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Section 17 - Nitrogen Analyzer Instructions
Automatic Calibration
After the unit is turned on, it will automatically calibrate to room air. The display should be stable and reading 79.1%.
To check the nitrogen concentration of a sample gas: (after the unit has been calibrated)
1.
Connect the Tygon tubing to the bottom of the analyzer by threading the barbed adapter onto the oxygen sensor.
2.
Attach the other end of the sample hose to the sample gas source and initiate flow of the sample to the unit at a
rate of 1-10 liters per minute. 2 liters per minute is recommended.
3.
Using the ON/OFF key, make sure the unit is in the power “ON” mode.
4.
Allow the nitrogen reading to stabilize. This will take approximately 30 seconds or more.
Calibrating the N2 Analyzer
Calibrate the N2 analyzer upon initial power-up. Thereafter, Maxtec® recommends calibration on a weekly basis. To serve
as a reminder, a one week timer is started with each new calibration. At the end of one week a reminder icon appears on
the bottom of the LCD. Calibration is recommended if the user is unsure when the last calibration procedure was performed,
or if the measurement value is in question.
With compressed air (79.1% N2), new calibration is required when:
•
The measured N2 percentage in 79.1% N2 is above 80.1% N2
•
The measured N2 percentage in 79.1% N2 is below 78.1% N2
•
The CAL reminder icon is blinking at the bottom of the LCD
A simple calibration may be made with the sensor open to static ambient air.
Calibration Errors and Error Codes
The nitrogen purity analyzer has a self test feature built into the software to detect faulty calibrations, oxygen sensor failures,
and low operating voltage. Refer to the following table for an explanation of error codes and possible actions to take.
Component
Description
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