Hanna Instruments HI 504901 Instruction Manual Download

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• “pH Range alarm”: this alarm is triggered when the real

time value of the pH sensor #1 is outside a dead band set
by the user during instrument setup.

• “EC Range alarm”: this alarm is triggered when the real

time value of the EC sensor #1 is outside a dead band set
by the user during instrument setup.

• “#n Filter dirty alarm”: this alarm indicates that the “n”-th

filter requires cleaning.

• “#n Fertilizer low level alarm”: this alarm is triggered if the

fertilizer level of the “n”-th designated tank reached a mini-
mum value.

• “Acid low level alarm”: this alarm is triggered if the level of

the acid (or alkaline) tank reached a minimum value.

• “No water supply alarm”: this alarm is triggered due to an

incoming water supply failure event.

Please refer to the

HI8001

and

HI8002

Instruction Manual

for a complete explanation of the above alarm conditions.

RS485 OPTIONS SETTING

In this section it is possible to set all options related to the
RS485 communication channel towards the instruments with
an RS485 output.
The maximum number of instruments that can be connected to
the same bus is 32. To set the instrument options, click on one
of the 32 available buttons and then set the following features:
• Instrument name: select the name of the instrument con-

nected to the RS485 from a list (

HI700

HI710

HI23

HI24

HI504

and

HI504910

). To disable an instrument

previously inserted, select “NO INSTRUMENT”.

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

fault baud rate value is automatically proposed. It is pos-
sible to select a different value from a list (1200, 2400,
4800 and 9600 bps).

Note

All instruments connected to RS485 must be set with the same
baud rate value. Once a new instrument is added in

HI504901

configuration, the current RS485 baud rate value

is proposed: it is possible to change this value, but this modi-
fication will be applied to all the instruments previously con-
figured.

• RS485 address: it is the RS485 address of the instrument

(allowed values are within 0 to 99 range). Each instrument
must have a different value for this field.

Note

If the SIM card PIN number is longer than 4 digits, it has to
be changed before using it in the

HI504901

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

HI504901

(see “Installation” section) and use the new

PIN number in the next interface local configuration.

RS232 OPTIONS SETTING

In this section it is possible to set all options related to the
RS232 communication channels towards the instruments within
an RS232 output port. A channel can be enabled only if an
instrument is connected to it. For each channel the following
options have to be set:
• Instrument name: select the name of the instrument con-

nected to the RS232 channel from a list (

HI8001

and

HI8002

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

fault baud rate value is automatically proposed (i.e. 9600
bps). It is possible to select a different value from a list
(1200, 2400, 4800 and 9600 bps).

• Password: click on the “Password” button to set the correct

instrument password. Insert the password (masked display)
and then confirm it. If no password is set in

HI8001

and

HI8002

controllers, use the default password (i.e. 0000).

• Messages options: to set the alarm message options, click on

the “Message Options” button. The available options de-
pend on the selected instrument (see also following sections).

HI8001 and HI8002 Message Options:

In this window it is possible to choose in which alarm condi-
tions for

HI8001

and