Warning - MSA Altair Manual De Operación

a. To change the expected calibration gas:
1) Press the TEST button.
• "TEST" "SET" "?" "ppm" displays.
2) Press the TEST button again to set (hold the TEST button
to scroll to a different value).
3) Wait three seconds to return to the Calibration mode.
b. Apply the appropriate test gas
• The display toggles between the current gas reading, the
hourglass and "CAL".
• Once the instrument passes calibration (this will take no
more than 90 seconds), "OK" displays.
• Otherwise, "ERR" displays.
• Wait five seconds to return to the normal operating mode.
The expected gas concentrations must match the gas con-
centrations listed on the calibration cylinder(s). Failure to fol-
low this warning will cause an incorrect calibration, which
can result in serious personal injury or death.
c. If "ERR" displays after calibration, the current settings did not
change. Immediately check that:
• The calibration cylinder matches the expected calibration
value expected in the instrument
• The calibration cylinder is not empty and has not expired.
• The regulator is 0.25 liters/minute
• The tubing is seated in the front instrument case during
gas calibration mode.
• If necessary, repeat steps 1 through 6.
• The display must read "OK"; if "ERR" remains, remove the
instrument from service.
d. Perform a bump test to confirm operation and activate the "√".

" WARNING

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