User Guide

than the holes of the EC/TDS probe

sleeve. Tap the EC/TDS probe re-

peatedly on the bottom of the beaker

and stir to ensure that no air bubbles

are trapped inside the sleeve.

• When the reading is stable, "CAL"

will stop flashing (after about 30 sec-

onds) and the "READY" and "CFM"

indicators will blink.

• Press CFM to confirm the calibra-

tion point; if the reading is close to

the selected solution, the meter

stores the reading.

If the reading is not close to the selected solution, "ERROR"

will blink.

Note A 2-point calibration is always suggested. However the EC/

TDS calibration can also be performed at 1 point. To cali-

brate offset only, just press CAL after confirmation (with CFM)

of the zero reading; the meter will return to normal opera-

tional mode. To have the cell constant calibrated first, press

the up or down arrow keys after entering the calibration pro-

cedure to skip to the next possible calibration buffer. In this

case, after confirmation of the cell constant, the meter will

ask for the offset calibration displaying zero on the LCD; press

CAL to exit or calibrate the offset, if desired.

Note The EC or TDS calibration value shown is referenced at 25°C

even if the reference temperature of 20°C has been selected.

Note During calibration, press LCD to display the cell constant

value on the primary display. Press LCD again to return to

calibration buffer visualization.

Note To interrupt the calibration procedure press SETUP to restart

the procedure, or CAL to exit to normal operational mode.

Note If the process meter has never been calibrated or an EE-

PROM reset has occurred, the meter continues to perform

measurements. However, the user is informed of an EC or

TDS calibration requirement by a blinking “CAL” indication

(see “Startup” section).

Note The device must be calibrated within the temperature range

specified for the EC or TDS buffer solution.