Veteran users know that the maintenance tables in the gfs-3000 manual (Chapter 11) are the key to a 10-year instrument life.
When your data looks wrong, the gfs-3000 manual includes a comprehensive troubleshooting appendix (Appendix F). Here are the top three problems and the manual's solutions.
Manual solution (Page 89): Your cuvette is leaking. Perform a "leak test." Seal the cuvette with a blank (solid plate). Inject 1000 ppm CO₂. If the reading drops >10 ppm per minute, replace the gasket or tighten the cuvette screws.
