N9Z910491Wireless Thermometer Transmitter

Modifications not authorized by the manufacturer may void users Modifications not authorized by the manufacturer may void users authority to operate this device

FCC ID: N9Z910491 PHOTOGRAPH OF THE PRODUCT FRONT VIEW OF THE PRODUCT REAR VIEW OF THE PRODUCT

FCC ID: N9Z910491 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. MADE IN CHINA

FCC ID: N9Z910491 LABEL LOCATION BOTTOM VIEW OF THE DEVICE WITH FCC ID LABEL FCC ID: N9Z910491 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. MADE IN CHINA

FCC ID: N9Z910491 PHOTOGRAPH OF THE PRODUCT INNER CIRCUIT TOP VIEW INNER CIRCUIT BOTTOM VIEW

FCC ID: N9Z910491 Circuit Description The 433MHz crystal oscillator drives the base of Q3 the final/buffer amplifier. The modulation provided by IC (U1, W741C260). The output of Q3 has the matching network consisting of L2 and C27 that limit the harmonic content and effect the proper coupling of the antenna to the output stage. Antenna, Ground and Power Source There is no external antenna connection, Antenna build in on PCB, there is no external ground connection. The ground is only that of the printed circuit board. Electric current is supplied by a 3 Volt (“AAA” size battery x 1) primary battery

Date: 2001-09-17 TEST REPORT Page 1 of 23 No.: HM105537 FCC PART 15 SUBPART C CERTIFICATION REPORT FOR LOW POWER TRANSMITTER TEST REPORT No.:HM105537 Equipment Under Test [EUT]:Sensor Model Number:910491TX Applicant:Ewig Industries Company Ltd. FCC ID :N9Z910491 Date: 2001-09-17 TEST REPORT Page 2 of 23 No.: HM105537 CONTENT: Cover Page 1 of 23 Content Page 2-3 of 23 Conclusion Page 4 of 23 1.0General Details 1.1Test Laboratory Page 5 of 23 1.2Applicant Details Page 5 of 23 Applicant HKSTC Code Number for Applicant Manufacturer 1.3Equipment Under Test [EUT] Page 6 of 23 Description of EUT operation 1.4Date of Order Page 6 of 23 1.5Submitted Sample Page 6 of 23 1.6Test Duration Page 6 of 23 1.7Country of Origin Page 6 of 23 1.8 Additional Information of EUT Page 7 of 23 2.0Technical Details 2.1Investigations Requested Page 8 of 23 2.2Test Standards and Results Summary Page 8 of 23 3.0Test Results 3.1Emission Page 9-14 of 23 3.2Bandwidth Measurement Page 15-16 of 23 Date: 2001-09-17 TEST REPORT Page 3 of 23 No.: HM105537 Appendix A List of Measurement Equipment Page 17 of 23 Appendix B Duty Cycle Correction During 100 msec Page 18-19 of 23 Appendix C Periodic Operation Page 20-21 of 23 Appendix D Photographs Page 22-23 of 23 Date: 2001-09-17 TEST REPORT Page 4 of 23 No.: HM105537 CONCLUSION The submitted product was deemed to have COMPLIED with the requirements of Federal Communications Commission [FCC] Rules and Regulations Part 15. The tests were performed in accordance with the standards described above and on Section 2.2 in this Test Report. Verify byPatrick Wong for Managing Director Date: 2001-09-17 TEST REPORT Page 5 of 23 No.: HM105537 1.0General Details 1.1Test Laboratory The Hong Kong Standards and Testing Centre Ltd. EMC Laboratory 10 Dai Wang Street, Taipo Industrial Estate New Territories, Hong Kong Telephone:852 2666 1888 Fax:852 2664 4353 1.2Applicant Details Applicant EWIG INDUSTRIES COMPANY LIMITED. 13/F., Houtex Industrial Bldg., 16 Hung To Road, Kwun Tong, Kowloon, Hong Kong. Telephone:852 2951 6700 Fax:852 2343 5799 HKSTC Code Number for ApplicantEWI001 Manufacturer EWIG INDUSTRIES COMPANY LIMITED. 13/F., Houtex Industrial Bldg., 16 Hung To Road, Kwun Tong, Kowloon, Hong Kong. Telephone:852 2951 6700 Fax:852 2343 5799 Date: 2001-09-17 TEST REPORT Page 6 of 23 No.: HM105537 1.3Equipment Under Test [EUT] Description of Sample Product:Sensor Manufacturer:Ewig Industries Company Limited. Brand Name:Springfield Model Number:910491TX Input Voltage:3Vd.c (“AAA” size battery x 2) 1.3.1Description of EUT Operation The Equipment Under Test (EUT) is an Ewig Industries Company Limited., 434.1MHz RF wireless remote sensor. The transmitter is an automatic transmitter. The EUT is to transmit RF signal while temperature measurement is changed. The EUT is for data transmission, Modulation by Data Code. Tape is pulses modulation. 1.4Date of Order 2001-08-04 1.5Submitted Sample(s): 3 Samples per model 1.6Test Duration 2001-09-05 1.7Country of Origin China Date: 2001-09-17 TEST REPORT Page 7 of 23 No.: HM105537 1.8Additional Information of EUT SubmittedNot Available User Manual Part List Circuit Diagram Printed Circuit Board [PCB] Layout Block diagram FCC ID Label Date: 2001-09-17 TEST REPORT Page 8 of 23 No.: HM105537 2.0Technical Details 2.1Investigations Requested Perform ElectroMagnetic Interference measurement in accordance with FCC 47CFR [Codes of Federal Regulations] Part 15 and ANSI C63.4:1992 for FCC Certification. 2.2Test Standards and Results Summary Tables EMISSION Results Summary Test ConditionTest RequirementTest MethodClass /Test Result SeverityPassFailedN/A Field Strength of Fundamental Emissions & Spurious Emissions FCC 47CFR 15.231eANSI C63.4:1992N/A Radiated Emissions, 30MHz to 1GHz FCC 47CFR 15.209ANSI C63.4:1992Class B Conducted Emissions on AC, 0.45MHz to 30MHz FCC 47CFR 15.207ANSI C63.4:1992Class B Note: N/A - Not Applicable Date: 2001-09-17 TEST REPORT Page 9 of 23 No.: HM105537 3.0Test Results 3.1Emission 3.1.1Radiated Emissions Test Requirement:FCC 47CFR 15.231e Test Method:ANSI C63.4:1992 Test Date:2001-09-05 Mode of Operation:On mode Test Method: The sample was placed 0.8m above the ground plane on the OATS *. Measurements in both horizontal and vertical polarities were performed. During the test, each emission was maximized by: having the EUT continuously working, investigate all operating modes, rotated about all 3 axis (X, Y & Z) to obtain worst position, manipulating interconnecting cables, rotating turntable, varying antenna height from 1m to 4m in both horizontal and vertical polarizations. The emissions worst-case are shown in Test Results of the following pages. *:OATS [Open Area Test Site] located at HKSTC with a metal ground plane on filed with the FCC pursuant to section 2.948 of the FCC rules, with Registration Number: 90657. Test Setup: EUT distance = 3m Pre -Amplifier Receiver Turn Table Computer Ground plane Date: 2001-09-17 TEST REPORT Page 10 of 23 No.: HM105537 Limits for Field Strength of Fundamental Emissions [FCC 47CFR 15.231e]: Frequency Range of Fundamental Field Strength of Fundamental Emissions Field Strength of Spurious Emissions [MHz][μV/m][μV/m] 40.66-40.701,000100 70-13050050 130-174500 to 1,500 *50 to 150 * 174-2601,500150 260-4701,500 to 5,000 *150 to 500 * Above 4705,000500 Where F is the frequency in MHz, the formula for calculating the maximum permitted fundamental field strengths are as follows: for the band 130-174 MHz, μV/m at meters=22.72727(F)-2454.545; for the band 260-470 MHz, μV/m at 3 meters =16.6667(F)-2833.3333. The maximum permissible unwanted emission level is 20dB below the maximum fundamental level. Results: Field Strength of Fundamental Emissions Peak Value FrequencyLevel @3mCorrection Factor Field Strength Field Strength Limit ** @3m Antenna Polarity MHzdBμVdB/mdBμV/mμV/mμV/m 434.157.722.079.79,660.544,016.8Horizontal Field Strength of Spurious Emissions Peak Value * FrequencyLevel @3m Correction Factor Field St…

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FCC ID: N9Z910491 TEST SET UP PHOTOGRAPH OF THE PRODUCT MEASUREMENT OF RADIATED EMISSION TEST SET UP