The question is never ‘is it cold’
An auditor standing in front of a blood bank refrigerator is not really asking whether it is at the right temperature right now. The display answers that. They are asking whether you can demonstrate it has been at the right temperature continuously, that the alarm would have told you if it had not, and that someone competent has verified all of this on a defined schedule.
What tends to be requested
- An asset register listing every temperature-critical unit with make, model, serial number and location.
- Calibration certificates per asset, current and within the stated interval.
- Service records showing what was done, when, and by whom.
- Evidence that alarm and safety systems have been function tested, not merely present.
- Continuous monitoring records with no unexplained gaps.
- A defined maintenance and calibration schedule, and evidence it has been followed.
Where the gaps usually are
In our experience the equipment itself is rarely the problem. The problems are administrative: a certificate that expired four months ago and nobody noticed; a unit that was added to the lab and never added to the register; a monitoring record with a three-week gap where a logger battery died; a service that was carried out but never documented.
Every one of those is invisible until someone asks, and every one of them is trivially preventable with a schedule that is owned rather than remembered.
Build the record continuously
The practical fix is to stop treating documentation as an audit-preparation activity. If each maintenance visit produces a written report per asset, and each calibration produces a certificate per asset, and both happen on a schedule someone else holds, then the record assembles itself. Audit preparation becomes retrieval rather than reconstruction.
Ask your provider the direct question
Before booking calibration, ask exactly what documentation you will receive and what traceability applies to it. A provider who answers that clearly is one you can plan around. It is a fair question and it should get a straight answer — ask us and you will get one.
