Warning - MSA ALTAIR Pro H2S Manual De Operación

5. Once the instrument successfully calibrates and the "OK" displays:
• "CAL" "?" displays.
6. While the "CAL" "?" displays, press the TEST button to enter the
Gas Calibration mode.
• The current expected test gas is shown (in ppm).
a. To change the expected calibration gas:
1) Press the TEST button.
2) Press the TEST button in rapid succession to increment.
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, "OK" displays.
Calibration time is dependent on the sensor installed. See
TABLE 6-2.
• Otherwise, "ERR" displays.
• Wait five seconds to return to the normal operating mode.
The expected gas concentrations must match the gas
concentrations listed on the calibration cylinder(s). Failure to
follow 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.
• The display must read "OK"; if "ERR" remains, remove the
instrument from service.
d. Perform a bump test to confirm operation and activate the " ".
• "TEST" "SET" "?" "ppm" displays.
• The TEST button can be held down to increment by
larger values..

! WARNING

• If necessary, repeat steps 1 through 6.
4-3