Owner manual

Calibrate the instrument frequently, especially if high accuracy is

required. For best results and constant display of electrode condition

and electrode response on the bar graph gauges, daily calibration is

recommended.

The instrument should be re-calibrated:

• Whenever the pH electrode is replaced.

• At least once a day.

• After testing aggressive chemicals.

• If high accuracy is required.

• If “CAL DUE” message is displayed during measurement.

Every time you calibrate the instrument use fresh buffers and perform an

electrode cleaning procedure (see page 33).

PREPARATIONPREPARATION

PREPARATION

Pour small quantities of the buffer solutions into clean beakers. If possible,

use plastic or glass beakers to minimize any EMC interferences.

For accurate calibration and to minimize cross-contamination, use two

beakers for each buffer solution. One for rinsing the electrode and one for

calibration.

PROCEDUREPROCEDURE

PROCEDURE

A two-point calibration is recommended, however a one-point calibration

will be permitted. Calibration can be performed using the seven

memorized buffers:

• pH 1.68, 3.00, 6.86, 7.01, 9.18, 10.01 and 12.45.

H CALIBRATIONH CALIBRATION

H CALIBRATION