Measurement Procedure; Sample Preparation - Extech Instruments ExStik EC500 User Manual

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Measurement Procedure

Sample Preparation:

1. For Conductivity, TDS or Salinity place the test sample in a sample
cup with enough depth (2.5cm minimum) to cover the electrode. Stir
the solution to remove any air bubbles.
2. For pH, place the tip of the electrode in the sample or make contact
with a wet surface.
Measurement:
1. Press the ON button. (
display during the turn-on diagnostics)
2. Depress and hold the MODE/HOLD key to scroll to the desired
measurement mode.
3. Insert the electrode into the sample making sure that the electrodes are
completely submersed.
4. Slowly stir the solution with the electrode to remove air bubbles if in the
Conductivity, TDS or Salinity mode.
5. If in the Conductivity, TDS or Salinity modes, the meter will auto-range
to the proper range and then display the reading.
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