Day 35 — Industrial Thermometer

What is the title of the Day 35 calibration infographic?

INDUSTRIAL THERMOMETER What exactly are we calibrating?[cite: 15

What learning journey series is this infographic part of?

Continuing my 90-Day Calibration Learning Journey Beginner to Calibration Specialist 2026[cite: 15

What is an industrial thermometer?

An instrument for measuring temperature in industrial applications[cite: 15

What does a sensor do in a measurement system?

Detects temperature and converts it to a signal[cite: 15

What is the function of an indicator or readout?

Displays the measured value[cite: 15

How is calibration defined according to VIM 2.39?

Establishes the relationship between reference values and indications[cite: 15

What is accuracy defined as in the key terms?

Closeness of indication to the true value involves uncertainty[cite: 15

What is resolution?

Smallest detectable change in temperature[cite: 15

What is the range of a thermometer?

Minimum and maximum measurable temperature[cite: 15

What are the four common types and principles of industrial thermometers listed?

Bimetallic dial

What does a bimetallic dial use?

A bimetal strip that moves a pointer and is common in process and HVAC systems[cite: 15

What does a filled-system thermometer use?

A fluid-filled system and pressure change suited for remote and high-temperature use[cite: 15

What does a liquid-in-glass thermometer use?

Liquid expansion in a glass tube suited for low to medium temperature ranges[cite: 16]

What does a sensor and readout system use?

RTD

What does the calibration method depend on?

Instrument design

What equipment is shown in the typical measurement setup?

Reference thermometer

What are the applicable standards and guidance listed?

ASME B40.200

What do specific requirements depend on according to panel five?

Manufacturer's manual

What is the given reference temperature and thermometer indication in the worked example?

Reference temperature is 100.0 degrees Celsius and thermometer indication is 102.0 degrees Celsius[cite: 16]

What is the calculated error in the worked example?

Error equals +2.0 degrees Celsius[cite: 16]

What is the calculated correction in the worked example?

Correction equals -2.0 degrees Celsius[cite: 16]

What is the interpretation of the worked example result?

The thermometer indicates 2.0 degrees Celsius above the reference at this point and a correction of -2.0 degrees Celsius would be applied[cite: 16]

What does the worked example calculation not establish by itself?

Acceptance or rejection

What uncertainty contributors are listed in panel seven?

Reference thermometer calibration uncertainty

How is the combination of uncertainty factors evaluated?

Using an appropriate method such as the GUM to obtain measurement uncertainty[cite: 16]

What common mistakes are outlined in panel seven?

Using the wrong calibration method

What are the practical applications of industrial thermometers listed in panel eight?

Industrial process monitoring

What is the first step in the technician checklist?

Identify the instrument type

What is the second step in the technician checklist?

Inspect physical condition including dial

What is the third step in the technician checklist?

Use an appropriate calibrated reference and temperature source[cite: 16]

What is the fourth step in the technician checklist?

Follow manufacturer's insertion/immersion and setup requirements[cite: 16]

What is the fifth step in the technician checklist?

Allow adequate stabilization time[cite: 16]

What is the sixth step in the technician checklist?

Record readings at specified test points including increasing and decreasing if required[cite: 16]

What is the seventh step in the technician checklist?

Calculate error

What is the eighth step in the technician checklist?

Compare with applicable specification and apply the decision rule[cite: 16]

What is the ninth step in the technician checklist?

Document results and any observations[cite: 16]

What is the technical question in the calibration challenge?

If the reference temperature is 80.0 degrees Celsius and the indication is 78.5 degrees Celsius

What is the answer to the technical question in the challenge?

Error equals -1.5 degrees Celsius and correction equals +1.5 degrees Celsius

What is the witty question in the calibration challenge?

Can a thermometer be confidently wrong?[cite: 16]

What is the practical question in the calibration challenge?

During a temperature rise and fall

what would you investigate before reporting?[cite: 16]

What references are cited for Day 35?

NIST Industrial Thermometer Calibrations