INFICON Ecotec E3000 Multigas-Sniffer-Leak Detector User Manual
Page 36
36
6 Operation
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The following table shows the adjustable units and the associated limits for the trigger
value.
Search & Limit (search
threshold and display
limit)
In the window “Search threshold display limit”, you can set the search threshold with the
keys on the left and select the factor for the lower display limit with the keys on the right.
The search threshold is a percentage of the trigger value and serves as an additional
warning level. Smaller leaks that are even below the trigger value can also be reported,
when needed,
.
The absolute value of the search threshold is calculated by the device and displayed.
Fig. 23: Setting display limit and search threshold
With the function “Display limit”, you can hide measurement results that are below the
expected leak rate. This makes the measurement view clearer especially in view of the
measurement bar because smaller measurement results are hidden.
You can define the lower display limit as a multiple of the lowest measurable leak rate (1
,
2
, 5 , 10 , 20 , 50 , 100 ).
Internal calibration
You can deactivate internal calibration. If it is deactivated, only the more precise external
calibration can be made for the gas,
see “6.4.2 Calibration”, page 37
Internal calibration is precluded from the start if the mass position of a gas is outside the
range from 40 to 105 amu.
Mass and position
With the selection of a gas from the gas library, a standard mass position is automatically
selected for gas to be measured. If the device could respond to other substances in the
working environment for the leak test, we recommend selecting another mass position for
the verification of the required gas. You can find a list of all possible gases with their
normal and alternative mass positions in the Appendix,
.
Table 5: Trigger value according to unit
Unit
Lower trigger value limit
Upper trigger value limit
g/a
0.1
1000
oz/yr
0.004
100
ppm
1
999999
mbar l/s
2
10
-7
9.9
10
-2
Pa m
3
/s
2
10
-8
9.9
10
-3
atm cc/s
2
10
-7
9.9
10
-2
Torr l/s
2
10
-7
9.9
10
-2