Orion Star A222 and Star A322 Portable Conductivity Meters
4
Conductivity Calibration
One to five conductivity standards can be used for calibration. Always use fresh standards and select
standards that are near the sample conductivity. Prepare the conductivity cell according to the instructions in
the conductivity cell use guide. Connect the conductivity cell and any other electrodes to be used to the meter.
Power on the meter and set the measurement mode to conductivity.
Note:
For an automatic calibration, the nominal cell constant of the conductivity cell must be entered in the
setup menu before the calibration is performed and Thermo Scientific Orion 100 uS/cm, 1413 uS/cm and/or
12.9 mS/cm conductivity standards must be used.
Automatic and Direct Calibration
1. In the measurement mode, press
f1 (cal)
.
2. Rinse the conductivity cell and any other electrodes in use with distilled water, blot dry with a lint-free
tissue and place into the standard.
3. When the conductivity cell and standard are ready, press
f3 (start)
.
4. Wait for the conductivity value on the meter to stabilize and stop flashing and perform one of the
following actions:
a. Press
f2 (accept)
to accept the displayed conductivity value.
b. Press
f3 (edit)
to access the numeric entry screen and edit the conductivity standard value.
i. Press
,
,
or
to highlight a number or decimal point, press
f3 (enter)
to select
the highlighted item and repeat until the standard value at the measured temperature is shown.
ii. Press
f2 (done)
to exit the numeric entry screen.
iii. Press
f2 (accept)
to accept the entered conductivity value.
5. Press
f2 (next)
to proceed to the next standard and repeat steps 2 through 4 or press
f3 (cal done)
to
save and end the calibration. If five standards are used, the calibration will save and end once the fifth
conductivity standard value is accepted.
6. The meter will display the calibration summary including the average calculated cell constant. Press
f1 (meas)
to export the data to the calibration log or press
f2 (print)
to export the data to the calibration
log and a printer or computer. The meter will automatically proceed to the measurement mode.
