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SOA Clock Guide

SOA Start Clocks

Quick Guide

  1. Place the Start Clock at the start.
  2. Place the Pre Start Clock at pre Start.
  3. Connect the two displays with the data cable. Note that the plug only goes one way – don't force it. The plug has a locking screw cover for security - screw this up.
  4. Turn on the Start Clock. Turn on the Pre Start clock. ON is the down position.
  5. Turn off the displays and return the clocks so they can be re charged.
  6. Each display has a charger, the charger connects to the socket, the switch must be in the UP position for the charger to operate.The light is OFF when charging and comes on when the charge is complete.

Longer Guide

Each Clock has a Master and Slave Display. The Master Clock has an accurate ‘Real Time Clock’ and will display real time. The slave is controlled by the Master Clock and will display the Call Up or Pre Start Time. By default the Pre Start is set to -3. The displays are Red LEDs showing Hours Minutes and Seconds e.g. 12.35.22

The Master clock will give a warning ‘beep’ and a count down ‘beep’ to each minute when a start BEEP will sound.

The clocks are probably best placed off the ground on a small table or stand. Place the Master Clock near to the start line where it can be seen by starters and Start officials.

Place the Slave Clock by the Pre start where it can be seen by waiting competitors and Pre Start officials. Connect the master to the slave with the signal cable – the sockets can only fit one way into the plugs. Turn on the Master and Slave displays by pressing the switch down.

Following a self test display the start and pre start times will show. TMR shows at bottom right of the screen. The Real Time Clock will be updated by the GPS unit shortly after being turned on. The display freezes during the update. Once a GPS time is available the clock is synchronised to the GPS time pulse. GPS shows at bottom right of the screen.

The displays have rechargeable Sealed Lead Acid batteries which should last for 7 hours use. The batteries will need to be recharged before the next use. The charger fits to the signal plug. To charge the batteries place the switch in the upper position.

The Pre Start delay can be adjusted to Zero. The buzzer can be turned off. In this state both displays will show race time and the displays can be set up at the finish so finishers can see their finish time.

The clock can be adjusted for Summer Time (DST).


Adjusting the Clocks

The Master Clock has a LCD Display and key pad.

On the key pad only UP (2), DOWN (0), STAR(*) and HASH(#) keys are used.
UP and DOWN will scroll through the menu options.
OK will select a Menu Option

UP and DOWN can then be used to adjust values e.g. adjust Pre Start delay
HASH is the OK button.

Start Call Up
Down Key

Buzzer is ON/OFF
Use STAR to turn Buzzer ON or OFF

Down Key to move to Set Pre Start

Set Pre Start
Press OK
Delay – 00 Mins
Press OK to enable Change mode

Down Key to move to Set DST

Set Pre Start
Press U/D

Delay – 00 Mins
OK = Done
Use UP(2) or DOWN(0) key to change delay
Use OK(#) to Finish and return to Set Pre Start

DST is ON/OFF
Use * to turn Buzzer ON or OFF
Down Key to Time Adjust

Time Adjust OK
OK(#) to enter Time adjust mode

Hours U/D OK=Mins
Use UP(2) or Down(0) to change Hours.

Use OK(#) to move to Minutes.
Use * to Finish

Mins U/D OK=Secs
Use UP(2) or Down(0) to change Minutes.
Use OK to move to Seconds.

Use * to Finish

Secs OK=00
* = Done
Use OK(#) to Zero Seconds when synchronising to another clock.

Use * to Finish

Use * to Finish setting time
Use Down(0) to move to Start Call Up display

(To re synchronise with GPS time press OK(#))
(Sync GPS Press *)

(Press # when done)

For help or support use the contact form at Clock Project - Feedback Form

Download a copy of the guide here:

SOA-Clocks-Guide.pdf ThumbNail
User Guide for SOA Start Clocks