This is a very important issue. If you need to monitor weeks of overland transportation over bumpy overland routes, or months of ocean transportation, you need more storage capacity than you would need for short-haul air transportation.

The duration for which the data logger can record depends on its storage capacity and the set measurement frequency.

The following is an example of the calculation of the duration of a climatic measurement record

In order to determine the recording duration of climate measurements (temperature, relative humidity, barometric pressure), it is necessary to divide the storage capacity (number of measured values in the data logger) by the measurement frequency.

Assumption: A temperature data logger has a storage capacity of 2 million measurements. If temperature values are measured and stored twice per minute, the storage capacity of the logger is sufficient to support up to 2 years of use.

2,000,000 measurements / (2 measurements x 60 minutes x 24 hours) = 694 days

This question is important because each object responds in a specific way to the stresses to which it is subjected. The amount of stress on a transportation item is directly dependent on the item itself. For example, if a sensitive medical device is being transported, even a minor shock can be critical, whereas when transporting a machine bed, the critical conditions are somewhat higher. For a shock to be critical, it must have a certain minimum acceleration and a minimum time during the shock. Criticality is different for each transportation item and depends on its individual state.

Basically, the mechanical stresses and the actual effects on the object should be determined by means of acceleration sensors in real (transportation) loading processes.

Will the cargo be monitored and transported by rail, road, water or air?Depending on the mode of transportation, cargoes are subject to different accelerations.If a truck needs to be monitored over a rugged overland route that lasts several weeks, or if it needs to be monitored over the course of several months of ocean freight, a larger storage capacity is required than for short-term air cargo.

In order to ensure that the data logger is carried in a meaningful way to recordLoad MultiplierThe sensor must be selected with the appropriate measurement range. The measuring range specifies the maximum value that can be recorded (e.g. ±15 g or ±200 g).The shock load is specified as a multiple of the acceleration due to gravity (acceleration due to gravity is g = 9.81 [m/s²]).The

For example, for monitoring pallet stacking, i.e., measuring minor shocks, a ±15 g sensor is usually sufficient. For more intense shocks, such as those that occur during unloading/loading into a truck or during shipping, it is often recommended to use a data logger with a ±200 g sensor and a high measurement rate to record shocks at a higher resolution. The measurement or sampling rate is the number of g measurements per unit time (usually per second in Hertz). The measurement rate determines the accuracy of the acceleration event.

In order to be able to accurately record transportation loads, it has been proven that the data logger should record more than 1,000 times per second in order to be able to plot the g-value curve well.Basically, the higher the measurement rate, the more accurately the actual processes and peaks are mapped. Basically, the higher the measurement rate, the more accurately the actual processes and peaks can be mapped. Of course, this is done on three geometrical spatial axes (x, y, z) in order to obtain acceleration values in all directions.