When assessing a thermal view during motion, distinguish movement of the phone from movement of the target. Changing both at once makes an unclear result harder to interpret and repeat.
Use a controlled observation sequence
| Observation | What it helps isolate |
|---|---|
| Stationary phone, stationary scene | Baseline view and saved output |
| Approved phone movement, stationary scene | What the operator sees while repositioning |
| Stationary phone, safely changing scene | Whether the required change is represented |
| Intended work sequence | Whether the accepted setup supports the actual task |
Have the responsible reviewer choose a harmless scene and an appropriate method. Do not create dangerous moving machinery or heating events to test a phone. Record the device, app mode, movement and relevant conditions so the supplier can interpret the example.
Avoid a single-cause conclusion
If the view jumps, smears or appears delayed, preserve the original observation and ask what evidence distinguishes image updates, detector response, movement and app processing. A frame-rate label alone does not diagnose the cause. A hand-held observation also should not be reported as a laboratory latency measurement.
The P20 Pro thermal specification graphic lists 25Hz refresh rate. This is a manufacturer entry, not a completed motion test. It does not establish an acceptable movement speed or a measurement result for a moving target.
Use the response-interval guide and the sample acceptance checklist to define what needs evidence. Send Phonemax the intended movement and output requirement before arranging a sample review. No motion or thermal-response trial is reported here.
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