Hanna Instruments HI 504901 User Manual
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When all alarms are active, the message will include the
entire list as following: “pHsensor; ECsensor; pHrange;
ECrange; Dirty Filt1; Dirty Filt2; Fert1; Fert2; Fert3; Fert4;
Acid; Mixing”.
Alarms for HI23, HI24, HI700 and HI710 meters
Coded notation for
“HI24”, “HI700” or “HI710” (depending on meter model). For
these models there is only one possible alarm notification (if an
error occurred): “Alarm on” if the alarm is active.
Note
The alarm condition includes also the case of broken tem-
perature probe.
Alarms for HI504 meters
Coded notation for
while coded notations for active alarms are:
• “Setpoint1”: alarm for setpoint 1.
• “Setpoint2”: alarm for setpoint 2.
• “Max relay on”: maximum relay ON time error.
• “Life check”: life check error.
• “pH electrode broken”: pH electrode broken or leakage.
• “Reference electrode broken”: reference electrode broken
or leakage.
• “Old pH probe”: old pH probe error.
• “Dead pH probe”: dead pH probe error.
• “Calibration timeout”: calibration time-out error.
• “Temperature broken probe”: temperature probe broken
error.
• “Analog input”: analog input error.
• “EEPROM corruption”: EEPROM corruption error.
• “Temperature level”: temperature level error.
When all alarms are active, the message will include the
entire list as following: “Setpoint1; Setpoint2; Max relay on;
Life check; pH electrode broken; Reference electrode bro-
ken; Old pH probe; Dead pH probe; Calibration timeout;
Temperature broken probe; Analog input; EEPROM corrup-
tion; Temperature level”.
Note
If during last polling test HI504901 was not able to com-
municate with one of the instruments connected to the inter-
face, then a specific alarm SMS will be sent. This happens if
the cable between HI504901 and the instrument is not cor-
rectly connected, the remote instrument was turned off, or
only active alarms; when all active alarms can not be sent
within one SMS (the maximum number of characters for an
SMS is 160), more than one message will be sent, each one
having as header the label “Alarms#p/#t:” with the indication
of the progressive alarm SMS number (#p) and the total num-
ber of alarm SMSs (#t) that are going to be sent for the
instrument.
The
dent to the instrument model with active alarm(s).
The
(max. 4 digits) indicating the number of remaining messages in
the SIM card (see “Interface configuration” section).
Following a complete list of all available alarm indications (and
their coded notations) for all devices which can communicate
with HI504901 supervisor and some messages specific to
HI504901 interface itself.
Alarms for HI8001 and HI8002 controllers
Coded notation for
or “HI8002” (depending on controller model), while coded
notations for active alarms are:
• “pHsensor”: this alarm is triggered if the difference be-
tween the real time values of the two primary pH sensors
exceed the specified maximum allowable difference.
• “ECsensor”: this alarm is triggered if the difference be-
tween the real time values of the two primary EC sensors
exceed the specified maximum allowable difference.
• “pHrange”: this alarm is triggered when the real time value
of the primary pH sensor is outside a dead band set by the
user during instrument setup.
• “ECrange”: this alarm is triggered when the real time value
of the primary EC sensor is outside a dead band set by the
user during instrument setup.
• “Dirty Filtn”: this alarm indicates that the “n” filter requires
cleaning.
• “Fertn”: this alarm is triggered if the fertilizer level of the
“n” tank reached a minimum value.
• “Acid”: this alarm is triggered if the level of the acid (or
alkaline) tank reached a minimum value.
• “Mixing”: this alarm is triggered due to an incoming water
supply failure event.