User Guide

• Remove the protective cap from the

pH electrode and immerse it into the

selected buffer solution (e.g. pH 7.01)

with the Potential Matching Pin and

temperature probe, then stir gently.

Note The electrode should be submerged ap-

proximately 4 cm (1½") in the solution.

The temperature probe should be located

as close as possible to the pH electrode.

Note When it is not possible to immerse the Potential Matching Pin

together with the pH electrode in the solution, disable the

differential input by connecting the Connection for Potential

Matching Pin (#9 page 7) with the Connection for Electrode

Reference (#8 on page 7) with a jumper wire.

• Only when the reading is stable the

probe indicator " " will stop flashing

(after about 30 seconds) and the

"CFM" indicator will start blinking.

• Press CFM to confirm the calibration; if the reading is close to

the selected buffer (±1.5 pH), the meter stores the reading

and the secondary LCD will display the expected second buffer

value. Offset and slope calculation is made at the end by

pressing CAL to exit.

If the reading is not close to the selected

buffer, "WRONG

BUF

" will blink.

• If CAL is pressed, the calibration pro-

cess ends by memorizing a new offset

value. The new offset value is stored

and a default value of 57.5 mV per

pH unit at 25°C is assigned as the

new slope value.

For best accuracy however, it is recommended that a two-

point calibration is performed.