What we have written on the cold chain95 / 154

For readings near a limit, assess measurement point, instrument uncertainty and decision rule against the contract and procedure.

Assess sensor lag, sampling interval and mounting separately to test for brief peaks.

The cheapest way to build a 0 °C reference in the field is a properly made ice-water bath. It shows within minutes whether a thermometer has drifted, but it is a one-point intermediate check.

Do not treat EU 10/2011, LFGB and FDA as one certificate; verify market, article and use conditions.

A declaration of compliance identifies the material and states which food, for how long and at what temperature it may be used. Compare each line of it with your own use.

Cross-check measurement purpose and product needs against the full standard and model datasheet.

A new device, a changed probe, a fault or a repair all call for verification; the regular interval is set by the recorder owner and its client. The check compares the device with a working-standard thermometer.

EN 12830 defines the tests, performance and suitability of temperature recorders. When choosing a device, ask for the conformity declaration for the exact model and the edition it was assessed against.

An ATP certificate goes to the insulated body, not to the tractor. A body, semi-trailer, container or wagon each gets its own certificate, and the details sit on the ATP plate on the body.

A quote gives thickness in centimetres, but the result of insulation is measured by the K coefficient. How K differs from lambda and panel U, how it is used, and what to look for in a report.

The three letters of an ATP mark give, in order, the equipment type, the insulation level and the temperature class it can hold. What each letter means, the K-coefficient limits and the difference between FRC and FNA.

Link the time series to a calibrated device and product model; a chart alone does not set days remaining or release status.