39
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” is shown on primary LCD;
the secondary LCD displays “MEM”.
At the end of this operation all the pa-
rameters are reset to their default
values. The calibrated cell constant is
also reset. For this reason the "CAL"
flag blinks until the EC/TDS calibra-
tion is performed.
RELAYS AND LEDS
Relays and LEDs selftests are executed as follows:
First all of the relays and LEDs are switched off, then they are
switched on one at a time for a few seconds and cyclically.
User can interrupt the otherwise endless cycle pressing any
key, as indicated by the scrolling message.
Note Relays and LEDs test has to be carried out with the relay
contacts disconnected from external plant devices.
