Hanna Instruments HI 504903, Instruction Manual, Page: 25 / 31

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• green LED blinking & red LED on , battery test failed
and SMS sending enabled
• green LED on & red LED blinking , battery test failed
and SMS sending disabled
• green & red LEDs blinking , cellular error is active
• green & red LEDs on , EEPROM data corruption
DIGITAL OUTPUT STATUS LED
This yellow LED keeps indication about digital output contact
status (if software enabled).
•
LED off , digital output contact open
• LED on , digital output contact close
CELLULAR SIGNAL LEDs
These green LEDs keep indication about signal strength for
cellular phone module.
•
Cell signal #1 & Cell signal #2 LEDs off , no signal
or cellular error found or power failure status
• Cell signal #1 LED on & Cell signal #2 LED off ,
medium signal condition
• Cell signal #1 & Cell signal #2 LEDs on , strong
signal condition
CELLULAR STATUS LED
When available, this yellow LED displays the operating status
of the cellular phone terminal.
•
LED off , cellular engine off
• LED on , cellular engine on but not registered to the network
• LED blinking (slow) , cellular engine on and registered to
the network
• LED blinking (fast) , cellular engine registered to the net-
work and a call is in progress
LED INDICATORS
Find here below a brief explanation of all possible LEDs indi-
cations of
HI504903 interface.
RS485 PORT LED
This red LED keeps indication about devices connected to the
RS485 port.
•
LED off
• in idle state: no instrument is configured or no alarm is on
• during PC communication session: not yet channel selec-
tion made by remote PC
• LED on , in idle state: at least one instrument is configured
and at least one alarm is on
• LED blinking , during PC communication session: a com-
munication is in progress between remote PC and one (or
more) of RS485 instruments
DIGITAL INPUT PORT LED
This red LED keeps indication about digital input status (if soft-
ware enabled) depending on last interface configuration setting.
•
LED off
• in idle state: digital input not configured or digital contact
close (if configured to be on when contact is open) or
contact open (if configured to be on when contact is close)
• during PC communication session: when a call is in
progress with any instrument
• LED on , in idle state: digital input configured and close (if
configured to be on when contact is close) or contact open (if
configured to be on when contact is open)
SMS ENABLE/DISABLE LEDs
These two LEDs keep indication about SMS sending enable/
disable status and are used on fault interface related condition
to provide to the user a “visual” indication of actual problem.
•
green LED on & red LED off , in idle state: SMS sending
enabled
• green LED off & red LED on during interface start-up
procedure or in idle state if SMS sending is disabled
• green LED blinking & red LED off , in power failure
status: SMS sending enabled
• green LED off & red LED blinking , in power failure
status: SMS sending disabled