Extech Instruments EC500 Manual

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EC500-en-GB_v2.6 10/14

8888

Conductivity

TDS

Salinity

(ppm)

(mg/l)

mgL

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. ( and then “SELF CAL” will appear in the

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.

EC500