Day 36 — Temperature Gauge

What is the title of the Day 36 calibration infographic?

Temperature Gauge: How do we check a temperature gauge against a reference?[cite: 17

What learning journey series does this infographic belong to?

90-Day Calibration Learning Journey: Beginner to Calibration Specialist 2026[cite: 17

What page layout format is used for the Day 36 infographic?

Page 1/2 and Page 2/2[cite: 17

How is a temperature gauge defined in Section 1?

A temperature-measuring instrument that indicates temperature

How does the construction of a temperature gauge vary?

Its construction varies depending on the design and the manufacturer[cite: 17]

What specific type of dial gauge is illustrated as an example in Section 1?

A bimetallic dial gauge is shown as an example[cite: 17]

What is an indication defined as in the key terms table?

Displayed or pointed temperature[cite: 17]

What is a reference temperature defined as in the key terms table?

Value from a suitable calibrated reference[cite: 17]

How is error defined in the key terms table?

Indication minus reference[cite: 17]

How is correction defined in the key terms table?

Reference minus indication[cite: 17]

What is a scale interval defined as in the key terms table?

Difference between adjacent scale marks[cite: 17]

What is a tolerance or specification defined as in the key terms table?

Allowed limit set by the applicable requirement[cite: 17]

What are the common temperature gauge designs covered in Section 3?

Bimetallic dial thermometers

How does a bimetallic dial thermometer operate?

It uses the different expansion of bonded metals to move a pointer on a dial[cite: 17]

How does a filled-system thermometer operate?

It uses a temperature-dependent response of a filled system such as liquid or gas[cite: 17]

What components make up a remote-reading sensor-and-indicator system?

A temperature sensor like an RTD or thermocouple with a separate indicator[cite: 17]

What must a technician confirm before choosing a calibration method?

The actual construction and model[cite: 17]

What equipment setup is shown in Section 4 for a typical comparison?

A temperature source such as a stirred bath or suitable source

How should the sensing portions be positioned within the temperature source?

At suitable and comparable positions in the temperature source[cite: 17]

What does the suitability of a typical comparison setup depend on?

Its suitability depends on the specific model and applicable procedure[cite: 17]

What is the first step in the pre-calibration checks checklist?

Identify make

What physical components of the gauge must be inspected during pre-calibration?

The pointer

What documentation must be obtained prior to calibration?

Manufacturer specification and approved procedure[cite: 17]

What must be verified regarding the reference standard and temperature source?

Check the reference thermometer and source suitability[cite: 17]

What operational parameters must be planned ahead for the setup?

Plan test points and safe setup parameters including mounting

What warning is given when no specific gauge model is provided?

Do not assume a universal accuracy limit

What reference temperature value R is used in the illustrative worked example?

100.0 degrees Celsius[cite: 18]

What gauge indication value I is used in the worked example?

102.0 degrees Celsius[cite: 18]

How is the error calculated in Step 1 of the worked example?

Indication minus reference which equals +2.0 degrees Celsius[cite: 18]

How is the correction calculated in Step 2 of the worked example?

Reference minus indication which equals -2.0 degrees Celsius[cite: 18]

What is the technical interpretation of the worked example result?

The gauge indicates 2.0 degrees Celsius higher than the reference at this point[cite: 18]

What is the corresponding correction value for the worked example point?

The correction is -2.0 degrees Celsius[cite: 18]

Does a single calibration point establish overall acceptance or rejection?

No

What additional factors are required to make a conformity decision?

The applicable specification

What does measurement uncertainty depend on according to Section 7?

The instrument

What is the first common uncertainty contributor listed in Section 7?

Reference temperature calibration uncertainty[cite: 18]

What does reference temperature calibration uncertainty cover?

The accuracy and stability of the reference thermometer[cite: 18]

What is the second uncertainty contributor listed?

Temperature source stability and uniformity[cite: 18]

What does temperature source stability and uniformity involve?

Variation and gradients in the bath or source[cite: 18]

What is the third uncertainty contributor listed?

Gauge resolution or readability[cite: 18]

What does gauge resolution or readability represent?

The smallest scale division or dial resolution[cite: 18]

What is the fourth uncertainty contributor listed?

Repeatability[cite: 18]

What does repeatability account for in calibration?

Variation in repeated readings[cite: 18]

What is the fifth uncertainty contributor listed?

Installation or immersion effects[cite: 18]

What do installation and immersion effects involve?

Correct insertion depth

What is the sixth uncertainty contributor listed?

Hysteresis where relevant[cite: 18]

What does hysteresis describe in temperature gauges?

The difference between increasing and decreasing temperature[cite: 18]

How must these uncertainty factors be combined to obtain final uncertainty?

Use the combination of these factors with the GUM to obtain the measurement uncertainty[cite: 18]

What is the first common mistake listed in Section 8?

Using one method for all temperature gauges such as bimetallic

What is the second common mistake listed?

Wrong immersion depth or installation position[cite: 18]

What is the third common mistake listed?

Taking readings before stabilization[cite: 18]

What is the fourth common mistake listed?

Confusing error with correction[cite: 18]

What is the fifth common mistake listed?

Ignoring the manufacturer's specification or applicable procedure[cite: 18]

What is the sixth common mistake listed?

Assuming one passing point ensures the whole range is OK[cite: 18]

What is the seventh common mistake listed?

Calibrating only the display and not the actual sensing element[cite: 18]

What is the first item in the practical tips and checklist in Section 9?

Identify the gauge type

What is the second item in the practical checklist?

Inspect the dial

What is the third item in the practical checklist?

Use a suitable reference and temperature source[cite: 18]

What is the fourth item in the practical checklist?

Follow the correct insertion and immersion requirements[cite: 18]

What is the fifth item in the practical checklist?

Allow adequate stabilization time[cite: 18]

What is the sixth item in the practical checklist?

Record readings at specified points including increasing and decreasing if required[cite: 18]

What is the seventh item in the practical checklist?

Calculate error

What is the eighth item in the practical checklist?

Compare with applicable specification and decision rule[cite: 18]

What is the final item in the practical checklist?

Document results and any observations[cite: 18]

What is the technical question in the Your Turn Calibration Challenge?

If the reference temperature is 120.0 degrees Celsius and the gauge indicates 118.5 degrees Celsius

What is the correct answer to the technical challenge question?

The error is -1.5 degrees Celsius and the correction is +1.5 degrees Celsius[cite: 18]

What is the witty question presented in the calibration challenge?

Why did the temperature gauge break up with the thermometer?[cite: 18]

What is the witty answer provided in the challenge?

It felt like it was always getting compared[cite: 18]

What is the practical scenario question in the calibration challenge?

The gauge shows unstable readings during operation

what would you check first?[cite: 18]

What standards and references are listed at the bottom of the infographic?

ASME B40.200 Thermometers Direct Reading and Remote Reading