Performing Operational Testing; General Testing; Testing The Regulator - 3M SCOTT AIR-PAK X3 PRO Operating & Maintenance Instructions

INSPECTING THE RESPIRATOR

Performing Operational Testing

Testing includes checking the basic operation of the respirator, followed by more thorough checks of the regulator,
HUD, sensor module lights, and batteries.

General Testing

1 Check that the breathing regulator purge valve (red knob on regulator) is closed (the pointer on the knob points up).
2 Fully depress the center of the air saver/donning switch on the top of the E-Z Flo+ regulator or firmly pull the auto
air-saver switch on the E-Z Flo C5 regulator latch and release.
3 Slowly open the cylinder valve by fully rotating the knob counterclockwise (approximately two-and-one-half
turns). Confirm that the following occur:
•
The Vibralert end-of-service indicator alarm sounds and then stops.
•
The HUD initializes.
– All lights turn on for 20 seconds before displaying the cylinder's air supply level.
– If the low battery light remains lit or begins to flash, replace the batteries before proceeding. See
"Chapter 5: Replacing
•
If the respirator is equipped with a Personal Alert Safety System (PASS) device, also known as a distress
alarm, you will hear three quick chirps when the cylinder valve is opened.
4 Check that the remote pressure gauge is operating properly and that its reading is within 10% of the value on the
cylinder pressure gauge.
5 Don the facepiece or hold the facepiece to your face to create a good seal.
a Inhale sharply to automatically start the flow of air. Breathe normally from the facepiece to ensure proper
operation.
b Remove the facepiece from your face. Confirm that air flows freely from the facepiece.
6 Fully depress the center of the air saver/donning switch on the top of the E-Z Flo+ regulator or firmly pull the auto
air-saver switch on the E-Z Flo C5 regulator latch and release. The flow of air from the facepiece will stop.
7 Examine the complete respirator for air leaks. No air should leak from any part of the respirator.

Testing the Regulator

The regulator is equipped with a red purge valve (knob), which allows air to flow into the facepiece in an
emergency without breathing on the respirator. The purge control is also used to release residual air from the
respirator after the cylinder valve is turned off.
To check the purge valve
1 Rotate the purge valve one-half turn counterclockwise (turn the valve so that the pointer on the knob points
down). Air flows freely from the regulator.
2 Rotate the purge valve one-half turn clockwise to its fully closed position (the pointer on the knob points up). Air
flow from regulator stops.
3 Push in and rotate the cylinder valve knob clockwise to close the valve.
4 When the cylinder valve is fully closed, open the purge valve slightly to vent residual air pressure from system. As
the residual air pressure vents from the system, the remote pressure gauge needle will swing from full toward
empty.
12
Batteries" on page 43.
P/N 595373-01 Rev C 202004