Use the Hioki LR8400 Memory HiLogger series to analyze the temperature difference between the external body and internal cavity of a refrigerator. Cold chain temperature management is particularly important for maintaining the integrity of storage systems for vaccines, perishables, and other temperature-sensitive products. The temperature of the refrigeration equipment at various internal and external points must be constantly monitored for sudden thermal excursions. Notwithstanding the multi-channel capabilities of the LR8400, the time scale axis of the data logger can be freely adjusted to display measured waveforms first as a trend in terms of seconds, then in terms of minutes, while still recording. Observe temperature changes from the very beginning and fast-forward to the present right on the screen.