INFICON Protec P3000(XL) Helium Leak Detector - Manual (Page 49)

Operation of the Protec P3000
3-15
k
in
a
26
e Ch
ap
te
r
3
.fm
Tech
ni
ca
l Ha
nd
bo
ok
(1
20
9)
3.5 Calibration and Self-Test
The Protec P3000 can be calibrated internally with the built-in PRO-Check reference
leak or externally with an external calibrated leak (Cat. No. 122 37 - 122 39).
Notice If a calibration is started during the first 20 minutes after power on, a
warning will be issued.
Do not calibrate the Protec P3000 during the first 20 minutes after start-up.
Also a verification of the calibration may lead to wrong results in the first 20
minutes after start-up.
Only confirm and continue with the calibration if the real warm-up has been
longer than 20 min. (e.g. after a quick restart of the Protec P3000.)
The built-in PRO-Check reference leak can be used for a self-test of the Protec
P3000 as well as for internal calibration.
Notice The PRO-Check reference leak is a temperature compensated leak. It
must only be used when electrically connected to the main unit, either
when inserted into its port or when connected to the main unit via a Sub-D
extension cord. The leak rate printed onto the body of the PRO-Check is
only valid at 20°C (68F) and will vary greatly with temperature and time.
To compensate for this the PRO-Check reference leak is equippend with a
temperature sensor and a compensation curve is stored in the software
which automatically compensates the test leak rate for changes in
temperature when connected to the main unit.
A calibration or verification with the PRO-Check reference leak not being
connected to the main unit will cause a wrong calibration of the Protec
P3000 and / or will lead to wrong testing results.
3.5.1 Verifying a calibration (proof function)
Notice A verification can only be performed while the unit is in one of the two
measurement modes: standard operation mode or I•Guide operation
mode. A verification 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 a
verification of the calibration (proof function) will be started automatically. While
holding the sniffer tip in the test leak opening, the unit will check the reading from the
PRO-Check. Afterwards the operator will be requested to remove the sniffer tip from
the leak opening.
Notice Any time during the verification procedure an internal calibration may be
started by pressing either the right sniffer probe button or the CAL button
on the main display.
The results of the verification will be displayed in a summarizing screen. If the
verification process was successful, the message "sensitivity check OK" will be
displayed.