Hanna Instruments HI 23 Series Instruction Manual page 44

EEPROM SELFTEST
RELAYS AND LEDS
Note
44
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 be-
fore exiting selftest procedure.
If not, the message "Stored data error - Press
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 EE-
PROM is switched on.
During EEPROM reset a blinking message
"Set" is shown on primary LCD; the sec-
ondary LCD displays "MEM".
At the end of this operation all the param-
eters 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.
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.
Relays and LEDs test has to be carried out with the relay
contacts disconnected from external plant devices.
to reset