Temperature peak height and duration

Two events reaching the same maximum may not have the same product effect: height shows intensity, duration shows the time available for heat to reach the product.

8 July 2026Updated 28 September 2026

Short answer

Both matter: height shows the intensity of the event, duration shows the time heat has to reach the product. For each event, write down the maximum, the time above the limit, the recovery time and the product reading separately.

Two events reaching the same maximum may not have the same product effect. Say the air reaches 12 °C in both: one fades within two recording intervals, the other lasts two hours. The peak is the same but the heat the product takes in is not; because product responds more slowly than air, height and duration are read together.

For each event, four values are written down separately and the logger time is matched to the event record:

Maximum value
Time above the limit
Recovery time
Product reading

State the recording interval and any missing data as well. Brief peaks are not classed with continuous deviations, but repeated ones can point to an accumulating process problem and are handled by event frequency. After a deviation the product is not rejected automatically; it goes to quality review.