INFICON Extrima Ex-certified Hydrogen Leak Detector - Manual (Page 3)

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EN
INFICON - Operating Instructions EXTRIMA
1. General
The Hydrogen Leak Detector Extrima
is an extremely sensitive and selective,
intrinsically safe detector for hydrogen
gas (H
2
). It is especially designed for leak
detection using Hydrogen Tracer Gas,
(Hydrogen diluted with Nitrogen down
to a safe concentration), which is an
effective and economical tracer gas for
leak testing.
Extrima detects hydrogen in air at at-
mospheric pressure with no need for
vacuum pumping. It is especially suitable
for applications where high sensitivity
and selectivity is required in combination
with simplicity and reliability.
The instrument has three main functions:
Detection Mode, Analysis Mode and
Combined Mode.
- Detection Mode is used when there is a
need to detect and locate a leak quickly.
The results are shown as a moving bar.
- Analysis Mode is used when there is a
requirement to analyse the concentra-
tion of hydrogen gas in the air and thus
determine the size of the leak. The results
are shown by figures in PPM or other unit,
selected by the user.
- In Combined Mode a moving bar and
figures are shown.
In all three cases the results are also indi-
cated by an audio signal. The frequency
of the sound depends on the measured
signal, which allows the user to work
without having visual contact with the
display.
Ex
An intrinsically safe instrument is construc-
ted to remove all ignition sources. This
means that even in the event of a failure
in the circuits, the surface temperature
and available spark energy is limited to
given values.
Read this User Guide carefully before using the instrument. You must, under
all circumstances read and understand the section ”Special conditions for
safe use” on p. 5. On ”5. To get started” on p. 13, there is a descrip-
tion of how to get started quickly. However, to be able to utilise all the
functions of the instrument, one should also read all the other sections in
the guide. When running through the menu section for the first time, it is
a good idea to have the instrument in front of you so that the build of the
menu system can be recognised quickly. It is also your responsibility as user
to assess whether the certification code of the instruments makes it suitable
for use in your hazardous location.
The guidelines for the protective measu-
res are given in international standards. A
third party, a so called Certification Body
has assessed and tested the compliance
with the relevant standards and issued a
certificate stating the classification that
the instrument fulfills.