MSA ALTAIR io 4 User Manual

9. Remove the calibration cap.
3.4.3 Fresh Air Baseline
WARNING!
Do not activate Fresh Air Baseline unless you are certain you are in fresh, uncontaminated air; otherwise, inaccurate
readings can occur which can falsely indicate that a hazardous atmosphere is safe.
If you have any doubts as to the quality of the surrounding air, do not use the Fresh Air Baseline feature. Do not use Fresh
Air Baseline as a substitute for daily calibration checks. The calibration check is required to verify span accuracy.
Failure to follow this warning can result in serious personal injury or death.
The device has the ability to run a Fresh Air Baseline as part of its start-up sequence. This will baseline the sensors at zero
(or 20.8% for oxygen) as long as the current sensor readings are within safe thresholds determined by the device. Fresh Air
Baseline can be configured in Grid to run automatically, require user input to execute, or be turned off.
3.4.4 Zero Sensors
WARNING!
Do not activate zero sensors unless you are certain you are in fresh, uncontaminated air; otherwise, inaccurate readings
can occur which can falsely indicate that a hazardous atmosphere is safe.
If you have any doubts as to the quality of the surrounding air, do not use the zero sensors feature. Do not use zero sensors
as a substitute for daily calibration checks. The calibration check is required to verify span accuracy.
Failure to follow this warning can result in serious personal injury or death.
Zero sensors will calibrate the zero readings (or 20.8% volume for oxygen) of the device. Zero sensors can be accessed
from the device's menu. Zero sensors allows for wider sensor tolerances than a Fresh Air Baseline when it is performed.
To zero the sensors:
1. Navigate to the Zero Sensors menu option.
2. Confirm you are in fresh air.
3. Press Start.
23 ALTAIR io 4
US 3 Getting Started

MSA ALTAIR io 4 Specifications

General

Brand	MSA
Model	ALTAIR io 4
Category	Gas Detectors
Language	English