143Appendix A Help GuideThe Help Guide is a step by step set of instructions for theDR 3900, for the execution of a stored program or procedure inaccordance with process specifications. The Help Guide isavailable for the most used HACH LANGE tests and the Hachpowder pillow reagent tests.A.1 Display of the Help Guide for stored programs1. Press Stored Programs in the Main Menu to view analphabetical list of stored programs with program numbers.Highlight the required test and press Start.2. Press the information icon.3. The first procedure step according to the selectedtest/method will be displayed.Note: Use the arrow keys to navigate through the next or previouspages or to the first or last page.4. Follow the step-by-step descriptions on the screen.5. If the method requires a timer, press Cancel and then pressthe timer icon.
