TIMEWISE 798A User manual

TIMEWISE

798A

RALLY

COMPUTER

USER’S MANUAL

TIMEWISE

798A

SPLIT

LAST CAST

RESET TIME

ODO

∆

AUXILIARY

CLOCK

CALCULATED TIME

Log

SHIFT

FORWARD

PARK

REVERSE

CAST

TRUNCATE

Reset

Intelli-CAST•ODOMETER

SPEED NEXT SPEED

AUXILIARY

ERROR

Clock

Odo Check

Alarm

Odometer

Factor

Preset*

Odo & Time

Next Speed

Last Split

Adjust

ORM

Transit

Calc Time

*Shift –CAST to load

.10 +

–

Remote Brightness

BrightnessRemote Aux

Odo Input

10.00

–Error Format

.01 +

–

Time Format

Intelli-CAST

1.00 +

–

Input ÷Ratio

.001

Speed Format

Odo Format

–

Set / Sync

To Go

A↔

Calc Speed

Speed

Compute Factor

FIRMWARE VERSION HISTORY

TIMEWISE 798A i

798A Operating Firmware History

Version 1.000beta October 18, 1999

Initial release for approval by outside testers.

Version 1.000 November 23, 1999

Finalized speedometer, auto-factor, and datalog firmware. Also added transducer Intelli-Sense™ capabilities. First product

delivered.

Version 1.001 December 14, 1999

The SPLIT and PARK/REVERSE alarm beep lengths are now adjustable.

Version 1.002 December 20, 1999

Added new driver’s remote auxiliary selection: The TIME– –ODO switch can be used to select among the auxiliary

calculated time, main odometer, or auxiliary odometer for the remote display.

Version 1.003 December 22, 1999

Corrected a speedometer calculation problem when the transducer pulse rate exceeded 107 pulses/sec (>150 mph in a typical

magnet sensing application). The 798A speedometer now correctly displays speeds at transducer input pulse rates up to 250

pulses/sec.

Version 1.004 January 7, 2000

The Load function is no longer automatically disabled following a power-off condition. Similarly, once the Intelli-Sense™

system is armed (by changing odometer inputs), the system remains armed following a power-off condition. Previously, the

Load function and the Intelli-Sense™ system had to be re-enabled following any power outage.

Also eliminated potential false transducer failure indications from occurring while making adjustments to the odometer

factors.

Version 1.005 February 7, 2000

Changed the automatic LED display brightness level setting that occurs upon wake-up from idle mode. The main unit LEDs

now re-illuminate at their mid-point if they were set to less than half the maximum brightness when the 798A entered the

idle mode. The driver’s module always re-illuminates at its prior setting.

Version 1.006 February 11, 2000

The power failure and odometer alarm visual notifications (showing in the CLOCK display) can now be dismissed by

turning the rotary switch or actuating any toggle switch. Previously, only an actuation of the SHIFT switch dismissed the

warnings.

Version 2.000 June 1, 2000

Added ability to execute the Calc Factor function without inserting the calculated value into the active factor. Thus, you

can have the 798A compute a sample factor.

On units outfitted with the datalog (Option 1), the user may select whether the speed stored is the “changed to” or “changed

from” CAST value. The choice is made while turning on the instrument. Also added eight additional datalog memories (for

a new total of 56) and fixed a bug that prevented viewing some data when the log sequence number re-started (after reaching

250).

Now offer Option 6 allowing users to set CASTs with .01 mph resolution

Version 2.001 June 27, 2000

Fixed a firmware bug that occasionally prevented a speedometer reading of 0.0 [mph or kph] from being shown (in the

driver’s AUXILIARY display) after the vehicle stopped.

Version 2.002 July 18, 2000

Fixed a bug that prevented setting the “hundredths” digit of the Preset calculated time. Corrected truncation of the

calculated time “tenths of units” digit when executing a preset Load after changing the time counting mode.

Added a new datalog review feature: each logging action automatically advance to the next newer data set. Previously the

data set being viewed remained unchanged following each logging action, such as does a multi-split checkpoint clock

(where a “first to last” review of logged data is required). The 798A can now also function like a traditional datalogger

where a “last to first” review of logged data is expected.

FIRMWARE VERSION HISTORY

ii TIMEWISE 798A

Modified the display of logged calculated time and clock data to always show “tenths of units”, regardless of the selected

time resolution mode for live or split data.

Increased the settable Alarm resolution to 0.01 mile. Previously, the resolution was 0.1 mile.

Added ability to continuously display an alarm “countdown distance” in the main AUXILIARY display without holding

down the SHIFT switch. Also added ability to display the countdown distance in the driver’s AUXILIARY display.

Changed the alarm To Go function to an alarm “warning” distance. The To Go distance can range from 0.00 to 9.99 miles.

Adjusting the To Go distance to a value other than 0.00 causes the beeper to sound at the selected distance prior to arriving

at the alarm mileage. Previously, the alarm beeper could only sound at the alarm mileage. (Also previously, the To Go

function simply served to temporarily display the alarm countdown distance in the AUXILIARY display.)

Altered the driver’s module LED display circuitry re-initialization procedure to also include a re-initialization of the main

LED display circuitry. The re-initialization procedure is now executed after a two-second Last Split activation rather than

simply a two second SHIFT switch activation.

Version 2.003 August 18, 2000

Eliminated illumination of the “thousandths of miles” digit of an Odo & Time adjustment amount (in the AUXILIARY

display) when thousandths of miles are not displayed in the main odometer. The log sequence number now counts to 255

before re-starting. Previously the sequence number counted to 250. You can now enter a Preset CAST with .01 mph

resolution if Option 6 is installed.

Version 2.004 August 21, 2000

Implemented a flashing ODOMETERdisplay when the Remote Park function is activated.

Version 2.005 September 7, 2000

Added an elective ERROR display offset of 0.45 second (or 0.45 hundredth). Some rallyists enable this offset to make it

easier to arrive at a checkpoint “within the count” intended by the rallymaster.

Version 3.000 October 29, 2000

Fixed a bug that prevented the factors associated with the inactive odometer input from being corrected during the

Compute Factor procedure if a sample factor was calculated first.

Added a visual warning that indicates when the odometer pulse rate is too fast (> 1000 pulses/second). Improved the Intelli-

Sense™ transducer failure detection system. Changed the AUXILIARY display system to allow showing “tenths of units”

when viewing a time parameter. Fixed an interrupt conflict introduced in version 2.002 that randomly produced a

speedometer miscalculation.

Version 3.001 December 29, 2000

Fixed a bug in version 3.000 that prevented electronic synchronization to Timewise multi-split chronometers.

Changed the odometer pulse interrupt routine to allow an increase in the permissible odometer pulse rate. Continuous

odometer pulse rates in excess of 5000 pulses/second are now tolerated, even without use of the 798A's built-in input signal

divider. The visual warning indicating an overly rapid odometer pulse rate now occurs at rates in excess of 5000

pulses/second. (Pulse rates up to 640,000 pulses/second are allowed when using the input signal divider.)

Also raised the speedometer timing routine to a higher interrupt priority. This guarantees the accuracy of the speedometer

calculation at extremely high speeds (>180 mph).

Version 3.002 January 3, 2001

Negative Odo & Time adjustment amounts (shown in the AUXILIARY display) are now displayed with a negative sign

preceding the value. Previously, a negative adjustment amount was shown as a number decreasing from 1000.000 (e.g.,

a – 0.100 mile adjustment was shown as “999.900”).

Version 3.003 February 22, 2001

Option 3 (Great Race testing) is now available.

Version 4.000 April 2, 2001

Fixed a bug that caused two problems with the use of the Last CAST odometer adjustment feature:

After exiting a transit zone (i.e., where the CAST had been 0.0 mph), any adjustment to the Last CAST odometer reading

resulted in an incorrectly displayed value of the “updated” last CAST calculated time reading. This was a display anomaly

only. The actual driving time error and the overall calculated time were not compromised.

FIRMWARE VERSION HISTORY

TIMEWISE 798A iii

Secondly, if the Intelli-CAST mode had been active upon a CAST change, the 798A saved the previous CAST (required if

the Last CAST feature is applied) at a value 0.08 mph higher than the actual previous speed. As a result, Last CAST

odometer reading adjustments resulted in a slightly inaccurate correction to the calculated time. Generally, the inaccuracy

was less than 0.01 minute.

Version 4.001 September 20, 2001

Added an elective one second delay preceding execution of a main odometer truncate or main odometer reset.

Version 4.002 October 7, 2001

The elective truncate delay available as of version 4.001 no longer delays a main odometer reset.

Version 4.003 October 28, 2001

Allow use of an alternate LED interface circuit when manufacturing the driver’s module.

Version 4.004 January 25, 2002

Allow use of an alternate LED interface circuit when manufacturing the main computer.

Version 4.005 February 20, 2002

Fixed a bug introduced in version 4.001 that prevented enabling/disabling of option 3 (Great Race testing) on units so

outfitted. Option 5 (adjustable Auxiliary odometer) and option 7 (remote select for driver’s AUXILIARY display) firmware

developed

Version 4.006 March 13, 2002

Changed the firmware so that appropriate digits of the current speed, next speed, and preset speed are correctly “forced to a

zero” after the Speed Format function is used to change the CAST resolution. In all previous firmware versions, the

procedure was incorrectly implemented.

Version 4.007 April 7, 2002

Changed the “t-d-o” selection for the remote AUXILIARY display. The TIME– –ODO switch now selects the auxiliary

odometer, the main odometer, or the alarm countdown distance. Previously, the selections were the auxiliary calculated

time, the main odometer, or the auxiliary odometer.

Added an elective feature that requires the SHIFT switch to be depressed while exiting the FORWARDmode of operation.

When enabled, this “shift to exit forward” feature will cause the 798A to disregard the selection of either PARK or

REVERSE unless the SHIFT switch was depressed when the toggle switch handle was moved away from the FORWARD

position. Should the FORWARD-PARK-REVERSE switch be accidentally moved out of FORWARD, this feature will

keep the 798A odometers counting forward.

Version 4.008 September 4, 2002

While making Last CAST adjustments, actuating the RESET switch will revert Last CAST data to the original measured

values. Previously, the RESET switch was inactive while making Last CAST adjustments.

Version 4.009 January 14, 2006

Option 8 firmware (1 Pulse per second output) developed, improved system reset routines.

Added “in-use” indicator for option 6 (0.01 resolution CASTs).

Added notification of odometer alarm in driver’s display and increased the odometer alarm beep to 2 seconds.

Version 4.010 June 13, 2006

Option 9 (adjustable Error offset bias) firmware developed.

Version 4.011 September 29, 2006

Option 10 firmware (Intelli-Fix) developed. The “ODO ALERT” warning in the driver’s AUXILIARY display is not

displayed whenever a “To Go” distance other than 0.00 is set. The method used to show installed options while viewing

system information has been changed.

Version 4.012 March 20, 2007

Option 11 (Auto-CAST) firmware developed.

Version 5.000 April 25, 2007

General compacting and cleanup of firmware.

FIRMWARE VERSION HISTORY

iv TIMEWISE 798A

Version 5.001 July 24, 2007

Improved Option 10 firmware (Intelli-Fix) by displaying the Intelli-Fix adjustment amount in the AUXILIARY display.

Also, using the RESET switch to revert Last CAST data to original measured values now also removes Intelli-Fix

adjustments from the main odometer.

Version 5.002 September 3, 2009

Option 13 (remote reset of Auxiliary display) firmware developed.

Version 5.003 September 28, 2012

An initial main odometer truncate (or main odometer reset) subsequent to a normal CAST is no longer required for correct

Intelli-CAST computations.

Version 5.004 February 24, 2013

Upon a Preset Load when loading of a CAST is disabled, the values in the SPEED and NEXT SPEED displays are not

exchanged.

Version 5.005 (March 29, 2013) and Version 5.006 (July 24, 2013)

Firmware modified in display update, odometer pulse counting, and other routines to increase execution speed.

Version 5.007 August 11, 2013

Eliminated random driver’s module display anomalies subsequent to an odometer alarm when a “To Go” distance other

than 0.00 was set. The problem had existed since version 4.011 firmware.

Version 5.008 March 26, 2016

Option 16 released. The “tip” contact within the option 7 stereo jack can be used to reset the auxiliary odometer and

simultaneously force it to be displayed in the driver’s module AUXILIARY display.

Changed the “t-d-o” selections for the driver’s module AUXILIARY display. The TIME– –ODO switch now selects the

alarm countdown distance (TIME), the main odometer ( ), or the auxiliary odometer (ODO).

Version 5.009 July 8, 2016

Odometer transducer “Input x Suspect” warnings can be dismissed by turning the rotary switch or activating SHIFT.

When Option 6 is installed (CASTs with .01 mph resolution), the feature can be disabled and re-enabled.

Version 5.010 September 13, 2016

Whenever the SHIFT switch is activated for one second the LED display drivers are re-initialized. Previously, the display

drivers were re-initialized following a two second activation of Last Split.

The live or split ERROR is shown in the AUXILIARY display with selected and the rotary switch turned to Next Speed.

Upon a Preset Load, the main computer is split as long as the CAST switch is activated. Previously the displays did not split.

Automatic CASTs (Option 11) are disabled unless the preset calculated time is hidden (“------” in the Auxiliary display).

Ability to instantly truncate the calculated time to whole minutes (Option 17).

Version 6.000 (October 3, 2016) and Versions 6.001 and 6.002 (January 2017)

A Semi-Intelli-CAST mode is available (Option 18).

Options 1, 3, 5, 6, 9, 10, 11, and 17 are now standard in newly manufactured 798As.

Version 6.003 (July 9, 2019)

Increased display update speed.

Version 6.004 (July 20, 2019)

Increased switch scan speed.

Version 7.000 (July 30, 2019)

Increased switch scan speed when using a trace modified main printed circuit board.

Version 7.001 (November 25, 2019)

Increased error computation speed. Option 7 and alternative LED drivers no longer mutually exclusive.

OPTION 3 SUPPLEMENTAL INFORMATION

TIMEWISE 798A i

NOTICE!

Special Firmware for

Developing a “Lost Time” Reference Table

Your 798A has been configured with specialized “Option 3” firmware. This custom configuration provides

unique features that significantly simplify measurement of “lost time” errors while practicing for

“speedometer only” rallies.

In the “speedometer only” class of rallying, the only measuring equipment allowed in the vehicle during the

rally is an analog reading speedometer and an analog time of day clock. No mileage measuring device

(odometer) is permitted during the rally itself. The driver and navigator must rely exclusively on the

accuracy of the speedometer, the clock, and their knowledge of the responsiveness of the vehicle. Only one

other tool is allowed in the vehicle during the rally: a custom developed “lost time” reference table that lists

time adjustments needed for a variety of course maneuvers. Armed with this reference of itemized timing

errors, the navigator can inventory errors that accumulate during a rally. This allows the navigator to

appropriately tell the driver to speed-up or slow-down.

Using the perfect time computing features of the 798A prior to running a rally, timing errors associated with

typical course maneuvers (non-instantaneous starts and stops, speed changes at signs, slowing for turns, etc.)

can be measured. Although the standard 798A could be used to determine these timing errors, the special

features provided by option 3 firmware greatly simplify the process. A 798A outfitted with option 3

firmware enables development of a lost time reference table within a period of hours or days, rather than

weeks or months.

Option 3

Features Option 3 provides the following specific features:

1) An “Event Timer” is shown in the CLOCK display in place of the time of day clock.

2)A “Calculated Time Counter” is shown in the CALCULATED TIME display in place

of the calculated time.

3)The Error can be shown continuously in the main unit’s AUXILIARY display, where

it may be split.

4)A single switch activation can simultaneously reset the Error, Calculated Time

Counter, Event Timer, and Odometer.

The main unit display of the error will be split when the SPLIT switch is actuated. As a

result, the timing errors accrued during individual maneuvers can be noted. In addition, split

values for the distance driven during the maneuver, the actual elapsed time, and the perfect

driving time can be recorded.

Activating

Option 3

Firmware

Because the features provided by option 3 might be inappropriate when using the 798A

during a rally, the option can be enabled or disabled as needed.

To enable option 3 follow this procedure: turn on the 798A while holding down both the

SHIFT switch and the “minus” position of the “+ / –”1.00 toggle switch. Once enabled,

option 3 will be active whenever you turn on the 798A. When you want to disable option 3,

repeat the “SHIFT”and“ –1.00”toggle switch turn-on procedure.

SUPPLEMENTAL INFORMATION OPTION 3

ii TIMEWISE 798A

You can determine whether or not option 3 is enabled by observing the CALCULATED TIME

and CLOCK displays. If the hour before one o’clock is displayed as “0” hours (rather than

“12”), then option 3 is enabled.

Displaying the

Timing Error in

the AUXILIARY

display

To show the timing error in the main computer AUXILIARY display, select TIME on the

TIME–∆–ODO switch, and either Adj ORM, Next Speed, Calc Time, or Odometer on the

rotary switch.

The timing error shown is the same as that displayed in the ERROR display of the driver’s

module. However, because you can choose different time display formats

(seconds/hundredths, units/tenths, etc.) for the main and remote displays, the two error

values may visually appear different. Nevertheless, the actual error magnitude is the same.

When the 798A is split, the timing error in theAUXILIARY display is split, whereas the error

in the driver’s module is not.

Important! When option 3 is active, the Auxiliary Calculated Time cannot be seen in the

AUXILIARY display of the main computer because the timing error is shown in its place.

Note: When option 3 is

not

enabled, the timing error is still visible in the main unit’s

AUXILIARY display when “∆” is selected on the TIME–∆–ODO switch if (and only if) the

798A is split and Next Speed is selected on the rotary switch.

The Event

Timer and

Calculated Time

Counter

With option 3 enabled, the time of day clock becomes a twelve-hour event timer. This timer

counts from 0:00:00.0 to 11:59:59.9 (or 11:59.99.9 when operating in the “hundredths of

minutes” mode).

Similarly, the calculated time becomes a twelve-hour calculated time counter. The calculated

time counter also counts from zero.

Resetting the

Error, Event

Timer,

Calculated

Time,

and Odometer

When you are viewing the error in the AUXILIARY display, activating the RESET function

will force the error to zero. This is accomplished by resetting both the event timer and

calculated time counter. The odometer is also reset to zero.

As long as you hold the RESET switch up, the error, event timer, calculated time, and

odometer will be kept at zero.

Simultaneously resetting the error, event timer, calculated time, and odometer during

practice runs makes it easy to measure timing errors that accumulate during a course

maneuver. The technique is simple: Prior to the start of the maneuver, actuate and hold the

RESET switch. At the start of the maneuver, release the RESET switch. When the maneuver

is complete, split the 798A. Then record the timing error, elapsed time, computed time, and

distance traveled during the maneuver.

OPTION 6 SUPPLEMENTAL INFORMATION

TIMEWISE 798A i

NOTICE!

Special Firmware for

Setting CASTs with 0.01 MPH Resolution

Option 6 firmware in your Timewise 798A allows you to set average speeds (CASTs) with a

resolution of .01 miles per hour. All other functions in the 798A operate as usual.

Setting Speeds

with 0.01 MPH

Resolution

In a standard 798A, the “+ / – .01” toggle switch is inactive when setting a SPEED or NEXT

SPEED value. The “.01” toggle switch is made inactive because the displays show a

maximum resolution of 0.1 mile per hour.

Although is it rare for a rally speed to be given with higher resolution, there may be

situations (such as emergency speeds that are a percentage of the original CAST) when

setting a speed with 0.01 mile per hour resolution is desired.

With option 6 firmware, the adjustment lock-out of the “+ / – .01” switch is removed, and

you can set the non-visible “hundredths” digit (the “ – – . – x” digit) of the SPEED or NEXT

SPEED parameters. (This extra resolution is not available in the 0 to 399 speed range.)

When you adjust the hundredths digit for the SPEED or the NEXT SPEED to any value other

than “0”, the far right radix point in that speed display will illuminate. In addition, as of

version 5.004 firmware, the hundredths digit will momentarily flash every four seconds in

place of the other digits of the set speed. In case you lose track of the numerical value of the

hundredths digits, just wait for up to four seconds and the hundredths digit will be briefly

shown in the display.

You can also see the hundredths digit of the SPEED display in the driver’s AUXILIARY

display. To do so, display the current CAST in the driver’s AUXILIARY display. On 798A’s

with option 6 installed, the displayed CAST will be shown to 0.01miles per hour resolution.

If you increment (or decrement) the SPEED or the NEXT SPEED’s hundredths digit 10 times,

you will see the tenths digit change appropriately.

A quick method to set a speed’s hundredths digit to zero (“xx.x0”) is to change any other

digit in the speed display. When you do this, the 798A will automatically “set to zero” the

hundredths digit of the speed display being adjusted. That is, whenever a “+ / – 10.00”,

“+ / – 1.00”, or “+ / – 0.1” toggle switch is activated (while adjusting a speed), the 798A

automatically truncates the speed to xx.x0 resolution.

As a result, in order to set a speed with a hundredths digit value other than “0”, you must first

set all the other digits to their required values. Then, lastly, adjust the hundredths digit. Were

you to set the hundredths digit, and subsequently change any other digit in that speed display,

the hundredths digit will automatically be returned to zero (“0”).

When you execute a CAST, the hundredths digits are transferred between the NEXT SPEED

and SPEED displays. Thus, you can set a next speed with high resolution and transfer that

value to the active speed upon a CAST. Likewise, the value in the SPEED display is

transferred to the NEXT SPEED display...including the non-visible hundredths digit.

SUPPLEMENTAL INFORMATION OPTION 6

ii TIMEWISE 798A

As a safety measure, the 798A does not repeatedly increment (or decrement) the hundredths

digit of the speed displays when the .01 switch is held in place for more than a half second.

You must activate the switch multiple times to change the hundredths digit multiple counts.

Setting the

Odo & Time

Calculation

Speed with 0.01

MPH Resolution

The hundredths digit adjustability also applies to the calculation speed used by the

Odo & Time function. That is, while using the Calc Speed function, the .01 toggle switch

will be active. As when setting the current speed and next speed values, the hundredths digit

will momentarily flash every four seconds in place of the other digits of the Odo & Time

calculation speed.

Also, as before, activating a “+ / – 10.00”, “+ / – 1.00”, or “+ / – 0.1” toggle switch (while

adjusting the calculation speed) automatically “zeros” the hundredths digit.

Setting the

Preset Data

Speed with 0.01

MPH Resolution

Lastly, the hundredths digit adjustability also applies to the speed you can load for the

Preset function. In this case, however, because the AUXILIARY display has a “hundredths”

digit, you can see the extra digit of resolution at all times as you set the preset speed.

As before, activating a “+ / – 10.00”, “+ / – 1.00”, or “+ / – 0.1” toggle switch (while

adjusting the preset speed) automatically “zeros” the hundredths digit.

NOTE: The hundredths digit is not saved in the datalog. As a result, when viewing logged data, a

speed recalled from the log and shown in the Speed display will not illuminate the far right

decimal point. That is, the log does not indicate that a high resolution speed had been in use.

Disabling and

Re-enabling

Option 6

Because the features provided by option 6 might not be desired at all times when using the

798A, the option can be disabled and re-enabled while turning on the 798A.

To disable option 6 follow this procedure: Turn on the 798A while both the SHIFT and the

“plus” position of the “+ / – 0.01”toggle switch are activated. Option 6 will thereafter be

disabled. When you want to re-enable option 6, repeat the “SHIFT”and “ +0.01”toggle

switch turn-on procedure.

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