), movement in this direction will
decrement the displayed distance. At any point, the distance indicated on the display is the "net"
distance traveled, allowing for backing up. Since there are only 5 digits in the display, it will roll over
to 00000 after passing 99999.
NOTE
The CDU will NOT begin counting until it has sensed either the FORWARD or
REVERSE direction signal at least once.
3. A second press of the
SET
key will “freeze” the display, indicating the net distance traveled. For
example:
“ Odometer: 02750 ft “
but the counter will keep counting. Subsequent presses of the
SET
key will “unfreeze/freeze” the
display until the function is terminated.
4. Press the
CANCEL
key to reset the Odometer function and restart from Step 1 above, or to
terminate it and advance to another menu item.
5. If the
MENU UP
or
MENU DOWN
key is used to change from the Odometer function to another
menu item function before the measurement is complete, the measurement will continue and the
correct distance will be displayed when the operator returns to the Odometer menu.
6. The units displayed (feet or meters) will be per the configuration selected via the Diagnostic PC.
NOTE
Before the odometer measurement can be considered valid, the CDU must be
calibrated using the Measured Mile method or by direct entry of the wheel
size through the use of the Diagnostic PC.