Advanced settings
7.4.2 Correction factor
The correction factor allows correction of the measured leak rate by the detector when it
is combined with parallel pumping.
Displays: digital and
bargraph
Fig. 2
1
:
"Correction" screen using a function key
Only the digital display is corrected by the correction factor: the correction factor does
not apply to the bargraph display.
7.4.3 Test mode
A hard vacuum test can be performed as soon as one of the test modes is reached.
The leak detector will automatically switch to the test mode selected when the internal
pressure reaches the crossover threshold
.
Fig. 2
2
:
"Mode" screen using a function key
7.4.4 Automatic Cycle End
This function allows automatic control of the roughing time and measurement time in a
hard vacuum test.
From the "Settings" screen, press [Test].
HV Correction/Sniff.
Correction
Activate the correction factor application.
Set the correction factor to be applied.
For quick access from the control panel, set a function key for [Correction]
Depending on the concentration of tracer gas used for detecting leaks, the leak
rate displayed changes.
– Example: the leak rate displayed with a calibrated leak of 1·10
-8
Pa·m
3
/s
(1·10
-7
mbar·l/s) (with 100 %
4
He) connected to the detector's inlet.
% He in the gas used
100 %
50 %
5 %
1%
leak rate displayed on
the leak detector without
correction
1·10
-8
Pa·m
3
/s
1·10
-7
mbar·l/s
5·10
-9
Pa·m
3
/s
5·10
-8
mbar·l/s
5·10
-10
Pa·m
3
/s
5·10
-9
mbar·l/s
1·10
-10
Pa·m
3
/s
1·10
-9
mbar·l/s
Correction value
1
2
20
100
Leak rate displayed on
the leak detector with
correction
1·10
-8
Pa·m
3
/s
1·10
-7
mbar·l/s
For quick access from the control panel, set a function key for [Mode]
By default, the leak detector is set to work in a hard vacuum test, in the most sen-
sitive test mode: this setting meets the majority of the operators' needs.
From the "Settings" screen, press [Test].
Mode
Set the test mode.
From the "Settings" screen, press [Test] [Cycle End].
Automatic cycle
end
Activate the function.
Function activated if ’automatic’ is set.
51
0870231897_0001_IM_en
Summary of Contents for 0659230708
Page 79: ...Note 79 0870231897_0001_IM_en...
