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9. Set-up
9.1 Preferences
It is possible to change select properties of the analyzer in the basic mode (measuring of
He/O
2
) in
Menu/Preferences
. Individual parameters have the following significance:
Brightness
of the display in the scale of 1 to 127. The selection of low brightness (1) preserves
the battery; the highest brightness (127) is suitable for use in strongly lit places. For
temporarily increasing the display’s brightness, simply hold down the pressed
.key.
When activating the
Heighten brightness
option, the brightness is automatically increased to
maximum if the analyzer is powered with an external power-supply adapter.
The option
O
2
cell used
is activated as standard. When deactivating, the O
2
value is ignored
and replaced with the value shown in the following
O
2
substitute
parameter. This option allows
emergency use of the analyzer with a worn-out oxygen sensor for measuring the concentration
of helium. In such a case, the correct setting of the oxygen concentration in the analyzed mix
increases the precision of measuring the concentration of helium (on the order of tenths of
a percent).
Averaging
activates the calculation of the moving average from the set number of values of
the He concentration. The number of averaged values is set with the
Values to avg.
parameter.
Содержание HE/02
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