2.
Adjust head cradle size to fit comfortably on head.
3.
While holding head harness strap ends with one hand, slide
the facepiece up onto your face as shown below.
Both Types of Suspension
4.
Take the bottom straps in both hands, place them at the back
of the neck and hook them together.
5.
Tighten the top straps first by pulling on ends to achieve a
comfortable and secure fit as shown.
6.
Tighten bottom straps using the rear adjustments (strap
tension may be decreased by pushing out on back side
of buckles).
7.
Perform a positive and/or negative pressure face fit check.
Face Fitting
The negative pressure fit check is recommended when using the 6035,
6038 and 2000 Series filters; the positive pressure fit check is
recommended when using other filters.
Positive Pressure Facefit Check
Place the palm of the hand over the exhalation valve cover and exhale
gently.
If the facepiece bulges slightly and no air leaks between the face and
the facepiece are detected, a proper fit has been achieved.
If air leakage is detected, reposition the respirator on the face and/or
readjust the elastic strap to eliminate the leakage.
Repeat the above facefit check.
Negative Pressure Facefit Check
For the 2000 Series filters, press your thumbs into the central
indentation of the filters, inhale gently and hold your breath for five or
ten seconds.
For the 6035 and 6038 filters, pinch the filter between thumb and
fingers to seal the filter cover to the body of the filter, inhale gently and
hold your breath for five or ten seconds.
If the facepiece collapses slightly a proper fit has been achieved.
If air leakage is detected, reposition the respirator on the face and/or
readjust the elastic strap to eliminate the leakage.
Repeat the above facefit check.
Fit Testing
The 3M 7500 Half Mask is a tight fitting facepiece and therefore
requires a fit test per wearer before use as per the COSHH regulations
2002.
For qualitative fit testing - 3M FT10 or FT30 fit test kits are available.
For quantitative fit testing - the 3M 601 adaptor is available.
