Conductivity Calibration; Conductivity Measurements - Extech Instruments EC210 User Manual

Conductivity Calibration
1. Connect the Conductivity electrode to the input socket at the bottom of the meter.
2. Switch the meter ON by pressing the POWER/ESC button.
3. Prepare a Conductivity Standard Solution (for example, 1.413uS).
4. Hold the probe by its handle and immerse the sensing electrode completely in the
standard solution. Shake/stir the sensing electrode to allow the electrode's internal air
bubbles to escape from the sensing electrode.
5. Press the HOLD button and the display will show the HOLD icon.
6. Press the REC button and the upper display area will show CAL and the lower display area
will show YES. To abort at this point, simply wait and the meter will revert to the normal
operating mode.
7. To continue, press the ENTER button and the display will show the Conductivity reading,
the measurement unit, and, shortly after, the flashing CAL icon. Note that the meter will
show END if the electrode does not detect an appropriate solution value.
8. While the CAL icon is flashing use the arrow buttons to adjust the displayed Conductivity
reading to match the Conductivity value of the solution.
9. After a few seconds the meter will display END. Calibration is complete.
Conductivity Measurements
Measurement Preparation
Before taking measurements, perform the calibration described above if necessary.
Taking Conductivity Measurements
1. Connect the electrode to the probe input socket.
2. Switch the meter ON by pressing the POWER/ESC button.
3. If the display does not show Conductivity units (uS or mS), press and hold the FUNCTION
button until the Conductivity units are displayed.
4. The lower display will indicate the temperature value.
5. The upper display shows the conductivity value.
6. Hold the electrode in hand and fully immerse the sensing head in the standard solution.
7. The upper display will show the conductivity value of the measured solution. The bottom
display will show the temperature value of the measured solution.
8. Rinse the probe with distilled water after each use.
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