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ANALOG OUTPUT
The meter is provided with two insulated
current outputs .
It is possible to configure the operating mode of each output
through setup menu (items O .10 and O .20) .
If the meter is configured as an ORP controller, the output
#2 can be enabled to operate in control mode only (setup
item O .20 set to "SEt"; see the "Control through analog
output" section for more details) .
If the meter is set as a pH controller, each available output
can be used as recorder or in control mode .
To configure an output to control mode the corresponding
item (O .10 for output #1 and O .20 for output #2) has to
be set to "SEt" (see the "Control through analog output"
section for more details) .
When set to recorder (setup item O .10 or O .20 set to
"rECO"), the output #1 gives a current signal proportional
to the actual pH value, while the output #2 gives a signal
proportional to the temperature value .
By default, the minimum and maximum values of analog
output correspond to the minimum and maximum of meter's
range . For example, for a selected analog output of 4-20
mA associated to output #1, the default values are -2 .00
and 16 .00 pH corresponding to 4 and 20 mA respectively .
These values can be changed by the user to have the analog
output matching a different pH range; for example, 4mA
= 3 .00pH and 20mA = 5 .00pH .
To change the default values, enter the setup mode and
change the items O .12 and O .13 for output #1, and O .22
and O .23 for output #2 .
The analog output signal range (0-20 mA or 4-20 mA)
of each output is also selectable through the setup items
O .11 and O .21 .
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