Hanna Instruments HI 504903 User Manual

Page 15

RS485 OPTIONS SETTING

In this section it is possible to set all options related to the
RS485 communication channel towards the connected HI142
temperature dataloggers. All the loggers must be connected
to the same RS485 bus; the maximum number of instruments
that can be connected to the same HI504903 interface is 31.
To set the HI142 options, click on one of the 31 available
buttons and then set the following features:
• Instrument name: enable the communication between

HI504903 interface and HI142 temperature datalogger
connected to the RS485 channel by selecting “HI142” in
the window. To disable an instrument previously inserted,
select “NO INSTRUMENT”.

• Baud rate: once the instrument has been selected, the de-

fault baud rate value is automatically proposed. The only
baud rate available for HI142 loggers is 1200 bps.

• Serial number: it is the serial number of the HI142 logger

to be connected to HI504903 (allowed values are within
0 to 999999 range). This serial number will be used by
HI504903 as logger address to identify the instruments
connected to the RS485 channel. Each logger must have a
different value for this field.

Note

To enable one HI142 logger, all the three previous options
(instrument name, baud rate and serial number) must be set.
• Messages options: to choose in which alarm conditions an

SMS will be sent to the selected phone number(s), click on
the “Message Options” button. This window will be dis-
played only if “HI142” was selected on “Instrument name”
field. Available alarm conditions for HI142 are:

• Temperature out of range: to receive an alarm SMS when

temperature on HI142 logger exceed low or high tem-
perature limits.

• Low battery: to receive an alarm SMS when the level of the

logger internal battery is low; contact the nearest
Hanna Service Center.

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 provided with a digital output
port. For such instruments, an alarm output like an electro-

Security options:

• On “HI504903 Password” field it is possible to set the pass-

word for the HI504903 device. This password protects from
unauthorized remote modem connection to one of the instru-
ments connected to the cellular phone interface and from
unauthorized remote configuration. This password does not
block the local configuration of the instrument, i.e. no pass-
word is required to configure the HI504903 device with its
application software through the serial cable. The password
can be disabled. Valid values are string of 6 to 20 characters
(letters and numbers are allowed).

Note

Letters typed in lower case will be automatically changed in
upper case by the software. If the field is enabled, a value
must be inserted.

• On “PIN number” field the SIM card PIN number has to

be inserted (maximum 4 digits). When inserting this code
the characters are masked. Valid values are numbers from
0000 to 9999. The PIN code must be inserted only in the
first HI504903 configuration and every time the SIM card
PIN code is changed.

Note

The SIM card PIN number must be inserted in any case and
is required by the application software even if the PIN lock
has been disabled through a normal cellular phone.

Note

If an update with a wrong PIN code is made, an attempt for
cellular PIN insertion is lost. At start-up, 3 attempts for en-
tering the cellular PIN code are available, and at each up-
date with a wrong PIN value, an attempt will be lost. After 3
wrong attempts, to unlock the SIM card, extract it and manu-
ally enter the PUK by using a cellular phone.

Note

If the PIN code is changed during configuration it will be
checked and this operation lasts about 30 seconds (the cel-
lular phone will be turned off and on again to verify the PIN
code correctness).

Note

If the SIM card PIN number is longer than 4 digits, it has to
be changed before using it in the HI504903 interface. To
do this, insert the SIM card in a cellular phone and change
the old PIN number with a new one with value from 0000 to
9999, while paying attention to remember the new code (please
refer to the cellular phone instruction manual for the correct
procedure). After that, it is possible to insert the SIM card in
the HI504903 (see “Installation” section) and use the new
PIN number in the next interface local configuration.