TÜV Rheinland Test Report: IKEA E2400-T Wireless Charger with Light (VÄSTMÄRKE)

1 Test Sites

1.1 Test Facilities

Laboratory: TÜV Rheinland (Shanghai) Co., Ltd.

Address: Workshop14, North Half of Workshop 10 and Workshop 16, Pingqian (Taicang) Modern Industrial Park, No.525, Yuewang Lingang South Road, Shaxi, Taicang, Jiangsu, China

The used test equipment is in accordance with CISPR 16-1 series standards for measurement of radio interference.

2 General Product Information

2.1 Product Function and Intended Use

The EUT (equipment under test) is a wireless charger with light (VÄSTMÄRKE). For further information, refer to the user's manual.

2.2 Ratings and System Details

• Rated input: DC 5 V, 3 A; DC 9 V, 2.2 A
• Output: 15 W Max.
• Protection class: III

2.3 Independent Operation Modes

1. Continuous working with matching load.
2. Light on

2.4 Description of Interconnecting Cables

None.

2.5 Noise Generating and Noise Suppressing Parts

Refer to the circuit diagram for further information.

2.6 Highest Frequency Generated or Used in the Device

The highest frequency used in the EUT is less than 108 MHz.

2.7 Submitted Documents

Circuit diagram, user's manual and rating label.

3 Test Set-up and Operation Modes

3.1 Principle of Configuration Selection

Emission: The equipment under test (EUT) was configured to measure its highest possible emission level. The test conditions were adapted accordingly in reference to the instructions for use.

The sequence of testing:

1. Radiated emission tests were performed on 2024-11-20.
2. Conducted emission tests were performed on 2024-11-13.

3.2 Equipment and Cable Arrangement

Block diagram for both conducted emission and radiated emission tests:

Diagram Description: A block diagram shows the setup for conducted and radiated emissions. For conducted emissions, the EUT is connected to a LISN, which is connected to a transformer and power supply. An EMI receiver and computer are also part of the setup. For radiated emissions, the EUT is placed on a table, with an antenna connected to an EMI receiver and computer.

3.3 Test Software

No special test software was used during the tests.

3.4 Special Accessories and Auxiliary Equipment

3.5 Countermeasures to Achieve EMC Compliance

No other special measure is employed to achieve the requirement.

4 Conformity Decision Rule

For all EMI tests included in this report, as measurement uncertainties are less than the values UCISPR given in CISPR 16-4-2, compliance with the limits is determined by comparing measurement results directly with corresponding limits without taking into consideration of measurement uncertainties.

5 Test Results EMISSION

5.1 Emission in the Frequency Range up to 30 MHz

5.1.1 Mains Terminal Continuous Disturbance Voltage

Result: Passed

• Date of testing: 2024-11-13
• Test procedure: FCC 47 CFR Part 15, Subpart B:2023, ICES-003:2020, ANSI C63.4-2014 and CISPR 16-2-1
• Frequency range: 0.15-30 MHz
• Limits: Quasi-peak limit: 0.15 - 0.5 MHz, 66 to 56 dBμV (decrease with the logarithm of frequency); 0.5 - 5 MHz, 56 dBμV; 5 - 30 MHz, 60 dBμV. Average limit: 0.15 - 0.5 MHz, 56 to 46 dBμV (decrease with the logarithm of frequency); 0.5 – 5 MHz, 46 dBμV; 5 – 30 MHz, 50 dBμV.
• Bandwidth of EMI receiver for final measurement: 9 kHz
• Measurement time for final measurement: 1 s
• Kind of test site: Shielded room
• Input voltage: AC 120 V, 60 Hz (with USB charger)
• Operational mode: Modes 1+2 as defined in clause 2.3
• Ambient condition: Temperature: 21.5 °C; Relative humidity: 48 %
• Expanded measurement uncertainty (k=2): 2.33 dB

The minimum margin to the limit is 2.9 dB at 0.168000 MHz. The margin is higher than expanded measurement uncertainty.

The measurement setup was made according to ANSI C63.4-2014 in a shielded room. The measurement equipment like test receivers, quasi-peak detector and artificial mains network (AMN) are in compliance with CISPR 16-1 series standards. The tested object was set-up on a wooden support. The EUT was set 0.8 m away from the AMN. The cord longer than necessary to be connected to the AMN was folded forth and back parallel so as to form a bundle with a length between 0.3 m and 0.4 m. The disturbance voltage test was performed on the neutral line and phase line of the power supply of the EUT respectively.

Figure 1: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, L

Diagram Description: A graph showing conducted emission levels for the Line (L) connection. The X-axis represents frequency from 150 kHz to 30 MHz. The Y-axis represents Level in dBμV. Quasi-peak and Average limits are shown as red and green lines, respectively. Several data points are plotted, indicating measured Quasi-peak and Average values.

Figure 2: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, N

Diagram Description: A graph showing conducted emission levels for the Neutral (N) connection. The X-axis represents frequency from 150 kHz to 30 MHz. The Y-axis represents Level in dBμV. Quasi-peak and Average limits are shown as red and green lines, respectively. Several data points are plotted, indicating measured Quasi-peak and Average values.

5.2 Emission in the Frequency Range above 30 MHz

5.2.1 Radiated emission (30 MHz - 1 GHz)

Result: Passed

• Date of testing: 2024-11-20
• Test procedure: FCC 47 CFR Part 15, Subpart B:2023, ICES-003:2020, ANSI C63.4-2014 and CISPR 16-2-3
• Frequency range: 30 – 1000 MHz
• Limits (3 m distance): 30-88 MHz, 40 dBuV/m; 88 – 216 MHz, 43.5 dBuV/m; 216 – 960 MHz, 46 dBuV/m; Above 960 MHz, 54 dBμV/m.
• Bandwidth of EMI receiver for final measurement: 120 kHz
• Measurement time for final measurement: 1 s
• Kind of test site: Semi-anechoic chamber
• Operational mode: Modes 1+2 as defined in clause 2.3
• Input voltage: AC 120 V; 60 Hz (with USB charger)
• Ambient condition: Temperature: 20.5 °C; Relative humidity: 45%
• Expanded measurement uncertainty (k=2): 5.40 dB

The minimum margin to the limit is 5.22 dB at 42.610000 MHz. The margin is lower than expanded measurement uncertainty.

The radiated disturbance test was carried out in a semi-anechoic chamber. The test distance from the receiving antenna to the EUT is 3 m. The normalized site attenuation of the semi-anechoic chamber is regularly calibrated to ensure the radiated disturbance test results are valid. During the test, the EUT was placed on a 0.8 m high wooden table above the reference ground plane. The wooden table was rotated 360° around and the height of the antenna was varied from 1 m to 4 m to find the maximum disturbance. The test was performed with the antenna both in its horizontal and vertical polarizations.

Note 1: The highest frequency of the internal sources of the EUT is less than 108 MHz, so according to FCC 47 CFR Part 15, Subpart B:2020 this measurement was only made up to 1 GHz.

Note 2: The class B limits of FCC 47 CFR Part 15, Subpart B:2023 is stricter than those ICES-003:2020 for 3 m test distance. Therefore, the former limits are used in following figures and tables.

Note 3: The EUT generated the highest emission level under DC 9 V by measurement. Therefore, only the data of DC 9 V was retained.

Figure 3: Spectral Diagrams and measurement results, horizontal polarization (30 MHz to 1 GHz)

Diagram Description: A graph showing radiated emission levels for horizontal polarization. The X-axis represents frequency from 30 MHz to 1 GHz. The Y-axis represents Level in dBμV/m. The limit line is shown in red. Several data points are plotted, indicating measured Quasi-peak values.

Figure 4: Spectral Diagrams and measurement results, vertical polarization (30 MHz to 1 GHz)

Diagram Description: A graph showing radiated emission levels for vertical polarization. The X-axis represents frequency from 30 MHz to 1 GHz. The Y-axis represents Level in dBμV/m. The limit line is shown in red. Several data points are plotted, indicating measured Quasi-peak values.

6 Photographs of the Test Set-Up

Refer to the test setup file.

7 List of Test and Measurement Instruments

8 List of Figures

• Figure 1: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, L
• Figure 2: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, N
• Figure 3: Spectral Diagrams and measurement results, horizontal polarization (30 MHz to 1 GHz)
• Figure 4: Spectral Diagrams and measurement results, vertical polarization (30 MHz to 1 GHz)