User Guide

The colon is a useful indicator for the correct position of

squares.

Note A maximum of two keys may be pressed simultaneously to be

properly recognized.

To exit the keyboard test procedure press LCD, CAL and SETUP

simultaneously.

EEPROM SELFTEST

The EEPROM selftest procedure involves verifying the stored

EEPROM checksum. If the checksum is correct the “Stored

data good” message will be shown for a few seconds before

exiting selftest procedure.

If not, the message “Stored data error - Press  to reset

stored data or  to ignore”.

If  is pressed the EEPROM selftest procedure terminates

with no other action. Otherwise, EEPROM is reset with de-

fault values from ROM as when a device with a virgin

EEPROM is switched on.

During EEPROM reset a blinking mes-

sage “Set MEM” is shown on the LCD.

At the end of this operation all the pa-

rameters are reset to their default

values. Calibration data is also reset.

For this reason the "CAL" flag blinks

until the pH calibration is performed.