User Guide

EC/TDS/MEC/TDS/M

EC/TDS/M

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CALIBRATION CALIBRATION

CALIBRATION

Calibration is a 1-point procedure. Selectable calibration points are:

0.0, 84.0µS, 1413µS, 5.00mS, 12.88mS, 80.0mS,111.8mS.

To enter EC calibration select the EC range and press

the CAL key.

Note: TDS reading is automatically derived from the EC reading and

no specific calibration for TDS is needed. Pressing CAL while

TDS range is selected has no effect.

Rinse the probe with some of the calibration solution or

deionized water. Immerse the probe into the solution.

The sleeve holes must be completely submerged. Tap

the probe repeatedly to remove any air bubbles that

may be trapped inside the sleeve.

For zero calibration, just leave the dry probe in air.

The indications "BUF" and "CAL" are dis-

played. The upper LCD shows the uncalibrated

EC reading. The lower LCD shows the buffer

value. The stability indicator "

" blinks.

Select the desired value with the V

and W keys, if necessary.

When the " " symbol stops blinking, the

reading is stable. The "CON" indication starts

blinking on the LCD asking for confirmation.

Press ALT + CFM to confirm the calibra-

tion.

If everything is satisfactory, the meter displays the "Stor Good" mes-

sage and returns to measurement mode.

Notes

I If the uncalibrated reading is too far from the expected value,

calibration is not recognized. The "CON" indication does not

appear; the " " and "BUF" symbols blink to signal wrong or

contaminated calibration solution.

II For best results choose an EC buffer value close to the sample

to be measured.