
System Overview
Each sensing element lasts approximately 4-8 hours, although in some cases this time will be
shorter or longer, depending on operating environment and sample type.
If sensing elements are stored properly in their packaging, their storage shelf life is guar-
anteed for one year. System diagnostics should always be used to determine the validity of
the Sensing element. sensing elements that have been removed from their packaging and
left open to the environment for extended periods should be discarded.
3.5.2 Sample swipes
Figure 3-5
: Sample swipe
Fido X4 Sample swipes are made of thin, thermally stable materials that are designed to effi-
ciently collect particulate samples from operational surfaces, and also effectively allow
desorption of those particles during sample processing.
Sample swipes can be reused. FLIR recommends that under normal operating conditions,
swipes may be reused up to 10 times. However, there are some exceptions. If an alarm is
recorded, which indicates the presence of explosive threat material, the swipe should be dis-
carded or handled according to your alarm resolution protocols. Also, if a sample swipe
becomes damaged during operation or becomes heavily soiled with dirt or debris, it should
be discarded.
As long as they are stored properly in their packaging, sample swipes have an indefinite shelf
life. sample swipes that have been removed from their packaging and left open to the envir-
onment for extended periods should be discarded.
For more information, see "Collecting a Particulate Sample" on p. 35.
3.5.3 Reference standard
Figure 3-6
: Reference standard, fully extended
20
4226044 (Rev. C) © 2020FLIR Systems, Inc.