Operation Manual

 If the buttons are held longer and SET 1 and SET 2 are both by-

passed, the unit will go to Simulator (DEMO) Mode which is

described on page 79.

 While in the Set Mode, if neither button is pressed during a pe-

riod of 2 minutes, the unit will revert to Surface Mode.

ENTERING SETTINGS - SET MODE 1

Sequence of the SET 1 Menu

FO2 > Max Depth Alarm > Elapsed Dive Time Alarm > PC

TO SET - FO2 (while in the Surface Mode)

Factory set for AIR, FO2 can also be set to values between 21 and

50% in increments of 1%. FO2 defaults to the AIR setting when-

ever the XR2 shuts off and is reactivated.

 Depress Both buttons simultaneously, release when SET 1 ap-

pears (2 seconds).

 Press and release the Advance (Front) button, FO2 appears with

the value flashing (Fig. 20).

 Press and release the Select (Side) button to increase the FO2

value 1% per second from 21 to 50%, then display AIR again;

or depress and hold the Select (Side) button to scroll from AIR

to 50%, then AIR. The scroll will pause momentarily at 32%

which is considered a commonly used setting.

 For each FO2 numerical value, the Max Depth that can be

achieved for a PO2 of 1.60 ATA (Fig. 21) will be displayed.

Fig. 20 - Set FO2

Fig. 21 - FO2 = 32%