Suunto HelO2 [12/64] Setting the backlight

ADJUST WITH UP AND

DOWN BUTTONS. ACCEPT

WITH SELECT BUTTON.

4.1.4. Setting the backlight

Use the BACKLIGHT SETTING mode to turn the backlight on or off and to define how

long it stays on for (5, 10, 20, 30, or 60 seconds). When the backlight is turned off, it does

not illuminate when an alarm sounds.

ADJUST WITH UP AND

DOWN BUTTONS. ACCEPT

WITH SELECT BUTTON.

4.1.5. Setting the tones

The TONE SETTING mode allows you to activate or deactivate the tones.

ADJUST WITH UP AND

DOWN BUTTONS. ACCEPT

WITH SELECT BUTTON.

NOTE

When the tones are off, there are no audible alarms.

4.2. AC water contacts

The water and data transfer contact is located on the rear of the case. When submerged,

the water contact poles are connected by the conductivity of the water and the “AC” symbol

appears on the display. The AC text is shown until the water contact deactivates.

AC APPEARS IN THE TOP RIGHT

CORNER OF THE DISPLAY, WHEN THE DIVE

COMPUTER IS IN CONTACT WITH WATER.

Contamination or dirt on the water contact may prevent this automatic activation. It is

therefore important that the water contact is kept clean. The contact can be cleaned with

fresh water and a soft brush, for example a tooth brush.