Suunto D9 [70/122] Gas change multiple breathing gas mixes

6.2.4. GAS CHANGE, MULTIPLE BREATHING GAS

MIXES

The D9 has as a special feature the possibility to set two addi-

tional nitrox mixes to be used during the dive. This feature can

be activated by setting the MIX2 and/or MIX3 “ON” and ente-

ring other parameters in the same way as on the primary gas.

Mix 2 and 3 settings are held until you change them (they will

not return to default settings automatically). Cylinder pressure

data is available for one wireless transmitter only. A dive is al-

ways started with MIX1, during the dive the D9 lets you chan-

ge to any enabled mix, which is within the set maximum oxy-

gen partial pressure. Tissue calculation during dive is based

on the mix you have selected.

The D9 allows gas change to enabled gas mixes during the

dive. Gas change is made by the following procedure:

- Press the UP button until the D9 starts to show “MIX

1in the middle display (Fig. 6.19).

- Scroll between enabled mixes with UP and DOWN

buttons

- Mix number, O2% and PO2 for the mixes are shown

when scrolling. If set PO2 limit is exceeded it will be

shown with the PO2 value blinking. The D9 does not

Fig. 6.21. Diving in Gauge

mode. Current dive time is

5 minutes 12 seconds.

Fig. 6.22. Dive Timer has

been reset. Last leg was

5min 23s. You are 12s into

current leg.