A help for control panel utilization/access.
Operating principle of the control panel
C
110
Access
to level 4 - Password
C
130
Setting
and
maintenance
part
presentation
of the control panel
Access
to
parameters
and
parameters
active depending on
authorization
C
120
Summary
of screens
Complete displays list with
access
way and
associated
sheet
C
140
Purpose
of the
external calibration
In
some instances,
it may be
convenient
to display a helium leak
value so that
matches
a desired target value (typically the value of an
external calibrated leak
connected
to the installation to
test
or at the
inlet port of the leak detector):
•
In hard
vacuum test
mode
When the
measurement
range is very different from the value of the
internal calibrated leak.
•
In sniffing
test
mode
When a specific calibration is required in the sniffing
test
mode to
certify that the
measurement
is valided and accurated.
•
In hard
vacuum
or sniffing
test
mode
When the leak
detector
is
connected
to an installation having its own
pumping
system
in operation and a small amount of the leak goes
into the leak detector.
The
external calibration allows to get a direct
readout of the
current
leak value.
When the helium signal
needs
to be displayed in a different unit for
convenience
or to calibrate the leak
detector
if the internal calibrated
leak is temporarily unavailable (manual auto-calibration selected).
The
external calibration is provided for the operator to easily obtain
a direct readout of the target value (or
current
external leak)
thanks
to
a correction factor automatically calculated and applied to the
digital
display of the leak detector.
Note : For the ASI 22, the
pressure measurement
kit is
necessary
to do
an external calibration ( A
700
)
.
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