Hanna Instruments HI 504901 - Manual (Page 17)

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DIGITAL I/O OPTIONS SETTING
Digital input section
This section includes all the specific options that apply to the
digital input channel. This channel is intended for connec-
tion to a simple instrument without RS232 or RS485 port. For
such instruments, an alarm output like an electromechanical
relay or an open collector digital output can be connected to
the HI504901 interface to trigger the sending of an alarm
SMS message. The complete options list is:
• Instrument enable: it is possible to enable this feature if an
instrument is connected to the digital input simply by checking
on the check-box.
• Instrument name: in this filed a description related to the
instrument has to be inserted: for example “HI8711 - A” for
an HI8711 connected to the digital input. The maximum
length of this description is 20 characters.
• Information options: set the options related to the informa-
tion SMSs to be received upon phone call:
• Red LED status when the contact is closed (ON/OFF).
• Description of the digital input status when the contact is
closed (e.g. “ALARM!”). The maximum length of this de-
scription is 30 characters.
• Description of the digital input status when the contact is
open (e.g. ”OK”). The maximum length of this descrip-
tion is 30 characters.
• Alarm options: set the options related to the alarm SMSs:
• Enable alarm: the alarm SMSs sending can be enabled
or disabled.
• The alarm can be triggered upon the closing or opening
of a contact on digital output (default trigger event is
closed contact).
• Alarm description string (e.g. “ALARM #1!”). The maxi-
mum length of this description is 30 characters.
Digital output section
It is possible to enable (or disable) the control of the digital
output status connected to the HI504901 by checking the
proper check-box. Once enabled, it is possible to control the
digital output simply sending the SMS “CLOSEP<cellular
phone interface password>” to close the digital output con-
tact, and “OPENP<cellular phone interface password>” to
Note To enable one RS485 instrument, all the three previous options
(instrument name, baud rate and RS485 address) must be set.
• Messages options: to set the alarm message options, click
on the “Message Options” button. This feature depends
on the instrument previously selected and it is only avail-
able for HI504 and HI504910 devices (see also the “HI504
and HI504910 Message Options” section).
Note For HI700, HI710, HI23 or HI24 instruments series it is pos-
sible only to enable or disable the sending of the alarm SMS.
HI504 and HI504910 Message Options:
In this window it is possible to choose in which alarm condi-
tions for HI504 and HI504910 instruments an SMS will be
sent to the selected telephone number(s).
Available alarm conditions for HI504 are:
• Alarm for setpoint 1;
• Alarm for setpoint 2;
• Max relay ON time;
• Life check error;
• pH electrode broken;
• Reference electrode broken;
• Old pH probe;
• Dead pH probe;
• Calibration time-out;
• Temperature probe broken;
• Analog input;
• EEPROM corruption;
• Temperature level.
Available alarm conditions for HI504910 are:
• Life check error;
• pH electrode broken;
• Reference electrode broken;
• Old pH probe;
• Dead pH probe;
• Temperature probe broken;
• EEPROM corruption.
Please refer to the HI504 Instruction Manual or HI504910
Instruction Manual for a complete explanation of the above
alarm conditions.