Thermo Scientific Orion Versa Star VSTAR-PH, Справочное руководство

Страница: 13 / 40

9
Thermo Scientific Orion V
ersa
s
tar
pH with LogR Temperature Module
Chapter 4 pH, RmV and ORP Calibration
pH Calibration
Up to six pH buffers can be used for calibration. This can be a combination of automatically-recognized USA/NIST or
DIN buffer values and custom buffers. Always use fresh pH buffers and select buffers that bracket the sample pH and
are at least one pH unit apart. Prepare the pH electrode according to the instructions in the electrode user guide.
1. Press f1 (Cal) to perform a pH calibration.
2. Follow screen prompts for calibration. Use fresh buffers, rinse electrode with DI water before each
reading, blot with a lint free tissue.
3. USA and DIN buffer sets are automatically recognized based off the selection in the setup menu,
and the meter allows custom buffers to be used for up to 6 calibration points. Custom buffer option
prompts for the nominal values and stores data.
4. During calibration, points can be edited or retested prior to acceptance.
5. Information for the last calibration can be displayed on the main measurement screen. Refer to this
reference guide, Chapter 2 Module Overview, Display Information section for more information.
RmV Calibration
One standard can be used for relative mV calibration. Always use fresh standard. Prepare the electrode according to
the instructions in the electrode user guide.
1. Press f1 (Cal) to enter calibration mode.
2. Follow the screen prompts for calibration.
3. The calibration can be saved or printed when complete.
4. Information for the last calibration can be displayed on the main measurement screen. Refer to this
reference guide, Chapter 2 Module Overview, Display Information section for more information.