If a calibration is unsuccessful for two subsequent calibrations, the device will communicate an end of sensor life warning to
the user. Note that a span calibration can fail for many reasons other than a sensor at the end of its life. If a span calibration
failure occurs, factors such as remaining gas in the calibration gas cylinder, gas expiration date, security of the calibration
cap, etc. should be verified, and a calibration should be repeated prior to replacing the sensor.
NOTE: Live LEL readings displayed during calibration are indicative of calibrated values and are not necessarily indicative
of the true LEL of calibration gas being applied. For example, if using 2.5% volume methane to calibrate to a general
combustible reading, live readings during calibration will indicate a 100% LEL reading, even though calibration gas being
used is only 57% LEL.
WARNING!
Perform a calibration per the instructions in this user guide. Do not continue operation of a detector that is not able to pass
calibration.
Failure to follow this warning can result in serious personal injury or death.
ALTAIR io DOCK Calibration
1. Insert the device into the ALTAIR io DOCK Test Stand until it clicks.
2. The appropriate test runs automatically based on Grid-configured settings and indicates the calibration results upon
completion.
3. Remove the ALTAIR io 4 by pressing the gray release button.
Manual Calibration
The manual calibration test requires the following equipment:
• Proper, Unexpired Calibration Gas Cylinder
• 0.25 liters/min. Flow Regulator
• 1/8” ID Superthane Ester Tubing
• Calibration Cap
To perform the manual calibration test:
1. Verify the gas concentrations displayed match the calibration gas cylinder.
2. Navigate to the calibration menu option.
3. On the Zero Sensors screen, select Start when in fresh air.
21 ALTAIR io 4
US 3 Getting Started
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