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zone. For more information see Polar Sport Zones. This way, if you haven’t had time to define preset
target zones prior to exercise, you can set a target zone on the go during a session.
Press and hold LAP (OK) to Lock /Unlock zone.
If, for example, you are cycling with a heart rate of 130 bpm which is 75% of your maximum heart
rate, and matches sport zone 3, you can press and hold LAP to lock your heart rate into this zone. Sport
zone3 Locked 70-79 is displayed. An alarm sounds if you are below or above the sport zone (if the target
zone alarm function is on). Unlock the sport zone by pressing and holding OK again: Sport zone3
Unlocked is displayed.
Zoom the Display
Press and hold UP to zoom into the upper row, and DOWN to zoom into the middle row. Return to the
normal display by pressing and holding the button again.
Illuminate the Display (Night mode on)
To illuminate your display, press LIGHT during the exercise. Night mode is turned on, and the display
illuminates automatically when any button is pressed or exercise phase is changed.
View Settings Menu
Press and hold LIGHT > Settings
The Settings menu is displayed when pressing and holding LIGHT. In the settings menu you can change
certain settings without pausing the exercise recording. The contents of this menu vary according to
the exercise type. For further information, see 7. Settings.
• Prev. phase: View summary information of the previous phase or repetition (displayed when you have
created an exercise with phases with the Polar ProTrainer 5 software).
• Keylock: Lock/unlock buttons to prevent accidental button presses.
• Autoscr.: Select the Auto scroll On/ Off and displays will scroll during the exercise.
• TZ Alarm: Turn target zone alarm sound on/off.
• Change zone: Switch target zones (displayed when you have defined multiple target zones, except
when an exercise with phases is created with the Polar ProTrainer 5 software).
• HR view: Select how to view your heart rate.
• HeartTouch: Select HeartTouch to view data during exercise without pressing buttons, by bringing
the cycling computer near the Polar logo on the transmitter.
• A.Lap: Switch the automatic lap function on or off.
• Arr. time: Set the arrival time On/Off.
Once modify the settings, the cycling computer will return to exercise mode.
Pause Exercise
Pause exercise recording by pressing STOP.
In pause mode you can:
• Continue: Continue exercise recording.
• Exit: Stop exercise recording.
• Summary: View a summary of functions that were activated during exercise.
• Settings: Change all the same settings as during exercise. Additionally, you can also change display
personalization, which cannot be done during exercise.
• Reset: Delete recorded exercise information. Confirm with OK and press OK again to restart
Polar CS400 User Manual 15