User Guide

Three-point Calibration

• Proceed as described above but do

not quit calibration by pressing CAL.

Note The meter will automatically skip the two buffers that were

used to prevent errors.

• After the second calibration point

is confirmed, immerse the pH elec-

trode and the Potential Matching Pin

into the third buffer solution (e.g.

pH 10.01) and stir gently.

Note The electrode should be submerged

approximately 4 cm (1½") in the so-

lution. The temperature probe should

be located as close as possible to the

pH electrode.

• Only when the reading is stable the

probe indicator " " will stop flash-

ing (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, the meter stores the reading, adjust-

ing the 2

slope point and the calibration process is ended

with the offset and the 1

and 2

slope of the meter cali-

brated.

If the reading is not close to the se-

lected buffer, "WRONG

BUF

" will

blink.

Note During calibration, the secondary LCD displays the selected

buffer value. By pressing LCD the temperature can be dis-

played. This will allow you to check the buffer temperature

during calibration.