Pro N
2
Alarm nitrogen Analyzer
Nuvair
Page 8
www.nuvair.com
3.1. Calibration Methods
Calibration should always be performed at the same temperature and humidity conditions as
the gas being measured. This is not always possible, for example, in a tropical environment
where dry breathing gas from a high-pressure SCUBA cylinder will be measured after
Analyzer calibration has been performed in the warm, humid ambient air. Under these
conditions a calibration correction value may be required, or dry air must be used for
calibration. It may be required for the analyzer to be calibrated to a certified calibration gas.
Obtain proper training before attempting special calibration procedures. Improper
calibration may result in the use of incorrect breathing gas mixtures, which may cause
serious injury or death to the person using the gas mixture.
To assure the greatest accuracy, use a Calibration Gas with a nitrogen concentration as
close as possible to the expected concentration in the gas being produced.
4.0 Operation
Prior to each Analyzer use:
1)
Remove the flow adapter cap to expose the sensor to ambient air,
OR
start the flow of
Calibration Gas. Calibration gas must contain 20.9- 21% oxygen.
2)
Turn unit the on by holding the
“On/Off”
button until the display shows
“On”
, then release
the button. The
“Att”
(Wait) message will be displayed, followed by the software version.
3)
The analyzer stores the previous calibration values, which need to be reset.
4)
To calibrate, depress and hold the
“On/Off”
and
“Adjust”
buttons until the screen
changes. Release the buttons and wait until the screen reads
79.0
.
5)
Install the flow adapter cap on the sensor.
6)
The instrument is now ready to read nitrogen concentration of the gas. You may now
begin nitrogen production.
7)
The display will now show the nitrogen percentage of the gas.
8) ANY TIME THE ANALYZERS ARE RE-CALIBRATED THE SENSORS MUST BE
EXPOSED TO AMBIENT AIR. REMOVE THE FLOW ADAPTER CAPS AND LET THE
SECURE THEM OUT OF THE WAY IN SUCH A MANNER THAT ANY NITROGEN
ESCAPING FROM THEM WILL NOT AFFECT THE CALIBRATION READING.
Tip:
You can check the battery life and current temperature by holding Adjust button for 3
seconds. The display will alternate from battery life to current temperature (Celsius) twice
before returning the home screen.
