Horn Change

This section will provide a brief description on how to change the horn in the ALTAIR io 4 Gas Detection Wearable.

Tools Required:

•

Phillips head #1 torque screwdriver

	1. Remove the four external screws with a Phillips head #1 torque screwdriver.
	2. Remove the front housing casing and attached sensor gasket. NOTE: The sensors may stick to the gasket when the front housing is removed. If this occurs, see Step 4 of Sensor Change to reinstall the sensor. 3. Remove the sensor gasket from the front housing. 4. Install the new sensor gasket into the front housing.
	5. Remove the horn by pulling it up and out of the clear bracket.
	6. Install the replacement horn by pushing it down into the clear bracket. NOTE: Make sure to align the two pins with the two receptacles. Install the horn so the text on the top surface of the horn is aligned as shown in the graphic.
	7. Install the front housing.
	8. Install the four external screws with a Phillips head #1 torque screwdriver. Torque to 6 in-lbs (0.68 N-m). 9. Calibrate the device per the instructions in the ALTAIR io 4 User Guide.