Ph Calibration - Thermo Scientific Orion Star Mode D'emploi

pH Technique

pH Calibration

1 . Prepare the electrode according to the electrode user guide .
2 . In the setup mode, select the buffer set (
the automatic buffer recognition feature .
3 . In the measurement mode, press
until the pH icon is shown and press
press
4 . Rinse the electrode, and ATC probe if being used, with distilled water and place
into the buffer .
5 . Wait for the pH icon to stop flashing .
a . Automatic buffer recognition – When the pH icon stops flashing the meter
will display the temperature-corrected pH value for the buffer .
b . Manual calibration – When the pH icon stops flashing the meter will display
the actual pH value read by the electrode . Press
to be changed is flashing, press
flashing digit and continue to change the digits until the meter displays the
temperature-corrected pH value of the buffer . Once the pH buffer value is
set, press
6 . Press to proceed to the next calibration point and repeat steps 4 and 5
or press
7 . The actual electrode slope, in percent, will be displayed in the main field and
will be displayed in the lower field .
a . For a one point calibration, press
press
b . For a two or more point calibration, the meter will automatically proceed to
the measurement mode after the slope is displayed .
EN-20
until the decimal point is in the correct location .
to save and end the calibration .
to return to the measurement mode .
Thermo Scientific Orion Star
or
until the arrow icon points to the top line,
to begin the calibration .
/ to change the value of the
and /
and Star Plus Series Meter User Guide
™
) that will be used for
until the first digit
to edit the slope and