User guide

Using the NiTek X

NiTek X Dive Computer User Manual v1.1 40

Oxygen-analysis mode, screen 3

(5) and (6): mV reading and O2 percentage: This shows that

the oxygen-cell has been calibrated and is displaying its output.

To enter the OXY mode:

1. Using the Battery Door Tool, remove the knurled cap at

upper left of NiTek X and attach the appropriate external

cable and oxygen-cell to the connector. Be sure to hold the

computer with its left side facing down to minimize any

water droplets from getting into the compartment.

2. Repeatedly press button A until “OXY” is displayed.

3. Press button B to enter the OXY analysis mode screen.

“0 mV Uncalibrated” is displayed on the screen.

4. Press button A

“CAL O2” is displayed on the screen.

5. Press button B to enter calibrate-mode of oxygen-cell, using

a source of 100% oxygen for reference.

“xx mV calibrated” (where xx is the mV reading of your

oxygen-cell) and the oxygen percentage is displayed on the

screen.

6. To return to surface mode, press and hold button A for 2 to 3

seconds.

7. Set the NiTek X to “C/C” (closed-circuit) mode. It will

display “EXT” instead of “SP” (setpoint), indicating that it is

reading the PO2 level of the external oxygen-cell.