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Rigorous testing procedures paving the way for the Selfly Freezer

At Selfly Store, we believe in innovation and quality above all. It’s this belief that led us to carry out extensive tests on our newest offering, the Selfly Freezer, before its commercial launch. Designed with a thorough attention to detail, the Freezer has undergone several rigorous tests to ensure the highest standards of performance and reliability. Continue to read to find out about our testing procedures.

Assembly review:

The first step of our testing phase was an in-depth assembly review. We scrutinized the cabinet’s physical design and assembly and compared it thoroughly with the 3D model, to ensure its structural soundness. For example, we discovered during this phase that a door sensor on the physical product sat a tiny bit higher than on the 3Dmodel, due to glue between the insulating materials and cabinet body on top of the cabinet.

Radio frequency isolation:

As the Selfly Freezer is powered by RFID (Radio Frequency Identification) technology, it naturally had to pass different RFID tests. The first test was related to that the radio frequency signal leakage outside of the Selfly Freezer was within acceptable parameters to avoid any interference with the RFID technology that powers the Freezer’s item detection capability.

Tag reading test:

The second RFID related test was to confirm the reliability and readability of the RFID tags when placed on products inside the Selfly Freezer.  This was of utmost importance since frozen conditions naturally are different compared to the chilled or ambient conditions that already have been tested for the Selfly Fridge and Ambient upon their launch. This testing was performed in three parts:

1) Checking that the adhesive of the tags were sticking to all products as it should in frozen conditions. The results showed that this was an easy task for our current tag portfolio. However, it was important that the surface was ridden from ice and humidity before applying the tag.  

2) Checking the readability of tags with the cabinet door closed. The tags inside the cabinet were read every minute for several weeks. This test yielded a readability accuracy of 99.999 %.

3) Checking the readability of tags when the door opened every 10 minutes for 30 seconds. The tags inside the cabinet were read every minute for two weeks. This test was designed to test that the humidity and changing temperature when the door opened would not impact the tags and their readability. This test yielded 100% readability accuracy of the tags.

The results from the tag testing showed that the RFID tag portfolio we provide today is an excellent fit for frozen product sales.

50K door opening test:

We wanted to really guarantee the durability of our Freezer. Consequently, we rigorously tested the lock, hinges, door spring, handle, and routed cables with a 50,000-cycle door opening test to ensure robustness and longevity. The 50 K door openings were performed throughout a period of approximately a week.

Temperature tests:

Perhaps the most vital feature of the Freezer, its temperature control, was trialed through several temperature tests. We verified that the components, shelves, and products within the Freezer were in the optimal temperature range. We also fine-tuned any discrepancies between the user interface readings and the actual temperature sensors.

To dive deeper into our temperature tests, we used Ruuvitags (wireless Bluetooth sensors measuring temperature) embedded within ice cream products for a real-world simulation. With door opening cycles every 10 minutes, we first tested with the Freezer empty, and then filled it with products to test under different load conditions. The results showed that the Selfly Freezer has an impressive ability to maintain stable and appropriate freezing temperatures in various conditions – when empty, when full, and whether the door was being frequently opened or kept closed.

In addition to the tests performed during the product development phase mentioned above, we also test each intelligent Selfly Store vending machine before its delivery to customer. The tests include radio frequency isolation, temperature, payment terminal functionality, lock functionality, tag reading, internet connection and much more. In conclusion, these rigorous tests demonstrate our firm commitment to quality and superior performance. At Selfly Store, we’re not just delivering intelligent retail solutions; we’re delivering a promise of excellence, reliability, and innovation with every Selfly Freezer.

Test how the Selfly Freezer works in our showroom.

Read more about the Selfly Freezer here