Purpose
of the
internal calibration
Check that the leak
detector
is correctly adjusted to detect the carrier
gas
selected
and to display a correct leak value.
To
calibrate the leak detector, a calibrated leak is
used
as a reference:
the leak
detector
is equipped with an internal helium calibrated leak
with
reservoir
and
temperature compensation
sensor.
The internal calibration could
be:
- fully
automatic
if
the operator uses the calibrated
leak in
the
d
e
t
e
c
to
r
,
-
semi-automatic
if
the operator uses
an
external calibrated
leak.
When should
an
internal calibration
be
per
for
med?
•
When starting the leak
detector
in order to make
sure
that it is in
proper operating condition.
•
For high
sensitivity test
and optimized
measurement
accuracy: it is
advised to let the internal
temperature
of the leak
detector
stabilize for
about 30 min after
start-up
and then start a calibration.
•
If in doubt regarding the proper operation of the leak detector
(capability to properly detect a helium leakage). At any time, an
internal calibration may be started.
•
In case of
intensive
and
continuous
use: start an internal calibration
at the begining of each shift (8
hours
of operation).
Internal
calibrated
leak
The
internal calibrated leak is specifically designed to fit the present
leak detector. It is
composed
of:
•
a helium reservoir,
•
a
temperature sensor (used
to take into account the effect of
temperature
on the leak rate),
•
a built in
membrane
(to calibrate the helium leak rate),
•
a special quick
connection
device,
•
an identification label (similar to the identification label of an
external calibrated leak).
It is delivered with a calibration certificate.
Calibrated leak location
F
700
Recalibration
It is
recommended
to have each calibrated leak recalibrated at regular
intervals
to validate its value.
Accessories
A
700
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