133 Measuring with EC Probes
• Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.
•
To minimize cross‑contamination, when a two‑point calibration is required, use two beakers: one for rinsing
the probe and the other for calibration.
• Go to Probe Settings in Channel Setup and set Meas. Mode to EC.
Procedure
One‑Point
1. Press CAL to enter calibration mode.
2. At prompt, with the password enabled, input the passcode.
3. Suspend the probe in the air. Allow for the reading to stabilize.
4. Press CLR to delete a previous calibration, or Process to enter process calibration.
5. When the reading is stable and within the limits, CFM is displayed. Press CFM to save.
“Wait” is displayed at until the first calibration point (Offset calibration) is accepted and saved.
6. Press Next, to continue with a second point (or Exit to return to the menu).
Two‑Point
7. Raise and lower conductivity cell in rinse beaker of standard, then discard.
8.
Immerse the sensor in EC standard. The controller will automatically recognize the standard. Allow the
reading to stabilize.
9. Press CFM when displayed to confirm the second point and save the calibration.
“Wait” followed by the “Calibration DONE” confirmation screen notifies the user that the two‑point
calibration is complete. The controller returns to the menu.
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