GB
OPERATION MSA
40 ALTAIR 5 - Operating Manual
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 green SAFE LED is enabled
• instrument is on the normal Measure Gases page
• combustible reading is 0% LEL or 0%CH
4
• Oxygen (O
2
) reading is 20.8%
• Toxic sensor readings are 0 ppm
• no gas alarms are present (low or high)
• instrument is not in Low Battery warning or alarm
• Toxic sensor, STEL and TWA readings are 0 ppm.
3.8. Calibration Check
The calibration check is simple and should only take about one minute. Perform
this calibration check before each day’s use for each installed sensor.
(1) Turn ON the ALTAIR 5 or ALTAIR 5 IR Multigas Detector in clean, fresh air.
(2) Verify that readings indicate no gas is present.
(3) Attach regulator (supplied with calibration kit) to the cylinder.
(4) Connect tubing (supplied with calibration kit) to the regulator.
(5) Attach other end of tubing to the instrument.
(6) Open the valve on the regulator, if so supplied.
• The reading of the ALTAIR 5 or ALTAIR 5 IR Multigas Detector display
should be within the limits stated on the calibration cylinder or limits
determined by your company.
• If necessary, change cylinder to introduce other calibration.
• If readings are not within these limits, the ALTAIR 5 Multigas Detector
requires recalibration (see chapter 3.9).
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