When the number distracts the trainee
Coach a trainee to interpret TDS together with ratio, beverage mass, and taste.
A trainee wants to change grind because TDS is high. Pick the line that teaches the control-chart relationship. The trainee points at a high TDS reading. High TDS means we over-extracted, right? fromTop You need to coach the number without dismissing it. fromBottom TDS tells us strength. To judge extraction, pair it with dose, beverage mass, ratio, and how the cup tastes. Strong. It keeps the measurement useful and teaches the full extraction-strength relationship. Yes, any high TDS reading means the grind is too fine. Wrong principle. High strength can come from ratio, yield, or dilution choices, not only over-extraction.…
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