Casio 2891 Illumination, To specify the illumination duration, ❚ Positioning Your Arm Correctly, ❚To turn on illumination manually

Operation Guide 2891

Illumination

❚ Positioning Your Arm Correctly

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Full Auto Light Switch Precautions

• Frequent use of the full auto light switch can run down the battery.

• The full auto light switch may turn on illumination when the face of

An EL (electro luminescent) panel is used for illumination for easy reading in the dark. A full auto light switch turns on illumination automatically when you angle the watch towards your face for reading.

❚To turn on illumination manually

In any mode, press the L button.

• You can specify 1.5 seconds or 2.5 seconds as the duration of display illumination (“To specify the illumination duration”).

•Pressing the L button turns on illumination regardless of whether the full auto light switch is on or off.

You may hear a faint rattling sound when you move the watch around. This sound is caused by the movement of a metal bulb that controls operation of the full auto light switch, and does not indicate malfunction.

❚To turn the full auto light switch on or off

The full auto light switch turns on illumination automatically whenever you angle the watch towards your face for reading, but only when it is dark.

•The full auto light switch does not turn on illumination when surrounding light is bright.

The full auto light switch turns on illumination for the specified illumination duration in all modes when the watch is angled towards the face.

In any mode (except when a setting screen is on the display), hold down the L button for about three seconds to toggle the full auto

light switch on ( indicator displayed) and off (no indicator displayed).

Full Auto Light

Switch On Indicator

(3 seconds)

With the watch on your	Rotate your arm so the watch
wrist, position it parallel	is angled at about 40 degrees,
with the ground.	so you can read its face.
	At least 40
	degrees

•You should be wearing the watch on the outside of your wrist when using the full auto light switch.

•Make sure that the left (9 o’clock) and right (3 o’clock) sides of the watch are within ±15 degrees of

being parallel with the ground. The full auto light switch may not operate properly if the angle is greater than 15 degrees.

Illumination Precautions

•The light may be difficult to see under bright sunlight.

•Illumination turns off automatically if an alarm sounds, etc.

•You may notice a slight sound from the watch while illumination is turned on. This is the sound of EL panel vibration and does not indicate malfunction.

•Illumination is disabled during time calibration signal reception, while configuring sensor measurement mode settings, and during direction sensor calibration (“Calibrating the Direction Sensor”).

the watch is shaded by your sleeve.

• Illumination may not turn on immediately when you angle the

watch towards your face. This does not indicate malfunction.

• Illumination remains on for the specified duration (1.5 seconds or

2.5 seconds) only, even if you leave the watch angled towards

your face.

• The full auto light switch is disabled automatically whenever the

battery indicator reaches Level 4.

• Illumination may turn on unintentionally when you wear the watch

on the inside of your wrist, when you shake your arm, or when

you raise your arm. Be sure to turn off the full auto light switch

whenever you do not need illumination.

• Keep the full auto light switch turned off whenever you are

wearing the watch on the inside of your wrist.

• Electro-static charge and magnetism can interfere with full auto

light switch operation and even make operation impossible. If this

happens, lower your arm to the starting position and then raise it

again. If you still have trouble with illumination, try lowering your

arm down to your side and then raise it to your face for reading.

• The full auto light switch is disabled during the 20 seconds

required to take a direction reading with the digital compass.

To specify the illumination duration

1.	City Code
	In the Timekeeping Mode,
	hold down the E button
	for about two seconds
	until the city code and
	GMT differential start to
	flash. This is the setting
	screen.
	(2 seconds)

2. Press the D button three times so the seconds are flashing.

(3 times)

3.	1.5 Seconds
	Press the A button to
	toggle the display
	illumination between 1.5
	seconds and 2.5 seconds.
•	: 1.5 seconds
	: 2.5 seconds
	2.5 Seconds

4. When the setting is the way you want, press the

E button to exit the setting screen.

•The display also will exit the setting screen automatically if

you do not perform any operation for about two or three minutes.

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