As the SmartHub and the SmartLock measure the outside temperature and humidity, it is not not necessary to calibrate them.
Both devices function as gateway systems, facilitating the transmission of measured data from the Temp-/CryoBeacons to the Tec4Cloud. It is important to note that they do not possess the capability to measure the internal temperature of the load; this role is specifically fulfilled by the Temp-/CryoBeacons, which we recalibrate annually to ensure accuracy. Furthermore, the SmartHub and SmartLock are relatively large, requiring significant space in the calibration bath during the calibration process. This, in turn, increases the overall cost of calibration.
The SmartHub / Lock is either intended to be used as a gateway in warehouse scenarios or as data logger outside of a shipper that only measures the outside temperature, but not the temperature in the payload area.
For that reason we do not see value in calibrating the device.
- In a warehouse scenario, it is advisable for the gateway to remain stationary within the warehouse environment, allowing for the seamless exchange of Beacons to ensure continuous monitoring. Consequently, if any measuring point is absent, we recommend simply adding another Beacon to maintain the integrity of the data collection.
- In a shipping context, we are not aware of any regulatory requirements necessitating a calibrated sensor for measuring outside temperature. It is important to note that we are not collecting quality assurance (QA) relevant data pertaining to the payload area.
The calibration of the SmartHub is very expensive (it is a bulky device) and the device itself is not very accurate. As it can be used both in stationary and mobile use, it also has to work and transmit being constantly powered.
Powering a device and connecting it to the grid generate heat inside the device, leading to a minimum offset of 2-3K (°C). As we cannot check the condition of the device, its temperature sensor cannot be reliably calibrated. For that reason, trusted device manufacturers (e.g for the SmartTag) disable the tracking functionality during charging to create distorted measures during charging.