Specifications 91
Fit Factor Measurement
Direct measurement of fit factor (C
out
/C
in
)
(Respirator leakage is measured simultaneously while test subject
moves and breathes.)
PortaCount Fit Testers provide fit testing compliant with OSHA
29CFR1910.134, ANSI/ASTM Z88.10-2001, CSA Z94.4-2011,
HSE 282/28.
Electrically noisy power networks in a building can cause USB
communication drop outs for USB HUB (804004) and USB
Extender Cable (804005). These types of emitted electrical noise
can be introduced by equipment that draws high current or by
environmental conditions such as lightning. These conditions will
not harm the PortaCount Models 8040 or 8048. USB
communications over USB HUB (804004) and USB Extender
Cable (804005) are trustworthy once the electrical noise is reduced
or stops.