YSI WaterLog Series, Owner'S Manual

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4 to 20 Milliamp (4-20mA) Output
The 4-20mA output connection points are at the far right of the lower terminal strip.
Several instrumentation applications use sensors that provide an industry standard 4-20 milliamp
output signal. The System 5000
data logger / DCP can output a 4-20mA signal based on any of
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its inputs. For example, a user may want to connect a temperature probe to the System 5000
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and convert the temperature value into a 4-20mA output. A temperature probe on Analog
Channel 1 that produces a 0 to 5 volt output representing 0 to 100 degrees Celsius could easily be
setup to produce a 4-20 mA output that represents the 0 to 100 degrees. The System 5000
does
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not actually output a 4-20mA signal, but rather controls the current in an isolated externally
powered loop. The following figure shows a basic connection diagram.
2-6 Hardware Overview
System 5000
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