Ph Calibration - Thermo Scientific Star Series User Manual

pH Calibration

1 . Prepare the electrode for use according to the instructions received with the
electrode .
2 . In setup mode select the buffer set of NIST (
for the proper buffer recognition to occur, if not set previously .
3 . Press until the arrow icon is pointing to the pH measurement line .
4 . Press .
5 . Rinse the electrode and ATC probe and place into the buffer .
6 . Wait for the pH to stop flashing .
a . Auto-Buffer-Recognition – When the pH stops flashing the meter will display
the temperature-corrected pH value for the buffer .
b . Manual Calibration – When the pH stops flashing the meter will display the
actual buffer value read by the pH electrode . Use the
change the pH value to the temperature-corrected pH value for the buffer .
7 . Once the correct buffer value is shown on the meter display, press
proceed to the next calibration point and repeat steps 5 through 6 or press
to save the calibration .
8 . The slope will be displayed before the meter returns to the measurement mode .
is displayed in the lower field and the actual electrode slope, in percent, is
displayed in the main field .
a . On a 1 point calibration use the
press
b . On the 2 or more point calibration the meter will automatically go to the
measurement mode 2 seconds after display of
Thermo Scientific Orion Star
to return to the measurement mode .
Series Meter
™
) or DIN (
and / to edit the slope then
.
pH Technique
) being used
and / to
to
EN-27