Hanna-instruments HI 9812-5N Manual de usuario descargar pdf (Pagina 10)

Accessories needed:

• Use HI 70031 (1413 µS/cm) EC calibration solution or

HI 70032 (1382 ppm) TDS calibration solution.

Note: The conversion between EC and TDS is made by a built-in

circuit, hence it is requested to calibrate the meter only in EC

or TDS range. The other range is thus automatically calibrated.

PROCEDURE

• Pour approximately 4 cm (1½") of a conductivity calibration

solution (e.g. HI 70031) into a beaker. If possible, use plastic

beaker to minimize any EMC interference.

• Immerse the probe in the solution.

• Wait for a couple of minutes for thermal equilibrium to be

reached.

• Tap the probe on the bottom, then shake it lightly while rotating

to make sure no air bubbles remain trapped inside the probe.

• Press the µS/cm (or ppm) key.

• Turn the EC/TDS calibration knob until

the display shows the EC or TDS reading

at 25°C.

EC/TDSEC/TDS

EC/TDS

CALIBRATION CALIBRATION

CALIBRATION

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Hanna-instruments HI 9812-5N Manual de usuario Pagina 10