Check The Viewing Position
Stand at the farthest normal training position and confirm that the main time, current interval, and status can be read. Avoid placing the display behind hanging equipment, in direct glare, or where athletes must turn away from the work area to see it. Fullscreen mode can improve readability, but verify how to exit it before class.
Test Audio Through The Real Output
Confirm the browser is using the intended speaker, television, or sound system. Mobile browsers often require a user action before audio playback is allowed, so start a short test timer from the same device that will run the session. Test during normal music and ventilation noise.
- Identify the start, warning, transition, and finish sounds.
- Keep critical cues clearly different from one another.
- Set volume high enough to hear without making it disruptive.
- Know where the device and external speaker volume controls are.
Verify Power And Browser State
Connect long-running displays to power and disable avoidable screen sleep behavior. Close unrelated tabs and notifications. Confirm the browser has loaded the current timer configuration and is not showing stale content from an earlier session. If the application needs connectivity for account data, verify the network before participants arrive.
Rehearse Controls
The operating coach should know how to start, pause, resume, stop, restart, and return to configuration. Keyboard controls can be faster than reaching for a pointer, but only if they have been tested in the active browser. Keep the device where accidental taps are unlikely.
Run A Final Thirty-Second Test
- Load the exact session configuration.
- Confirm count direction and total duration.
- Start from the normal control position.
- Listen for one warning and the finish cue.
- Stop or reset, then reload the intended start state.
Complete this check early enough to correct a cable, permission, or configuration issue without delaying the briefing.