# LI-300 and LI-350 Help Center
- [LI-300 and LI-350 Help Center](home.md): Product support landing page.
## Operating Instructions
- [Operating Instructions](manuals.md)
- [1. Introduction](topics/introduction.md)
- [2. Installing the Soil Probe](topics/installing-the-soil-probe.md)
- [3. Configuring the LI-300 (Analog)](topics/configuration-analog.md)
- [4. Configuring the LI-350 (SDI-12)](topics/configuration-sdi12.md)
- [5. Custom Calibration](topics/user-calibration.md)
- [6. Maintenance and Troubleshooting](topics/maintenance-troubleshooting.md)
- [7. Summary of Measurement Principles](topics/measurement-principles.md)
- [8. Specifications](topics/specifications.md)