Module No. 3521

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.

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.

Frequent use of illumination will run down the battery.

Certain positions during diving may interfere with Auto Light operation.

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.

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 the city code starts to flash.



3. Press (C) 10 times.

[LT] appears on the display with [1] or [3] flashing.

4. Press (D) to select an illumination duration.

[LT1]: 1.5-second light

[LT3]: 3-second light



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