Extech EC500 pH measurement equipment 0 - 14 pH EC500 User Manual

EC500-EU V2.2   8/05 

5 

8888

Conductivity

TDS

Salinity

PH

pH

(ppm)

(mg/l)

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. 

 

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.