Span Calibration - MSA ALTAIR 4X Manuel D'utilisation

If calibration lockout option is NOT selected:
• ZERO screen displays.
3. With the instrument exposed to fresh air, press the
confirm the ZERO screen. A sensor Refresh and Zero Calibration
now occur.
NOTE: Alternatively, press the ▼ button to execute a
Fresh Air setup (FAS). See section 3.2.2 for more details.
• After ZERO calibration completes, the instrument momentarily
displays "ZERO PASS" or "ZERO ERR" along with the flag of any
sensor that failed.
NOTE: During instrument zero calibration, the oxygen sensor is
also span calibrated to 20.8% oxygen fresh air, adjusting
the calibration curve as needed. During instrument span
calibration, the O 2 sensor's accuracy is checked against a
known oxygen gas concentration without adjusting the
calibration curve.

3.9.2 Span Calibration

To skip the Span procedure, push the ▲ button.
If no button is pushed for 30 seconds, the instrument returns to the
Measuring mode.
1. Once the zero is set, the span screen displays.
2. Connect the appropriate calibration gas to the instrument.
button to
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