Specifications

One Double Beep = Potential Danger

During situations that may pose potential danger, one Double Beep is emitted

from the 500AI. These situations include:

• Entry into decompression.

• Breathing Gas Time Remaining decreasing to 5 minutes.

• Partial pressure of oxygen (PO2) equal to or greater than 1.40 ATA.

Continuous One Beep per Second = Immediate Danger

When the 500AI senses immediate danger to you, it emits One Beep per Sec-

ond until the situation is corrected, if the Audible Alarm feature is set ON (de-

scribed later). If the Audible Alarm feature is set OFF, you will be alerted in-

stead by one Double Beep. Immediate Danger situations include:

• Ascending to a depth shallower than a Required Stop Depth.

• Upon surfacing, if shallower than a Required Stop Depth for less than 5

minutes.

• Partial pressure of oxygen (PO2) equal to or greater than 1.60 ATA.

• Ascending at a rate that exceeds 60 fpm (18 mpm).

• Descending deeper than the Depth Alarm Set Point.

• Gas Time Remaining equals zero (0:00).

• Oxygen accumulation greater than the allowed per dive or 24 hour limit.

BEEP!

BEEP...