Inficon Ecotec E3000, Technical Handbook

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4-12
Equipment Settings
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4.5 Settings Sub-menu
In the settings sub-menu several settings which are important for the leak testing
procedure can be edited.
4.5.1 Vacuum & Access Menu
In the
VACUUM
&
ACCESS
sub-menu setting monitoring functions like the
ZERO
function, the flow limits setting and the sensitivity check can be edited.
Zero
When pressing the
ZERO
button the
ZERO
function will be enabled or disabled.
When the
ZERO
function is enabled the currently detected background level of
refrigerant is set to
ZERO
and only increased levels of refrigerant are displayed.
The
ZERO
level is adjusted automatically on decreasing backgrounds.
If the use of the
ZERO
function is allowed, the leak rate which is currently being
displayed is saved as the "
ZERO
level” after having operated the
ZERO
button, i.e. the
lower display limit will be displayed (for example, 0.05 g/a).
Only values above this
ZERO
level are indicated so that resolution of the displayed
measurement signal is improved.
Notice: It is not possible to reduce the detection limit of the Ecotec E3000 by
pressing the
ZERO
button, only resolution is improved.
Should the background which has been suppressed using the
ZERO
button change,
the
ZERO
level is updated automatically. This avoids a condition were a leak is not
detected because the
ZERO
level mode has been activated.
The
ZERO
function may be controlled by the left sniffer button and / or the
ZERO
button
on the main display. The
ZERO
function may be enabled or disabled for both buttons
separately.
Zero time
The
ZERO
function is automatically updated when the background decreases so that
negative values will never be displayed, thus avoiding unintended missing of leaks.
The
ZERO TIME
is the time the leak rate has to be negative in order for the Ecotec
E3000 to update the background level.
The
ZERO TIME
can be set to values between 1.0 and 9.9 s.
Default value: 5.0 s
Default value:
Sniffer probe:
enabled
Main unit: enabled