Measuring with EC Probes 134
22.4.2. Process Calibration
A process calibration is a single point calibration performed with the probe installed in the process. This type
of calibration allows the user to adjust the measured EC or Seawater salinity value so that it matches the value
determined with a calibrated reference meter.
Preparation
Use a reference instrument to determine the process EC or Salinity value and write down the value.
• Go to Channel Menu item, press Setup virtual key and select Probe Settings.
• Press Setup again and use the
ud keys to navigate to Meas.Mode item.
• If not configured, press Modify to set EC mode.
Procedure
1. Press CAL to enter calibration mode.
2. At prompt, with the password enabled, input the passcode.
3. Press Process when displayed to enter calibration.
4.
Press the ud directional keys to adjust the process value in agreement with the predetermined value.
5. When the reading is stable, CFM is displayed. Press CFM to save.
“Wait” is displayed followed by “DONE” when the process calibration is confirmed and saved.
Note: For process calibration, input reading must be greater than 0.1 μS/cm and Setpoint value should not
be lower than 0.065 μS/cm.
22.4.3. Salinity Calibration (HI7630‑48zz series only)
Salinity calibration can be performed with the controller set to Sal % measurement mode after the EC range
has been calibrated.
Procedure
1. Press CAL to enter calibration mode.
2. At prompt, with the password enabled, input the passcode.
3. Raise and lower conductivity cell in rinse beaker of salinity standard then discard.
4. Immerse the sensor in salinity standard. The controller automatically recognizes the standard. Allow the
reading to stabilize.
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