INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 51)

Operation of the Protec P3000
3-17
k
in
a
26
e Ch
ap
te
r
3
.fm
Tech
ni
ca
l Ha
nd
bo
ok
(1
20
9)
3.5.2 Internal calibration
Notice A calibration can only be performed while the unit is in one of the two
measurement modes: standard operation mode or I•Guide operation
mode. A calibration will not be started if the main menu is opened.
If the sniffer tip is inserted into the opening of the PRO-Check reference leak with the
right probe button pressed while in measurement mode a calibration will be started
automatically. While holding the sniffer tip in the test leak opening, the Protec P3000
will measure the test leak. Afterwards the operator will be requested to remove the
sniffer tip from the leak opening.
After completion of the internal calibration a screen summarizing the results of the
calibration will be displayed. The old calibration factor as well as the new calibration
factor will be displayed. If warnings are active and have been acknowledged during
the calibration process, the message is endorsed with the information "with active
warnings".
To avoid unintended overwriting of a previous external (more accurate) calibration,
the operator needs to “Accept new values (anyway)?”.
3.5.3 External calibration
For external calibration it is recommended to use leak rates > 5x10
-6
mbar l/s for
Protec P3000 and leak rates of > 5x10
-5
mbar l/s when calibrating the Protec
P3000XL at HIGH FLOW (3000 sccm).
If the reference leak rate is < 5x10
-5
mbar l/s the Protec P3000XL automatically
calibrates in LOW FLOW mode.
Notice If significantly increased backgrounds are prevalent in your production
environment, larger leak rates for the calibration leak may be required.
The external calibration is a semi-automatic process during which the user will have
to follow some instructions. The calibration process may be started via the “
CAL ” -
button from the measuring mode at any time (except when the menu is open or the
function has been locked). A running calibration process may be cancelled by
operating the “
ESC ” button.
Fig. 3-18 Results of internal calibration