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Note: Perform a calibration if:
the electrode has been replaced.
no calibration has been carried out for a long time.
the device has been used often and for a long time.
a particularly high measurement accuracy is required.
4.2.1 EC calibration
1.
Press “EC/pH” to choose “EC” mode. Immerse EC electrode
into 12880us/cm standard buffer solution, and stir lightly.
2.
Adjust “EC” button until it shows 12880us/cm when the showing
value is stable, . Wash electrode in distilled water and dry it well.
3.
Immerse the electrode into 1413us/cm standard solution. If the
reading is within the allowed error range , calibration is finished.
NOTE:
1.
Stir electrode while testing, to avoid the bubbles occurs on the
surface of electrode. Bubbles on the electrode have bad effect
on the accuracy of value.
2.
If the error value is large or EC value not go back to 0 us/cm.
Immerse the electrode into ethyl alcohol and stir for 5 to10
seconds.
