1. The BG4 is approved for temperatures above 23 degrees Fahrenheit.

2. The Monitron switches on when the cylinder pressure reaches 70 PSI.

3. The cylinder is to be charged with compressed oxygen meeting USB specifications.

4. If a fault is found during the high-pressure leakage test the red indicator flashes for 15 seconds.

5. The mission must always be ended when the last low pressure warning output is at approximately 145 PSI (10 bar).

6. When the battery is discharged the alarm will sound 5 times.

7. Remove lens screws by turning them clockwise with a screw driver, while at the same time holding hexagon nuts.

8. One of the tools required for changing the mask lens is a 7mm open end wrench.

9. By-pass system damage can cause low dosage.

10. Leak in dosage lines can cause high dosage.