Start with the measurement claim the report makes
Identify whether the report presents a qualitative thermal observation, an apparent temperature, a reviewed surface-temperature estimate or a comparison between selected regions. These claims need different supporting context. Do not turn a color difference into a precise temperature difference unless the actual measurement record supports it. State the object, physical location, capture identifier and result definition before adding a conclusion. A dramatic image can be useful evidence while still requiring careful qualification of its numerical meaning.
The worksheet connects the actual measurement to the information used by the responsible thermography process. It does not calculate emissivity, determine safe access or diagnose a failure mechanism from a thermal pattern. The reporting task is to preserve what was observed and how the supplied values were obtained. Where the evidence supports only a qualitative observation, retain that scope instead of adding decimal temperatures to make the report appear more complete.
Distinguish original radiometric evidence from presentation images
Identify the original file supplied by the examination system and the actual data it contains. A screenshot, pasted image or ordinary exported picture may preserve the visible palette and annotations without retaining the information needed to revisit the measurement. Keep the original reference separate from the presentation image used in a report. Do not promise that a recipient can remeasure temperatures from a graphic unless its actual format and retained data support that function.
Preserve the relationship between the capture file, analysis version and delivered image. A renamed export should remain traceable to its source rather than becoming an apparently independent acquisition. If only a picture is available, record that limitation and avoid reconstructing values from colors or an unreadable legend. A clear evidence inventory is more useful than a collection of attractive images whose measurement origin cannot be recovered by the reviewer.
Define the spot, area or statistic behind each value
A spot reading, maximum within a selected box and average of a region are not interchangeable. Identify the actual measurement tool, its position and the reported statistic. FLIR’s measurement-tool documentation describes spot and area tools, including selectable maximum, minimum and average results. That product example illustrates why a report needs the selection context; it does not prescribe which statistic is appropriate for another examination.
Keep the physical object and the selected image region connected. A box that includes background, adjacent material or reflections can represent a different population from a tightly defined feature. Preserve the actual reviewed selection and any stated limitation. If the selection changes during analysis, record the new version and the reason rather than silently replacing a value while retaining an image of the earlier region. The displayed annotation and result table should describe the same measurement.
Preserve actual radiometric inputs and their provenance
Record the relevant input values supplied by the examination record and identify their basis. A value selected from a material list, entered from a project instruction or established by a documented field method should not be described as independently measured without evidence. Keep the distinction between input, assumption and observation visible. Do not choose a convenient value merely to make a reported temperature agree with an expected result or another instrument reading.
The FLIR radiometry explanation for Lepton identifies target characteristics, environment and radiometric parameters as contributors to measurement context. Its model-specific settings and accuracy figures are not universal instructions for all cameras. Use the actual camera documentation and responsible examination process for technical decisions. The workpaper preserves those decisions and references without supplying default emissivity, conversion factors or a claimed measurement accuracy.
Keep reflected-temperature and ambient records distinct
Do not combine different temperature inputs under one generic environment column. Preserve the actual field names and definitions used in the source analysis. A recorded air temperature and a reflected-temperature input serve different roles and should remain distinguishable. If the source record contains only one, do not populate the other by assumption. Missing information should remain a review question rather than being concealed by copying a plausible number across several fields.
Where a reviewer changes an input, identify whether the change applies to the whole image or only a specific measurement region. Some systems permit local parameter choices, so a single image-level note may not explain every reported value. Retain the actual scope of the change and the resulting analysis version. This prevents a table from mixing values produced under different assumptions while suggesting that all measurements share one uniform calculation basis.
Record the optical path and target visibility
Preserve the actual lens, window or other relevant optical-path information identified by the examination team. A view through an infrared window is not the same record context as an unobstructed view of the object. Do not infer an applicable transmission correction from the fact that a window is present. Reference the actual configuration and the responsible treatment of its effect. The report preparer should not create a correction factor or assume that every window behaves alike.
Record limitations caused by partial visibility, obstruction or an uncertain target boundary as supplied by the examination. A small visible area does not automatically represent the hidden part of a component. Keep the physical viewing position and the image reference clear enough for later comparison. The worksheet describes the evidence obtained from the authorized view; it is not an instruction to remove guards, open energized equipment or alter a safe working arrangement.
Connect the thermal observation to actual operating context
Identify the capture time and the relevant operating condition actually known at that time. A thermal image taken during startup may not be directly comparable with one from a stable operating period. Preserve the source of any load, process or environmental information rather than assuming normal operation because the equipment was running. If the condition was not recorded, state the limitation and avoid a comparison that depends on a value the team cannot substantiate.
Separate observation from cause. A warmer area may justify review, but the image alone does not establish a loose connection, blocked flow, internal damage or another specific mechanism. Use the responsible interpretation and supporting evidence when a cause is stated. The report can identify an unresolved thermal anomaly and request appropriate follow-up without turning a screening observation into a confirmed diagnosis or a maintenance instruction unsupported by the examination record.
Keep palette and scale changes out of temperature trends
A different palette or display span can make the same measurement appear more or less striking. Preserve the actual scale and unit labels on presentation images where needed for interpretation. Do not infer a temperature trend from the proportion of red pixels in two differently displayed images. A comparison needs the underlying reviewed values and a supported relationship between the selected objects, measurement context and operating conditions.
If a report uses a common display scale to aid presentation, record that it is a presentation choice. It does not by itself establish comparable acquisition conditions or measurement accuracy. Conversely, images with different display ranges may still contain useful numerical evidence if the actual measurement relationship is sound. Keep the visual communication decision separate from the technical basis for comparing temperatures so a reader does not mistake graphic consistency for verified equivalence.
Worked example: a revised box changes the reported maximum
In a fictional inspection, image T17 has a box around a small component and part of the surrounding background. A draft report lists the box maximum as the component temperature. During review, the analyst identifies that the selected region includes a different feature and creates a revised measurement selection. The final record links the revised result to its actual area and preserves the earlier analysis as superseded. It does not describe the numerical change as cooling of the component.
The example illustrates a reporting distinction, not a recommended measurement technique or alarm limit. The capture occurred once; the analysis selection changed later. A recipient should be able to see that sequence without assuming that two temperatures represent two examinations. If the original radiometric data were unavailable, the team would need to describe that limitation rather than invent a corrected measurement from a presentation picture alone.
| Item | Meaning to preserve | Review action | Avoid |
|---|---|---|---|
| Capture T17 | Original examination event and file | Confirm object, time and source | Treating every export as a new capture |
| Box B1 | Original selected population | Retain superseded analysis reference | Calling its maximum a different feature’s temperature |
| Box B2 | Revised reviewed selection | Link value and image annotation | Calling analysis change physical cooling |
| Final observation | Supported result and limitations | State actual review conclusion | Inferring a failure cause from color alone |
Make comparative measurements explicit
When reporting a temperature difference, identify both operands and how they were obtained. A comparison against another component, a previous survey or a fixed reference has a different meaning. Preserve the actual reference location, capture and operating context. Do not present a difference as a measured physical change if one side is an assumed baseline or if the selected regions are not comparable. The technical reviewer determines whether the comparison supports the intended conclusion.
Keep the units and statistic consistent with the source. An area average should not be subtracted from a spot maximum without a stated and justified purpose. If a unit conversion or derived difference is included, retain the reviewed calculation basis and distinguish it from directly reported values. The workpaper does not automatically calculate thermal severity or apply maintenance thresholds. It records the evidence and the actual authorized assessment used by the project.
Preserve review changes without rewriting acquisition history
Record whether a changed value resulted from a corrected input, different measurement region, unit correction or new examination. These are separate events. Keep the original capture date and the later review date distinct, together with the actual reason and responsible assessment. Do not assign the review date as a new acquisition date or remove a material change from the delivery history because the final image looks similar to the original.
Where a revised report changes a client-facing conclusion, identify the affected item and superseded result clearly. A recipient should not have to compare every image manually to discover the change. Preserve the actual distribution record in the project’s communication process. The reporting workspace does not automatically notify recipients or establish an approval signature, so those responsibilities need their own confirmed completion evidence outside a document-status label.
Use the free workspace for reviewed records and references
The digital reporting workspace can hold the measurement-context table, reviewed observations and external file references. Supported DOCX and XLSX tables can be imported after preview. It does not parse native radiometric images, recompute temperatures or attach examination photographs through its logo controls. Keep original images and analysis files in the agreed external package, and use the report to identify exactly which files support each result.
The equipment tracker and calibration reminder help organize entered camera identifiers and dates. They do not establish measurement validity. Use the quote comparison tool to compare actual proposals that state required radiometric deliverables and operating-context records. The thermal-camera file guide can support those procurement questions without implying that every camera or file format offers the same functions.
Keep precision consistent with the supplied evidence
Preserve the reviewed rounding and qualification of reported temperatures. Extra decimal places produced by a spreadsheet do not establish better measurement certainty. If the source assessment includes a limitation or uncertainty statement, carry its relevant meaning into the report rather than retaining only the central value. Do not create an uncertainty estimate from the camera model name or copy a brochure figure into every result. The responsible measurement process determines what precision and qualification are justified for the actual examination conditions.
Check the recipient can understand one value without guessing
Select one reported temperature and trace it to the actual capture, selected region, statistic, relevant inputs and operating context. Confirm that the image annotation and table agree. Then select a comparison and verify that both references are identifiable and the conclusion does not exceed the evidence. This check is stronger than confirming that every image has a logo and a temperature scale, because those presentation details do not establish measurement provenance.
Replace the fictional worksheet row with actual reviewed information and retain any unresolved input or visibility limitation. Use the inspection report buyer-review guide for broader handover checks. A useful thermal report makes its measurement claims understandable and retrievable. It does not equate a colorful picture with a quantitative assessment, suggest that a document editor diagnoses equipment or hide uncertainty behind an unsupported number of decimal places.
Thermal measurement-context worksheet
Download this editable CSV for the task described above. Replace illustrative prompts with your own supported facts. The worksheet is a planning aid; it does not establish inspection acceptance or approval.
Download the free workflow worksheetQuestions about this workflow
Can a thermal screenshot always be used to remeasure temperature?
No. A presentation image may lack the original radiometric information. Preserve the actual source file and state what data remains available.
Does a red region prove a particular equipment fault?
No. Preserve the actual measurement, operating context and responsible interpretation. Color alone does not establish a failure mechanism.
Should ambient and reflected-temperature inputs be combined?
No. Keep the source field definitions and actual values separate. Do not copy one into the other without a supported technical basis.
Can NDT Connect recalculate radiometric image temperatures?
No. The workspace records supplied text and Office tables. Radiometric processing and technical interpretation stay in the appropriate examination software and review process.
Sources and editorial scope
Primary references support the specific context cited in the guide. Worked examples and suggested workflows are NDT Connect editorial guidance. Confirm the documents and authority applicable to the actual assignment.
More guides: method-specific report workpapers
- Describe TOFD Coverage Limitations in a Report
Make the boundaries of a TOFD examination understandable without borrowing generic dead-zone dimensions or treating a supplementary test as automatic proof of complete coverage.
- Document Unreliable UT Thickness Readings and Follow-Up
An unstable or unsupported thickness value should not become a final reading simply because a table needs a number. Preserve the location and evidence, describe the uncertainty and record the responsible review or follow-up decision.
- Record UT Weld Indication Coordinates Clearly
A coordinate is useful only when its origin, direction, units and physical meaning are defined. Record UT indication locations so a reviewer can connect instrument quantities with the correct weld and examination event.
- Record VT Access, Viewing Conditions and Limitations
A visual examination report should identify what the examiner could assess and the conditions supporting that assessment. Preserve the actual view, surface state and limitations instead of treating a photograph or completed checklist as proof of unrestricted access.
