INFICON Extrima Ex-certified Hydrogen Leak Detector - Manual (Page 24)

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INFICON - Operating Instructions EXTRIMA
Sensitivity
The sensitivity of the instrument in Detection Mode is adjusted by changing
the Sensitivity. The default value in the submenu Set Sensitivity is 8, but values
from 1 to 13 can be used. Each step doubles the sensitivity. In Dynamic Range
the sensitivity is Low, Mid or High.
Range Setting
Select type of Detection Mode Range: Manual Range, Auto Range or Dynamic
Range.
In Manual Range the detection mode sensitivity can be set manually. In Auto
Range the sensitivity can be set, but will be changed automatically if neces-
sary. In Dynamic Range sensitivity changes automatically by using an nonlinear
presentation on the bar, high sensitivity at the beginning of the bar and low
sensitivity at the end of the bar. In this mode both small leaks and gross leaks
can be detected in the same range.
Direct Sensitivity Adjustment
The feature Sensitivity (see above) can be turned off by setting Direct Sensitivity
Adjustment to OFF. Sensitivity changes made in the main screen are not stored
in the memory and the instrument will start with the sensitivity stored in the
Detection Mode Settings menu.
Leak Alarm Indication
If Leak Alarm Indication is set to OFF a leak will not be indicated neither by
the word LEAK on the display nor by light or sound signals.
Lowest Frequency (Detection Mode Settings)
The lowest frequency of the sound can be adjusted using Lowest Frequency,
i.e. when no gas is detected. The default value is 1 Hz but values from 0 to 10
Hz can be used. 0 Hz means that the loudspeaker is silent when the detector
has reverted to background level. The setting is not valid in Dynamic Range.
Explanations