Measuring with pH & ORP Probes 122
Note: One-point calibration evaluates electrode offset whereas a two- or three--point calibration evaluates
both electrode offset and slope.
If Next is selected, to continue with a two- or three-point calibration, the buffer value proposed next is
displayed flashing, until the probe is immersed in the selected buffer solution. User can select from any
of the buffer solutions not yet used for calibration.
pH Process Calibration
Prior to performing a process calibration, use a calibrated portable pH meter and probe to determine the pH of
the process and write down the value.
pH process calibration is a single point calibration, performed while the probe remains installed in the process.
Users can adjust the measured process pH value (± 0.5 pH) so that it matches the value determined with the
reference instrument.
1. Press CAL, to enter calibration mode.
2. At prompt, enter the passcode.
3. Once unlocked, press CAL again.
4. Press Process, to enter process calibration.
5. Use the ud keys to adjust the value to the one determined with the hand held meter.
6. When the reading is stable, CFM is available. Press CFM to save the calibration.
“Wait” is displayed at the bottom of the LCD screen until the calibration point is memorized.
“DONE” confirmation message is displayed for a few seconds.
Note: Process calibration evaluates electrode offset.
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