OHD Quantifit2, Руководство пользователя

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Chapter 20 | Troubleshooting | Graph Behavior
20
Troubleshooting
4. Try a different respirator. Many respirators seem to fit well but are not properly sized to a
specific wearer. In other cases, a different size or style may be better suited for the
individual wearer.
Failure to reach challenge pressure
Like the large leak, when the traceline does not reach the challenge pressure line, this indicates
that there is a moderate leak between the QuantiFit2 and the person wearing the respirator.
1. Check all connections for proper attachment.
2. Check to ensure that the QuantiFit2 respirator adapter is properly attached to the
respirator. Look for cross-threading, loose connection, etc.
3. Check respirator for proper tightness to the face and check that no hair, beard stubble,
unique face characteristics, or other objects inhibit a good face-to-facepiece seal.
4. Try a different respirator. Many respirators seem to fit well but are not properly sized to a
specific wearer. In other cases, a different size or style may be better suited for the
individual wearer.
Perfect graph but still fails
When the graph looks like a perfect fit test, but the fit factor is too low to pass, this means that
there is a leak, but it’s not a huge leak. This would be related to a leak in the integrity of the
respirator, a poor donning, or in the fit of the respirator. Make adjustments necessary, and if the
test subject cannot pass, they would need to try a different size or even different brand.
1. As in other leakage situations (see HIGH LEAKAGE), check all tube connections, adapters,
and adapter connections to respirators.
2. Check for proper tension of respirator to face.
3. Try a different size or different respirator.
4. Have fit test adapter checked for leaks (call OHD for this service).