Inficon UL6000 Fab - Page 70

6 | Operation INFICON
70 / 152 UL6000-Fab,-PLUS-Operating-instructions-iinc75en1-01-(2206)
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 You can choose between "I•ZERO 2.0", "ZERO" and "Switched off".
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 [}25]".
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 .
“Vacuum" operation
mode, effect of ZERO
setting
If you use the "I•ZERO 2.0" setting, after pressing the ZERO button the displayed
background signal is faded out depending on 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.
If you use the "ZERO" setting, the currently displayed leak rate value is set to the
lower display limit after pressing the ZERO button.
"Vacuum" operation
mode, “HYDRO•S“
switched on, setting
"I•ZERO 2.0" or
“ZERO“
When you press the ZERO button, the current leak rate value is set to the lower
display limit.
Note: The ZERO button should not be pressed when there is a rapidly falling
background, otherwise, when compared to the background change, small leak rate
signals may be incorrectly hidden.