Test Report

FCC ID: 2ARF2ML-310

Test Report

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FCCID_4191215

Electromagnetic Compatibility Test Report Tests Performed on a New Cosmos Electric Co., Ltd. Methane Detector Transciever, Model ML-310CE Radiometrics Document RP-9012B Product Detail: FCC ID: 2ARF2ML-310 Equipment type: DSS Test Standards: US CFR Title 47, Chapter I, FCC Part 15 Subpart C FCC Part 15 CFR Title 47: 2018 This report concerns: Class II Permissive Change FCC Part 15.247 Tests Performed For: Test Facility: New Cosmos Electric Co., Ltd. Radiometrics Midwest Corporation 2-5-4 Mitsuya-naka, Yodogawa-ku 12 Devonwood Avenue Osaka 532-0036 Japan Romeoville, IL 60446-1349 (815) 293-0772 Test Date(s): January 4 to March 4, 2019 Document RP-9012B Revisions: Rev. Issue Date Affected Sections Revised By 0 February 22, 2019 1 March 4, 2019 10, 11.3 Joseph Strzelecki Radiometrics Midwest Corporation - www.Radiomet.com Page 1 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Table of Contents 1.0 ADMINISTRATIVE DATA ................................................................................................................ 3 2.0 TEST SUMMARY AND RESULTS .................................................................................................. 3 3.0 EQUIPMENT UNDER TEST (EUT) DETAILS ................................................................................. 4 3.1 EUT Description ........................................................................................................................... 4 3.1.1 FCC Section 15.203 Antenna Requirements ......................................................................... 4 4.0 TESTED SYSTEM DETAILS ........................................................................................................... 4 4.1 Tested System Configuration ....................................................................................................... 4 4.2 Special Accessories ..................................................................................................................... 4 4.3 Equipment Modifications .............................................................................................................. 4 5.0 TEST SPECIFICATIONS ................................................................................................................. 4 6.0 TEST PROCEDURE DOCUMENTS ................................................................................................ 4 7.0 RADIOMETRICS’ TEST FACILITIES .............................................................................................. 5 8.0 DEVIATIONS AND EXCLUSIONS FROM THE TEST SPECIFICATIONS ...................................... 5 9.0 CERTIFICATION.............................................................................................................................. 5 10.0 TEST EQUIPMENT TABLE ........................................................................................................... 6 11.0 TEST SECTIONS........................................................................................................................... 6 11.1 Occupied Bandwidth Data .......................................................................................................... 6 11.2 Peak Output Power .................................................................................................................. 10 11.3 Band-edge Compliance of RF Conducted Emissions .............................................................. 12 11.4 Spurious RF Conducted Emissions at Antenna Port ................................................................ 14 11.5 Radiated RF Emissions ............................................................................................................ 18 11.5.1 Field Strength Calculation .................................................................................................. 18 11.5.2 Radiated Emissions Test Results ...................................................................................... 19 11.6 Unintentional Emissions (Receive Mode) ................................................................................. 23 11.6.1 Measurement Instrumentation Uncertainty ........................................................................ 25 Notice: This report must not be reproduced (except in full) without the written approval of Radiometrics Midwest Corporation. RP-9012B Rev. 1 Page 2 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 1.0 ADMINISTRATIVE DATA Equipment Under Test: A New Cosmos Electric Co. Ltd., Methane Detector Model: ML-310CE Serial Number: 01350050092B71B This will be referred to as the EUT in this Report Date EUT Received at Radiometrics: Test Date(s): January 3, 2019 January 4 to March4, 2019 Test Report Written By: Test Partially Witnessed By: Joseph Strzelecki Joe Deluca Senior EMC Engineer New Cosmos Electric Co. Radiometrics’ Personnel Responsible for Test: Test Report Authorized By: Joseph Strzelecki Chris W. Carlson Senior EMC Engineer Director of Engineering NARTE EMC-000877-NE NARTE EMC-000921-NE 2.0 TEST SUMMARY AND RESULTS The EUT (Equipment Under Test) is a Methane Detector, Model ML-310CE, manufactured by New Cosmos Electric Co., Ltd. The detailed test results are presented in a separate section. The following is a summary of the test results. Emissions Tests Results Environmental Phenomena Frequency Range FCC Section Test Result Carrier Frequency Separation 902-928 MHz 15.247 a Note 1 Number of Hopping Frequencies 902-928 MHz 15.247 a Note 1 Time of Occupancy (Dwell Time) 902-928 MHz 15.247 a Note 1 20 dB Bandwidth Test 902-928 MHz 15.247 a Pass Peak Output Power 902-928 MHz 15.247 b Pass Band-edge Compliance of RF 902-928 MHz 15.247 d Pass Conducted Emissions Spurious RF Conducted Emissions 30-9300 MHz 15.247 d Pass Spurious Radiated Emissions 30-9300 MHz 15.247 d Pass Note 1: Test not repeated since change made to product would not affect results. AC Conducted emissions are not needed since the product is battery powered. RP-9012B Rev. 1 Page 3 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 3.0 EQUIPMENT UNDER TEST (EUT) DETAILS 3.1 EUT Description The EUT is a Methane Detector, Model ML-310CE, manufactured by New Cosmos Electric Co., Ltd. The EUT is a methane gas detection system. The EUT was in good working condition during the tests, with no known defects. 3.1.1 FCC Section 15.203 Antenna Requirements The antennas have a connector type that is not readily available to the general public. The connector is inside the housing and not readily available to the end user. Therefore, it meets the 15.203 Requirements. 4.0 TESTED SYSTEM DETAILS 4.1 Tested System Configuration The system was configured for testing in a typical fashion. The EUT was placed on an 80-cm or 150 cm high, nonconductive test stand. The testing was performed in conditions as close as possible to installed conditions. Wiring was consistent with manufacturer's recommendations. The EUT was tested as a stand- alone device. Power was supplied by new 3-volt batteries. The identification for all equipment, plus descriptions of all cables used in the tested system, are: Tested System Configuration List Item Description Type* Manufacturer Model Number Serial Number 1 Methane Detector E New Cosmos Electric Co., ML-310CE 01350050092B71B Ltd. * Type: E = EUT 4.2 Special Accessories No special accessories were used during the tests in order to achieve compliance. 4.3 Equipment Modifications No modifications were made to the EUT at Radiometrics' test facility in order to comply with the standards listed in this report. 5.0 TEST SPECIFICATIONS Document Date Title FCC 2018 Code of Federal Regulations Title 47, Chapter 1, Federal Communications CFR Title 47 Commission, Part 15 - Radio Frequency Devices 6.0 TEST PROCEDURE DOCUMENTS The tests were performed using the procedures from the following specifications: RP-9012B Rev. 1 Page 4 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Document Date Title ANSI 2014 Methods of Measurement of Radio Noise Emissions from Low-Voltage C63.4-2014 Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz ANSI 2013 American National Standard for Testing Unlicensed Wireless Devices C63.10-2013 7.0 RADIOMETRICS’ TEST FACILITIES The results of these tests were obtained at Radiometrics Midwest Corp. in Romeoville, Illinois, USA. Radiometrics is accredited by A2LA (American Association for Laboratory Accreditation) to conform to ISO/IEC 17025: 2005 "General Requirements for the Competence of Calibration and Testing Laboratories". Radiometrics’ Lab Code is 121191 and Certification Number is 1495.01. Radiometrics’ scope of accreditation includes all of the test methods listed herein. A copy of the accreditation can be accessed on our web site (www.radiomet.com). Radiometrics accreditation status can be verified at A2LA’s web site (www.a2la2.org). The following is a list of shielded enclosures located in Romeoville, Illinois used during the tests: Chamber E: Is a custom-made anechoic chamber that measures 52’ L X 30’ W X 18’ H. The walls and ceiling are fully lined with RF absorber. Pro-shield of Collinsville, Oklahoma manufactured the chamber. The floor has a 9’ x 9’ section of microwave absorber for testing above 1 GHz. A separate ten-foot long, brass plated, steel ground rod attached via a 6-inch copper braid grounds each of the above chambers. Each enclosure is also equipped with low-pass power line filters. The FCC has accepted these sites as test site number US1065. The FCC test site Registration Number is 732175. A complete list of the test equipment is provided herein. The calibration due dates are indicated on the equipment list. The equipment is calibrated in accordance to ANSI/NCSL Z540-1 with traceability to the National Institute of Standards and Technology (NIST). 8.0 DEVIATIONS AND EXCLUSIONS FROM THE TEST SPECIFICATIONS There were no deviations or exclusions from the test specifications. 9.0 CERTIFICATION Radiometrics Midwest Corporation certifies that the data contained herein was taken under conditions that meet or exceed the requirements of the test specification and the data contained herein was taken with calibrated test equipment. The results relate only to the EUT listed herein. RP-9012B Rev. 1 Page 5 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 10.0 TEST EQUIPMENT TABLE Frequency Cal RMC ID Manufacturer Description Model No. Serial No. Range Period Cal Date 01/17/18 AMP-05 RMC/Celeritek Pre-amplifier MW110G 1001 1.0-12GHz 12 Mo. 01/10/19 ANT-04 Tensor Biconical Antenna 4104 2246 20-250MHz 24 Mo. 01/24/18 ANT-06 EMCO Log-Periodic Ant. 3146 1248 200-1000MHz 24 Mo. 12/05/17 ANT-36 Ailtech-Eaton Horn Antenna 96001 2013 1.0-18GHz 24 Mo. 11/19/18 CAB-106A Teledyne Coaxial Cable N/A 1090 DC-2 GHz 24 Mo. 05/07/18 CAB-1090 Teledyne Coaxial Cable N/A 1090 DC-18 GHz 24 Mo. 05/16/18 CAB-160B Teledyne Coaxial Cable N/A 1090 DC-18 GHz 24 Mo. 05/09/18 HPF-07 Mini-Circuits High Pass Filter VHF-1500+ 31121 1.7-10 GHz 24 Mo. 04/04/18 33330A00135 REC-20 HP / Agilent Spectrum Analyzer 85460A/84562A 3410A00178 30Hz-6GHz 24 Mo. 08/03/17 REC-21 Agilent Spectrum Analyzer E7405A MY45118341 9Hz-26.5 GHz 24 Mo. 01/06/18 Note: All calibrated equipment is subject to periodic checks. Software Company Test Software Name Version Applicable Tests Radiometrics REREC11D 04.19.17 RF Radiated Emissions (FCC Part 15) Agilent PSA/ESA-E/L/EMC 2.4.0.42 Bandwidth and screen shots 11.0 TEST SECTIONS 11.1 Occupied Bandwidth Data The occupied bandwidth of the RF output was measured using a spectrum analyzer. The bandwidth was measured using the peak detector function and a narrow resolution bandwidth. A broadband antenna was used to receive the modulated signal. The spectrum analyzer was set to the MAX HOLD mode to record the worst case of the modulation. The spectrum analyzer display was digitized and plotted. The plots of the occupied bandwidth for the EUT are supplied on the following page. 99% EBW 20 dB EBW Channel kHz kHz 902.40 117.5 111.6 915.00 118.0 112.1 926.80 118.0 113.1 RP-9012B Rev. 1 Page 6 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Figure 1. Occupied Bandwidth Plots RP-9012B Rev. 1 Page 7 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector RP-9012B Rev. 1 Page 8 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector RP-9012B Rev. 1 Page 9 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 11.2 Peak Output Power The EUT antenna port was connected to the Spectrum analyzer via a low-loss coaxial cable. The power output test method from ANSI C63.10 section 12.3.1 was used for this test. Trace averaging was not used. The EUT was transmitting continously. The spectrum analyzer was set to the following settings: Span = 5 MHz; RBW = 1 MHz; VBW = 3 MHz; Sweep = auto Detector function = peak; Trace = max hold The trace was allowed to stabilize. The indicated level is the peak output power. Since the gain of the antenna is less than 6 dB, the limit is not reduced. Tested by: Joseph Strzelecki/Richard Tichgelaar Test Date: 01/11/2019 Frequency Reading Cable Loss Total Power (dBm) (MHz) (dBm) (dB) dBm Watts Limit (dBm) 902.4 20.17 0.95 21.12 0.1294 30.0 915.0 20.22 0.98 21.20 0.1318 30.0 926.8 20.29 1.00 21.29 0.1346 30.0 Judgment: Passed by 8.7 dB Tested by: Joseph Strzelecki, Richard Tichgelaar Test Date: 01/11/2019 RP-9012B Rev. 1 Page 10 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector RP-9012B Rev. 1 Page 11 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 11.3 Band-edge Compliance of RF Conducted Emissions The spectrum analyzer was set to the MAX HOLD mode to record the worst case of the modulation at the band-edge, with the EUT set to the lowest frequency. The trace was allowed to stabilize. Tested by: Richard Tichgelaar, Joseph Strzelecki Test Date: January 11, 2019, and March 4, 2019 Reading at Band Edge Minimum Allowed Non Hopping Hopping Channel Freq. (MHz) Delta (dB) Delta (dB) dB 902.4 Lower Band edge 902.0 36.08 34.75 20 926.8 Upper Band edge 928.0 54.19 53.32 20 Judgment: Passed by 14.8 dB Not Hopping RP-9012B Rev. 1 Page 12 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Not Hopping Hopping Mode RP-9012B Rev. 1 Page 13 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Hopping Mode 11.4 Spurious RF Conducted Emissions at Antenna Port The spectrum analyzer was set to the MAX HOLD mode to record all spurious emissions from the lowest frequency generated in the EUT up through the 10th harmonic. The trace was allowed to stabilize. The first two plots were made while stepping through three frequencies (Low middle and high). Each frequency was on for 30 seconds. The red dislplay line was set to 20 dB below the level of the fundamental. Tested by: Joseph Strzelecki/Richard Tichgelaar Test Date: January 14, 2019 The pink Display Line on all plots was set to 20 dB below the level of the carrier. RP-9012B Rev. 1 Page 14 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 1 MHz to 2.5 GHz (902.4 MHz) 1 MHz to 2.5 GHz (915 MHz) RP-9012B Rev. 1 Page 15 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 1 MHz to 2.5 GHz (926.8 MHz) 2.5 to 10 GHz (902.4 MHz) RP-9012B Rev. 1 Page 16 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 2.5 to 10 GHz (915 MHz) 2.5 to 10 GHz (926.8 MHz) Judgement: Pass by at least 10 dB RP-9012B Rev. 1 Page 17 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 11.5 Radiated RF Emissions Radiated emission measurements were performed with linearly polarized broadband antennas. The results obtained with these antennas can be correlated with results obtained with a tuned dipole antenna. The radiated emission measurements were performed with a spectrum analyzer. The bandwidth used from 150 kHz to 30 MHz is 9 or 10 kHz and the bandwidth from 30 MHz to 1000 MHz is 100 or 120 kHz. Above 1 GHz, a 1 MHz bandwidth is used. A 10 dB linearity check is performed prior to start of testing in order to determine if an overload condition exists. A harmonic mixer was used from 18 to 25 GHz. Figure 4 herein lists the details of the test equipment used during radiated emissions tests. In addition, a high pass filter was used to reduce the fundamental emission. The EUT was rotated through three orthogonal axis as per 5.10.1 of ANSI C63.10 during the radiated tests. Final radiated emissions measurements were performed inside of an anechoic chamber at a test distance of 3 meters. The anechoic chamber is designated as Chamber E. This Chamber meets the Site Attenuation requirements of ANSI C63.4 and CISPR 16-1. Chamber E is located at 12 East Devonwood Ave. Romeoville, Illinois EMI test lab. The entire frequency range from 30 to 9300 MHz was slowly scanned with particular attention paid to those frequency ranges which appeared high. Measurements were performed using two antenna polarizations, (vertical and horizontal). The worst case emissions were recorded. All measurements may be performed using either the peak, average or quasi-peak detector functions. If the peak detector data exceeds or is marginally close to the limits, the measurements are repeated using a quasi-peak detector or average function as required by the specification for final determination of compliance. The detected emission levels were maximized by rotating the EUT, adjusting the positions of all cables, and by scanning the measurement antenna from 1 to 4 meters above the ground. 11.5.1 Field Strength Calculation The field strength is calculated by adding the Antenna Factor and Cable Loss, and by subtracting the Amplifier Gain from the measured reading. The basic equation is as follows: FS = RA + AF + CF - AG + HPF + PKA Where: FS = Field Strength RA = Receiver Amplitude AF = Antenna Factor CF = Cable Attenuation Factor AG = Amplifier Gain HPF = High pass Filter Loss Note: The actual FCC limits are in uV/m. The data in the results table coverted the limits to dBuV/m. 100 uV/m = 40.0 dBuV/m 150 uV/m = 43.5 dBuV/m 200 uV/m = 46.0 dBuV/m 500 uV/m = 54.0 dBuV/m RP-9012B Rev. 1 Page 18 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector 11.5.2 Radiated Emissions Test Results Test Date February 1, 2019 Test Distance 3 Meters Specification FCC Part 15 Subpart C Tested by Joseph Strzelecki, Richard Tichgelaar Notes Corr. Factors = Cable Loss – Preamp Gain External preamp used above 1 GHz Abbreviations Pol = Antenna Polarization; V = Vertical; H = Horizontal; P = peak; Q = QP Restricted band (15.205) Radiated emissions; Non Harmonics Transmit Mode Meter Dist Margin Freq. Reading Ant. Ant Cbl/amp Fact EUT Limit Under MHz dBuV Dect. Pol. Factor Factors dB dBuV/m dBuV/m Limit dB Note 38.2 7.1 P H 11.5 0.5 0.0 19.1 40.0 20.9 74.3 8.5 P H 9.3 0.7 0.0 18.5 40.0 21.5 118.6 11.1 P H 11.5 0.8 0.0 23.4 43.5 20.1 128.9 8.8 P H 12.1 0.9 0.0 21.8 43.5 21.7 164.2 8.6 P H 12.9 1.1 0.0 22.6 43.5 20.9 170.2 9.0 P H 13.1 1.1 0.0 23.2 43.5 20.3 258.1 11.2 P H 12.1 1.2 0.0 24.5 46.0 21.5 327.6 9.5 P H 13.9 1.6 0.0 25.0 46.0 21.0 406.9 9.8 P H 15.2 1.8 0.0 26.8 46.0 19.2 610.0 8.4 P H 18.7 2.2 0.0 29.3 46.0 16.7 977.5 9.9 P H 22.5 2.9 0.0 35.3 54.0 18.7 980.0 10.0 P H 22.5 2.6 0.0 35.1 54.0 18.9 1667.5 40.3 P H 26.1 -32.5 0.0 33.9 74.0 40.1 1 2272.5 39.5 P H 27.8 -31.8 0.0 35.5 74.0 38.5 1 2325.0 39.7 P H 28.0 -31.7 0.0 36.0 74.0 38.0 1 2695.0 39.0 P H 28.9 -31.1 0.0 36.8 74.0 37.2 1 3627.5 37.6 P H 31.6 -29.7 0.0 39.5 74.0 34.5 1 3882.5 38.2 P H 32.9 -29.2 0.0 41.9 74.0 32.1 1 37.7 7.3 P V 11.6 0.5 0.0 19.4 40.0 20.6 73.4 8.0 P V 9.3 0.7 0.0 18.0 40.0 22.0 75.2 9.1 P V 9.3 0.7 0.0 19.1 40.0 20.9 120.7 11.2 P V 11.6 0.8 0.0 23.6 43.5 19.9 163.3 9.1 P V 12.9 1.1 0.0 23.1 43.5 20.4 171.5 11.9 P V 13.1 1.0 0.0 26.0 43.5 17.5 330.6 8.6 P V 13.9 1.6 0.0 24.1 46.0 21.9 407.6 9.8 P V 15.2 1.8 0.0 26.8 46.0 19.2 610.0 9.1 P V 18.7 2.2 0.0 30.0 46.0 16.0 970.0 9.9 P V 23.1 2.6 0.0 35.6 54.0 18.4 977.5 8.8 P V 22.5 2.9 0.0 34.2 54.0 19.8 1565.0 40.2 P V 25.7 -32.6 0.0 33.3 74.0 40.7 1 2232.5 38.3 P V 27.7 -31.8 0.0 34.2 74.0 39.8 1 2315.0 38.4 P V 28.0 -31.7 0.0 34.7 74.0 39.3 1 2695.0 38.7 P V 28.9 -31.1 0.0 36.5 74.0 37.5 1 3337.5 36.5 P V 31.2 -29.9 0.0 37.8 74.0 36.2 1 3807.5 38.1 P V 32.7 -29.2 0.0 41.6 74.0 32.4 1 3935.0 37.1 P V 32.9 -29.2 0.0 40.8 74.0 33.2 1 Note 1: All Peak readings above 1 GHz were under the Average limits, so average readings are not required. Judgment: Passed by at least 10 dB RP-9012B Rev. 1 Page 19 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Radiated emissions in a graphical format. The above chart is the same data as the previous table. RP-9012B Rev. 1 Page 20 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Restricted Band Harmonic Radiated emissions Spectrum Analyzer Readings (dBuV) EUT Peak Ave Peak Ave Margin hrm Tx Peak Ave Peak Ave Corr. Emission Tot. FS Limit Under Freq Vertical Polarization Horizontal Polarization Fact. Freq Limit # MHz X Y Z Max X Y Z Max dB MHz dBuV/m dBuV/m dB 3 902.4 45.8 53.4 54.3 54.1 52.5 50.5 53.8 53.6 -1.6 2707.2 52.7 52.5 74 54 1.5 4 902.4 37.9 40.1 40.2 40.0 39.4 38.3 39.4 39.2 2.7 3609.6 42.9 42.7 74 54 11.3 5 902.4 37.0 37.3 37.0 37.1 36.4 37.0 37.2 37.0 5.8 4512.0 43.1 42.9 74 54 11.1 6 902.4 27.9 30.4 30.3 30.2 27.3 32.8 26.7 32.6 0.0 5414.4 32.8 32.6 74 54 21.4 8 902.4 32.8 30.9 33.0 32.8 30.4 30.3 31.9 31.7 10.3 7219.2 43.3 43.1 74 54 10.9 3 915.0 46.0 52.2 52.8 52.6 53.2 50.7 52.7 53.0 -1.7 2745.0 51.5 51.3 74 54 2.7 4 915.0 35.0 37.1 38.9 38.7 37.2 37.9 36.8 37.7 3.1 3660.0 42.0 41.8 74 54 12.2 5 915.0 35.7 34.8 36.0 35.8 34.6 35.4 33.6 35.2 6.1 4575.0 42.1 41.9 74 54 12.1 8 915.0 31.6 30.9 33.3 33.1 30.2 29.8 30.2 30.0 10.9 7320.0 44.2 44.0 74 54 10.0 3 926.8 43.0 48.6 50.6 50.4 50.7 49.4 50.0 50.5 -1.5 2780.4 49.2 49.0 74 54 5.0 4 926.8 31.8 33.5 34.4 34.2 33.7 33.8 31.5 33.6 3.4 3707.2 37.8 37.6 74 54 16.4 5 926.8 31.2 32.0 32.1 31.9 32.1 29.1 29.8 31.9 6.3 4634.0 38.4 38.2 74 54 15.8 8 926.8 29.6 29.0 29.6 29.4 32.8 30.9 33.0 32.8 11.6 7414.4 44.6 44.4 74 54 9.6 Column numbers (see below for explanations) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Column #1. hrm = Harmonic; BE = Band Edge emissions Column #2. Frequency of Transmitter. Column #3. Uncorrected readings from the spectrum analyzer with First Axis Rotation. Column #4. Uncorrected readings from the spectrum analyzer with Second Axis Rotation. Column #5. Uncorrected readings from the spectrum analyzer with Third Axis Rotation. Column #6. Average Reading based on peak reading reduced by the Duty cycle correction Column #7. Uncorrected readings from the spectrum analyzer with First Axis Rotation. Column #8. Uncorrected readings from the spectrum analyzer with Second Axis Rotation. Column #9. Uncorrected readings from the spectrum analyzer with Third Axis Rotation. Column #10. Average Reading based on peak reading reduced by the Duty cycle correction Column #11. Corr. Factors = Cable Loss – Preamp Gain + Antenna Factor Column #12. Frequency of Tested Emission Column #13. Highest peak field strength at listed frequency. Column #14. Highest Average field strength at listed frequency. Column #15. Peak Limit. Column #16. Average Limit. Column #17. The margin (last column) is the worst case margin under the peak or average limits for that row. Overall Judgment: Passed by 1.5 dB No other Emissions were detected from 30 to 9300 MHz within 8 dB of the limits, in the restricted bands RP-9012B Rev. 1 Page 21 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Radiated emissions in a graphical format. The above charts are the same data as the previous table. RP-9012B Rev. 1 Page 22 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Figure 2. Drawing of Radiated Emissions Setup Chamber E, anechoic EUT was standing on an 80 cm table below 1 GHz, Antenna and a 150 cm table above For Radiated 1 GHz. The table was on Emissions a flush turntable EUT Notes: Spectrum Preamp  Not to Scale Analyzer  Antenna height varied 1-4 meters  Distance from antenna to tested system is 3 meters Receive Pre- Spectrum High Pass Frequency Range Antenna Amplifier Analyzer Filter 30 to 200 MHz ANT-04 Internal REC-21 None* 200 to 1000 MHz ANT-06 Internal REC-21 None* 1 to 10 GHz ANT-36 AMP-05 REC-21 HPF-07 * A high pass filter was not needed since the fundamental frequency was outside of the amplifiers pass band. 11.6 Unintentional Emissions (Receive Mode) Manufacturer New Cosmos Electric Co., Ltd. Specification FCC Part 15.209 Model ML-310CE Test Date January 21, 2019 Serial Number 01350050092B71B Test Distance 3 Meters Abbreviations Pol = Antenna Polarization; V = Vertical; H = Horizontal; P = peak; Q = QP Notes Corr. Factors = Cable Loss – Preamp Gain External preamp used above 1 GHz Configuration Receive mode Meter Dist Margin Freq. Reading Ant. Ant Cbl/amp Fact EUT Limit Under MHz dBuV Dect. Pol. Factor Factors dB dBuV/m dBuV/m Limit dB Note 68.7 8.6 P H 9.2 0.6 0.0 18.4 40.0 21.6 126.8 8.3 P H 12.0 0.9 0.0 21.2 43.5 22.3 189.1 8.5 P H 13.8 1.1 0.0 23.4 43.5 20.1 250.6 8.7 P H 11.9 1.3 0.0 21.9 46.0 24.1 354.8 9.2 P H 14.8 1.7 0.0 25.7 46.0 20.3 482.4 10.3 P H 16.9 2.0 0.0 29.2 46.0 16.8 601.3 9.9 P H 18.6 2.2 0.0 30.7 46.0 15.3 780.0 10.7 P H 21.6 2.6 0.0 34.9 46.0 11.1 975.0 7.8 P H 22.5 2.9 0.0 33.2 54.0 20.8 1527.5 42.5 P H 25.7 -32.6 0.0 35.6 74.0 38.4 1 RP-9012B Rev. 1 Page 23 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Meter Dist Margin Freq. Reading Ant. Ant Cbl/amp Fact EUT Limit Under MHz dBuV Dect. Pol. Factor Factors dB dBuV/m dBuV/m Limit dB Note 1927.5 41.7 P H 27.8 -32.0 0.0 37.5 74.0 36.5 1 2250.0 39.4 P H 27.7 -31.8 0.0 35.3 74.0 38.7 1 2552.5 40.9 P H 28.8 -31.2 0.0 38.5 74.0 35.5 1 2847.5 42.0 P H 29.2 -30.7 0.0 40.5 74.0 33.5 1 3152.5 40.8 P H 30.9 -29.9 0.0 41.8 74.0 32.2 1 3465.0 39.6 P H 31.2 -29.7 0.0 41.1 74.0 32.9 1 3940.0 40.3 P H 32.9 -29.2 0.0 44.0 74.0 30.0 1 61.8 9.7 P V 9.2 0.6 0.0 19.5 40.0 20.5 133.6 10.1 P V 12.3 0.9 0.0 23.3 43.5 20.2 191.3 8.5 P V 13.9 1.2 0.0 23.6 43.5 19.9 243.8 7.9 P V 11.5 1.3 0.0 20.7 46.0 25.3 360.1 9.0 P V 14.6 1.7 0.0 25.3 46.0 20.7 487.7 10.0 P V 17.3 2.0 0.0 29.3 46.0 16.7 583.8 11.8 P V 18.3 2.2 0.0 32.3 46.0 13.7 708.8 11.7 P V 20.7 2.4 0.0 34.8 46.0 11.2 837.5 10.5 P V 22.5 2.7 0.0 35.7 46.0 10.3 986.3 10.9 P V 22.7 2.9 0.0 36.5 54.0 17.5 1347.5 41.3 P V 25.6 -32.7 0.0 34.2 74.0 39.8 1 1442.5 42.0 P V 25.5 -32.6 0.0 34.9 74.0 39.1 1 1695.0 42.4 P V 26.2 -32.5 0.0 36.1 74.0 37.9 1 1757.5 42.3 P V 26.7 -32.4 0.0 36.6 74.0 37.4 1 1945.0 42.8 P V 27.8 -32.0 0.0 38.6 74.0 35.4 1 2230.0 40.5 P V 27.7 -31.8 0.0 36.4 74.0 37.6 1 2357.5 41.3 P V 28.2 -31.6 0.0 37.9 74.0 36.1 1 2492.5 42.0 P V 28.6 -31.4 0.0 39.2 74.0 34.8 1 2642.5 41.8 P V 29.0 -30.9 0.0 39.9 74.0 34.1 1 2887.5 43.1 P V 29.4 -30.6 0.0 41.9 74.0 32.1 1 3245.0 40.0 P V 31.1 -30.0 0.0 41.1 74.0 32.9 1 3335.0 42.0 P V 31.2 -29.9 0.0 43.3 74.0 30.7 1 3355.0 40.8 P V 31.2 -29.9 0.0 42.1 74.0 31.9 1 3630.0 40.3 P V 31.6 -29.7 0.0 42.2 74.0 31.8 1 3937.5 41.0 P V 32.9 -29.2 0.0 44.7 74.0 29.3 1 Note 1: All Peak readings above 1 GHz were under the Average limits, so average readings are not required. Judgment: Passed by 10.3 dB RP-9012B Rev. 1 Page 24 of 25

Radiometrics Midwest Corporation www.radiomet.com Testing of the New Cosmos Electric Co. Ltd., Model ML-310CE, Methane Detector Radiated emissions in a graphical format. The above chart is the same data as the previous table. 11.6.1 Measurement Instrumentation Uncertainty Measurement Uncertainty Radiated Emissions, E-field, 3 meters, 30 to 200 MHz 3.3 dB Radiated Emissions, E-field, 3 meters, 200 to 1000 MHz 4.9 dB Radiated Emissions, E-field, 3 meters, 1 to 18 GHz 4.8 dB Bandwidth using marker delta method at a span of 500 kHz 4 kHz 99% Occupied Bandwidth using REC-43 1% of frequency span Conducted power at 915 MHz 0.8 dB Amplitude measurement 1-10,000 MHz 1.5 dB Temperature THM-02 0.6 Deg C The uncertainties represent expanded uncertainties expressed at approximately the 95% confidence level using a coverage factor of k=2 in accordance with CISPR 16-4-2. RP-9012B Rev. 1 Page 25 of 25


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Document Modified: 2019-03-04 13:59:23
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