wtw Multi 3410 Operating Manual page 56

Operation
QSC calibration
Carrying out a QSC
initial calibration
56
The QSC function is enabled by once carrying out an additional three-
point calibration with special QSC buffer solutions. It covers the entire
measuring range of the sensor. The QSC initial calibration determines
the actual condition of the sensor and stores it as a reference in the
sensor.
To meet the high requirements of a QSC initial calibration, the QSC ini-
tial calibration should optimally be carried out with the initial commis-
sioning of the sensor.
Carry out the normal calibrations for your special measuring range with
your usual standard solutions as previously done.
Note
As soon as the QSC function was enabled for an IDS sensor, it is not
possible to return to the sensor evaluation with the sensor symbol for
this sensor.
1 Open the menu for measurement settings with <MENU/
ENTER>.
2 In the QSC menu, select First calibration with < >< >.
The calibration display appears. AutoCal QSC-Kit is displayed
as the buffer.
Exclusively use the QSC-Kit for the QSC calibration. If you use
other buffers, you will have no valid QSC calibration.
22.09.2009 08:00
3 Calibration with the buffers of the QSC-Kit is done like a normal
three-point calibration.
Follow the user guide.
Note
Carry out the QSC initial calibration very carefully. It determines the ref-
erence value for the sensor. This reference value cannot be overwritten
or reset.
As soon as the QSC function was enabled, it is not possible to return to
the sensor evaluation with the sensor symbol.
Multi 3410
ba75863e02 12/2009