A device clock offset can misalign a temperature record with an event.

Evidence file

  • Reference date and time
  • Timezone
  • Logger offset
  • Correction record

State the method first

Do not confuse download time with measurement time; preserve the raw file unchanged.

Verify events

Link device, route and event IDs; document the conversion if corrected.

If an offset is unknown, do not assume event order; note the uncertainty in the review record.