INFICON Extrima Ex-certified Hydrogen Leak Detector - Manual (Page 30)

30
EN
INFICON - Operating Instructions EXTRIMA
8. Operating the Leak Detector
The detector operates in three modes.
1. The leak detection mode (Detection Mode), mainly used for detecting and locating
leaks but not quantifying them.
2. The hydrogen analysis mode (Analysis Mode) measures the concentration of
hydrogen.
3. The Combined Mode, (default mode) which is a combination of Detection and
Analysis mode.
The Detection Mode operates continuously while the Analysis Mode determines the
hydrogen concentration (and calculates a corresponding leak rate) in a step measu-
rement.
Detection Mode gives no numbers. It therefore needs no actual calibration. The
sensitivity of the sound signal and the moving bar on the display is set manually or
automatically, see below.
When using the instrument in Analysis Mode, it must be calibrated as described in
”Calibrate” on p. 21 and ”Calibration” on p. 34 in order to give correct figures.
To detect leaks
If all you wish to do is to detect the
presence of a leak, i.e. find out whether
there is a leak or not, then use the De-
tection Mode. The definition of Leak/No
Leak will then simply be ”A leak is a leak
when it can be detected by the detector,
set to a specific sensitivity”.
To set up:
The operation in Detection Mode is not
quantitative. No figures are given but the
signal is still increasing and decreasing
with gas concentration. Therefore, there is no actual calibration
to be done, but rather a setting of the
sensitivity to a desired level.
Detection Mode
Sensitivity
Volume – 8 + Menu