The brewing or water contact time is primarily determined by the grind size and bed depth. A longer brew time is required for the water to penetrate the larger grind particles.
The recommended brewing contact times for each grind size are shown here.
Brewer Cycle Timing Your equipment's brew cycle delivery time assists in determining the recommended coffee grind to produce a perfect cup. Experiment with a coarser or finer grind to attain the flavor profile you prefer for your coffee.
Bed Depth The ideal depth of the coffee bed in the brew basket is 1-2 inches (2.54-5.08 cm). If your coffee bed is less than 1 inch, the water may move through it too quickly and under-extract. Water moving too slowly through a bed depth of more than 2 inches (5.08 cm) may cause overextraction and a bitter taste.
