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3.0 PRE-USE CHECKOUT/CALIBRATION
Follow these steps before using the N2 Analyzer
1. Prior to turning on the unit, a protective film covering the threaded sensor
face must be removed. After removing the film, wait approximately 20 minutes
for the sensor to reach equilibrium.
2. Pre-assembly, if required.
•
Thread the barbed adapter onto the oxygen sensor.
•
Connect the clear tubing to the barbed adapter.
3. Using the "ON/OFF" key , make sure the unit is in the power "ON” mode.
4. Press and hold the Calibration Key for 3 seconds until the display
reads “CAL”. This will calibrate the N2 Analyzer to room air. Thereafter, we
recommend calibration on a weekly basis.
A 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
•
If you are unsure about the displayed N2 percentage. (see Factors
influencing accurate readings.)
5. The N2 Analyzer is ready to use.
4.0 OPERATION PRINCIPALS
The instrument display corresponds directly to the oxygen sensor. The oxygen
diffuses through the membrane and an electrical current is generated that is
proportional to the partial pressure of oxygen in the gas sample. The oxygen
percentage is subtracted from 100, with the remainder being displayed as
percent nitrogen. The sensor has a minimal response to gases other than oxygen.
5.0 FACTORS INFLUENCING ACCURATE READINGS
Elevation Changes
•
Changes in elevation result in a reading error of approximately 1% of reading
per 250 feet.
•
In general, calibration of the instrument should be performed when elevation
at which the product is being used changes by more than 500 feet.
Temperature Effects
The N2 analyzer will hold calibration and read correctly within ±3% when in
thermal equilibrium within the operating temperature range. The device must
be thermally stable when calibrated and allowed to thermally stabilize after
experiencing temperature changes before readings are accurate.
866.4.Maxtec www.maxtec.com
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