1. After attaching your regulator to the cylinder turn on the air.
2. To turn on the green gouge light just pass daylight of your torch light over the face of the bio-gauge and it will automatically turns on (Flashing).
3. When your cylinder pressure reaches 5MPa the orange light automatically turn on (Flashing).
4. After diving remove the regulator from the cylinder. This will automatically turn off the bio-gouge functions.