Hanna-instruments HI 504903 Manual de usuario descargar pdf (Pagina 16)

3130

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

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 informa-

tion SMSs to be received upon phone call:

• Red LED status when the contact is closed (ON/OFF).

• Description of the digital input status when the contact is

closed (e.g. “ALARM!”). The maximum length of this de-

scription is 30 characters.

• Description of the digital input status when the contact is

open (e.g. ”OK”). The maximum length of this descrip-

tion is 30 characters.

• Alarm options: set the options related to the alarm SMSs:

• Enable alarm: the alarm SMSs sending can be enabled

or disabled.

• The alarm can be triggered upon the closing or opening

of a contact on digital output (default trigger event is

closed contact).

• Alarm description string (e.g. “ALARM #1!”). The maxi-

mum length of this description is 30 characters.

Digital output section

It is possible to enable (or disable) the control of the digital

output status connected to the 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 con-

tact, 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.

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