1. Identify the sample
Record supplier, model, revision, serial or sample ID, date received, firmware or control version, battery marking, charger, accessories and visible differences. Photograph labels and retain the tested sample.
2. Fix the environment
Record ambient temperature and relative humidity, stabilization time, surface or fixture, measurement distance, instrument model and calibration status. Define whether the product is free-running, held or contacting a test surface.
3. Separate the measurements
| Measurement | Minimum record |
|---|---|
| Cooling plate | Starting temperature, time series, plate location, contact condition, mode and ambient data |
| Air speed / airflow | Instrument, distance, outlet position, direction, mode and averaging method |
| Noise | Sound metric, background, distance, orientation, room condition and mode |
| Electrical input | Voltage, current, power, charging state and measurement point |
| Runtime | Battery identity, starting charge, mode, interval, end condition and temperatures |
4. Repeat and report variation
One sample and one run cannot describe production variation. Agree on the number of samples and repetitions appropriate to the project. Report individual results, average where meaningful, range, anomalies and any failed runs instead of presenting only the best value.
5. Link results to approval
The approved specification should state which method and limit apply. Keep the golden sample, test record, critical-component list and change-control rule together. If a motor, battery, cooling module, heat sink or control setting changes, determine which tests and documents must be repeated.
Buyer acceptance checklist
- All samples are uniquely identified.
- Units and instruments are stated.
- Ambient and operating conditions are recorded.
- Pass/fail limits are agreed before the test.
- Failures and exclusions remain visible in the report.
- Results are not generalized to untested variants.