Mask-Mounted Regulator; Vibralert; Heads-Up Display - 3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions

Fit testing per OSHA Standard 29 CFR Part 1910.134 Appendix A, or ANSI/AIHA/ASSE Z88.10, current edition,
requires testing in the negative pressure mode using Quantitative Fit Test (QNFT) protocols deemed acceptable by
those standards. For quantitative fit testing, 3M Scott Fire & Safety facepieces require use of a Fit Test Adapter or
equivalent and appropriate negative pressure testing equipment. A Mask Seal Kit may also be required to attain a
proper fit. See "Appendix G: Facepiece Fitting" on page

Mask-Mounted Regulator

The removable pressure-demand breathing regulator mounts directly to the facepiece and is equipped with an air-
saver mechanism and a red purge knob.
TIP
The auto air-saver switch on the E-Z Flo C5 regulator (compatible with the 3M Scott Vision C5
facepiece) is located on the latch for mounting the regulator to and removing it from the facepiece. When
properly engaged, the latch locks the regulator in place on the facepiece and prevents it from rotating.

Vibralert

All models of the Air-Pak X3 Pro respirator are equipped with the Vibralert end-of-service indicator alarm in the
mask-mounted regulator. The Vibralert serves as an end-of-service time indicator and alerts you of a malfunction in
the dual-path pressure reducer. In normal operation, the Vibralert vibrates the breathing regulator and facepiece to
warn you by both sound and feel that approximately 33% of full cylinder pressure remains. In addition, if the
primary air path of the pressure reducer becomes blocked or should fail closed, the secondary air path will
automatically begin supplying air to the breathing regulator, and the Vibralert will warn you of the malfunction.

Heads-Up Display

The Heads-Up Display (HUD) is an independent end-of-service time indicator alarm attached to the
mask-mounted regulator and is standard on respirators required to have two independent redundant alarms. The
HUD provides a visual indication of the air supply with four lights that appear just below the field of vision within the
facepiece. A separate low battery light warns you when the batteries must be replaced. The HUD detects cylinder
pressure directly and is totally independent of the Vibralert end-of-service indicator alarm.
TIP
The HUD of the 3M™ Scott™ E-Z Flo C5 regulator (compatible with the 3M Scott 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.
For more information about HUD lights, see
P/N 595373-01 Rev C 202004
MAJOR COMPONENTS OF THE RESPIRATOR
59.
"Testing the Heads-Up Display" on page 13.
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