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Odometer Settings:

Clear Odometer:

Sets the first odometer (overall distance) to zero.  See the “Odometer Mode” section for zeroing the 
second (incremental) odometer.

Preset Odometer:

This selection allows you to preset the first odometer to any value.  Once selected, the display shows 
the present odometer value, and two switch options.  Moving the 

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 switch downward selects which 

digit will be altered, and pressing the 

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 switch upward increments the digit.  By manipulating the 

scan switch, all 6 digits of the odometer may be changed, one at a time.

When the desired value is entered, press the HOLD switch to resume normal operation.

Odometer Factor:

The odometer correction factor is entered in the same manner described for presetting the odometer. 
The correction factor is used to calibrate your 

ALFA

 odometer so that it measures the same distance 

as the rally-master for easier course following.

To determine your odometer correction factor use this formula:

        Current Factor

     New Factor =                                   X  Course Miles

Measured Miles 

For example:  Start the odometer leg with the factor set to 5000.  The end of the odometer check leg
is   officially   at   12.56   miles,   but   your  

ALFA

  measured   only   11.21   miles.     5000   divided   by   11.21,

multiplied by 12.56 equals 5602.  5602 is your new factor and should be entered into your 

ALFA

Zero-on-Hold:

This feature of the 

ALFA

 causes the second odometer (incremental distance) to be automatically 

zeroed whenever the HOLD button is pressed.  The previous distance is displayed while the new 
distance is accumulated in the background.  When the HOLD is released, the new distance is 
immediately displayed.

ALFA-Club Owners Manual

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Summary of Contents for ALFA-Checkpoint

Page 1: ...LFA Club Owners Manual Rev 4 0 August 2018 Small Systems Specialists 201 N Lobb Ave Pen Argyl PA 18072 609 301 0541 ALFA Rally cc On the web at www rally cc Memory Checkpoint Clock Dual Odometer Clock...

Page 2: ...y 5 Setup Options 5 Clock Odo mode select 6 Set Clock 6 Bump Clock 8 Zero Odometer 7 Preset Odometer 7 Odometer Factor 7 Zero on Hold 7 Sending Unit Test Mode 8 Backlight On Off 8 Time Synchronization...

Page 3: ...o occasionally give the snaps a gentle squeeze It is important to use only 9 volt Alkaline batteries in your ALFA clock Energizer and Duracell are examples of appropriate batteries In normal operation...

Page 4: ...mory and displays this on the bottom line of the display The remote HOLD input may be triggered by an automatic timing line with the same effect Up to 99 splits may be stored in the ALFA s memory Note...

Page 5: ...odometer off and downward again runs the odometer in reverse Note that the shape of the decimal point in the odometer display indicates the direction of the odometer The lower right corner of the dis...

Page 6: ...he time of day Timing modes may be changed without affecting the time of day so it is possible to switch between seconds and hundredths of a minute or change the precision on the fly Note If you inten...

Page 7: ...The correction factor is used to calibrate your ALFA odometer so that it measures the same distance as the rally master for easier course following To determine your odometer correction factor use thi...

Page 8: ...TIC Note that you should only use the CONSTANT setting either bright or dim when running with the 12 volt adapter Battery life will be extremely limited if the backlight is on constantly Time Synchron...

Page 9: ...r ALFA clock as a power backup in case the 12 volt cord falls out of the lighter plug 2 It is best to wire the ALFA directly to the battery or fuse box and not use a lighter cord Use a lighter cord on...

Page 10: ...12 volt DC power Input The ALFA requires a minimum of 6 volts DC to operate Power consumption is approximately 15ma without the backlight 50ma with the backlight full bright 2 Serial communications Ou...

Page 11: ...kage of the glass enclosure Although every effort has been made to assure reliable accurate operation Small Systems Specialists will not be responsible for any loss of money property time or trophies...

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