Introduction#
Joulescope instruments are precision DC energy analyzers. They measure current and voltage, then compute power, energy and charge.
Many modern battery-powered and IoT devices have a high dynamic current range, which makes accurate measurement difficult. When “sleeping”, the devices consume nanoamps (nA) or microamps (µA), but when active, they consume milliamps (mA) or amps (A). Joulescope combines high-speed sampling and rapid dynamic current range switching to provide accurate and seamless current and energy measurements, even for devices with rapidly varying current consumption. Joulescope gives rapid feedback on how changes affect the overall product battery life.
Joulescope displays instantaneous voltage, current, power, and energy, like a multimeter. The multimeter provides a quick and easy summary of the present state of your device.
Joulescope also displays waveforms of voltage and current over time, like an oscilloscope. This oscilloscope view allows you to identify and to troubleshoot dynamic behavior and short events, including inrush current, event handlers, and tasks.
Applications#
Microprocessor and microcontroller power profiling and optimization
Hardware power optimization
Microcontroller and device sleep current optimization
Hardware and software troubleshooting
Software characterization and interrupt service routine profiling
USB inrush and suspend current pre-compliance testing
General-purpose current, voltage, power, charge, and energy measurement
Instruments#
Instrument |
Description |
|---|---|
Precision DC energy analyzer. |
|
Precision DC energy analyzer. |
|
A limited-edition, performance-enhanced version of the JS220 with ±1 nanoamp accuracy. |
|
The previous-generation Joulescope. |
See Products for the datasheets and user’s guides.
Software#
The Joulescope UI is the quickest and easiest way to use your Joulescope. It runs on Microsoft® Windows®, Apple® macOS®, and Linux®.
To automate tests or integrate Joulescope into a larger test setup, use the Joulescope Driver, a native C library with Python bindings, or the original pyjoulescope Python API. Joulescope recordings use the JLS file format.