5.5 Uncertainty

I declare: solidlikelyshaky

1. Read an instrument’s accuracy on its datasheet (± % of reading ± digits) and calculate a measurement’s uncertainty.
2. Explain the difference between resolution and accuracy with a multimeter example.
3. Recognize a method error: the instrument loads the circuit, the ground shifts the zero, the probe adds capacitance.
4. Check a multimeter against a voltage reference or another instrument and know when to doubt which.
5. Keep a measurement notebook: conditions, instrument, range, date, and what surprised you.
6. Diagnosis: two instruments that disagree, say which to believe and why, with each one’s datasheet.