Pro N
2
Alarm nitrogen Analyzer
Nuvair
Page 11
www.nuvair.com
4.4. Calibration nitrogen Value (O2c)
The
“O2c”
value is the calibration value assigned based on the percentage of oxygen in
the gas being analyzed. The default calibration value is 21.0 (corresponding to 21% O
2
and 79% N
2
in ambient air). It is not necessary to modify this value if the unit is always
calibrated in ambient air.
1.) Press the “Prog” button until “AL 1” appears on the display. Use the “On/Off” button
to cycle through the settings until you reach the “O2c” screen.
2.) The blinking digit shows the cursor position.
3.) Press the “Pro” button to increase the value (from 0 to 9)
4.) Press the “Adjust” button to cycle through the digits.
5.) To complete your entry and save the O2c value, press the “On/Off” button.
The nitrogen calibration value will be the same value of the calibration set when the
instrument is switched on. If, during auto-calibration the nitrogen percentage of the
gas flowing across the sensor is a different value from calibration set in the instrument,
a failed calibration is obtained and the wrong gas percentage will be displayed. Wrong
nitrogen analysis may lead to death.
The calibration value of the Pro N
2
Alarm is factory set at 21% and any adjustments to
this value will change the analyzers ability to properly ready the % of nitrogen in a gas.
A wrong value in this parameter will give a wrong reading of N
2
concentration and the
instrument will not be accurate. All the analysis concentration shown on the display
will be wrong. If you modify this setting you must test the analyzer for accuracy with
certified testing gas. Do not modify this value. Wrong nitrogen analysis may lead to
death.
