MSA Altair - Calibrating the Altair Single Gas Detector; When to Calibrate

Chapter4,
CalibratingtheAltairSingleGasDetector
• The Altair Single Gas detector is designed to be a maintenance-
free instrument, but it must be calibrated if it does not pass a Bump
Test or if calibration is required by local procedures.
• For oxygen instruments, perform a calibration if:
• there are changes in barometric pressure
(altitude changes)
• there are extreme changes in ambient temperature and
humidity (see TABLE 6-2, "Instrument Specifications").
• the instrument does not pass a bump test.
• For toxic instruments (CO and H
2
S), perform a calibration if any of
the following occur:
• physical shock
• extended use in extreme temperatures
• high concentration exposure
• the instrument does not pass a bump test.
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