Day 39 - Temperature Uncertainty

What is the title of the Day 39 calibration infographic?

TEMPERATURE UNCERTAINTY: It's not just a number — it's a range of possible values.[cite: 21

What learning journey series does Day 39 belong to?

Continuing my 90-Day Calibration Learning Journey: Beginner to Calibration Specialist (2026)[cite: 21

What is temperature measurement uncertainty defined as?

A non-negative parameter that characterizes the dispersion of values reasonably attributable to the measurand

What example is provided for a temperature measurement result with uncertainty?

t = (100.00 ± 0.20) °C[cite: 21]

What does the 0.20 degrees Celsius represent in the temperature uncertainty example?

The stated uncertainty

What guide is referenced for temperature measurement uncertainty in Section 1?

JCGM 100:2008 (GUM)[cite: 21]

What are the two types of uncertainty evaluation described in Section 2?

Type A and Type B[cite: 21]

How is Type A evaluation conducted?

Evaluated by statistical analysis of measurement data

How is Type B evaluation conducted?

Evaluated using other information

What common uncertainty sources are listed in Section 3?

Reference thermometer

What practical example is given for the reference thermometer uncertainty source?

Uncertainty stated on its calibration certificate[cite: 21]

What practical example is given for repeatability uncertainty?

Variation between repeated readings[cite: 21]

What practical example is given for resolution uncertainty?

Limited display increments[cite: 21]

What practical example is given for stability uncertainty?

Temperature changes during the measurement period[cite: 21]

What practical example is given for uniformity uncertainty?

Temperature differences within the measurement zone[cite: 21]

What practical example is given for immersion and heat conduction uncertainty?

Heat transfer along the probe stem[cite: 21]

What practical example is given for environmental influence uncertainty?

Ambient conditions affecting the setup[cite: 21]

What practical example is given for drift uncertainty?

Change in the instrument or reference over time[cite: 21]

Which guide specifically addresses dry block calibrator uncertainty sources like reference uncertainty

resolution

What standard uncertainty values are given in the Section 4 worked example?

Reference thermometer: 0.10 degrees Celsius

What mathematical method is used to combine standard uncertainties in Section 4?

Root-sum-of-squares (RSS) formula: u_c = sqrt(u_1^2 + u_2^2 + u_3^2)[cite: 21]

What is the calculated combined standard uncertainty (u_c) in the Section 4 worked example?

Approximately 0.14 degrees Celsius (sqrt(0.0209))[cite: 21]

What is the expanded uncertainty (U) calculated using a coverage factor k = 2 in Section 4?

U = k * u_c = 2 * 0.14 ≈ 0.28 degrees Celsius[cite: 21]

What authoritative references are listed in Section 5 and Section 10?

EURAMET Calibration Guide No. 13 Version 4.0 (09/2017)

What are the steps for building an uncertainty budget outlined in Section 6?

1. Identify sources

Why does uncertainty matter according to Section 7?

Supports reliable results

What core reminder is highlighted in Section 7 and Section 8?

Uncertainty is not an error

it's a statement of confidence[cite: 22]

What does a measurement result with an uncertainty statement look like on Page 2 (Section 8)?

t = (100.00 ± 0.28) °C (k = 2

What should always be stated regarding expanded or standard uncertainty in reporting?

State whether the uncertainty is expanded or standard

Does a more precise display (e.g.

two decimal places) mean a smaller uncertainty?

What does Type A evaluation use?

Statistical analysis of data such as repeated readings[cite: 22]

What does Type B evaluation use?

Other information such as certificates

What are the main contributors in temperature calibration highlighted in Section 9?

Reference thermometer

How should independent standard uncertainties be combined?

Using the root-sum-of-squares (RSS) method[cite: 22]

How should results with uncertainty be reported?

Report with expanded uncertainty and coverage factor following EURAMET

Who created the Day 39 infographic?

Jan Caspar Esguerra in 2026[cite: 21

What hashtags are associated with the Day 39 infographic?

#Calibration #Metrology #TemperatureCalibration #MeasurementUncertainty #ISO17025[cite: 21