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Energy Probe overview

To capture energy data for Streamline you must have either an Energy Probe or a supported NI DAQ device.

The Energy Probe is designed to be a low impact, inexpensive solution to give application and system software developers quick feedback on the impact of their code on the system energy footprint. It is intended to provide a better understanding of the static and dynamic behavior of the target system for the purposes of debugging, profiling, and analysis. It is not intended to be a high-precision data acquisition instrument for power benchmarking.

The Energy Probe has three power connectors, each of which is designed to connect to a 2-pin header for measuring the power. This allows the energy probe to provide three independent power, current, or voltage measurements.

Figure 11-1 Energy Probe schematic


In addition to the three power connectors, the Energy Probe has a single pin GND connector that must be connected to ground on your target board. It provides a ground connection for the Energy Probe.

Each of the three power connectors measures:

  • The current flow through a shunt resistor of a known value on your target system
  • The voltage at the positive terminals of the Energy Probe.

Figure 11-2 Energy Probe electrical connection example


CAUTION:

The Energy Probe has flying leads and must be carefully connected to your target. Do not plug the green ground wire into anything but the target ground. This includes I/O pins and power pins. Doing so could cause damage to your Energy Probe or the power supply of your target.