Improve measurement quality
A water result may change a livestock or maintenance decision.
Use the whole card. The action stays attached to what must be observed and recorded, plus the nearest inference or action the current guidance cannot support.
Observe first
Check sample handling, reagent age, method range, first nonzero step, lighting, timing, calibration and reporting basis.
First action
Repeat the measurement with the method steps controlled and confirm the unit and basis before acting on a surprising result.
Record next
Record kit or meter, lot or calibration, sample, time, temperature, raw reading, interpreted result, range limit and repeat.
Stop boundary
Do not invent precision between colour blocks, copy the top of a range as an exact value or compare results with different chemical bases.
Continue with the governing guide
Improve measurement quality owns the complete method, evidence, limitations and revision history. This card introduces no separate biological claim.
Copy the complete card
Keep every part and both permanent links together.
Open the portable text version or open the complete visual card.
Copy the exact accessibility description
Use this complete description when a platform provides an alt-text field. Do not shorten away the stopping boundary.
Card version 1.0, reviewed 2026-08-12. This is a first-decision aid, not diagnosis, treatment authorization, emergency service or a complete method.