Module No. 5550

The watch has a light that illuminates the face for viewing in the dark.

To illuminate the face manually

Press (B) to turn on illumination.

Illumination will turn off automatically if an alarm starts to sound.

To illuminate the face when Auto Light is enabled

If Auto Light is enabled, face illumination will turn on automatically whenever the watch is positioned at an angle of 40 degrees or more.

Important!

Auto Light may not operate properly when the watch is at a horizontal angle of 15 degrees or greater from horizontal as shown in the illustration below.

Auto Light may operate unintentionally and run down the battery if the watch is blocked from light by your sleeve.

Electro-static charge or magnetism can interfere with proper auto light operation. If this happens, try lowering your arm and then angle it towards your face again.

When moving the watch you may note a slight rattling sound. This is due to operation of the auto light switch, which determines the current orientation of the watch. It does not indicate malfunction.

Configuring the Auto Light Setting

1. Enter the Timekeeping Mode.

Navigating Between Modes

2. Hold down (B) for at least three seconds to toggle Auto Light between enabled and disabled.

[LT] is displayed while Auto Light is enabled.



Note

Auto Light is disabled while [CHG] is shown on the display.

Specifying the Illumination Duration

You can select either 1.5 seconds or three seconds as the illumination duration.

1. Enter the Timekeeping Mode.

Navigating Between Modes

2. Hold down (A) for at least two seconds. Release the button when [ADJ] appears on the display.

Releasing the button will cause the city code and city name to appear on the display.



3. Press (C) 10 times.

This will cause [LT1] or [LT3] to appear on the display.



4. Press (D) to toggle between the two illumination duration settings.

[LT1]: 1.5-second illumination

[LT3]: 3-second illumination



5. Press (A) to complete the setting operation.