Function Tests On The Instrument; Alarm Test; Safe Led; Bump Test - MSA ALTAIR 4X Manual De Funcionamiento

3.6 Function Tests on the Instrument

Alarm Test

Turn ON the instrument. Verify that:
• all LCD segments are activated momentarily
• alarm LEDs flash
• horn sounds briefly
• vibrating alarm triggers briefly.

3.7 Safe LED

The instrument is equipped with a green "SAFE LED". This green SAFE
LED flashes every 15 seconds under the following conditions:
• the SAFE LED feature is enabled
• instrument is in Measurement mode (Normal Operation)
• combustible reading is 0% LEL or 0.00% CH 4
• Oxygen (O 2 ) reading is 20.8%
• Carbon Monoxide (CO) reading is 0 ppm or 0 mg/m
• Hydrogen Sulfide (H 2 S) reading is 0 ppm or 0 mg/m³
• no gas alarms are present (low or high)
• instrument is not in Low Battery warning or alarm
• CO, H 2 S, STEL and TWA readings are 0 ppm or 0 mg/m³.

3.8 Bump Test

Perform a Bump Test before each day's use to verify proper
instrument operation. Failure to perform this test can result
in serious personal injury or death.
This test quickly confirms that the gas sensors are functioning. Perform
a full calibration periodically to ensure accuracy and immediately if the
instrument fails the Bump Test. The Bump Test can be performed using
the procedure below or automatically using the Galaxy Test Stand.
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