3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions page 30

INSPECTING THE RESPIRATOR
TIP
The HUD of the E-Z Flo C5 regulator (compatible with the Vision C5 facepiece) includes three additional
lights to indicate the following:
•
Initiation of a PAR request
•
Initiation of an evacuation command or a system integrity alarm
•
Actuation of a Personal Alert Safety System (PASS) full alarm (distress alarm)
There is also an externally facing light that indicates the air supply in the cylinder. This light flickers before
displaying the cylinder's air supply level.
1/3 - 1/2 full: Yellow light flashes slowly
< 1/3 full: Red light flashes rapidly
E-Z Flo Regulator HUD on AV-3000 HT
1/3 - 1/2 full: Yellow light flashes slowly
< 1/3 full: Red light flashes rapidly
E-Z Flo C5 Regulator HUD on Vision C5
•
If the SCBA is equipped with a PASS device, the lights in the HUD will flash in an alternating pattern when the
distress alarm goes into pre-alarm mode. In addition, the color of the light illuminating the gauge dial will be the
same as the current cylinder level light showing in the HUD.
•
The HUD has an automatic brightness control that dims the display in low-light situations and returns the display
to full brightness in bright-light situations.
•
When the batteries require changing, the low-battery indicator at the right of the display lights for 20 seconds
and then begin to flash once per second.
When the low battery indicator is actuated, the batteries still have sufficient life to operate the HUD for a period
longer than the longest duration cylinder installed on the respirator. However, you must change the batteries im-
mediately upon termination of use of the respirator or before reentry into a hazardous atmosphere. See
"Chapter 5: Replacing
14
> 3/4 full: 2 green lights
1/2 - 3/4 full: 1 green light
> 3/4 full: 2 green lights
1/2 - 3/4 full: 1 green light
Figure 2-9 HUD Operation
Batteries" on page 43.
Low battery: Red
Low battery: Red
P/N 595373-01 Rev C 202004