Preventive Maintenance, Service, and Troubleshooting 77
9. Align the two halves
of the alcohol
cartridge and press
firmly until they snap
together.
Operation in High Humidity
When using PortaCount Model 8040/8048 in a high humidity
environment, the wick assembly will retain water moisture more
rapidly than normal and will require more frequent wick replacements.
Water moisture collecting in the wick is a normal occurrence, but is
greatly increased with a rise in humidity. Under normal conditions with
a dry wick freshly charged with isopropyl alcohol, the PortaCount Fit
Tester will operate approximately five hours before the “Low Alcohol
Message” appears. This average run time will start to decrease when
operating the PortaCount Fit Tester in higher humidity. To keep this
average run time as long as possible, replace the wick each day with
a dry one. To dry out the wick you removed from the PortaCount Fit
Tester, place it in a well-ventilated area that has a humidity level of
50% or lower and let it set overnight (approximately 16 hours). The
wick should then be dry and ready to use again. The 16-hour dry time
is based on an 8-hour operation in a humid environment. The total dry
time will vary depending on the number of operation hours on the
wick in high humidity environment.
Nozzle Cleaning
If the small (pin-hole size) internal nozzle becomes clogged with lint
or other debris, the following procedure should clear it. The symptom
of a clogged nozzle is a low (perhaps zero) ambient particle count.
This usually, but not always, causes the Particle Check and/or Max
Fit Factor Check to fail. There are two procedures. Perform
Procedure A first, then Procedure B if necessary.
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