Inficon ULTRATEST UL3000 Fab, Перевод оригинальной инструкции по эксплуатации

Страница: 67 / 140

INFICON Operation | 6
UL3000-Fab-Operating-instructions-iina73en1-08-(1910) 67 / 140
6.3.10 Set and use the function ZERO
Why should I use
ZERO?
To be able to clearly measure small leakages the function ZERO should be used.
With each leak detection there is a "Background signal" (see "Definition of terms
[
}
8]") that disrupts the search or the measurement of leakages.
• To hide the background signal, activate the function ZERO.
• You can also use ZERO to hide a currently displayed leakage, which interferes
with searches for other or even smaller leaks.
A currently displayed leak is hidden through ZERO.
By using the function ZERO not only is the background signal hidden, but also the
representation of a current leak.
► If you want to prevent this, select the function ZERO only if not measuring a leak at
the same time.
Activate or deactivate
ZERO
ZERO is activated by factory settings.
ü
Supervisor - rights
1
> Setup > Measurement > ZERO and filter
2
If necessary change "ZERO mode". The factory setting is “I•ZERO 2.0”.
ð
If you select "OFF”, the ZERO button does not work.
3
Save .
ð
If ZERO is activated, start the function by pressing the ZERO button. See also
"ZERO button [ } 23]".
How do I switch the
ZERO function ON?
Briefly press the ZERO button on the control panel or the touchscreen .
How do I switch the
ZERO function OFF?
Press the ZERO button on the control panel for more than 2 seconds or on the
touchscreen .
Operation mode
“Vacuum”, effect on
ZERO
After pressing the ZERO button, the displayed background signal is dimmed as a
function of the current drift. Typically, the display limit falls in several steps. The size of
the current display limit is a dimension with which leakages can currently be
measured. When measuring, the current display limit should be at least one decade
below the expected measured value.