Calibration 14
7. CALIBRATION
Operation
1. Press
z key to enter calibration mode.
2. Press a / v key to toggle between pH and EC modes.
3. Press
e key to start calibration and w key to exit calibration.
7.1. pH
Calibrate the probe frequently for improved accuracy. Additionally, calibrate the probe:
• before installation
• whenever the probe is replaced
• after periodic maintenance
Always use fresh calibration buffers and perform electrode maintenance prior to calibration (see “Maintenance
& Care” section).
Preparation
Pour the buffer solution into clean beakers. If possible, use plastic beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross‑contamination, use two beakers, one for rinsing the probe and
one for calibration.
Remove the pH electrode protective cap.
Place both electrodes in pH calibration buffers to have read values temperature compensated correctly.
Procedure
One‑ or two‑point calibration can be performed using one of the two standard buffer solutions: 7.01 or 10.01 pH.
When a two‑point calibration is required, use 7.01 pH buffer as first calibration point.
One-Point Calibration
1. Press z key to enter calibration mode. Selected calibration mode is displayed blinking.
PH
EC
2. Press e key to start. “7.01 pH USE” is displayed as calibration point.
7.01
U S E
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