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User Manual

PurpleSentinel edited this page Oct 16, 2026 · 3 revisions

User Manual

A GPS lap timer. This manual walks through every screen and every setting on the device.

New to it? Read Getting Started first — it covers the one gesture you cannot guess, and the one thing that stops the timer working out of the box.

Contents

Page What it covers
Getting Started First power-on, what you see, and your first session
Moving Around The five gestures, and a map of every menu
Modes The eight modes and when to use each
The Session Screens Ready, running, rest and review
Settings Every setting, what it does, and what it accepts
Tracks Choosing a circuit, and why timing may not arm
Diagnostics and Troubleshooting What the device reports, and what to do when something is wrong

The short version

  1. Hold a finger on the screen to open the menu. Nothing else opens it.
  2. Tap to choose. Swipe left and right to move between choices. Swipe down to go back.
  3. Pick your Mode, pick your Track, then start a session.

One thing to know before you rely on it

Timing only arms on a circuit whose geometry has been validated. Every circuit in the supplied UK pack is marked provisional, which means the device will load it, show its name, and run as a plain session timer — but it will not time laps.

This is deliberate rather than unfinished. A start/finish line taken from a map can be out by tens of metres, and a lap time measured against a line in the wrong place is worse than no lap time, because it looks correct. Tracks explains how a circuit becomes timing-ready.

What it will not do

  • Time laps against an unvalidated circuit. See above.
  • Show a compass while parked. The heading comes from your direction of travel, so standing still there is nothing to show. There is no magnetic sensor.
  • Show a clock in British Summer Time. It reads GMT all year.
  • Replace a transponder. It is a GPS timer and it is honest about its own accuracy, but it is not a sanctioned timing system.

Safety

Set the device up before you go out. Do not operate it while driving — the menu is deliberately behind a press-and-hold so a knock cannot open it, but that is a safeguard against accidents, not an invitation to use it on the move.

Track Day mode withholds live lap times on purpose: many track days run under regulations that prohibit timing on circuit. Laps are still recorded and are available in Review afterwards.

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