Analog Output - Hanna Instruments HI21 Series Instruction Manual

ANALOG OUTPUT

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All models HI21XY1, HI21XY3 and HI22XY1 are provided
with the analog output feature.
The output is isolated and can be a voltage or a current.
With the recorder, simply connect the common port to the
ground output and the second port to the current output
or voltage output (depending
on which parameter is being
used) as depicted aside.
The type (voltage or current) and the range of the output
analog signal is selectable through the jumpers on the
power board.
Configurations of the jumpers are as follows:
Output
0-5 Vdc, 1-5 Vdc
0-10 Vdc
0-20 mA, 4-20 mA
0-1 mA
Choice between different ranges with the same configura-
tion (for example 0-20 mA and 4-20 mA) is achieved via
software by entering the setup mode and selecting code 40
(see Setup Mode section for exact procedure).
Factory default is jumpers 1 and 3 closed (ON) and jumpers
2 and 4 open (OFF), i.e. 0-20 mA, 4-20 mA and 0-10 VDC.
In any case, contact your local Hanna Instruments Office
for changing of the default configuration.
By default the minimum and maximum values of analog
output correspond to the minimum and maximum of the
range of the meter. For example, for the HI21 series with
a selected analog output of 4-20 mA, the default values
are 0.00 and 14.00 pH corresponding to 4 and 20 mA,
respectively.
Jumper 1 Jumper 2
OFF ON
ON OFF
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Jumper 3 Jumper 4
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ON ---
OFF ---