Section 2
OPERATION
TIMEWISE 798A
31
Obviously,
TRUNCATE
should be used at the start of a rally. Less obvious is that you
should also consider using
TRUNCATE
at the beginning of each leg, whether or not the
official rally mileage restarts at 0.00 mile. Here’s why:
Rallymasters generally design a rally course over a period of time. Since each leg may be
measured separately, and often only to a precision of 0.01 mile, there is usually a small
distance (<0.01) that remains unaccounted for at the end of each leg. When the individual leg
measurements are added together to form a cumulative distance for the entire rally, these
small distances are typically not carried over from one leg to the next. To exactly match the
rallymaster’s measurements you must similarly discard this small distance. Activating
TRUNCATE
at the start of every leg accomplishes this. If you do not truncate the main
odometer, there will possibly be an error (albeit slight) in the odometer throughout each leg.
Even when the rallymaster had measured the entire route in a continuous run, you probably
should still activate
T RU N CA T E
at each outmarker. This is because
T RU N CA T E
also
truncates the calculated time. See
Truncating
the
Calculated
Time
for more information.
IMPORTANT! As long as you have the
TRUNCATE
function selected, the 798A will not
accumulate any distance in the main odometer, nor will the calculated time change. As an
option, Timewise can reprogram your 798A so that subsequent to a truncate being executed,
the main odometer will immediately count distance (and count calculated time) even while
the
T R U N C A T E
switch continues to be depressed.
*
Activating
TRUNCATE
does not affect the auxiliary odometer.
Resetting the
Main
Odometer
The main odometer can be reset to exactly 0.00000000 by actuating the
SH I F T
switch and
then concurrently depressing the
TRUNCATE
switch. This executes the main odometer
Reset
function.
†
You must actuate the switches in the prescribed order. After the reset, the main odometer
will be held at 0.00000000 as long as you depress the
TRUNCATE
switch.
‡
IMPORTANT! Resetting the main odometer also truncates the calculated time. See the
discussion in
Truncating the Calculated Time
for further information.
Resetting the main odometer does not affect the auxiliary odometer.
Resetting the
Auxiliary
Odometer
The auxiliary odometer has non-visible internal digits just like the main odometer. When you
select the
RE S E T
position of the
RE S E T –SH I F T
toggle switch, while the auxiliary odometer
is being displayed, the auxiliary odometer will be reset to 0.00000000 mile. In this way, you
can measure precise distances between physical references.
Resetting the auxiliary odometer does not affect the main odometer or the calculated time.
*
If the delayed truncate mode is enabled, the main odometer (and calculated time) will advance during the 1 second delay prior to the
truncate function actually being executed. Also, the odometer (and calculated time) will count immediately after the truncate is
executed, even if the
T R U N C A T E
switch continues to be depressed.
†
There is never a delay when resetting the odometer, whether or not the delayed truncate mode is enabled.
‡
When the delayed truncate mode is enabled, the main odometer will accumulate distance immediately following the reset, even if you
continue to depress the
TRUNCATE
switch. The calculated time will also advance immediately following the reset.
