2A2X4-DTS27DDTS27 (Indirect Meter)

DTS27 (Direct Meter) Operating Manual ShenzhenStarInstrumentCo.,Ltd. Caution:Theuseriscautionedthatchangesormodificationsnotexpresslyapprovedbytheparty responsibleforcompliancecouldvoidtheuser'sauthoritytooperatetheequipment. ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions: (1)thisdevicemaynotcauseharmfulinterference,and(2)thisdevicemustacceptanyinterference received,includinginterferencethatmaycauseundesiredoperation. NOTE:ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice, pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotectionagainst harmfulinterferenceinaresidentialinstallation.Thisequipmentgenerates,usesandcanradiateradio frequencyenergyand,ifnotinstalledandusedinaccordancewiththeinstructions,maycauseharmful interferencetoradiocommunications.However,thereisnoguaranteethatinterferencewillnotoccurina particularinstallation. Ifthisequipmentdoescauseharmfulinterferencetoradioortelevisionreception,whichcanbe determinedbyturningtheequipmentoffandon,theuserisencouragedtotrytocorrecttheinterference byoneormoreofthefollowingmeasures: Reorientorrelocatethereceivingantenna. Increasetheseparationbetweentheequipmentandreceiver. Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiveris connected. Consultthedealeroranexperiencedradio/TVtechnicianforhelp. FCCRadiationExposureStatement: ThisequipmentcomplieswithFCCradiationexposurelimitssetforthforanuncontrolledenvironment. Thistransmittermustnotbeco-locatedoroperatinginconjunctionwithanyotherantennaortransmitter. Thisequipmentshouldbeinstalledandoperatedwithaminimumdistanceof20cmbetweentheradiator andyourbody. RevisionHistory RevisionDateVersionRecordDescriptionofMajorChanges 20241218InitialDraft 20250306AdjustedFormat,Header TableofContents Three-phaseDirect-connectMeterDTS27(DirectMeter)OperatingManual..1 ShenzhenStarInstrumentCo.,Ltd............................................................1 RevisionHistory.........................................................................................3 TableofContents.......................................................................................4 1ElectricityMeterIntroduction.........................................................................6 1.1TechnicalParameters..........................................................................6 1.2ElectricalPerformance.........................................................................6 1.3InsulationPerformance........................................................................6 1.4OperatingEnvironment........................................................................7 1.5CommunicationInterface.....................................................................7 1.6StandardsCompliance.........................................................................8 2StructureDescription.....................................................................................8 2.1Appearance..........................................................................................8 2.2MeterStructureDimensions................................................................9 2.3WiringDiagram..................................................................................10 ElectricityMeterIntroduction..........................................................................10 2.4BasicEnergy......................................................................................10 2.5Per-phaseEnergy(OnlyforPoly-phaseMeters)...............................11 2.1Demand.............................................................................................12 2.2MaximumDemand.............................................................................13 2.3DemandStorageandClearance.......................................................14 3InstantaneousValues..................................................................................14 3.1BasicInstantaneousValues...............................................................15 3.2OtherInstantaneousValues...............................................................16 4Clock(OnlyforMeterswithBattery)...........................................................16 4.1ClockAccuracy..................................................................................17 5HumanMachineInterface...........................................................................17 5.1DisplayButton....................................................................................17 5.2Keypad(Optional)..............................................................................17 5.3BacklightIndicator.............................................................................18 5.4Display...............................................................................................18 5.4.1LCDDisplayContentDescription.............................................18 5.4.2Auto-scrollDisplay....................................................................20 5.4.3Button-triggeredDisplay...........................................................21 5.4.4PopupDisplay..........................................................................21 5.4.5PowerLossDisplay..................................................................21 5.5LEDIndicators...................................................................................22 5.5.1PulseIndicator..........................................................................22 5.5.2AlarmIndicator..........................................................................22 5.5.3Credit/PowerIndicator..............................................................23 6LoadManagement......................................................................................23 6.1LoadControl......................................................................................23 7RelayControl...................................................................................…

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Shenzhen Star Instrument Co., Ltd. U.S. Agent Designation for Service of Process (Applicant and U.S. Agent are Separate Parties) TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTENTION: FCC Certification - Section 2.911(d)(7) Information Desi,nated U.S. Aqent Company Name: United Consulting Te chnology Services Co,, Ltd. FRN: 0033495714 Contact Name: David Wu Street Add「ess: 17800 CASTLETON ST STE 665 CITY OF INDUSTRY CA 91748 United States Te lephone No: (626) 217-4022 Email: [email protected] This letter is to confirm that we ("the Designated U.S. Agent) have accepted the responsibility to act as the Designated U.S. Agent for Service of Process as required by section 47 CFR 2.911 (d)(7) on behalf of the Applicant noted below. U.S. Agent Signature: Date: 2026/1/4 Signed by (Printed Name/Title): David Wu/CEO The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information above changes. Applicant Company name: Shenzhen Star Instrument Co., Ltd. FRN: 0031293970 Grantee Code: 2A2X4 FCC ID: 2A2X4-DDS26D, 2A2X4-DTS27D, 2A2X4-DTS271, 2A2X4-TG33 Contact Name: Wenzhou Li Street Address: Star Industry Pa戊BaolongIndustry City这四gangDistrict,Shenzhen,China City/P「ovince/Zip:shenzhen, N/A, N/A Te lephone No: 1392656811 O Email: [email protected] Applicant Signature: W 归加旮 Date: 2026/1/4 Signed by (Printed Name/Title): Wenzhou Li / {$title}�,�r:P'

SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-02 Rev 1.1 Page: 1 of 4 Appendix External Photos for GZCR2511001771MD SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-02 Rev 1.1 Page: 2 of 4 EUT Constructional Details (EUT Photos) RF ANT SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-02 Rev 1.1 Page: 3 of 4 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-02 Rev 1.1 Page: 4 of 4 - End of the Appendix -

39 Medidor electrónico trifásico inteligente FCC ID: 2A2X4-DTS27D

SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 1 of 9 Appendix Internal Photos for GZCR2511001771MD SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 2 of 9 EUT Constructional Details (EUT Photos) SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 3 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 4 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 5 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 6 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 7 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 8 of 9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-03 Rev 1.1 Page: 9 of 9 - End of the Appendix -

SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 1 of 9 FCC ID: 2A2X4-DTS27D RF EXPOSURE EVALUATION REPORT Application No.: GZCR2511001771MD Applicant:Shenzhen Star Instrument Co., Ltd Address of Applicant:Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Manufacturer:Shenzhen Star Instrument Co., Ltd Address of Manufacturer:Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Factory:Shenzhen Star Instrument Co., Ltd Address of Factory:Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Product Name:DTS27 (Indirect Meter) Model No.: DTS27 (Indirect Meter) Trade Mark:Shenzhen Star Instrument Co., Ltd Standard(s) : KDB 447498 D01 V06 47 CFR Part 1.1310 Date of Receipt: 2025-11-11 Date of Evaluation: 2025-12-18 Date of Issue: 2026-03-20 Evaluation Result: Pass* * In the configuration evaluated, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 2 of 9 Revision Record VersionReport No.DateRemark 01GZCR2511001771032026-03-20Original Authorized for issue by: Key Liang/Project Engineer Approved By Vico Cui/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 3 of 9 2Evaluation Summary ItemStandardMethodRequirementResult RF Exposure KDB 447498 D01 V06 KDB 447498 D01 V0647 CFR Part 1.1310Pass Note: E.U.T./EUT means Equipment Under Test. Pass means the test result passed the test standard requirement, please find the detailed decision rule in the report relative section. SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 4 of 9 3Contents Page 1Cover Page...............................................................................................................................................1 2Evaluation Summary................................................................................................................................3 3Contents....................................................................................................................................................4 4General Information.................................................................................................................................5 4.1Details of E.U.T.................................................................................................................................5 4.2Evaluating Location...........................................................................................................................5 4.3Facility...............................................................................................................................................5 4.4Deviation from Standards..................................................................................................................6 4.5Abnormalities from Standard Conditions...........................................................................................6 5Technical Requirements Specification..................................................................................................7 5.1General Description of Applied Standards........................................................................................7 5.2RF Exposure Evaluation....................................................................................................................7 5.2.1Limit & Test Method......................................................................................................................7 5.2.2Conclusion....................................................................................................................................8 6EUT Constructional Details (EUT Photos).............................................................................................9 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 5 of 9 4General Information 4.1Details of E.U.T. Power supply:AC 3*220/380V, 50Hz Battery operation: DC 3.6V for internal lithium battery as below: Model: ER14250 Rated: DC 3.6 V Size: 1/2AA RF Character:Please refer to section 4.1 of test report GZCR251100177102 for details. Remark: The information in this section is provided by the applicant or manufacturer, SGS is not liable to the accuracy, suitability, reliability or/and integrity of the information. 4.2Evaluating Location All tests were performed at: SGS-CSTC Standards Technical Services Co., Ltd., Guangzhou Branch EMC Laboratory, No.198, Kezhu Road, Science City, Economic & Technological Development Area, Guangzhou, Guangdong, China 510663 Tel: +86 20 82155555 No tests were sub-contracted. SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-03 Rev 2.0 Report No.: GZCR251100177103 Page: 6 of 9 4.3Facility The facility is recognized, certified, or accredited by the following organizations: ● ACMA SGS-CSTC Standards Technical Services Co., Ltd., EMC Laboratory can also perform testing for the Australian/New Zealand Regulatory Compliance Mark (RCM). ● SGS UK(Certificate No.: 32), SGS-TUV SAARLAND and SGS-FIMKO Have approved SGS-CSTC Standards Technical Services Co., Ltd., EMC Laboratory as a supplier of EMC TESTING SERVICES and SAFETY TESTING SERVICES. ● FCC Recognized Accredited Test Firm(Registration No.: 486818) SGS-CSTC Standards Technical Services Co., Ltd., EMC Laboratory has been accredited and fully described in a report filed with the (FCC) Federal Communications Commission. The acceptance letter from the FCC is maintained in our files. Designation Number: CN5016, Test Firm Registration Number: 486818. ● ISED (Registration No.: 4620B, CAB identifier: CN0052) SGS-CSTC Standards Technical Services Co., Ltd., has …

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Antenna 1. Antenna Name: 4G Suction Cup Antenna 2. Radiation Pattern: 3. Antenna Frequency Bands: 698-960/1710-2700MHz, Antenna Gain: 2.0/3.0dBi Band (MHz) Gain (dBi) Band (MHz) Gain (dBi) Band (MHz) Gain (dBi) Band (MHz) Gain (dBi) 700 1.29 1710 0.59 1860 -0.7 2130 -1.03 710 1.56 1720 0.84 1870 -0.58 2140 -1.4 720 0.38 1730 0.5 1880 -0.33 2150 -1.3 730 -0.76 1740 -0.15 1890 -0.68 2160 -1.04 740 -0.54 1750 -0.78 1900 -0.91 2170 -0.71 750 -0.95 1760 -0.92 1910 -0.9 2180 -0.22 760 -0.82 1770 -0.95 1920 -1.16 2190 -0.21 770 -1 1780 -1.21 1930 -0.65 2200 0.06 780 -0.58 1790 -1.32 1940 -0.93 2210 -0.36 790 -1.21 1800 -1.03 1950 -0.36 2220 -0.42 800 -0.81 1810 -0.88 1960 -0.75 2230 -0.35 810 0.4 1820 -1.37 1970 -0.46 2240 -0.55 820 1.08 1830 -1.11 1980 -0.23 2250 -0.6 830 1.27 1840 -1.03 1990 -0.08 2260 -0.37 840 1.59 1850 -0.52 2000 -0.44 2270 -0.3 850 1.65 2010 -0.55 860 1.29 2020 -0.38 870 0.79 2030 -0.82 880 0.54 2040 -1.46 890 0.75 2050 -1.33 900 0.1 2060 -1.41 910 0.02 2070 -1.5 920 -0.17 2080 -1.68 930 -0.55 2090 -1.49 940 -0.59 2100 -1.64 950 -1.35 2110 -1.42 960 -1.89 2120 -1.19 Band (MHz) Gain (dBi) Band (MHz) Gain (dBi) 2280 -0.37 2550 -2 2290 -0.68 2560 -1.36 2300 -0.77 2570 -2.05 2310 -0.96 2580 -1.21 2320 -1.03 2590 -1.5 2330 -0.51 2600 -1.37 2340 -0.44 2610 -1.35 2350 -0.41 2620 -1.25 2360 -0.32 2630 -1 2370 -0.18 2640 -1.15 2380 -0.12 2650 -0.92 2390 -0.36 2660 -0.19 2400 -0.21 2670 0.06 2410 -0.51 2680 0.39 2420 -0.16 2690 1.29 2430 -0.7 2440 -0.78 2450 -1.05 2460 -1.17 2470 -1.21 2480 -1.41 2490 -1.22 2500 -1.35 2510 -1.26 2520 -1.21 2530 -1.66 2540 -1.47 4. Antenna Manufacturer English Name: toppoint technology, Address: Toppoint Technology Industrial Park, No.99 Songyu Fourth Road, Baimiao Economic Development Zone, Yicheng City, Hubei Province, China. 5. Antenna Dimensions: Total Antenna Height: 310±3 (mm) Suction Cup Diameter: 29.6mm Cable Length: 1500±30 (mm)

SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-01 Rev 2.1 Report No.: GZCR251100177102 Page: 1 of 66 FCC ID: 2A2X4-DTS27D TEST REPORT Application No.: GZCR2511001771MD Applicant: Shenzhen Star Instrument Co., Ltd Address of Applicant: Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Manufacturer: Shenzhen Star Instrument Co., Ltd Address of Manufacturer: Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Factory: Shenzhen Star Instrument Co., Ltd Address of Factory: Star Industry Park, Baolong Industry City, Longgang District, Shenzhen, China Product Name: DTS27 (Indirect Meter) Model No.: DTS27 (Indirect Meter) Trade Mark: Shenzhen Star Instrument Co., Ltd Standard(s) : 47 CFR Part 15, Subpart C 15.247 Date of Receipt: 2025-11-11 Date of Test: 2025-12-01 to 2026-03-13 Date of Issue: 2026-03-20 Test Result: Pass* * In the configuration tested, the EUT complied with the standards specified above. SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-01 Rev 2.1 Report No.: GZCR251100177102 Page: 2 of 66 Revision Record Version Report No. Date Remark 01 GZCR251100177102 2026-03-23 Original Authorized for issue by: Key Liang/Project Engineer Approved By Vico Cui/Reviewer SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-01 Rev 2.1 Report No.: GZCR251100177102 Page: 3 of 66 2 Test Summary Radio Spectrum Technical Requirement Item Standard Method Requirement Result Antenna Requirement 47 CFR Part 15, Subpart C 15.247 N/A 47 CFR Part 15, Subpart C 15.203 & 15.247(b)(4) Pass Other requirements Frequency Hopping Spread Spectrum System Hopping Sequence N/A 47 CFR Part 15, Subpart C 15.247(a)(1),(g),(h) Pass Radio Spectrum Matter Part Item Standard Method Requirement Result Conducted Emissions at AC Power Line (150kHz-30MHz) 47 CFR Part 15, Subpart C 15.247 ANSI C63.10 (2020) Section 6.2 47 CFR Part 15, Subpart C 15.207 Pass Radiated Emissions which fall in the restricted bands ANSI C63.10 (2020) Section 6.10.5 & 7.8.8 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass Radiated Spurious Emissions Below 1GHz ANSI C63.10 (2020) Section 6.4,6.5 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass** Radiated Spurious Emissions Above 1GHz ANSI C63.10 (2020) Section 6.6 & 7.8.8 47 CFR Part 15, Subpart C 15.205 & 15.209 Pass** Maximum Conducted Output Power ANSI C63.10 (2020) Section 7.8.5 47 CFR Part 15, Subpart C 15.247(b)(2) Pass 20dB Bandwidth ANSI C63.10 (2020) Section 6.9.2 47 CFR Part 15, Subpart C 15.247(a)(1) Pass** Carrier Frequencies Separation ANSI C63.10 (2020) Section 7.8.2 47 CFR Part 15, Subpart C 15.247a(1) Pass** Hopping Channel Number ANSI C63.10 (2020) Section 7.8.3 47 CFR Part 15, Subpart C 15.247a(1)(i) Pass Dwell Time ANSI C63.10 (2020) Section 7.8.4 47 CFR Part 15, Subpart C 15.247a(1)(i) Pass Conducted Band Edges Measurement ANSI C63.10 (2020) Section 7.8.7.2 47 CFR Part 15, Subpart C 15.247(d) Pass Conducted Spurious Emissions ANSI C63.10 (2020) Section 7.8.7 47 CFR Part 15, Subpart C 15.247(d) Pass Note: E.U.T./EUT means Equipment Under Test. Pass means the test result passed the test standard requirement, please find the detailed decision rule in the report relative section. SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-TRF-01 Rev 2.1 Report No.: GZCR251100177102 Page: 4 of 66 3 Contents Page 1 Cover Page ................................................................................................................................................. 1 2 Test Summary ............................................................................................................................................ 3 3 Contents ..................................................................................................................................................... 4 4 General Information ................................................................................................................................... 6 4.1 Details of E.U.T. .................................................................................................................................. 6 4.2 Description of Support Units ............................................................................................................... 6 4.3 Measurement Uncertainty ................................................................................................................... 7 4.4 Test Location ....................................................................................................................................... 7 4.5 Test Facility ......................................................................................................................................... 8 4.6 Deviation from Standards .................................................................................................................... 8 4.7 Abnormalities from Standard Conditions ............................................................................................ 8 5 Equipment List ........................................................................................................................................... 9 6 Radio Spectrum Technical Requirement .............................................................................................. 11 6.1 Antenna Requirement ....................................................................................................................... 11 6.1.1 Test Requirement: ........................................................................................................................ 11 6.1.2 Conclusion .................................................................................................................................... 11 6.2 Other requirements Frequency Hopping Spread Spectrum System Hopping Sequence................. 12 6.2.1 Test Requirement: ..............................................…

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SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-04 Rev 1.1 Page: 1 of 5 Appendix Test Setup Photo for GZCR251100177102 Test Model No.: DTS27 SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-04 Rev 1.1 Page: 2 of 5 Test Setup Photo Conducted Emissions at AC Power Line (150kHz-30MHz) SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-04 Rev 1.1 Page: 3 of 5 Radiated Spurious Emissions 30MHz to 1GHz & Radiated Emissions which fall in the restricted bands SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-04 Rev 1.1 Page: 4 of 5 Radiated Spurious Emissions Below 30MHz SGS-CSTC Standards Technical Services Co., Ltd. Guangzhou Branch EMC-ARF-04 Rev 1.1 Page: 5 of 5 Radiated Spurious Emissions Above 1GHz - End of the Appendix -