Related information: France's SAR requirements for wireless products
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Q1. Regarding the second type of product mentioned in the article, if the power is less than 20mW and SAR does not need to be tested, does it belong to compliance with the new system requirements?
Ans: In terms of technical definition, this type of product has a power of up to 20mW. However, when the actual power used during product shipment is less than 20mW, it is not subject to the new regulations.
However, when the actual usage exceeds 20mW, it is still necessary to comply with the new regulations.
However, in the defined second category of products, SEYA has often exceeded the 20mW limit in past testing experience for the following products:
WiFi enabled tablet computer;
Radio controls used for drones or for model making;
• WiFi laptop computer;
Q2. How should SAR be evaluated for the second category of products exceeding 20mW mentioned above?
Ans:
a. Please remember that the Body SAR Limit is 10g and the SAR test result should be less than 2.0 mW/g; The test distance is 5mm or 0mm/Limbe SAR Limit is 10g. The SAR test result should be less than 4.0 mW/g; The testing distance is 0mm.
A WiFi enabled tablet computer, following the testing requirements of EN 62209-2, will test the four edges and back of the product. The testing distance will follow the 5mm testing distance specified in EN 50566 for Body SAR testing.
However, if the product can pass the Body SAR test directly at 0mm, SEYA would recommend testing directly at 0mm, so that both Body SAR and Limbe SAR can be presented under the same testing conditions.
On the contrary, if the 0mm Body SAR test does not pass, then the Body SAR test of 5mm/Limbe SAR test of 0mm is required, and SAR values for two scenarios need to be presented.
b. WiFi laptop computer, following the testing requirements of EN 62209-2, will be turned on at 90 degrees, with the bottom of the keyboard 0cm in contact with the Phantom for Body SAR testing, and the back of the screen 2.5cm away from the Phantom for Bystander SAR testing (Note 1).
The bottom 0cm of the keyboard contacts the Phantom for testing, which is equivalent to the testing requirements of the so-called Limbe SAR. It is the same testing scenario and does not require additional testing. The manual can directly present both Body and Limbe simultaneously.
Based on SEYA's testing experience, WiFi laptops are almost not high and can basically meet this requirement directly.
Note 1: For a detailed description of the Bystander SAR, please refer to the RED TGN 20 SAR Guidance Document. However, whether actual testing is required requires confirmation of the antenna's position on the computer before making a decision.
c. Wireless remote controllers such as drones, if the power is greater than 20mW, will be considered as generic devices according to EN 62209-2 testing requirements, and will evaluate the six sides of the product. The testing distance part will also be tested according to the 5mm requirement in En 50566. Of course, if it can directly pass the Body SAR Limit requirement at 0mm, only 0mm needs to be tested.
Q3. Regarding the front of the WiFi laptop keyboard, should an evaluation be conducted as both hands will be placed directly on it?
Ans: Currently not needed, as this testing evaluation is not required by regulations, and the existing RED TGN 20 SAR Guidance Document does not require this aspect of testing.
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Q4. What are the testing scenarios for Head/Body/Limbe?
Ans: For testing scenarios such as laptops, tablets, and wireless remote controls, we have provided explanations in Q2. Here, we will provide an explanation for mobile phone products.
a. The Head SAR test follows En 62209-1 and En 50360, and will test the close fit (Cheek) and 15 degree (Tilted) of the left and right ears respectively, in two usage states.
Cheek Mode
b. The Body/Limbe SAR test follows En 62209-1 and En 50360, and according to the requirements of En 50360, the Body SAR test distance is 5mm. The Limbe SAR test distance is 0mm.
For general CE testing, when the product has not entered France or is used for certification purposes, only the front and back sides can be tested.
But when the product enters France, it is recommended to test both sides and add four edges for a complete evaluation.
BTL's current recommendation is to test all 6 sides of the Body SAR section once the product is sold in Europe.
Then, for the Limbe SAR section, SEYA suggests testing 0mm on 6 surfaces to conduct a complete evaluation test and identify the exact state with the highest SAR value.
The Limbe SAR test follows En 62209-1 and En 50360, with a testing distance of 0mm.
For general CE testing, when the product has not entered France or is used for certification purposes, only the front and back sides can be tested.
But when the product enters France, it is recommended to test both sides and add four edges for a complete evaluation.
SEYA's current recommendation is to test all 6 sides of the Body SAR 5mm section and simultaneously conduct 6 sides of the Limbe SAR 0mm section once the product is sold in Europe.
