Digitalization has taken root in almost all aspects of today’s human life. Basically, digitalization is a concept where a device can transmit the data through a network without requiring an intermediary medium. Smart refrigerators are example of a digitalization in home appliances industry. Smart refrigerators generally have a touchscreen interface and being able to connect to the internet via Wifi to provide a number of additional features.
In this article we will discuss all about smart refrigerators and its DJID certification requirements in Indonesia.
What is smart refrigerators?
Smart refrigerators are a type of refrigerator that combines Wifi connectivity to create the concept of smart home appliances. With this technology, smart refrigerators can offer advanced features that can be accessed with internet connectivity.
Smart refrigerators that are connected to the internet allow users to access information and more advanced features on the refrigerator via smartphone. By downloading the compatible application, users can do various activities easily.
How does smart refrigerators work?
If we are talking about smart refrigerators, mostly they have been embedded with specific operating system (OS). The OS will generally be compatible with developed applications on smartphones.
In other words, the OS works to manage resources so that commands given by the user can be executed. By adopting the OS technology, there are several IoT elements that are also applied. Here are the general steps to connect a smart refrigerator to the smartphone:
- Make sure the refrigerator and smartphone are connected to the same Wifi network.
- Install the compatible application developed by each refrigerator brand.
- In the smartphone application, select the option to add a new device and select the device type as refrigerator.
- Follow the instructions in the smartphone application to connect with the refrigerator. This may involve some activities such as entering a QR code, entering a Wifi name and password, or pressing a specific button on the refrigerator.
- Once the connection process is complete, users can use the application to control and monitor the refrigerator via smartphone.
Differences between smart refrigerators and regular refrigerators
Both smart refrigerators and regular refrigerators are used for cooling activity. However, these two trype of refrigerators are also have differences, especially for embedded technologies. Here are some differences between smart refrigerators and regular refrigerators:
Refrigerator appearance
In terms of appearance, smart refrigerators are equipped with a touch screen on the door. It is used to view information in the refrigerator, such as room temperature, product availability in the refrigerator, and much more.
Meanwhile, regular refrigerators do not have a touch screen. In other words, checking the room temperature and humidity and checking product availability must be done manually.
Embedded features
Features of a regular refrigerator is not as many as a smart refrigerator has. Regular refrigerators more focus on the compressor and room temperature control.
However, smart refrigerators provide more sophisticated features, such as notification feature to display the availability of food products in the refrigerator, or internal camera feature to check the condition of the refrigerator directly without having to open it.
Refrigerator temperature settings
A common feature available on both smart refrigerators and regular refrigerators is the temperature setting feature. However, regular refrigerators do not offer automatic temperature settings.
For regular refrigerators, users need to set and check it regularly so that the room temperature and humidity are maintained. Meanwhile, smart refrigerators have an automatic temperature and humidity control system to maintain the freshness of the products inside.
Sensor sensitivity
In regular refrigerators, the light sensor in the refrigerator will usually turn off and on automatically. If the door is opened, the light will turn on and vice versa.
Meanwhile, in smart refrigerators, sensors are not only applied to lights. Smart refrigerators allow users to open and close the door automatically because of the sensor.
DJID certification for smart refrigerators
As already mentioned before that smart refrigerators will requires Wifi connectivity to be connected to smartphones. Because of that functions every smart refrigerator should meet the applicable technical standards of Wifi before being marketed in Indonesia. This compliance activity is processed through a product certification called DJID certification.
By processing the DJID certification, it indicates that the product has been marketed legally in Indonesia. In addition, DJID certificate also ensures that the smart refrigerators operated in the allowable radio frequency spectrums in Indonesia, so it will not cause any interference during its operation.
Before processing the DJID certification of smart refrigerators, it is necessary to perform RF, EMC, and electrical safety tests first. Dimulti already handled multiple type and size of smart refrigerators. Therefore, we are fully experienced about the DJID certification process of smart refrigerators, especially when it comes to the complexity of sample accommodation and testing process of smart refrigerators.
RF test for smart refrigerators
As already mentioned before that smart refrigerators support Wifi connectivity during its operation. Usually, smart refrigerators will only use Wifi band 2.4 GHz for its connectivity. The testing of Wifi is conducted based on the technical regulation of KEPMEN KOMDIGI No. 12 year 2025. Below is the required testing parameters for Wifi feature.
| Frequency range | Classification of use | Output power | Channel bandwidth | Spurious emission |
| 2400 – 2483.5 MHZ | Access type 1 | < 27 dBm EIRP (500 mWatt) | < 40 MHz | ETSI EN 300 328 (min version 1.8.1) |
EMC test for smart refrigerators
For EMC local test of smart refrigerators, it is conducted based on the international EMC standard of CISPR 32. Because smart refrigerators are supplied by direct AC power, then the required EMC parameters to be tested are EMC radiated and conducted emissions.
The EMC radiated emission test for smart refrigerators is performed in the low frequency of 30 – 1000 MHz and high frequency of 1000 – 6000 MHz. Meanwhile, the EMC conducted emission test is performed at main terminal power of smart refrigerators with the frequency range of 150 kHz – 30 MHz.
Electrical safety test for smart refrigerators
Since smart refrigerators are supplied by direct AC power, an electrical safety test is required to do. The testing process is performed based on IEC standards of IEC 60950. However, for DJID certification the required electrical safety parameters are only touch current and electrical strength.
The testing of touch current is carried out by attaching the test leads to particular parts of the smart refrigerators that possibly hold by hand. The results of touch current test should be less than 3.5 mA.
The testing of electrical strength is carried out by providing excess voltage to the smart refrigerators. The results of electrical strength test should be no disconnection when it is given a voltage of 1500V – 3000V.
If you have any question related to DJID certification, please don’t hesitate to contact us by sending enquiry to info@narmadi.com.
