Revision 1.3 Joulescope JS220 User’s Guide Page 28 / 51
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Note that the V- wire is connected to PS- and T-. It does not connect to PS+. This setup configures the
Joulescope JS220 in high-side current sense configuration.
If you are familiar with the previous-generation Joulescope JS110, this configuration is the exact same as
connecting IN+ to PS+, IN- to PS-, OUT+ to T+, and OUT- to T-. The FP02-BNA front panel provides
the JS220 with the exact same connections as the JS110.
The JS220 can alternatively be used to measure current on the low-side wire connected to PS-.
9.4. Measure target device consumption
The JS220 can measure the current, voltage, power, charge, and energy consumed by a target device.
The JS220 and wires all have resistance (impedance). When current flows, this resistance causes a
voltage drop according to Ohm’s Law: V = I * R. While this energy is provided by the power source, it is
consumed by the connections between the power source and the target device under test. This loss
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