CHR0661 Wireless Charger RF Exposure Info MPE Report Salom Electric (Xiamen) Co., Ltd.

FCC ID : 2ARXUCHR0661
IC: 24563-CHR0661
1.1.Measuring Standard
FCC CFR 47 Part 1(1.1310) KDB 680106 D01 v03
RSS-102 Issue 5
1.2.Requirements
The EUT does comply with item 5(b) of KDB 680106 D01 v03
1) Power transfer frequency is less than 1MHz
2) Output power from each primary coil is less than or equal to 15 watts.
3) The transfer system includes only single primary and secondary coils. This includes
charging systems that may have multiple primary coils and clients that able to detect
and allow coupling only between individual pair of coils.
4) Client device is inserted in or placed directly in contact with the transmitter.
5) Mobile exposure conditions only (portable exposure conditions are not covered by
this exclusion)
6) The aggregate H-field strengths at 15 cm surrounding the device and 20 cm above
the top surface from all simultaneous transmitting coils are demonstrated to be less
than 50% of the MPE limit.
1.3.Test Configuration
1) The field strength of both E-field and H-field was measured at 15cm using the
equipment list above for determining compliance with the MPE requirements of
FCC Part 1.1310.
2) The RF power density was measured at Under maximum load test
3) Maximum E-field and H-field measurements were made 15cm from each side of the
EUT. Along the side of the EUT and still 15cm away from the edge of the EUT, the
field probes were positioned at the location where there is maximum field strength.
The maximum E-field and H-field is reported below.
4) This device uses a wireless charging circuit for power transfer operating at the
frequency of 110 –148kHz. Thus, the 300kHz limits were used: E-field Limit = 614
(V/m); H-field limit = 1.63 (A/m).
1.4.Test Procedure
1) The RF exposure test was performed in anechoic chamber.
2) The aggregate H-field strengths at 15 cm surrounding the device and 20 cm above
the top surface
3) The highest emission level was recorded and compared with limit as soon as
measurement of each points (A, B, C, D, E) were completed.
4) The EUT was measured according to the dictates of KDB 680106 D01 v03.
Remark:
The EUT’s test position A, B, C, D, and E is valid for the E and H field measurements.
1.5.Test Setup
1.6.Limits
Remark: Emissions between 100 kHz to 300 kHz should be assessed versus the limits at
300 kHz in Table 1 of Section 1.1310: 614 V/m and 1.63 A/m
1.7.Measuring Device and Test Equipment
For MPE Measurement
Item
1.
2.
3.
Equipment
Manufacturer
E-Field Probe
Narda
(100kHz-60GHz)
H-Field Probe
Narda
(300KHz-30MHz)
Broadband Field Meter Narda
Model No.
Serial No.
Last Cal.
NBM-520
D-0830
Oct. 18, 2018
Cal.
Interval
1 Year
2300/90.10
B-0137
Jan. 06, 2018
1 Year
NBM-550
Q201455
Jan. 06, 2018
1 Year
1.8.Measuring Results
Table 1: E-Field Strength at 15 cm from the edges surrounding the EUT and 20cm from the
top surface of the EUT
EUT Test
Mode
1% Battery
Level
50% Battery
Level
99% Battery
Level
Measured E-Field Strength Values (V/m)
Test
Position
0.62
Test
Test
Test
Position Position Position
0.66
0.62
0.64
Test
Position
0.63
50%
Limit
(V/m)
Limit
(V/m)
307
614
0.60
0.64
0.63
0.64
0.59
307
614
0.63
0.62
0.58
0.61
0.60
307
614
Table 2: H-Field Strength at 15 cm from the edges surrounding the EUT and 20cm from the
top surface of the EUT
EUT Test
Mode
1% Battery
Level
50% Battery
Level
99% Battery
Level
Measured H-Field Strength Values (A/m)
Test
Position
0.451
Test
Test
Test
Position Position Position
0.449
0.446
0.450
Test
Position
0.449
50%
Limit
(A/m)
Limit
(A/m)
0.815
1.63
0.450
0.450
0.445
0.447
0.447
0.815
1.63
0.449
0.447
0.445
0.448
0.448
0.815
1.63
Remark:
The aggregate H-field strengths at 15 cm surrounding the device and 20 cm above the top
surface from all simultaneous transmitting coils are demonstrated to be less than 50% of the
MPE limit.
***** End of Test Report *****