Hanna Instruments HI 504903 User Manual

HI 504903

GSM Supervisor

Instruction Manual

IMEI number.
Stick here the IMEI number label or write it down for your future reference.

________________________________________________________________

TABLE OF CONTENTS

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . 6

GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 6

MAIN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . 8

MECHANICAL DIMENSIONS . . . . . . . . . . . . . . . . . . 9

TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . 10

SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . 11

MAINTENANCE & SAFETY TIPS . . . . . . . . . . . . . . . 11

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

RS232 Auxiliary Port . . . . . . . . . . . . . . . . . . . . . . . 12

Digital Input (DIG IN) . . . . . . . . . . . . . . . . . . . . . 12

Disable SMS (DISABLE) . . . . . . . . . . . . . . . . . . . . . 13

Digital Output (DIG OUT) . . . . . . . . . . . . . . . . . . 13

RS485 Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . 13

Power Supply Input. . . . . . . . . . . . . . . . . . . . . . . . 15

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SIM Card Insertion . . . . . . . . . . . . . . . . . . . . . . . . 16

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

IDLE MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

INTERFACE CONFIGURATION. . . . . . . . . . . . . . . . 21

Application Software Installation. . . . . . . . . . . . . . . 21

Starting Configuration . . . . . . . . . . . . . . . . . . . . . 21

Local Configuration . . . . . . . . . . . . . . . . . . . . . . . 22

Remote Configuration. . . . . . . . . . . . . . . . . . . . . . 22

CONFIGURATION SETTINGS. . . . . . . . . . . . . . . . . 24

General Options Settings . . . . . . . . . . . . . . . . . . . 25

RS485 Options Setting . . . . . . . . . . . . . . . . . . . . . 29

Digital I/O Options Setting . . . . . . . . . . . . . . . . . . 29

SMS DELIVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Alarm SMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Information SMS . . . . . . . . . . . . . . . . . . . . . . . . . 35

Digital Output Control . . . . . . . . . . . . . . . . . . . . . 39

PC COMMUNICATION . . . . . . . . . . . . . . . . . . . . . 40

Local Communication . . . . . . . . . . . . . . . . . . . . . 40

Remote Communication . . . . . . . . . . . . . . . . . . . . 41

PC Communication Protocol . . . . . . . . . . . . . . . . . 42

LED’s Status during PC Communication Session . . . 44

POWER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . 45

FAULT CONDITIONS AND SELFTEST PROCEDURES . . 46

LED INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . 48

ERRORS PRIORITY . . . . . . . . . . . . . . . . . . . . . . . . . 50

TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . 51

Interface Configuration . . . . . . . . . . . . . . . . . . . . . 51

PC Communication . . . . . . . . . . . . . . . . . . . . . . . 52

SMS Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

CE DECLARATION OF CONFORMITY. . . . . . . . . . . 58

WARRANTY

Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully before using the

instrument. It will provide you with the necessary information
for correct use of the instrument, as well as a precise idea of
its versatility.

If you need additional technical information, do not hesitate
to e-mail us at [e-mail].

This instrument is in compliance with the

directives.

The HI504903 interface is warranted for two years
against defects in workmanship and materials when used for
their intended purpose and maintained according to instruc­tions. This warranty is limited to repair or replacement free of
charge.

Damage due to accidents, misuse, tampering or lack of pre­scribed maintenance are not covered.

If service is required, contact the dealer from whom you pur­chased the instrument. If under warranty, report the model
number, date of purchase, serial number and the nature of
the failure. If the repair is not covered by the warranty, you
will be notified of the charges incurred. If the instrument is to
be returned to Hanna Instruments, first obtain a Returned
Goods Authorization number from the Customer Service de­partment and then send it with shipping costs prepaid. When
shipping any instrument, make sure it is properly packaged
for complete protection.

© 2004 Hanna Instruments

All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner.

Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance
notice.

5

PRELIMINARY EXAMINATION

MAIN FEATURES

Remove the instrument from the packing material and exam­ine it carefully to make sure that no damage has occurred
during shipping. If there is any noticeable damage, notify
your Dealer or the nearest Hanna Customer Service Center
immediately.

Note Save all packing materials until you are sure that the instru-

ment functions correctly. Any damaged or defective items must
be returned in their original packing materials together with
the supplied accessories.

GENERAL DESCRIPTION

HI504903 instrument is an intelligent interface between
HI142 temperature dataloggers connected through RS485

port and an industrial GSM cellular phone for sending SMS
messages or connecting through a local or a remote com­puter with HI92140 Hanna application software.

HI504903 can acquire from HI142 information about ac-
tive alarms, errors, current status and real time temperature
values on datalogger.

HI504903 device is also provided with one digital input
(typically an alarm relay) from “non-intelligent” instruments,
with only an alarm relay contact or another digital output
signal. HI504903 can be configured for all its parameters
and features through the HI504903SW Windows
patible application software provided with the instrument.

Two models are available:

• HI504903-1: Dual-band 900/1900 MHz GSM

• HI504903-2: Dual-band 900/1800 MHz GSM

®

com-

Power supply: 12VDC to 115VAC
power adapter (HI710005)

Power supply: 12VDC to 230VAC
power adapter (HI710006)

Here below are listed the main features of the HI504903
interface:

• GSM phone inside for Short Messaging Service (SMS) send­ing.

• Possibility of a wireless remote interface configuration or
connection to a computer workstation (equipped with a
modem) through the cellular phone inside.

• RS232 auxiliary port (PC config) for configuration or con­nection purpose with a local computer connected through
HI920010 cable.

• RS485 port, allowing connection of up to 31 HI142 tem­perature dataloggers on the same wire.

• Digital input port (typically connected to an alarm relay) to
acquire information from “non-intelligent” instruments.

• Digital output port, for which it is possible to change the
status (open/closed) through an appropriate SMS sent to
the interface.

• SMS enabling/disabling option through a dedicated port.

• LED indicators: two red LED’s are provided for signaling
error conditions or active alarms in the devices connected
to the interface through RS485 port or digital input, de­pending on interface configuration; one green LED and
one red LED are provided to give indication about SMS
sending enable current status; two green LED’s indicate
the cellular phone signal quality; one yellow LED is dedi­cated to the current status of digital output contact, and
another yellow LED to the operating status of the cellular
phone terminal.

• Real time clock.

• Diagnostic features.

• Internal backup battery which provides power supply in
case of mains power failure.

76

FUNCTIONAL DESCRIPTION

1. RS485 serial port red LED.

2. Digital input port red LED.

3. SMS enable green LED.

4. SMS disable red LED.

5. Digital output yellow LED.

6. Cellular signal strength green LED’s.

7. Cellular operating status yellow LED.

MECHANICAL DIMENSIONS

1. Backup battery (rechargeable, sealed lead-acid,
12V / 0.8Ah).

2. On board battery connector.

3. GSM module.

4. LED indicators (see figure on next page).

5. RS232 auxiliary communication port
(for local PC communication only).

6. Terminals not used for this model.

7. Terminals not used for this model.

8. Digital input terminal to acquire external information.

9. Digital input terminal to disable SMS sending.

10. Digital output terminal.

11. RS485 serial communications terminal.

12. Power supply input (12 VDC).

13. Fuse (1 A).

14. Power ON/OFF switch.

Unplug the meter before any electrical connection.

98

TECHNICAL DATA

Max output power 2 W for EGSM900; 1 W for GSM1800/1900

SIM interface 3V type SIM card

Antenna Dual-band antenna (900/1800/1900 MHz)

RS485 channel towards instruments

Digital input channel Supporting mechanical relays or open-collector outputs

Digital output channel Open collector output, 5 mA / 30V max.

RS232 auxiliary port towards PC

Installation Category I

Power Supply 12 VDC adapter & internal rechargeable battery

Power Consumption 6 VA max.

Environment 0 to 50 ºC; max. 85% RH non-condensing

For connection of up to 31 HI142 temperature
dataloggers on the same wire; baud rate fixed to
1200 bps (limited by the HI142 dataloggers)

D-Sub female connector, baud rate up to 9600

(12V / 0.8 Ah) for backing up

SAFETY INFORMATION

Radio devices have limitations in the vicinity of electronic
devices.

• Unplug and turn off the unit in hospitals or near medical
devices like pacemakers or hearing aids. The module may
interfere with the operation of these devices.

• Unplug and turn off the unit when flying. Secure is so that
it can not be powered inadvertently.

• Unplug and turn off the unit near petrol stations, fuel
depots, chemical plants or blasting operations. The mod­ule can disturb the operation of technical equipment.

• Interference can occur if the device is used near televi­sions, radios or PCs.

In order to avoid possible damage, it is recommended to
use only the Hanna Instruments accessories. They have been
tested and shown to work well with this device. However,
accessories are not covered by the warranty.

Enclosure ABS case, IP54

Dimensions 240 x 200 x 98 mm (9.4 x 7.9 x 3.9”)

MAINTENANCE & SAFETY TIPS

• SIM card: do not bend or scratch the SIM card or expose
it to static electricity.

• Wipe the module housing with a moist or antistatic cloth.
Do not use a chemical cleaning agent.

• Do not expose the GSM module to any extreme environ­ment where the temperature or humidity is high.

• Do not attempt to disassemble the unit. There are no user
serviceable parts inside.

1110

INSTALLATION

RS232 AUXILIARY PORT

Note Use this RS232 auxiliary port only for local configuration of

Note If the HI920010 Hanna cable is too short for your applica-

DIGITAL INPUT (DIG IN)

Note Never connect mains or AC voltage supply directly to the

Note The digital input is optoisolated.

HI504903 is provided with an auxiliary RS232 port (D-Sub
9-pole female plug) for connection to a local PC using an
HI920010 Hanna cable.

the interface with HI504903SW software or local communi­cation session with an instrument connected to the HI504903
interface (see “Interface Configuration” and “PC Communi­cation” sections for details).

tion, please refer to “Appendix, section 3” for details about
making a longer communication cable.

HI504903 is provided with a digital input, which can be
configured with HI504903SW software (see “Interface Con­figuration” section) to send an alarm SMS when a DC voltage
from 5 to 30 V is applied or when it is disconnected.
This input can come from a relay contact or from an open
collector output (for example from a PLC).
Connect the positive pole of an external power supply to the
positive DIG-IN terminal; connect a command relay between
the negative pole of the external power supply and the nega­tive DIG-IN (see also below diagram).

DIG-IN terminal.

DISABLE SMS (DISABLE)

This input works as a digital input (see previous subsection)
and allows to ignore active errors and suspend SMS sending
during operations as start-up, maintenance, etc.

DIGITAL OUTPUT (DIG OUT)

This optoisolated terminal is an open collector output, which
can be used for external signaling through LED indicators or
small relays (see below diagram).

RS485 SERIAL PORT

HI504903 is also provided with a 2-pin RS485 terminal for

communication with Hanna HI142 temperature dataloggers.
The RS485 standard is a digital transmission method that

allows long line connections. Its current loop system makes
this standard suitable for data transmission in noisy environ­ments.

Specifications:

The RS485 standard is implemented in HI504903 interface
with the following characteristic:

Data rate: fixed to 1200 bps for communication with

HI142 temperature dataloggers
Communication: bidirectional Half-Duplex
Line length: up to 1.2 Km typical, with 24 AWG cable
Loads: up to 32 typical
Internal termination: none

Connections:

The RS485 port of HI504903 can connect up to 31 HI142
dataloggers on the same physical network, with a total line
length up to 1.2 Km using a 24 AWG cable.

For connecting the first HI142 to the supervi­sor, use a cable made as shown in the
“Appendix, section 1” and connect the A and
B wires to the A and B pins of the HI504903
RS485 terminal.

1312

To connect the subsequent dataloggers one to the other, use
a cable with RJ11 plugs, made as explained in the “Appen­dix, section 2”.
To terminate the line, plug on the last HI142 the termination
key supplied with the HI504903 supervisor.

All the instruments connected to the RS485 port are “slave”
devices that are queried by the HI504903 supervisor. In
other words, the interface can work only as a “master” com­ponent, whereas the connected instruments work as remote
terminal equipments answering to the commands only.
Each HI142 instrument is identified by an unique address
number, included in the 000001 to 999999 interval, which
corresponds to the Serial Number of the temperature
datalogger.

As additional feature, the HI504903 interface is also pro­vided with internal Fail Safe Open Line protection method.

To minimize electromagnetic interferences, it is recommended
to use shielded and twisted pair cable to connect the units.

POWER SUPPLY INPUT

The power supply input terminal can be used for powering
both the HI504903 supervisor (directly from the mains with
a 12VDC adapter) and the HI142 network (through the su­pervisor).

For HI504903, use a 12VDC adapter
(HI710005 or HI710006) and connect
the black wire to the positive input terminal
(marked “+”) and the black & white wire to
the negative one (marked “-”).

For HI142 network, connect the first HI142
using a cable made as shown in the “Ap­pendix, section 1” and connect the “+” and
“-” wires to the “+” and “-” pins of the

HI504903 power supply connector.

All hard wiring can be accomplished through four cable
glands on the bottom side of the case, by passing
wires through the rubber grommets and tightening
the nuts.

Note All connected cables should end with cable lugs.

BATTERY

FOR SAVING BATTERY, THE HI504903 IS SUP­PLIED WITH BATTERY NOT CONNECTED.

PLUG THE BATTERY CONNECTOR BEFORE
STARTING OPERATION.

Use only rechargeable sealed lead-acid battery with
12 V and 0.8 Ah capability.

1514

Note Pay attention that the battery cable is correctly connected to

Note If the interface is powered on immediately after a battery substi-

SIM CARD INSERTION

To substitute battery, please follow below instructions:

1. turn off the HI504903: turn OFF the power switch and
disconnect the interface from the mains;

2. remove the screws on the bottom of the two battery clips;

3. disconnect the battery cable from its connector;

4. substitute the old battery with a new one;

5. fix back the two girdles by tightening the screws;

6. connect the battery cable to the connector;

7. connect the interface to the mains;

8. turn ON the power switch.

the battery connector, otherwise an alarm SMS will be sent
immediately after the start-up procedure (see “Fault Condi­tion” section for details).

tution, it is possible that an alarm SMS of “Battery failure” is
sent. Ignore that message and check if the error is still active the
day after. For avoiding this problem, connect the unit to the
mains and wait for at least 10 hours before turning ON the
power switch. In this manner the new battery can be charged.

Before using the HI504903, insert a SIM card.

• Press the SIM card holder ejector on the cellular module

by using a sharp item (for example, a pen);

• Insert the SIM card in the holder and push it back in the

housing.

Note If the HI504903 has to be used for sending alarm

SMS, be sure that the SIM card can support voice
calls. If the HI504903 will be used for remote con­nection session, be sure that the SIM card supports
data calls. Please contact the cellular network op­erator for information about SIM active services.

Note Do not remove the SIM card while voltage is applied

to cellular phone. Before removing the card, turn off
the interface. Failure to do so may seriously affect
the serviceability of the HI504903.

START-UP

Turn ON the power switch (#14
on page 8): the red SMS disable
LED lights up and will stay in this
state until the start-up procedure
ended and the idle mode is en­tered.

During start-up procedure the Real Time Clock (RTC) is
checked to control if a reset occurred since last software ini­tialization. In this case, the RTC is initialized with the default
date and time 01/01/2000 - 00:00. An EEPROM reset does
not affect the RTC settings.

The EEPROM is also checked to control if it is new. In this
case, the default values are copied from ROM and the de­vice enters normal mode. Otherwise an EEPROM checksum
test is performed (the same is performed periodically during
EEPROM selftest procedure, see “Fault Condition and Selftest
Procedure” section for more details).

If checksum is not correct, the proper EEPROM error LED
indication will be given as soon as the Idle state is entered.

During start-up, the internal cellular phone is turned ON
and an initialization procedure is performed to insert PIN
code and make network registration for enabling incoming
and outcoming calls. Moreover, the telephone answering
service is disabled to avoid automatic network call forward­ing if interface is busy and can not serve immediately incoming
call.

Initialization procedure can last up to 30 seconds if no prob­lem occurs, otherwise some more time could be needed and
proper cellular LED indication will be given in idle state.

When the start-up procedure is complete, the interface enters
the idle state.

Note When the HI504903 is turned ON for the first time, it is

possible to get a cellular error indication. This can happen if
the SIM card requests a PIN code to be registered in the
network and the interface was not yet configured (see “Local
configuration” section for details).

1716

IDLE STATE

The idle state is the normal operation state for the HI504903
supervisor. While in idle state, the following main tasks are
fulfilled:

• Management of incoming remote connection and con­figuration requests (see “Interface configuration” and “PC
communication” sections for details);

• Management of incoming local connection and configu­ration requests;

• Polling procedure of connected devices;

• Diagnostic selftest procedures: battery test, cellular phone
test, EEPROM corruption data test (see “Fault condition”
and “SMS delivery” sections);

• Processing of incoming SMS’s for digital output control (if
enabled) and information SMS’s request (see “SMS deliv­ery” section);

• Sending of alarm SMS’s or information SMS’s upon user
request (see “SMS delivery” section).

When in idle state, the HI504903 can perform periodically
some diagnostic selftest procedures as: internal backup bat­tery test, cellular phone test, EEPROM corruption data test. If
one of these tests does not pass, the interface advises the
user with a visual indication about the problem using the red
and green SMS enable/disable LED’s. Please refer to “Fault
conditions and Selftest Procedures” section for more com­plete indications about interface related fault conditions.

Moreover, every 30 seconds the two green LED’s for cellular
phone signal are updated with the current signal strength,
and the indication meanings are listed in the table below:

LED Status Meaning

Cell Signal 1 (green) OFF No signal or
Cell Signal 2 (green) OFF cellular error found

Cell Signal 1 (green) ON Medium signal
Cell Signal 2 (green) OFF

Cell Signal 1 (green) ON Strong signal
Cell Signal 2 (green) ON

Also the digital output status LED is updated with the current
status of the digital output contact. The digital output contact
status can be changed by the user only by sending the proper
SMS to the interface. The below table shows the digital output
LED indication depending on the digital output status:

LED Status Meaning

Digital Output OF F Dig.output contact open
(yellow) ON Dig.output contact closed

Note The status of the digital output contact is saved in HI504903

internal memory, so that the digital output is set to the correct
value in case of a reset or after a start-up of the interface.

During polling procedure all devices connected to the inter­face through RS485 serial ports and digital input port (if
correctly configured, see “Interface Configuration” section)
are periodically queried to acquire their current status, mea­surement values and active alarms. The delay between a query
operation and the following one is user selectable, and can
vary from 1 to 10 minutes (see “Query Delay” field and “In­terface Configuration” section).
If many devices are connected to the RS485 link and the
cellular phone interface can not interrogate all the devices
within the selected delay time, then the actual interval be­comes longer than the set value.
When polling devices procedure is completed, the RS485
serial port LED (#1 on page 9) lights up if an alarm is active
at least in one of the instruments connected to the RS485 port
(up to 31 devices can be connected on the same RS485
port); the digital input port LED turns on or off depending on
the user-selected logic for closed contact (if control of digital
input port was user-enabled during last interface configura­tion).
Moreover, if an active alarm found in a device connected to
the HI504903 matches with one of those selected by the
user during last interface configuration, or if the digital input
status matches with the condition selected for triggering an
alarm message, then one (or more) SMS(s) are immediately
submitted by the HI504903 to the set cellular phone
number(s) (see “SMS delivery” section).

Note The “Query Delay” time value fixes the maximum delay be-

tween an alarm occurrence in a device and the related alarm

1918

SMS sending by the interface.
SMS can be submitted by the HI504903 supervisor only if

the SMS sending feature is enabled through an external switch
(see further on for details); if the SMS sending is disabled,
then no message will be sent upon alarm or fault condition
on connected devices.

Note To make the HI504903 queries the connected devices and

sends SMS’s, it is necessary to configure the interface, other­wise no polling procedure can take place and no alarm no­tification will be given by the interface. HI504903 can not
automatically detect which instruments are connected to the
interface; moreover, the user must select for which type of
alarms the warning SMSs have to be sent.

While in idle state, the SMS sending feature can be disabled
or enabled by the user at any time, by simply closing (or
opening) the proper external switch. If no error indication is
already active, then the red and green LED’s (#3 and #4 on
page 9) keep indication about the SMS sending enable/dis­able status:

External Switch LED Status Meaning

Open SMS enable (green) ON SMS sending enabled

SMS disable (red) OFF

Close SMS enable (green) OFF SMS sending disabled

SMS disable (red) ON

Note Sometimes the updating of LED indication about SMS send-

ing status can take a few seconds after changing the external
switch status by the user. This happens if the interface is busy
while performing procedures as polling devices, SMS send­ing, incoming call processing, etc.

While in idle state, HI504903 can serve also incoming re­quest for configuration or PC communication session
activation (both local and remote), but remote sessions (both
configuration and PC communication) can take place only if
no cellular errors are active on the interface.

INTERFACE CONFIGURATION

The HI504903 supervisor is not provided with keyboard or
display for user interfacing purpose. For first installation and for
successive changes of the system configuration, it is necessary
to use the HI504903SW Windows® compatible application
software provided with the instrument.

APPLICATION SOFTWARE INSTALLATION

To install the HI504903 configuration software on the com­puter, it is necessary a 3.5’’ drive. Insert the disk in the floppy
disk driver, execute setup.exe and then follow on-line in­structions.
After installation, run the configuration software by simply
double-clicking on HI504903SW icon and starting the con­figuration procedure.

STARTING CONFIGURATION

Before starting the configuration procedure, turn the
HI504903 on and make sure it ended the initialization pro­cedure (see “Start-up” section).
The HI504903 supervisor can be configured in two different
ways: “Local configuration” and “Remote configuration”,
which can be selected on “Connection setting” window while
running the application software.
Find here below a complete list of LED’s status during con­figuration procedure:

LED Status Meaning

RS485 channel (red) OFF -- ­Digital input (red) OFF --­SMS enable (green) OFF - -­SMS enable (red) ON -- ­Digital output (yellow) ON or OFF indication about digital output previous

status (ON: contact closed, OFF: open)

Cell Signal Quality (2, green) OFF & OFF updated only when “Phone Status”

ON & OFF button is pressed on application software
ON & ON while running on PC connected with

HI504903 device

Cell Status ON or OFF or cellular phone real time operating

blinking status (fast blinking if a remote

connection/configuration is taking
place)

2120

LOCAL CONFIGURATION

The “Local” configuration is the only one allowed for the first
configuration of HI504903 supervisor. This type of configu­ration takes place between the HI504903 device and a PC
(placed near) with HI504903SW installed, through a serial
cable connection.
To connect the HI504903 supervisor to the PC, use an
HI920010 cable. Plug one connector to the HI504903
device RS232 auxiliary connector (PC config port) and the
other one to a serial port of the PC. Before connecting the
supervisor to the PC, read the computer manual.
To proceed with local configuration, select the “Local” con­nection type on HI504903SW “Configuration Settings”
window, and on “Serial communication port” section the PC
COM port to which the serial cable is connected. Then press
“OK” to proceed (see “General Settings” section).

Note The first configuration of HI504903 must be done through

a local configuration because it is necessary to set up the
SIM card PIN code and at least one cellular phone number
for the alarm SMS sending.

Note If no answer is received from HI504903, an alarm window

will be displayed by the application software. Check if the
serial cable is correctly connected or if the HI504903 is
busy (a remote configuration or a remote connection or a
polling procedure are taking place). Try later for a new local
configuration attempt.

REMOTE CONFIGURATION

The “Remote” configuration takes place between the
HI504903 device and a PC with HI504903SW software
installed, through a data call made by a modem connected
to the PC. In this way all HI504903 parameters can be re­configured (excluding the SIM card PIN number), even if the
supervisor is located far from the PC, without requiring to
move the PC where the HI504903 is physically installed to
make a local configuration through serial cable (see “Local
Configuration” section).
To proceed with the remote configuration, select the “Remote”
connection type on HI504903SW, by checking the proper
box. On “HI 504903 phone number” field enter the phone
number of the SIM card inserted in the HI504903 and the
password (only if it was set in a previous configuration).

In the “Advanced Settings” section it is possible to give to the
modem connected to the PC a particular configuration for
the initialization string and the dial string. Note that in the
most common cases the default setting can be used. On
“Serial Communication Port” section select the COM port to
which the modem is connected.
When “OK” is pressed, the software will try to establish a
data call between the PC and the HI504903 device, and
then it is possible to proceed with the configuration (see “Con­figuration Settings” section).

Note If no answer is received from HI504903, an alarm window

will be displayed by application software. Check if the mo­dem line is busy, or HI504903 is busy (a remote configura­tion or a remote connection or a polling procedure are tak­ing place), or HI504903 cellular phone is over coverage.
Try later for a new remote configuration attempt.

2322

CONFIGURATION SETTINGS

The setup procedure is divided into three different sections,
displayed on three different folders inside the main window:

• General Options Setting (see “General Options Setting”)

• RS485 Options Setting (see “RS485 Options Settings”)

• Digital I/O Options Setting (see “Digital I/O Options Set­tings”)

Five buttons are available on the bottom of the window, which
can be pressed for performing the following actions:

“Update All” button:

Press this button to send the complete configuration to the
HI504903 device. It is possible to test all RS485 devices for
connection or not. In this way the HI504903 interface can be
configured even if devices will be connected only on a second
time to RS485 and digital input port.
If the PIN code is changed during configuration, it will be
checked and this operation lasts about 30 seconds. If no
error occurs, the message “HI504903 device correctly up­dated!” will be displayed. Otherwise the occurred errors list
will be shown and the previous configuration will be kept in
HI504903 memory.

Note If no error occurs during configuration, the previous

HI504903 setup will be lost. At start-up, 3 attempts for en­tering the cellular PIN code are available (see “General op­tions setting” section) and at each update with a wrong PIN
value, an attempt will be lost. The SMS’s stored in the SIM
card will be erased.

Note If an error occurs on cellular phone before pressing the “Up-

date All” button, the cellular phone will be turned off and on
again for trying solving the error condition. This procedure
lasts about 30 seconds.

“Load” button:

Press this button to load on the PC the last configuration stored
in the HI504903 memory.

Note By loading the HI504903 configuration, all parameters modi-

fications made till that moment will be lost. At program start­up, an automatic loading is performed.

Note At the start-up of HI504903SW program, the application

software advises the user with warning messages if some er­ror occurs on the interface.

The following fault conditions can be detected by
HI504903SW:

• “Error on cellular phone found”: warning for generic error
on cellular phone, e.g. cellular phone not network regis­tered, SIM card missing, no network coverage, cellular
phone not answering, etc.

• “Wrong cellular PIN code”: PIN code on HI504903 is
not correct.

• “PIN code missing”: PIN code needed for SIM card and
not available on current HI504903 configuration.

• “Last SMS reached”: no more SMS’s are available on the
SIM card (SIM card credit reached zero).

• “Expiration date reached”: SIM card expired.

• “Error in current device configuration. Check data before
proceeding with the new configuration”: some corrupt data
found on HI504903 internal memory (EEPROM).

“Phone status” button:

Press this button to open a secondary window for seeing the
cellular phone network registration status (“REGISTERED” or
“NOT REGISTERED”) and the signal quality.

Note The cellular status check during a remote configuration via

modem may require a few seconds more than during a local
configuration, and information may arrive with a small delay.

Note When the “Phone status” button is pressed, also the

HI504903 green LED’s for cellular signal indication are up­dated with the new real value provided by cellular phone.

“Help” button:

Press this button to display the help file.

“Exit” button:

Press this button to exit the setup program during a local con­figuration.

“Disconnect” button (for remote configuration only):

Press this button to end the remote connection with the

HI504903. The data call will be immediately stopped.

GENERAL OPTIONS SETTING

The following features are selectable in the general options
setting folder:

Telephone numbers:

It is possible to set two telephone numbers for automatic send­ing of alarm messages and sending of information messages

2524

upon a call from one of these phones. Valid values are num­bers of a maximum of 20 digits, with the country code in front

and without spaces or “+” symbol (e.g. for Italy 39335.....)

Note At least a value for telephone number #1 must be inserted to

proceed with configuration.

Note The country code is necessary, otherwise HI504903 will not be

able to send any SMS.

Note The set phone number are not saved on the phonebook

area of the SIM card. If there are some phone numbers pre­viously stored on any SIM card location, they will be not
overwritten.

HI 504903 date and time:

Date and time present in the HI504903 device can be read.
These fields can not be modified manually. To align the

HI504903 to the PC date and time, simply click on “Update
HI504903 Date and Time” check-box: the new values will be

displayed on the PC and the updating will take place when the
“Update All” button is pressed.

SIM Card options:

• On “Remaining SMSs” field it is possible to set the number
of remaining messages in the SIM card: this number gives
indication about the charge level of the SIM card. To know
the value to be inserted, divide the SIM card credit by the
cost of one SMS. This number will be decreased at every
sent message and when zero level is approaching, one or
more messages will be sent by the HI504903 device to
warn the user about the need of SIM card recharging.

Note It is useful to enable this feature in case of a rechargeable

SIM card, and disable it if an unlimited credit card is used.
If the feature is enabled, it is necessary to insert a value to
proceed with the configuration.

• On “Expiration Date” field it is possible to set the SIM card
expiration date (dd/mm/yy): this is the date after which the
SIM card expires if not recharged (usually after one year).
15 days, 7 days and 1 day before the expiration date, warn­ing SMS messages will be sent to the programmed number(s).

Note It is useful to enable this feature in case of a rechargeable SIM

card, and disable it if an unlimited credit card or a special
rechargeable SIM card is used. If the feature is enabled, it is
necessary to insert a date to proceed with the configuration.

SMS options:

• On “Repeated SMSs” field it is possible to set the number of
repeated SMSs to be sent. Each alarm or warning SMS sent
by the HI504903 device requires an explicit confirmation by
a back call from (one of) the cellular phone(s) that received
the message: this call is not answered by the HI504903, but
works as a confirmation about having read and understood
the alarm/warning message (see “SMS delivery” section). If
HI504903 does not receive this confirmation within a fixed
time interval (see the “SMS delay” section below), it will send
the alarm message again. With the “Repeated SMSs” op­tion, it is possible to set the maximum number of alarm mes­sages that will be sent in these conditions.

Note Default value is 2 repeated SMS’s.
Note Valid values are numbers from 0 (i.e. no repeated messages)

to 5. If an out-of-range value is inserted, a warning mes­sage will be displayed and the maximum allowed value (i.e.

5) is automatically set.

• On “SMS Delay” field it is possible to set the delay between
two subsequent alarm/warning SMS’s (see “SMS’s deliv­ery” section). This delay is related to the number of “Re­peated SMSs” (see above).

Note Default value is 10 minutes.
Note Valid values are from 5 to 60 minutes. If an out-of-range

value is inserted, a warning message will be displayed and
the default value is automatically set.

Note If a zero value is set in the “Repeated SMSs” section, this

feature is disabled.

• On “Query Delay” field it is possible to set the delay between
a query operation and the following one of the alarm situa­tion for all the connected devices made by HI504903. With
this option the maximum time for an alarm detection and the
relating SMS sending is set (see “Idle state” section).

Note Default value is 1 minute.
Note Valid values are from 1 to 10 minutes. If an out-of-range

value is inserted, a warning message will be displayed and
the default value is automatically set.

Note The actual interval for the query operation can be bigger

than the set value if many devices are connected to the RS485
link and the HI504903 interface has not enough time to
interrogate all the devices within the set time value.

2726

Security options:

• On “HI504903 Password” field it is possible to set the pass­word for the HI504903 device. This password protects from
unauthorized remote modem connection to one of the instru­ments 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 pass­word 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 en­tering the cellular PIN code are available, and at each up­date with a wrong PIN value, an attempt will be lost. After 3
wrong attempts, to unlock the SIM card, extract it and manu­ally 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 cel­lular 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.

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 de­fault 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 dis­played 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 tem­perature 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 connec­tion to a simple instrument provided with a digital output
port. For such instruments, an alarm output like an electro-

2928

mechanical relay or an open collector digital output can be
connected to the HI504903 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 “Freezer East Side”
to indicate an electromechanical relay (connected to the digital
input) of a freezer placed on the east side of a room. The
maximum length of this description is 20 characters.

• Information options: set the options related to the informa­tion 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 de­scription is 30 characters.

• Description of the digital input status when the contact is
open (e.g. ”OK”). The maximum length of this descrip­tion 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 maxi­mum 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 HI504903 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 con­tact, and “OPENP<cellular phone interface password>” to
open the digital output contact. If the digital output control is
enabled, when an information will be requested to HI504903,
an SMS with the digital output status will be sent.

Note By disabling this option, it will not be possible to set the digi-

tal output status and no information SMS about the digital
output will be sent.

Note If the digital output management is disabled, the digital output

will be automatically opened, even if it was previously closed.

Note If the password is not set, only “CLOSEP” or “OPENP” SMS

must be sent.

Default values

The following table lists the default value for previous items,
i.e. the factory values copy from ROM if HI504903 was
never configured.

Item Default value

Telephone #1 empty field
Telephone #2 empty field
Date from internal RTC
Time from internal RTC
Remaining SMSs disabled
Expiration date disabled
Repeated SMSs 2
SMS delay 10 minutes
Query delay 1 minute
Password disabled
PIN empty field
RS485 options no instrument configured
Digital input disabled
Digital output disabled

3130

SMS DELIVERY

Note To use the SMS feature, a SIM card able to make a voice call

ALARM SMSs

Note An alarm SMS can be sent only if SMS sending is user en-

Alarm SMSs for HI142 dataloggers

HI504903 is able to send SMSs to one (or two) cellular
phone number(s). HI504903 can send two types of mes­sage: alarm SMSs (upon an alarm condition at least in one
of the instruments connected to the interface) and informa­tion SMS (upon specific request from the user).

must be used.

Alarm messages are submitted by HI504903 to the cellular
phone number(s) when an error occurred on one of the instru­ments connected to the interface. A message about an alarm
condition in one instrument will be sent by the interface only if
the alarm is active and the specific alarm notification was en­abled during last configuration, by checking the proper box on
the “message option” window of the selected device (see “Inter­face configuration” section). If an alarm is active in one
instrument connected to the interface but its notification was not
enabled during last configuration, then no SMS will be sent
(however HI504903 gives indication to the user about the
error condition by turning on the red LED for the RS485 port or
digital input port where the instrument is connected).

abled through digital input terminal (#9 on page 8), other­wise no SMS will be issued.

The format of alarm messages for HI142 dataloggers con­nected to the RS485 port will be:
“HI142-SN<DEVICE SERIAL NUMBER>; LotlD<USER LOT
ID>; Alarms: <ALARM SPECIFIC TO THE INSTRUMENT>;
Rem msg: <NUMBER OF REMAINING MESSAGES>”
During alarm condition, the field <ALARM SPECIFIC TO THE
INSTRUMENT> on the alarm message contains the list of only

active alarms

alarms).
The <DEVICE SERIAL NUMBER> label is a 6-character text
string with the serial number of the HI142 generating the
alarm SMS.
The <USER LOT ID> label is a label (up to 16 characters) with
the user-defined lot identification: this is the identification lot

(see further on for the complete list of selectable

string that user can specify in HI92140 software before start­ing logging with HI142 (see “LotID” field in HI92140 software).

The <NUMBER OF REMAINING MESSAGES> is a value
(max. 4 digits) indicating the number of remaining messages in
the SIM card (see “Interface configuration” section).

The complete list of all available alarm indications (and their
coded notations) for HI142 temperature datalogger is:

• “Temperature”: the temperature on HI142 logger exceeds
low or high temperature limits.

• “Low battery”: the charge level of the logger battery is low
and should be replaced soon; contact the nearest Hanna

Service Center.

When all alarms are active, the message will report the entire
list as follows: “Temperature,Low battery”.

Note If during last polling procedure HI504903 was not able to

communicate with one of the HI142 dataloggers connected
to the interface, then a specific alarm SMS will be sent. This
happens if the cable between HI504903 and the instrument
is not correctly connected, the power supply on HI142 fails,
or the serial number used in HI504903 to address the log­ger is not correct (see “Interface configuration” section).

The format of this kind of alarm message will be:
“HI142-SN<DEVICE SERIAL NUMBER>; LotlD<USER LOT

ID>; Alarms: Device not responding; Rem msg: <NUMBER
OF REMAINING MESSAGES>”

Alarm SMSs for instrument connected to the digital input port

If the digital input was configured to send alarm SMSs and the
present status of port matches with the condition selected for
triggering an alarm message in the last HI504903 configura­tion (see “Interface configuration” section), then the following
SMS will be sent:

“<INSTRUMENT DESCRIPTION>; Digital input; <ALARM
DESCRIPTION>; Rem msg: <NUMBER OF REMAINING
MESSAGES>”.

Previous fields represent strings inserted by the user with the
HI504903SW software as following:

• <INSTRUMENT DESCRIPTION>: instrument description
string, maximum length is 20 characters;

• <ALARM DESCRIPTION>: alarm description string, maxi­mum length is 30 characters.

3332

Alarm SMSs specific to the interface

Two alarm SMSs are provided to inform the user about troubles
specific to the HI504903 interface, the first one concerning
the internal backup battery status, the second one about mains
power supply status.

If a problem was found during last battery test (see “Fault con­ditions and selftest procedures” section), HI504903 issues the
following alarm SMS: “Alarm! Battery test failure; Rem msg:
<NUMBER OF REMAINING MESSAGES>”. After user con­firmation of message reception (see further on), HI504903
will send back the SMS: “Battery test failure; Rem msg: <NUM­BER OF REMAINING MESSAGES>”.

Instead, in case of mains power failure (see “Power failure”
section), HI504903 issues the following alarm SMS: “Alarm!
Power failure; Rem msg: <NUMBER OF REMAINING MES­SAGES>”. After user confirmation of message reception (see
further on), HI504903 will send back the SMS: “Power fail­ure; Rem msg: <NUMBER OF REMAINING MESSAGES>”.

After a power failure event, when the mains power supply comes
back, the following message will be sent to the set phone
number(s) without any request: “Power is ok now; Rem msg:
<NUMBER OF REMAINING MESSAGES>” (this message
does not need confirmation by the user; see further on).

Note After submission of an alarm message, a phone call is made by

the instrument to the programmed number(s). This is done be­cause the SMS can be received with a considerable delay due
to network overload, while the phone call takes place immedi­ately and has a long ring, which is more likely to be heard. The
phone call advises the user that something happened on the
HI504903 (or on one of the connected instruments) and an
SMS is going to be received. It is not necessary to answer this
phone call and it is suggested to simply close it. When an error
occurs (and an alarm SMS is sent), the interface wait for a
confirmation of the message reception. The confirmation can
be done calling the HI504903 phone number (number for
voice call of the GSM module). The interface will answer hang­ing up the incoming call and send one or more SMSs about the
status of all instruments connected to the HI504903 interface
(this confirmation is managed as an information request; see
further on for details). It is also possible to configure the instru­ment to send repeated messages if confirmation is not received

immediately (see “Repeated SMS” and “SMS delay” items in
“Interface configuration” section). This feature has been intro­duced to prevent loosing of warning messages due for example
to overload of telephone lines; “Repeated SMS” item represents
the number of repeated SMSs to send, while “SMS delay” item
sets the delay time between two subsequent alarm messages.

INFORMATION SMSs

In addition to the alarm messages already described, the cellu­lar phone interface can send information messages upon request.
These messages include all relevant information that can be
got from the controlled instruments, and could be requested,
for example, after an alarm message regarding an error which
should close without any intervention. The user could also want
to be informed about the values of the measured magnitudes
or current devices status.

The information messages can be requested:

1. by making a call from one of the phone numbers programmed

for alarm messages sending: in this case the cellular phone
interface recognizes the calling phone number, hangs up
without answering and then sends to the calling number
one information message for each controlled instrument;

2. by sending an SMS from whatever cellular phone to the

device. The message must have the following format:
“P<CELLULAR PHONE INTERFACE PASSWORD>”, i.e.
the uppercase P letter followed by the cellular phone inter­face password in uppercase letters; if the password is
disabled, just “P” is enough. Upon this requesting mes­sage, the interface will send one information message for
each controlled instrument to the cellular phone which
issued the requesting SMS.

Information SMSs for HI142 dataloggers

The format of the information messages for HI142 dataloggers
is very similar to the one for alarm messages. The only differ­ence is the “Info: <INFORMATION SPECIFIC TO THE IN­STRUMENT>” string instead of “Alarms: <ALARM SPECIFIC
TO THE INSTRUMENT>” (see previous subsection for details).

The format of information messages for HI142 will be:
“HI142-SN<DEVICE SERIAL NUMBER>; LotlD<USER LOT
ID>; Info: <INFORMATION SPECIFIC TO THE INSTRU­MENT>; Rem msg: <NUMBER OF REMAINING MES­SAGES>”.

3534

For <DEVICE SERIAL NUMBER>, <USER LOT ID> and
<NUMBER OF REMAINING MESSAGES> fields, please refer
to the previous subsection.

Find here below a complete list of available information (and
coded notations) in the <INFORMATION SPECIFIC TO THE
INSTRUMENT> field for all HI142 devices connected to the
HI504903 interface:

• “Temp: ###.#C or F”: temperature reading in Celsius
(“C”) or Fahreneit (“F”) unit, depending on last datalogger
configuration. If the meter is currently logging, then the
displayed temperature value is the last logged sample, oth­erwise (logger is in delayed start or log ended status) it is
the real time temperature reading during last polling pro­cedure. If the reading is over-range the indication will be
“>>>>>”, while for under-range value the displayed
indication will be “<<<<<“.

• <LOGGER STATUS>: current logger status. There are four
operating status for HI142 loggers:

• “Log wait... (<DATE AND TIME OF LOGGING BEGIN­NING>)”: the logger is currently waiting to start the log­ging procedure; <DATE AND TIME OF LOGGING BE­GINNING> field keeps information about date and time
when the HI142 device will start to log the first sample of
the lot.

• “Logging... (<DATE AND TIME OF LOGGING END>)”:
HI142 is currently logging; <DATE AND TIME OF LOG­GING END> field keeps information about date and
time when the HI142 device will record the last sample
of the current lot.

• “Logging... (cyclic memory)”: HI142 is currently logging
in cyclic memory mode; once the memory is full, the log­ger can continue to log by overwriting the older samples
with the new ones.

• “Log ended”: HI142 is not currently logging; logging
ended or it was interrupted by the user.

• “Low al.: ###.#C or F”: alarm low limit value in Celsius
(“C”) or Fahreneit (“F”) unit, depending on last datalogger
configuration (refer to HI92140 on-line-help for details).
If no low alarm limit was set by the user, then the indication
will be “Low al.: -----C or F”.

• “High al.: ###.#C or F”: alarm high limit value in Cel­sius (“C”) or Fahreneit (“F”) unit, depending on last
datalogger configuration (refer to HI92140 on-line-help
for details). If no high alarm limit was set by the user, then
the indication will be “High al.: -----C or F”.

• “ALARMS: <ACTIVE ALARMS>”: list of all active alarms,
as previously described (see “Alarm SMSs for HI142
dataloggers” subsection). If no alarm is active, then the
indication will be “No alarms”.

Information SMSs for meter connected to the digital input port

If the digital input was configured to send information SMSs
upon a user request message (see “Interface configuration”
section), then the following SMS will be sent:

“<INSTRUMENT DESCRIPTION>; Digital input; <DESCRIP­TION FOR THE DIGITAL INPUT STATUS>; Rem msg:
<NUMBER OF REMAINING MESSAGES>”.
<INSTRUMENT DESCRIPTION> field is the same as for the
alarm SMS; <DESCRIPTION FOR THE DIGITAL INPUT STA­TUS> is one of the two description strings defined by the user
with HI504903SW software on last interface configuration re­lated to present digital input status (close or open).

Here is a message example: “Freezer East Side; Digital Input;
Port is open; Rem msg:32”.

Note If no information is available regarding an instrument because

it did not answer to HI504903 during last polling procedure,
then the following “Device not responding” string will appear
for <INFORMATION SPECIFIC TO THE INSTRUMENT> field.

Note If SMS sending is disabled through the external switch, then

HI504903 sends only the message: “SMS disabled; Rem
msg: <NUMBER OF REMAINING MESSAGES>”.

Note The information about SIM charge and expiration date are

not saved in the SIM card, but are managed by the network
operator; the instrument can not get directly the information.
To prevent the discharge of the SIM card, the user has to
configure manually (according with the credit stored on the
SIM card) the maximum number of SMSs that can be sent
(see “Interface configuration” section).

Note Every time an SMS is submitted, the <NUMBER OF REMAIN-

ING MESSAGES> is updated and it will always indicate the
remaining number of messages that can be sent by the in­strument. When this number is going to reach zero, the mes-

3736

sage “Maximum number of SMSs reached. Please check the
HI504903 SIM charge level; Rem msg: <NUMBER OF RE­MAINING MESSAGES>” will be sent by the instrument to
the programmed cellular phone number(s). This particular
situation is managed as an error occurrence and a confir­mation is waited. When this happens, no more messages will
be sent by the interface until the error is disactivated.

Also a cellular error indication is given by
interface: green and red LEDs disable/enable
blink together. To disactivate this error and
restore the SMS service, it is necessary to re­charge the SIM card credit.

Note Every time a recharge of the cellular module SIM card is

performed, the corresponding expiration date has to be manu­ally updated with the application software HI504903SW (see
“Interface configuration” section). A check is performed daily
between the current (Real Time Clock) and the expiration
date. Two weeks before the expiration date, the message “The
HI504903 SIM card will expire on DD-MM-YYYY. Please re­charge or substitute it” is sent to the programmed phone
number(s). The same message will be sent again also one
week before and the day before the expiration date. This par­ticular warning message does not need confirmation. In this
case the user has to recharge or substitute the SIM card. The
sending of the repeated warning messages will be reset when
the expiration date is changed. If the expiration date is reached
without any updating of the “Expiration Date” item (see “In­terface configuration” section), then no more messages will
be sent by the interface until error is disactivated and a cellu­lar error indication will be given. To disactivate this error it is
necessary to update the SIM expiration date.

Note If the user has unlimited credit on the SIM card (i.e. option was

disabled during last interface configuration), the value of re­maining messages will not be decrement and no check will be
performed on the SIM expiration date. Moreover, at the end of
each SMS there will not be the remaining-messages informa­tion (“Rem msg: <NUMBER OF REMAINING MESSAGES>”).

DIGITAL OUTPUT CONTROL

The user can control the digital output status simply sending an
SMS to HI504903 (one to close and one to open the port).
Following messages can be sent from whatever cellular phone
to change the status:

• “CLOSEP<cellular phone interface password>” to close the
contact (if password is enabled)

• “CLOSEP” to close the contact (if password is disabled)

• “OPENP<cellular phone interface password>” to open the
contact (if password is enabled)

• “OPENP” to open the contact (if password is disabled)

Note All the letters for <cellular phone interface password> in the

message must be in uppercase format.
After one of these messages is received by the interface and the

correspondent action performed, a message confirming the new
status of the digital output port is sent back by the interface:

• “Digital Output: Contact Closed”, if digital output contact is
closed;

• “Digital Output: Contact Open”, if digital output contact is
open.

Previous messages are sent also by the interface upon an user
information request, if digital output control was enabled.

Note If a communication problem with internal cellular phone oc-

curs during the normal functioning of the interface, the cellu­lar error indication will be switched on and no SMS can be
submitted until the error will be disactivated (when this error
occurs, the instrument will try repeatedly to initialize the cellu­lar engine and the error will be disactivated only after a suc­cessful initialization).

3938

PC COMMUNICATION

HI504903 interface can act as a gateway for a connection
through a remote computer. With this feature a seamless data
connection will be established between a computer and what­ever instrument connected and previously correctly configured
on the HI504903 interface through HI504903SW appli-
cation software (see “Interface configuration” section).

Through a PC communication session it is possible to down­load on the PC all information, alarms and fault conditions
regarding all instruments connected to HI504903 through
only one data communication link towards HI504903 in-
terface (no need to perform as many data links as many
instruments have to be queried). Actually, once data call is in
progress, the user can select with which instrument (con­nected to the interface) he wants to communicate and switch
among the various instruments at any time.

There are two ways for establishing a PC communication
session: the “local” one with a serial cable, and the “remote”
one through a modem connected to the PC (see below).

Data transmission to the PC from dataloggers connected to
the interface (both local and remote) is possible with the
HI92140 Windows
by Hanna Instruments.

The user-friendly HI92140 offers a variety of features such
as logging selected variables or plotting the recorded data. It
is also provided with an on-line help feature to support the
user through the operation.

HI92140 makes it possible to use the powerful means of the
most diffuses spreadsheet programs (Excel
Simply run the favorite spread sheet and open the file down­loaded by HI92140. It is then possible to elaborate the data
with the selected software (e.g. graphics, statistical analysis).

To install HI92140 are required only a 3.5” drive and a few
minutes to follow the instructions printed on the disk label.

Contact your Hanna Dealer to request a copy.

LOCAL COMMUNICATION

This type of communication session takes place between the
HI504903 device and one (placed near) PC with HI92140
application software installed, towards a serial cable con-

®

compatible application software offered

©

, Lotus 1-2-3©, etc.).

nection. To connect the HI504903 supervisor to PC use an
HI920010 cable. Plug the connectors, one to the supervi­sor RS232 auxiliary connector (PC config port), and the other
one to a serial port of the PC.

REMOTE COMMUNICATION

This type of communication session takes place between the
HI504903 device and one remote PC with the HI92140
application software installed, through a data call made by a
modem connected to the PC. The incoming call is answered
by the interface and then a seamless data connection will be
established between any connected instrument and remote
computer. In this way it is possible to monitor a meter even if
it is placed long far from the operator position.

Note During remote communication, yellow LED for cellular status

(when available) blinks fast to indicate data call in progress.

Note HI504903 will be able to establish a remote communica-

tion only if the used SIM card is enabled for data call. Please
contact the cellular phone network operator for active ser­vices on the used SIM card.

No connection can be established towards an instrument not
configured on HI504903 interface, even if electric wiring is
correctly performed between HI504903 and the instrument
itself. Please refer to the HI92140 on-line help for more
details.

Note If mains power supply failure occurs on HI504903 side while

a PC communication session is taking place, HI504903
enters in power failure status (see “Power failure status” sec­tion) and communication session is immediately aborted.
Moreover, in remote communication case cellular phone
hangs up and telephone line is released.

Note While a PC communication session towards a remote com-

puter is taking place, devices connected to HI504903 are
not polled. So if some new alarms occur meanwhile, no SMS
is sent by the phone interface. Configured alarm messages
are sent when the connection ends, if the correspondent alarm
is still active. Also information messages are temporarily sus­pended.

4140

PC COMMUNICATION PROTOCOL

Even if it is strongly recommended to use HI92140 software
to establish local or remote connections between HI504903
and a PC, it is possible to try also without HI92140 by build­ing the application software for communication session
management (i.e. session establishment, serial port channel
selection and session termination). It is necessary to issue to
the interface towards PC some simple commands accom­plishing with the protocol implemented on HI504903.
Commands are composed of three parts: command identi­fier, parameter (when needed), end of command. The end of
the commands corresponds to the CR char (0x0d).

Following is the complete list of available commands:

Command Parameter Remarks

PWD <interface password> Send the general password (*)
C0A not available Request to RS485 channel selection

(*) 6 to 20 characters long ASCII string representing interface

password (letters in uppercase format)

Local PC connection session establishment

To start a local PC connection the application software has to
perform the following operations on PC side:

• Set baud rate at 9600 bps on the selected PC serial port.

• Pull up the DTR line of the serial port and wait for phone
interface “RDY<CR>” answer. The DTR line must remain
high while application software is running; if the DTR goes
down while communication is taking place, then HI504903
aborts immediately the current PC communication session.

• If the password was enabled in the phone interface during
last configuration (see “Interface configuration“ section), the
application software must send the password through the com­mand “PWD<interface password><CR>” and the interface
will answer <ACK> (char 0x06) if the password is correct, or
<CAN> (char 0x18) if password is wrong or <NAK> (char
0x15) if command syntax is wrong.

Remote PC connection session establishment

To open a remote PC connection the application software has
to perform the following operations on PC side:

• Set the baud rate at 9600 bps for the serial port where mo­dem is connected and continue to use this value for all the
time the communication is in place;

• Make a data call to cellular phone number with the modem;

• After the reception of the “CONNECT” notification string
(i.e. the data connection establishment), wait for the string
“RDY<CR>” issued by the interface: this means that the
interface is ready to receive a command from the remote PC;

• If the password was enabled in the phone interface during
last configuration (see “Interface configuration”), the appli­cation software must send the password within 3 minutes
through the command “PWD<interface password><CR>”
and the interface will answer <ACK> (char 0x06) if the pass­word is correct, or <CAN> (char 0x18) if password is not
correct, or <NAK> (char 0x15) if command syntax is wrong,
and hangs up the call when 3 minutes have elapsed.

Local channel selection

Before communicating with one of the loggers attached to
HI504903, the application software on remote PC needs to
specify to the interface to use the RS485 channel with 1200 bps
(this is baud rate used by interface to communicate with HI142
during polling procedure). To do this, the C0A<CR> com­mand has to be sent to HI504903. The cellular phone interface
will send back <ACK> if the command is correctly recognized,
otherwise <NAK>. <CAN> is sent back if the required chan­nel is not configured in the instrument. When command is
correctly recognized, baud rate in the local PC must be set to
1200 bps. In this way the local PC and the selected instrument
are connected directly and everything works like a direct point­to-point connection (if we exclude the delay issues).

Remote channel selection

Also in remote communication session the application software
needs to select a channel, but the procedure is a bit different
from the local one. Before communicating with one of the in­struments attached to HI504903, the application software on
remote PC needs to specify to the interface to use the RS485
channel with 1200 bps. To do this, the C0A<CR> command
has to be sent to cellular interface. The phone interface will
send back “+++” (the “+++” is needed to return tempo­rarily to command mode in the cell phone to change baud
rate) and then, after several seconds, <ACK> if the command
is correctly recognized, otherwise <NAK>. <CAN> answer is
sent back if the required channel is not configured in the instru­ment. When command is correctly recognized, the local PC
and the selected remote instrument are connected directly and

4342

everything is works like a direct point-to-point connection (if the
delay issues are excluded). No need to change baud rate value
on PC side as modem buffers handle automatically the baud
rate difference (remember that the baud rate must be kept at
9600 bps in remote communication on PC).

Local PC connection closure

The application software can close a local PC connection pull­ing down the DTR line of the serial port at any moment.

Remote PC connection closure

The application software can close a remote PC connection
hanging up the data call sending to the modem “+++” and
then, after “OK” reception, “ATH<CR>” commands at any
moment.
An automatic disconnection on HI504903 side takes place if
no character is received in 8 minutes.

LEDs STATUS DURING PC COMMUNICATION SESSION

Following is a table with all possible status of HI504903 LEDs
during a PC communication session:

LED Status Meaning

RS485 channel (red)

Digital input (red)
SMS enable (green)
SMS enable (red)
Digital output (yellow)

Cell signal quality
(2 green LEDs)

Cell status (yellow)

OFF Not yet channel selection made by

remote PC

Blinking Communication session in progress

between remote PC and one or more

HI142 dataloggers on RS485 channel
OFF --- (no meaning)
OFF --- (no meaning)
ON --- (no meaning)
ON / OFF Indication about digital output

previous status (ON if contact closed,

OFF if contact open)
both OFF, or Indication about last cellular signal

ON + OFF, or strength before PC communication
both ON session beginning

ON / OFF / blinking Cellular phone real time operating

status (fast blinking if remote

communication is taking place)

POWER FAILURE

The power failure status is the working mode of HI504903
when the mains power supply fails and the interface works
using the internal backup battery.
In this situation the green “SMS enable” and red “SMS dis­able” LEDs are in the following conditions:

LED Status Meaning

SMS enable (green) blinking SMS sending enabled
SMS disable (red) OF F

SMS enable (green) OFF SMS sending disabled
SMS disable (red) blinking

All other LEDs (excluding the digital output LED when the
digital output contact is closed) are turned off.
If the SMS sending is user enabled, then alarm SMS related
to power failure event will be sent by HI504903 to the pro­grammed number(s) (see “SMS delivery” section).
After that, if

1. sending of maximum number of repeated messages is
reached without user confirmation, or

2. HI504903 receives a phone call from one of the pro­grammed number(s) to confirm alarm SMS reception, or

3. SMS sending is disabled through external switch,

then HI504903 turns off the cellular phone engine to pre­vent internal backup battery consumption.

Note If SMS sending was disabled before power supply failure event,

then cellular phone is immediately turned off and no alarm
will be issued by interface.

While in power failure status HI504903 does not perform
device polling procedure, so that new alarms on instruments
connected to the interface can not be notified.
Also interface configuration and PC communications (both lo­cal & remote) are not allowed until mains supply comes back.
When the mains power supply comes back, the cellular phone
turns on and cellular initialization procedure takes place (it
keeps about 30 seconds). As in start-up procedure, during
cellular phone initialization the red LED for SMS disable turns
on while the green LED (SMS enable) turns off. When cellular
phone is ready, HI504903 sends the SMS “Power is OK now!”
to the programmed number(s), if SMS sending is enabled.

4544

FAULT CONDITIONS & SELFTEST PROCEDURES

HI504903 is provided with some selftest procedures to pre­vent interface problems. The below fault conditions may be
detected by the software:

• EEPROM data error

• Cellular phone error

• Battery test failure
If a problem is found, HI504903 gives to the user a “vi-

sual” indication through green and red LEDs for SMS sending
enable/disable (also for battery test failure an alarm SMS is
submitted to the programmed number(s)).

EEPROM DATA ERROR

EEPROM data error can be detected through automatic
EEPROM test procedure. HI504903 performs this test at start­up and once every hour.
When an EEPROM data error is detected (i.e. if a checksum
control fails), HI504903 tries to repair the corrupted data. If
it does not succeed, a fault alarm is generated for EEPROM
corruption error. To close this error a new local interface con­figuration is required.
As soon as an EEPROM error is detected, the following “vi­sual” LED indication is provided by the interface:

LED Status Meaning

SMS enable (green) ON EEPROM data
SMS disable (red) ON corrupted

Note While EEPROM data error is active no polling operation is

performed. Remote PC communication and remote interface
configuration can not take place. Only a local PC configu­ration is allowed in order to let the user to verify EEPROM
stored data and to correct the corrupted ones.

CELLULAR PHONE ERROR

During the normal functioning of the interface if a problem
occurs in communication with the cellular engine, a cellular
error will be switched on. HI504903 performs periodically (every
10 minutes) a cellular test to be sure that the cellular phone
engine is ready and network registered. Moreover, a cellular
error can be generated if the SIM card expiration date is reached
or when the number of remaining messages reached zero.

If cellular error is active, the following “visual” LED indica­tion will be given by the interface:

LED Status Meaning

SMS enable (green) blinking Cellular phone
SMS disable (red) blinking error

When this error occurs, the instrument will try repeatedly to
initialize the cellular phone engine and the error will be

disactivated only after a successful initialization.

Note If SIM card expired or maximum number of remaining mes-

sages reached zero, the only way to disactivate cellular error
is to recharge or substitute the SIM card.

While cellular error is active no remote configuration and PC
communication session can take place until error will be
disactivated. Also SMS service is not available.

BATTERY TEST FAILURE

HI504903 can test the internal backup battery in order to

check if it is good and correctly connected on the main board.
Interface performs the battery test at device start-up and once a
day at 15:00 (3:00 pm).
If battery test is not successful, then an alarm SMS is submitted
by HI504903 supervisor to the programmed number(s) as
described on the “SMS delivery” section. Also repeated SMSs
are sent if no user confirmation is received.

Note Every day, after this test procedure, related alarm SMS for bat-

tery test failure will be submitted by the interface even if an user
confirmation was received the day before (if there is still prob­lem with internal battery). The only way to prevent alarm SMS
sending is to solve the problem related to the internal battery.
While battery problem persists green “SMS enable” and red
“SMS disable” LEDs are in the following conditions:

LED Status Meaning

SMS enable (green) blinking Battery test failed and
SMS disable (red) ON SMS sending enabled

SMS enable (green) ON Battery test failed and
SMS disable (red) blinking SMS sending disabled

Note Before removing battery or checking its capability, make sure

that the HI504903 is turned off.

Note Even if a battery problem persists, all HI504903 functions

are still available.

4746

LED INDICATORS

Find here below a brief explanation of all possible LEDs indi­cations of HI504903 interface.

RS485 PORT LED

This red LED keeps indication about devices connected to the
RS485 port.

• LED off

• 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 com­munication 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 soft­ware enabled) depending on last interface configuration setting.

• LED off

• 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

• in idle state: no instrument is configured or no alarm is on

• during PC communication session: not yet channel selec­tion made by remote PC

• 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

• 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 net­work and a call is in progress

4948

ERRORS PRIORITY

TROUBLESHOOTING GUIDE

HI504903 is provided with some selftest procedures and
related “visual” LED indications when some of these tests
failed, in order to make the user understand the interface
related problem (see “Fault conditions and selftest proce­dures” section).

Only two LEDs (green and red LEDs for SMS sending enable/
disable) are available to give information to the user about
active errors, and no more than one can be shown at the
same time. For this reason every error type has an associated
priority level, as described in the following table:

Error type Priority level

Power failure 4
EEPROM data corruption 3
Cellular error 2
Battery test failure 1

If more than one fault condition occurs simultaneously, then
errors with lower priority level are masked by error with high
one: only error indication with higher priority will be visible
by the user.

If troubles occur with the HI504903 device, follow the be­low guidelines.

INTERFACE CONFIGURATION

• One (or more) HI142 datalogger(s) is (are) not recognized

by HI504903 interface during interface configuration with
provided application software HI504903SW on “test device”
procedure.

Possible causes

Configuration parameters for serial com­munication between HI504903 and
HI142 datalogger are not correct.

Mains power supply missing on HI142
datalogger.

Wiring not correctly performed.

• During local interface configuration attempt the HI504903SW

software can not connect to the HI504903 interface.

Possible causes

Wiring not correctly performed.

HI504903 interface is busy (a remote
PC communication or remote interface
configuration is already in place, inter­face is performing the polling procedure
for a not responding device, etc.).

HI504903 is in power failure status.

HI504903 interface is turned off.

Solutions

Check if the HI142 serial number parameter
for serial communication set with HI504903SW
application software matches with the one of
the datalogger.

Provide the mains power supply to HI142
datalogger.

Check if HI142 datalogger is correctly con­nected to the HI504903 supervisor.

Solutions

Check if the HI920010 cable is correctly con­nected to the RS232 serial port on the PC and
to the auxiliary serial port on the HI504903
interface.

Try to connect later.

Restore mains power supply or wait for power
supply comes back.

Turn on the HI504903 interface.

5150

• During remote interface configuration attempt the

HI504903SW software can not connect to the HI504903
interface.

Possible causes

Modem on PC is turned off.
SIM card on HI504903 is not able to

make data calls.

HI504903 interface is out of coverage.

HI504903 interface is busy (PC com-

munications or interface configurations,
both remote and local, are already in
place, interface is performing the polling
procedure for a not responding device,
etc.).

HI504903 is in power failure status.

HI504903 interface is turned off.

PC COMMUNICATION

• No local “PC communication session” can take place with

HI504903 interface : see case “During local interface con­figuration attempt the HI504903SW software can not connect
to the HI504903 interface” on the “Interface configuration
troubleshooting” section.

• No remote “PC communication session” can take place with
HI504903 interface : see case “During remote interface con­figuration attempt the HI504903SW software can not connect
to the HI504903 interface” on the “Interface configuration
troubleshooting” section.

• Can not communicate with one of the dataloggers connected
to HI504903 interface.

Possible causes

Wiring not correctly performed.

Solutions

Turn on the modem and try again.
Change the SIM card with one enabled

for data calls.
Note: Some SIM cards can be used both for

data and voice calls. Please check the
network operator for further details.

Install HI504903 interface in a place with good
network coverage.

Try to connect later.

Restore mains power supply or wait for power
supply comes back.

Turn on the HI504903 interface.

Solutions

Check if the remote HI142 datalogger is cor­rectly connected to HI504903 interface.

Possible causes
HI504903 not configured for commu-

nication with remote HI142 datalogger.

Mains power supply missing on HI142
datalogger.

SMS DELIVERY

• Can not receive alarm SMS even if an alarm is active on one

HI142 datalogger connected to HI504903 interface.

Possible causes
HI504903 not configured for commu-

nication with datalogger.

HI504903 not configured for sending
SMS upon an alarm active on device.

Destination telephone number stored on
interface is not correct or country code
missing.

SMS sending disabled through external
switch.

SIM card on HI504903 expired or credit
reached zero.

SIM card on HI504903 is not able to
make voice calls.

Solutions

Run HI504903SW application software and
configure HI504903 for communication
with remote datalogger.
Note: No PC communication session can take

place if a device is not configured in
HI504903, even if electric wiring is cor­rectly performed between interface and
device.

Provide the mains power supply to HI142
datalogger.

Solutions

Run HI504903SW application software and
configure HI504903 for communication
with datalogger.

Run HI504903SW application software and
enable the specific alarm notification check­ing the proper box on “message option”
window of selected device.

Run HI504903SW application software and
check if destination telephone number is
correct and if includes country code.

Enable SMS sending through external switch.

Recharge or substitute the SIM card.

Change the SIM card with one enabled
for voice calls.
Note: Some SIM cards can be used both for

data and voice calls. Please check the
network operator for further details.

5352

• Can not receive alarm SMSs regarding digital input port.

Possible causes

Wiring not correctly performed.

HI504903 not configured to send alarm
SMSs for digital input port status.

Current status of digital input port does
not match with the one set on HI504903
interface.

SMS sending disabled through external
switch.

• Can not control digital output contact through SMS messages.

Solutions

Check if wires on digital input port are correctly
connected to HI504903 supervisor.

Run HI504903SW application software and
enable digital input on HI504903.

Run HI504903SW application software and
change the options for SMS sending logic
on “digital input” window.

Enable SMS sending through external switch.

ACCESSORIES

HI 710005 12 VDC to 115 VAC power adapter, USA plug
HI 710006 12 VDC to 230 VAC power adapter, European plug
HI 710012 12 VDC to 230 VAC power adapter, UK plug
HI 710013 12 VDC to 230 VAC power adapter, South African plug
HI 710014 12 VDC to 230 VAC power adapter, Australian plug

HI 920010 9 to 9-pin RS232 connection cable
HI 92140 Windows

®

Compatible Application Software

Possible causes

Wiring not correctly performed.

HI504903 not configured to control and
send information SMSs for digital output
port status.

Interface password on SMS message not
correct or not inserted, but needed.

• Can not receive the HI504903 phone call after the recep-

tion of an alarm SMS.

Possible causes

SIM card on HI504903 is not able to
make voice calls.

Solutions

Check if wires on digital output port are cor­rectly connected to HI504903 supervisor.

Run HI504903SW application software and
configure HI504903 for controlling and
sending information SMSs related to digi­tal output contact on “digital output”
window.

Insert or check the interface password on the
SMS sent.

Solutions

Change the SIM card with one enabled
for voice calls.
Note: Some SIM cards can be used both for

data and voice calls. Please check the
network operator for further details.

5554

APPENDIX

SECTION 1: CONNECTING THE HI142 NETWORK TO HI504903

For connecting the first HI142 datalogger to the HI504903
interface, make a cable for both RS485 and power supply
connections.

A 4-wire cable and an RJ11 jack (male connector) are neces­sary, then follow the below diagram:

SECTION 2: CONNECTING HI142 TO HI142

For connecting one HI142 datalogger to the next one, make
a cable as explained on the below diagram, by using a 4­wire cable and two RJ11 jacks (male connectors):

SECTION 3: RS232 AUXILIARY PORT

HI504903 is provided with an auxiliary RS232 port (D-Sub

9-pole female plug) for connection to a local PC using an
HI920010 Hanna cable.

If the provided HI920010 Hanna cable is too short for your
application, it is possible to make a longer communication
cable (up to 15 m long) by following the below table for pin
connections.

PC side

female connector pin

2
3
4
5
6

HI504903 side

male connector pin

3
2
6
5
4

5756

CE DECLARATION OF CONFORMITY

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the
environment in which it is used.
Operation of this instrument in residential areas could cause unacceptable
interferences to radio and TV equipment.
To maintain the EMC performance of equipment, the recommended
cables noted in the user's manual must be used.
Any variation introduced by the user to the supplied equipment may
degrade the instruments' EMC performance.
To avoid electrical shock, do not use this instrument when voltage at the
measurement surface exceed 24VAC or 60VDC.
To avoid damage or burns, do not perform any measurement in microwave
ovens.
External cables to be connected to the instrument should be terminated with
cable lugs.

5958

TECHNICAL SERVICE CONTACTS

Australia: Tel. [phone] • Fax [phone]

China: Tel. [phone] • Fax [phone]

Egypt: Tel. & Fax [phone]

Germany: Tel. [phone] • Fax [phone]

Greece: Tel. [phone] • Fax [phone]

Indonesia: Tel. [phone] • Fax [phone]

Japan: Tel. [phone] • Fax [phone]

Korea: Tel. [phone] • Fax [phone]

Malaysia: Tel. [phone] • Fax [phone]

Singapore: Tel. [phone] • Fax [phone]

South Africa: Tel. [phone] • Fax [phone]

Taiwan: Tel. [phone] • Fax [phone]

Thailand: Tel. [phone] • Fax [phone]

United Kingdom: Tel. [phone] • Fax [phone]

USA: Tel. [phone] • Fax [phone]

For additional Technical Support in your local language,

see www.hannainst.com

MAN504903 07/04

60