User guide

Using the NiTek X
NiTek X Dive Computer User Manual v1.1 18
the setpoints have to be selected for each mix, only the mixes
that you plan on using.
Note: If you only plan on using one PO2 setpoint and mixture on
your dive, you only need to set that PO2 and mix.
To set PO2 setpoints:
1. If not already in closed circuit (C/C) mode, put the NiTek X
in C/C mode by simultaneously pressing and holding buttons
A and B for 2-3 seconds.
2. Press and hold button A for 3-4 seconds until “SP” is
flashing.
Note: If an external rebreather oxygen-cell has been
connected and calibrated, “EXT” can be displayed instead of
“SP”. Press button B to toggle between “EXT” and “SP”.
2. Press button A to enter the setpoint selection mode.
The setpoint PO2 value is flashing.
3. Press button B to change the PO2 to the desired value that
you want to set or change.
4. Press button A to select the mix setting.
5. Press button B to set the mix number.
6. When finished, press button A to return to the surface mode.
Setting Mix1 Through Mix7 Gas Percentages
Note: Be sure you have properly selected O/C or C/C mode
before setting the breathing mix(es) you plan on using on
your dive.
There are up to seven different mixes that can be used for any
particular dive. Not all of the mixes have to be set, only the
mixes that you plan on using. Each mix can have an oxygen
(FO2) and helium (FHe) setting.
• FO2 percentages can be set for 8 to 99 percent oxygen
• FHe percentages can be set for 0 to 92 percent helium
Note: If you only plan on using one mix on your dive, you only
need to set mix1.
To set gas mix percentages:
1. Press button A until “SET” is displayed.
2. Press button B to enter the dive set up option screen.