Ion Science SF6 P1:p - Manual (Page 20)

SF6 P1:p MANUAL Ion Science Ltd
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Setting up the operating parameters
[ NEW COMPONENT ] (or red TRIANGLE button).
Measurement data for several test specimens can be saved. The button [ NEW COMPONENT ] opens a
new blank test specimen dataset. For a maximum number of 96 test specimens 100 measurement data for
each can be saved. If the entry of a worker or test specimen identification has been made mandatory, the
entry of this data is queried automatically.
[ CLEAR DATA MEM. ] (or simultaneously SQUARE and TRIANGLE button).
This deletes all saved measured values. This function should be utilised before starting any new
measurement run so as to remove possibly present values which are no longer valid. Upon initialisation
through the screen, a safety query is displayed before erasing the data. Upon initiation through the
buttons on the handset, there will be no such query since inadvertent operation is not possible.
[ VIEW DATA ]
Viewing saved data on the screen. In the data area of the screen, the measured values may be scrolled
upwards and downwards using the arrow buttons. In the operator area information on the respective test
specimen dataset as well as the buttons for selecting the displayed test specimen dataset is available.
The technical level
(TECH LEVEL)
On the technical level, functions like running of the final calibration, operator-specific settings and reading of
technical data have been combined. From the main menu, the technical level is accessed through the button
[ OPEN TECH. LEVEL ] with subsequent password entry.
The functions which are available on this level are:
Final calibration
[ OPEN TECH. LEVEL ] / [ CALIBRATION ]
With the aid of the final calibration, the accuracy of the quantitative determination of leaks can be improved
compared to the system calibration.
In the course of the final calibration, the actual value of the calibration leak, respectively the concentration of
the calibration gas must be entered. If always the same calibration leak/calibration gas is used, this entry will
be required only once. The value is saved by the instrument and only needs to be confirmed by the operator
by pressing RETURN. Separate memory locations are available for the calibrated values for each operating
mode. Therefore, when changing between operating modes, the actual value will not have to be entered
once more.
When entering a new value, it may possibly required to convert the actual value stated on the calibration leak
to the unit of measurement used by the P1:p (E-7cc/s, E-8cc/s, ppm or gm/yr). After acknowledging the
entry, the actual calibration process is run. The instrument first determines the background level. For this the
sniffer probe must be placed in the air of the room which is free of SF
6
. The message “Calibrating clean air:”
and a time bar are displayed.
After the time on the time bar has elapsed, the operator is requested to guide the SmartSensor to the
calibration leak. The corresponding time bar will only start to run after this has been done. During the
measurement, the intake opening of the SmartSensor must be constantly held precisely at the opening of the
calibration leak. If this is not done, then there is the risk of producing a faulty calibration. The measurement
can be cancelled at any time through the [ E X I T ] button. Then the instrument returns to the Measuring
Mode, and the previous calibration remains unchanged. Use this possibility when wanting to enter the actual
value of your calibration leak/calibration gas but without wanting to run a calibration.
After the calibration has been completed, the operator is requested to remove the sensor from the calibration
leak. The new calibration factor is displayed. If the factor is outside the permissible range, then the leak
detector will assume an error during the calibration. Such errors may, for example, be due to removing the
sensor from the calibration leak during the process or missing agreement of the entered actual value with the
value of the calibration leak. In this case the new calibration factor is rejected and the initial calibration factor
is maintained. An acceptable new calibration factor is marked by a check mark and an unacceptable
calibration factor is marked by a warning triangle.