Inficon Protec P3000, Translation Of The Original Operating Manual, Page: 57 / 128

Equipment Settings
57
Search level
An additional warning level can be entered as percentage of the trigger level. A
warning signal will be issued for leaks that are below the trigger level but above the
search level in order not to miss small leaks. The search level may be set to values
between 5 and 100%. Default value: 90%
4.3.2 Selecting a set of gas parameters
A set of gas parameters can be selected by setting the Mode in the Gas Edit menu
to “enabled”. Enabling a set of parameters will automatically disable all other three
sets of parameters so that only one set of parameters is used at the time.
4.4 Settings Sub-menu
In the settings sub-menu several settings which are important for the leak testing
procedure can be edited.
4.4.1 Vacuum & Access
In the Vacuum Access sub-menu setting monitoring functions like the
ZERO
function,
the flow limits and the contamination limit setting can be edited.
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 Protec
P3000 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
Contamination Limit
The Protec P3000 offers a protection mode against high helium concentrations
(contamination with helium).
This feature should be used to prevent the sensor from accelerated aging when
seeing large helium concentrations very frequently. The
CONTAMINATION LIMIT
can be
set to levels of
LOW
,
NORMAL AND HIGH
. The contamination limit function will track the
accumulated amount of helium sniffed over the last couple of seconds. If this accu-
mulated amount of helium exceeds the preset level (
LOW
,
NORMAL
,
HIGH
) the
message „contaminated“ will be displayed until the amount of helium in the system
has decreased again sufficiently. However, the lower the
CONTAMINATION LIMIT
setting
the smaller the largest possibly detected leak will be.
Notice
You should start with the
CONTAMINATION LIMIT
set to
LOW
. If you feel that
you get the „contaminated“ message too often, you may increase the
CONTAMINATION LIMIT
by one level at a time (to get the best usage out of
your Wise Technology Sensor).
Default: N
ORMAL