Conductivity Calibration - Thermo Scientific Orion Star Guide D'utilisation

Conductivity Technique

Conductivity Calibration

Note: For an automatic calibration, the nominal cell constant of the conductivity
probe must be entered in the setup menu before the calibration is performed. Refer
to Appendix A for the values of conductivity standards at different temperatures.
1 . In the measurement mode, press
line, press
begin the calibration .
2 . Rinse the probe with deionized water and place it into the conductivity standard .
3 . To perform a manual calibration – The manual calibration screen will display the
cell constant on the top line, the conductivity value of the calibration standard on
the middle line and
until the first digit to be changed is flashing, press
value of the flashing digit and continue to change the digits until:
a . If the conductivity temperature compensation is linear or non-linear (refer
to page EN-12 for conductivity temperature compensation), the displayed
conductivity value matches the value of the standard at the measured
temperature .
b . If the conductivity temperature compensation is off, the displayed
conductivity value matches the value of the standard at the conductivity
reference temperature .
Once the value is set, press
Press to save and end the calibration .
Note: In the manual calibration screen, start changing the cell constant within
five seconds or the meter will proceed to the automatic/direct calibration. If this
occurs, press and hold
4 . To perform an automatic or direct calibration – Wait for the meter to go from
the manual calibration screen to the automatic/direct calibration screen .
The automatic/direct calibration screen will display the conductivity value
of the calibration standard on the middle line and
EN-40
until the µS/cm or mS/cm icon is shown and press
on the bottom line . To change the cell constant, press
to abort the calibration and repeat the calibration.
Thermo Scientific Orion Star
until the arrow icon points to the middle
until the decimal point is in the correct location .
/ to change the
on the bottom line .
and Star Plus Meter User Guide
™
to