Dataq Instruments DI-158 Series, Руководство пользователя

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To avoid this, place the shunt resistor on the low side of the circuit (Figure 4).
With the shunt resistor on the low side of the circuit the data acquisition device sees only the voltage across the resis-
tor. This allows you to measure just the voltage across the shunt resistor (1-5V).
The same principles apply to a multi-sensor configuration. Use the following diagram for proper multi-sensor process
measurement connections.
With proper precautions, process current measurements can be made with little if any risk to your data acquisition
equipment. To eliminate the risk all together consider a data acquisition product that provides isolation (DI-5B32-
XX, DI-5B42-XX, DI-8B32-XX, DI-8B42-XX). For more information about isolation see the application notes on
the web: “Process Current Data Acquisition” and “Learn the Importance of Isolation in Four Easy Lessons.”
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