# Joulescope JS110 User’s Guide  **Precision DC Energy Analyzer** Revision 2.0, last revised 2026 October 26.  * [Overview](https://docs.joulescope.com/en/products/js110/guide/overview.md) * [Affordable, easy-to-use, accurate and precise](https://docs.joulescope.com/en/products/js110/guide/overview.md#affordable-easy-to-use-accurate-and-precise) * [Key benefits](https://docs.joulescope.com/en/products/js110/guide/overview.md#key-benefits) * [Key features](https://docs.joulescope.com/en/products/js110/guide/overview.md#key-features) * [What comes in the box](https://docs.joulescope.com/en/products/js110/guide/overview.md#what-comes-in-the-box) * [Meet Your Joulescope](https://docs.joulescope.com/en/products/js110/guide/meet.md) * [Quick start](https://docs.joulescope.com/en/products/js110/guide/quick_start.md) * [Specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md) * [Absolute maximum ratings](https://docs.joulescope.com/en/products/js110/guide/specifications.md#absolute-maximum-ratings) * [Mechanical](https://docs.joulescope.com/en/products/js110/guide/specifications.md#mechanical) * [Recommended operating conditions](https://docs.joulescope.com/en/products/js110/guide/specifications.md#recommended-operating-conditions) * [Specification conditions](https://docs.joulescope.com/en/products/js110/guide/specifications.md#specification-conditions) * [Current measurement specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md#current-measurement-specifications) * [Voltage measurement specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md#voltage-measurement-specifications) * [General specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md#general-specifications) * [Parasitic effects specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md#parasitic-effects-specifications) * [Software-controlled fuse specifications](https://docs.joulescope.com/en/products/js110/guide/specifications.md#software-controlled-fuse-specifications) * [General purpose inputs and outputs](https://docs.joulescope.com/en/products/js110/guide/specifications.md#general-purpose-inputs-and-outputs) * [Host software](https://docs.joulescope.com/en/products/js110/guide/host_software.md) * [Installation](https://docs.joulescope.com/en/products/js110/guide/host_software.md#installation) * [Multimeter view](https://docs.joulescope.com/en/products/js110/guide/host_software.md#multimeter-view) * [Oscilloscope view](https://docs.joulescope.com/en/products/js110/guide/host_software.md#oscilloscope-view) * [Energy and Charge](https://docs.joulescope.com/en/products/js110/guide/host_software.md#energy-and-charge) * [Open-source](https://docs.joulescope.com/en/products/js110/guide/host_software.md#open-source) * [Theory of operation](https://docs.joulescope.com/en/products/js110/guide/theory.md) * [Ammeter](https://docs.joulescope.com/en/products/js110/guide/theory.md#ammeter) * [Voltmeter](https://docs.joulescope.com/en/products/js110/guide/theory.md#voltmeter) * [Host Computer](https://docs.joulescope.com/en/products/js110/guide/theory.md#host-computer) * [Power, Energy, Charge, and Statistics](https://docs.joulescope.com/en/products/js110/guide/theory.md#power-energy-charge-and-statistics) * [High impedance / low leakage](https://docs.joulescope.com/en/products/js110/guide/theory.md#high-impedance-low-leakage) * [Electrical isolation](https://docs.joulescope.com/en/products/js110/guide/theory.md#electrical-isolation) * [How to swap the front panel](https://docs.joulescope.com/en/products/js110/guide/front_panel.md) * [GPI & GPO](https://docs.joulescope.com/en/products/js110/guide/gpio.md) * [Electrical Isolation](https://docs.joulescope.com/en/products/js110/guide/isolation.md) * [Typical Behavior](https://docs.joulescope.com/en/products/js110/guide/typical_behavior.md) * [Step Response](https://docs.joulescope.com/en/products/js110/guide/typical_behavior.md#step-response) * [Compliance](https://docs.joulescope.com/en/products/js110/guide/compliance.md) * [United States](https://docs.joulescope.com/en/products/js110/guide/compliance.md#united-states) * [Europe](https://docs.joulescope.com/en/products/js110/guide/compliance.md#europe) * [Safety](https://docs.joulescope.com/en/products/js110/guide/compliance.md#safety) * [RoHS Directive 2011/65/EU, 2015/863/EU](https://docs.joulescope.com/en/products/js110/guide/compliance.md#rohs-directive-2011-65-eu-2015-863-eu) * [Country of origin](https://docs.joulescope.com/en/products/js110/guide/compliance.md#country-of-origin) * [Maintenance](https://docs.joulescope.com/en/products/js110/guide/maintenance.md) * [Verification Procedure](https://docs.joulescope.com/en/products/js110/guide/maintenance.md#verification-procedure) * [Troubleshooting](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md) * [The Joulescope UI is not working as expected](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#the-joulescope-ui-is-not-working-as-expected) * [JS110 is not recognized by the host computer](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#js110-is-not-recognized-by-the-host-computer) * [Offset error](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#offset-error) * [Unable to measure the full voltage range](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#unable-to-measure-the-full-voltage-range) * [Unable to open in Joulescope UI](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#unable-to-open-in-joulescope-ui) * [Inaccurate measurements in the presence of strong RF](https://docs.joulescope.com/en/products/js110/guide/troubleshooting.md#inaccurate-measurements-in-the-presence-of-strong-rf) * [Warranty](https://docs.joulescope.com/en/products/js110/guide/warranty.md) * [Change log](https://docs.joulescope.com/en/products/js110/guide/changelog.md)