4226044 (Rev. C) © 2020 FLIR Systems, Inc.
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FLIR Fido® X4 Operations Manual
5.2.1.1 Reference Presentation Error
If “Reference Presentation Error” appears, the most likely cause is that the thermal
desorber malfunctioned or the reference standard was removed too early. Select
OK
to dis-
miss the message and retry the verification.
Figure 5-12
: Reference Presentation Error screen
5.3 Collecting a Particulate Sample
5.3.1 Trace detection
The Fido X4 is designed for trace detection of explosive particulate. Trace is defined as an
amount of a substance or chemical that cannot readily be seen by the naked eye. Substance
quantities are often less than 1 microgram.
In order to detect trace amounts of explosives, it is important to collect the sample properly
on the sampling swipe and present the swipe properly to the system. This section will
provide guidance on how to properly locate and take a trace sample.
5.3.2 What to sample
Sample “first touch” areas. These are surfaces a person would often lift, slide, move, zip,
tuck, press, or otherwise touch. Examples include bag fastenings and vehicle keys, door
handles, and steering wheels.