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Filling hole should
be uncovered
Fresh pH buffer
Stir all samples
and buffers
•
Flat surface ROSS pH electrodes may be used on any
moist surface or in liquids.
Electrode Calibration
General Calibration Procedure
For detailed instructions on pH calibration, manual pH calibration and
temperature compensation, consult your meter user guide. When
using ROSS electrodes with a V
V
s
pH/LogR meter user guide for instructions on temperature
ersa
tar
calibration and LogR temperature compensated pH measurements.
Note: If the meter is set to automatically recognize the pH buffer at the
measured temperature and an ATC probe is used, you do not need to
manually adjust the pH values of the buffers.
One Buffer Calibration
1. Choose a buffer near expected sample pH.
2. The buffer should be at same temperature as the sample. If the
buffer and samples are at varying temperatures, temperature
compensation is recommended.
3. Prepare the meter according to the meter user guide.
4. Rinse the electrode first with distilled water and then with the buffer
being used for calibration.
10
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ROSS Ultra, ROSS Ultra Triode and ROSS pH Electrodes
Measuring Hints
Using a Flat Surface Electrode
s
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Filling solution level
must be higher than
sample level
Reference junction
must be immersed
Place insulation
between stirrer
and beaker
pH/LogR meter, refer to the
tar
Thermo Scientific Orion
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