An early-ending file does not show the remaining temperatures. Compare its last reading with delivery and return times in the same time zone.
Possible causes
- A user may have stopped recording or removed the device.
- A duration or memory setting may have ended the file.
- Power, device, connection or download issues may be involved.
Separate the possibilities
If devices end after the same elapsed time, check settings and memory. If endings cluster on one device, check battery status, warnings and errors against its manual. If the timestamp aligns with first delivery, check the record and placement; a match does not prove cause.
Placement and handling record
If the device left with a delivered item, check delivery sequence and placement instructions. Use the manual for stop and alarm behavior.
Battery in cold conditions
Low temperatures can affect battery performance, but an early ending is not a diagnosis. Check indicator, warnings, error and use history against the manual.
A file's final timestamp shows the interval to investigate, not its cause.
Monthly review
List device ID, model, first and final readings, run return and errors. Repeated patterns guide checks.
Match file closure to the run sheet. Compare file end and run return in the same time zone. Apply the site's review rule instead of a universal minute threshold.
