Operating Modes and User Interface
43
Before you start the real-time fit factor display, the test subject
should put on the respirator and it should be properly attached to
the P
ORTA
C
OUNT
®
P
RO
Respirator Fit Tester.
When you press Realtime [
] the Real-Time Fit Factor Display
appears.
Real-Time Fit Factor Display
The P
ORTA
C
OUNT
®
P
RO
Respirator Fit Tester takes an ambient
concentration reading and stores the value. Next it purges the mask
and then begins continuous monitoring of the mask concentration.
The line graph lets you (and the test subject) observe the Fit Factor
reading as it fluctuates in near real time. (There is a delay of a few
seconds between when a change in fit occurs and when the graph
displays the change in fit factor.)
The graph pauses every 5 minutes while the P
ORTA
C
OUNT
®
P
RO
fit
tester takes a fresh ambient air measurement. Press
Restart
to force
a new ambient reading sooner.
Press
Exit
to close the Real Time display.
