Thermo Scientific Orion 320, User Manual

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4-6 Thermo Scientific Orion 320, 350 and 370 PerpHecT
®
LogR
®
Meter User Guide
1 . Attach the pH electrode to the meter .
2 . Choose a pH 7 .00 buffer . Autocalibration with one buffer can only be
performed using pH buffer 7 .00 .
3 . Press the cal key to initiate calibration sequence . The display will show
CAL for two seconds . Press the scroll (
▲ ▼
) keys until 7 is displayed
and then press the yes key to accept the calibration range .
4 . Place the electrode in pH 7 .00 buffer . When the ready icon is shown,
indicating electrode stability, press the yes key .
5 . SLP will be displayed while 100 .0 (or the previous calibration slope
value) is displayed . This value can be edited using the scroll (
▲ ▼
)
keys . Press the yes key to save the slope value .
6 . The meter will automatically proceed to the measurement mode . The
ready icon will be shown to indicate electrode stability .
7 . If operating in the LogR mode or using an ATC probe, the
temperature-corrected pH reading will be displayed .
8 . Rinse the electrode with distilled water and place it into the sample .
Record the pH and temperature directly from the meter display when
the ready icon is displayed or when the electrode signal is stable .
One Point Autocalibration