Thermo Electron Corporation
VII-4
Orion Star Series Meter
pH Technique
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
and
/
to
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
to
proceed to the next calibration point and repeat steps 5 through 7 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
and
/
to edit the slope then
press
to return to the measurement mode .
b . On the 2 or more point calibration the meter will automatically go to
measurement 2 seconds after display of
.
After calibration, the electrode and meter are ready to start taking sample
measurements . Make sure that the instrument is in measurement mode and
that the
pH
is lit . If the is not lit, press
to return to measurement mode .
If the
pH
is not lit, press
until the arrow on the left of the display is pointing
at the top line . Then press
until the
pH
lights . You are now ready to start
measuring .
The
man
display indicates manual pH calibration was
performed . The numbers on the top of the display indicate
which pH Auto buffers were used in the last calibration .
Содержание Orion Star
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