®
Ratchet Adjustment
Headgear
Airduct
Connector
Breathing
Tube
Insert
Align Pin to Slot On
Airduct Connector and
Turn to Lock into Position
Headtop
Figure 10
Figure 8
Figure 9
PASS
FAIL
x
-9-
2.5 Airflow Test
1. Connect one end of the Breathing Tube to the Blower Unit.
2. Connect the Airflow Indicator to the free end of the Breathing Tube (detach from Airduct, if
applicable) (Fig. 8 and 9).
3. Turn on the Blower Unit and set the fan speed to the lowest airflow setting (Section 2.4).
4. Hold the Breathing Tube and Airflow Indicator vertically.
5. The airflow is sufficient only if the indicator ball reaches the minimum flow rate level (Fig. 9).
6. If the Airflow Indicator ball sits below the minimum flow rate level, it is necessary to charge the
battery or change the filter (Sections 2.2 & 2.3).
2.6 Headtop
2.6.1 Vision
®
Welding Helmet
1. Install and lock the breathing tube into the airduct on the Headtop (Fig 10).
2. Don the Headtop over your face. Adjust the headgear rachet wheel by pushing in and turning
until a satisfactory tightness is achieved.
3. Adjust the Face Seal fit with the pull cord by pressing on the lock and adjusting the cord
length until a tight fit is achieved between your face and the Face Seal (Fig 19).
