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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.
If
is pressed the EEPROM selftest procedure terminates with no other action.
Otherwise, EEPROM is reset with default values from ROM as when a device with a
virgin EEPROM is switched on.
During EEPROM reset a blinking message “Set” is
shown on primary LCD; the secondary LCD displays
“MEM”.
At the end of this operation all the parameters are
reset to their default values. The calibrated cell
constant is also reset. For this reason the “CAL”
flag blinks until the EC/TDS calibration is performed.
