User Guide

CALIBRATION WITH MANUAL TEMPERATURE COMPENSATION

• Enter the calibration procedure and press LCD to display

the temperature on the secondary LCD.

• Unplug any temperature probe that may

be attached to the meter. The "°C" sym-

bol will flash.

• Note the temperature of the buffer solutions with a

ChecktempC or an accurate thermometer with a resolution

of 0.1°C.

•Use  or  to manually adjust the display reading to the

value of the reference thermometer (e.g. 20°C).

• Follow the calibration procedure above.

Note To toggle between the pH buffer and

the temperature press LCD.

When a one-point calibration is carried out only the pH off-

set is computed and stored, while the pH slope is fixed

according to the theoretical values.

With a two-point calibration, offset and slope are computed

to fit the two calibration points. With a three-point calibra-

tion the offset and first slope values refers to pH 4.01 and

7.01 buffers, while the second slope refers to pH 7.01 and

10.01 buffers.

Note If the process meter has never been cali-

brated or an EEPROM reset has occurred,

the meter continues to perform measure-

ment. However, the user is informed of a pH calibration

requirement by a blinking “CAL” (see “Startup” section).

The device must be calibrated within the temperature range

of 0-95°C. Outside this range, the buffer pH values are not

reliable.