ETSI EN 300 330 V1.2.2 (1999-05)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Short Range Devices (SRD); Technical characteristics and test methods for radio equipment in the frequency range 9 kHz to 25 MHz and inductive loop systems in the frequency range 9 kHz to 30 MHz33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.20Sprejemna in oddajna opremaReceiving and transmitting equipmentICS:Ta slovenski standard je istoveten z:EN 300 330 Version 1.2.2PSIST EN 300 330:2000en01-januar-2000PSIST EN 300 330:2000SLOVENSKI
STANDARD
EN 300 330 V1.2.2 (1999-05)Candidate Harmonized European Standard (Telecommunications series)Electromagnetic compatibilityand Radio spectrum Matters (ERM);Short Range Devices (SRD);Technical characteristics and test methods forradio equipment in the frequency range 9 kHz to 25 MHz andinductive loop systems in the frequency range 9 kHz to 30 MHzPSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)2ReferenceREN/ERM-RP08-0108 (32000ipc.PDF)KeywordsSRD, radio, testingETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88Internetsecretariat@etsi.frIndividual copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: editor@etsi.frCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1999.All rights reserved.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)3ContentsIntellectual Property Rights.6Foreword.6Introduction.71Scope.82References.93Definitions, symbols and abbreviations.93.1Definitions.93.2Symbols.103.3Abbreviations.104General.104.1Presentation of equipment for testing purposes.104.1.1Choice of model for testing.114.1.2On-site testing.114.2Mechanical and electrical design.114.2.1General.114.2.2Controls.114.2.3Transmitter shut-off facility.114.2.4Receiver mute or squelch.114.2.5Marking (equipment identification).114.2.5.1Equipment identification.114.2.5.2Regulatory marking.124.3Declarations by the applicant.124.4Auxiliary test equipment.124.5Interpretation of the measurement results.125Test conditions, power sources and ambient temperatures.125.1Normal and extreme test conditions.125.2Test power source.125.2.1External test power source.125.2.2Internal test power source.135.3Normal test conditions.135.3.1Normal temperature and humidity.135.3.2Normal test power source.135.3.2.1Mains voltage.135.3.2.2Regulated lead-acid battery power sources.135.3.2.3Other power sources.135.4Extreme test conditions.145.4.1Extreme temperatures.145.4.1.1Procedure for tests at extreme temperatures.145.4.1.1.1Procedure for equipment designed for continuous operation.145.4.1.1.2Procedure for equipment designed for intermittent operation.145.4.1.2Extreme temperature ranges.145.4.2Extreme test source voltages.155.4.2.1Mains voltage.155.4.2.2Regulated lead-acid battery power sources.155.4.2.3Power sources using other types of batteries.155.4.2.4Other power sources.156General conditions.156.1Normal test signals and test modulation.156.1.1Normal test signals for analogue speech.166.1.2Normal test signals for data.166.2Artificial antenna.16PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)46.2.1Artificial antenna for inductive transmitters (non 50 W).166.2.2Artificial antenna for transmitters with 50 W impedance connector.166.3Test fixture.176.4Test sites and general arrangements for radiated measurements.176.5Modes of operation of the transmitter.176.6Measuring receiver.177Transmitter requirements.187.1Transmitter definitions.187.1.1The inductive loop coil transmitters.187.1.2The large size loop transmitters.187.1.3Other transmitters.197.1.4Product classes.197.2Transmitter carrier output levels.207.2.1H-field (radiated).207.2.1.1Definition.207.2.1.2Methods of measurement.207.2.1.3Limits.217.2.2RF carrier current.217.2.2.1Definition.217.2.2.2Methods of measurement.217.2.2.3Limits.227.2.3Radiated E-field (Class 4).227.2.3.1Definition.227.2.3.2Methods of measurement.227.2.3.3Limits.227.3Permitted frequency range of the modulation bandwidth.237.3.1Definition.237.3.2Method of measurement.237.3.3Limits.237.4Spurious emissions.247.4.1Definition.247.4.2Conducted spurious emissions.247.4.2.1Methods of measurement (< 30 MHz).247.4.2.2Limits.247.4.2.3Methods of measurement (³ 30 MHz).247.4.2.4Limits.257.4.3Radiated field strength.257.4.3.1Methods of measurement (< 30 MHz).257.4.3.2Limits.257.4.4Effective radiated power.267.4.4.1Methods of measurement (³ 30 MHz).267.4.4.2Limits.278Receiver requirement.278.1Receiver spurious radiation.278.1.1Definition.278.1.2Methods of measurement.278.1.3Limits.278.1.3.1Radiated emissions below 30 MHz:.278.1.3.2Radiated emissions above 30 MHz.279Measurement uncertainty.28Annex A (normative):Radiated measurements.29A.1Test sites and general arrangements for measurements involving the use of radiated fields.29A.1.1Outdoor test site.29A.1.1.1Standard position.30A.1.2Test antenna.30A.1.2.1Below 30 MHz.30A.1.2.2Above 30 MHz.30PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)5A.1.3Substitution antenna.30A.1.4Optional additional indoor site.31A.2Guidance on the use of radiation test sites.32A.2.1Measuring distance.32A.2.2Test antenna.32A.2.3Substitution antenna.32A.2.4Artificial antenna.32A.2.5Auxiliary cables.32A.3Further optional alternative indoor test site using an anechoic chamber.33A.3.1Example of the construction of a shielded anechoic chamber.33A.3.2Influence of parasitic reflections in anechoic chambers.33A.3.3Calibration of the shielded RF anechoic chamber.34Annex B (normative):Transmitter carrier limits.36Annex C (normative):Transmitter (RF carrier current * antenna area) limit for large sizeloop.37Annex D (normative):H-field limit correction factor for generated E-fields.38Annex E (normative):Spurious limits, radiated H-field at 10 m distances.39Annex F (normative):Customized loop antennas.40F.1Equipment classes related to the antenna loop.40F.1.1Antenna loops below 1 MHz.40F.1.2Antenna loops above 1 MHz.41Annex G (normative):Subclauses of the present document relevant for compliance with theessential requirements of relevant EC Council Directives.42Annex H (informative):Test fixture for measuring inductive transmitter carrier andharmonic currents by use of an artificial antenna (Class 3 only).43Annex J (informative):E-fields in the near field at low frequencies.45Annex K (normative):H-field measurements at other distances than 10 m.46Annex L (normative):Transmitter requirements overview.49Annex M (normative):Low level transmitter spectrum mask measurements.50Bibliography.51History.52PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)6Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical CommitteeElectromagnetic compatibility and Radio spectrum Matters (ERM).The present document together with ETS 300 683 [5], is intended to become a Harmonized Standard, the reference ofwhich will be published in the Official Journal of the European Communities referencing the Council Directive on theapproximation of the laws of the Member States relating to electromagnetic compatibility ("the EMC Directive")(89/336/EEC [1] as amended).The technical parameters which are relevant to the EMC Directive are listed in normative annex G.National transposition datesDate of adoption of this EN:9 April 1999Date of latest announcement of this EN (doa):31 July 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 January 2000Date of withdrawal of any conflicting National Standard (dow):31 July 2002PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)7IntroductionThe present document is drafted on the assumption that type test measurements, performed in an accredited testlaboratory will be accepted by the various National Regulatory authorities in order to grant type approval, provided theNational Regulatory requirements are met. This is in compliance with CEPT/ERC Recommendation T/R 01-06 [2].Included are methods of measurement for equipment, such as inductive loop systems, fitted with antenna connectorand/or integral antennas. Equipment designed for use with an integral antenna may be supplied with a temporary orpermanent internal connector for the purpose of testing, providing the characteristics being measured are not expected tobe affected.If equipment, which is available on the market, is required to be checked it should be tested in accordance with themethods of measurement specified in the present document.Clauses 1 and 3 provide a general description on the types of equipment covered by the present document and thedefinitions and abbreviations used. Clause 4 provides as a guide the number of samples required in order that type testsmay be carried out and any markings on the equipment which the applicant has to provide.Clauses 5 and 6 provide general test conditions to be used.Clauses 7 and 8 specify the spectrum utilization parameters which are required to be measured. These are maximumlimits which have been chosen to minimize harmful interference to other equipment or services. The clauses providedetails on how the equipment should be tested and the conditions which should be applied.Clause 9 gives the maximum measurement uncertainty values.Annex A provides normative specifications concerning radiated measurements.Annexes B through E are normative graphical representations of Radio Frequency (RF) carrier current limits, H- andE-field strength carrier limits and spurious emission limits.Annex F is normative describing the calculation guidelines for customized antennas.Annex G is normative and details the parameters which are which are required to be measured for compliance with theEC Council Directive 89/336/EEC [1], ("the EMC Directive").Annexes H and J are informative annexes describing test fixtures and E-fields.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)81ScopeThe present document covers the minimum characteristics considered necessary for Short Range Devices (SRDs) inorder to make the best use of the available frequencies.The present document is a generic standard for the frequency band 9 kHz to 25 MHz for radio equipment and 9 kHz to30 MHz for inductive loop systems, which may be superseded by specific standards covering specific applications.The present document contains the technical characteristics for radio equipment and is referencingCEPT/ERC Decisions and Recommendation for SRDs CEPT/ERC Recommendation 70-03 [3].The present document does not necessarily include all the characteristics which may be required by a user, nor does itnecessarily represent the optimum performance achievable.The present document applies to generic SRDs which are not covered by other specific product standards such as:-inductive loop systems;-with an antenna connection and/or with an integral antenna;-for alarms, identification systems, telecommand, telemetry, etc.;-applications with or without speech.The parameters in clauses 7 and 8 of the present document are considered as spectrum utilization parameters. It isintended that these parameters will be measured by an accredited test laboratory for the purpose of type testing andapproval.The present document covers fixed stations, mobile stations and portable stations. If a system includes transponders,these are measured together with the transmitter.All types of modulation for radio devices are covered by the present document, provided the requirements ofsubclause 7.3 are met.Three types of measuring methods are defined in the present document due to the varied nature of the types ofequipment used in this band. One method measures the RF carrier current, another measures the radiated H-field and thethird the conducted power.On non-harmonized parameters, national administrations may impose conditions on the type of modulation, frequency,channel / frequency separations, maximum transmitter radiated field strength / maximum output current to a definedantenna, duty cycle, equipment marking and the inclusion of an automatic transmitter shut-off facility, as a condition forthe issue of an individual or general licence, or as a condition for use under licence exemption.The present document covers requirements for radiated emissions below as well as above 30 MHz.Additional standards or specifications may be required for equipment such as that intended for connection to the PublicSwitched Telephone Network (PSTN).PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)92ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]89/336/EEC: "Council Directive on the approximation of the laws of the Member States relating toelectromagnetic compatibility".[2]CEPT/ERC Recommendation T/R 01-06: "Procedures for type testing and approval for radioequipment intended for non-public systems".[3]CEPT/ERC Recommendation 70-03 (1997): "Relating to the use of Short Range Devices (SRD)".[4]ETR 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in themeasurement of mobile radio equipment characteristics".[5]ETS 300 683 (1997): "Radio Equipment and Systems (RES); ElectroMagnetic Compatibility(EMC) standard for Short Range Devices (SRD) operating on frequencies between 9 kHz and25 GHz".[6]ITU-T Recommendation O.153: "Basic parameters for the measurement of error performance at bitrates below the primary rate".3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following definitions apply:alarm: use of radio communication for indicating an alarm condition at a distant location.artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicant.assigned frequency band: frequency band within which the device is authorized to operate.conducted measurements: measurements which are made using a direct connection to the equipment under test.customized antenna: antenna build according to manufacturers antenna design rules inside type tested limits.dedicated antenna: removable antenna supplied and type tested with the radio equipment, designed as an indispensablepart of the equipment.fixed station: equipment intended for use in a fixed location.H-field test antenna: electrically screened loop or equivalent antenna, with which the magnetic component of the fieldcan be measured.identification system: equipment consisting of a transmitter(s), receiver(s) (or a combination of the two) and anantenna(s) to identify objects by means of a transponder.integral antenna: permanent fixed antenna, which may be build-in, designed as an indispensable part of the equipment.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)10magnetic dipole moment: product of (Number of coil turns) ´ (coil area) ´ (coil current). (Air coils only)mobile station: equipment normally installed in a vehicle.portable station: equipment intended to be carried, attached or implanted.radiated measurements: measurements which involve the absolute measurement of a radiated field.telecommand: use of radio communication for the transmission of signals to initiate, modify or terminate functions ofequipment at a distance.telemetry: use of radio communication for indicating or recording data at a distance.transponder: device, that responds to an interrogation signal.3.2SymbolsFor the purposes of the present document, the following symbols apply:EElectrical field strengthEoReference electrical field strength, (see annex A)fFrequencyHMagnetic field strengthHoReference magnetic field strength, (see annex A)mMagnetic dipole momentPPowerRDistanceRoReference distance, (see annex A)tTime3.3AbbreviationsFor the purposes of the present document, the following abbreviations apply:EMCElectroMagnetic CompatibilityISMIndustrial, Scientific and MedicalRFRadio FrequencySRDShort Range DeviceVSWRVoltage Standing Wave Ratio4General4.1Presentation of equipment for testing purposesEach equipment submitted for testing shall fulfil the requirements of the present document on all frequencies over whichit is intended to operate.The applicant shall complete the appropriate application form when submitting the equipment for testing. Also, theapplicant shall declare the frequency ranges, the range of operating conditions and power requirements, as applicable, toestablish the appropriate test conditions.Additionally, technical documentation and operating manuals, sufficient to make the test, shall be supplied.A test fixture for equipment with an integral antenna may be supplied by the applicant (see subclauses 6.3). Forequipment supplied without an antenna i.e. Class 3, the applicant will supply either a tuned reduced radiating load (seesubclause 6.2.1) or an artificial antenna as defined by annex H).PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)11If an equipment is designed to operate with different radiated field strengths, measurement of each transmitter parametershall be performed, according to the present document, on samples of equipment defined in subclause 4.1.1.4.1.1Choice of model for testingThe applicant shall provide one or more samples of the equipment, as appropriate for testing.Stand alone equipment shall be offered by the applicant complete with any ancillary equipment needed for testing.If an equipment has several optional features, considered not to affect the RF parameters then the tests need only to beperformed on the equipment configured with that combination of features considered to be the most complex, asproposed by the applicant and agreed by the test laboratory.4.1.2On-site testingIn certain cases it may not be possible to provide representative samples of antennas and/or equipment due to physicalconstraints. In these cases equivalent measurements to the present document shall be made at a representativeinstallation of the equipment (on-site).4.2Mechanical and electrical design4.2.1GeneralThe equipment submitted by the applicant should be designed, constructed and manufactured in accordance with soundengineering practice and with the aim of minimizing harmful interference to other equipment and services.Transmitters and receivers may be individual or combination units.4.2.2ControlsThose controls which, if maladjusted, might increase the interfering potentialities of the equipment shall not be easilyaccessible to the user.4.2.3Transmitter shut-off facilityIf the transmitter is equipped with an automatic transmitter shut-off facility, it should be made inoperative for theduration of the test.4.2.4Receiver mute or squelchIf the receiver is equipped with a mute, squelch or battery-saving circuit, this circuit shall be made inoperative for theduration of the tests.4.2.5Marking (equipment identification)The equipment shall be marked in a visible place. This marking shall be legible and durable. Where this is not possibledue to physical constraints, the marking shall be included in the users manual.4.2.5.1Equipment identificationThe marking shall include as a minimum:-the name of the manufacturer or his trade mark;-the type designation.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)124.2.5.2Regulatory markingThe equipment shall be marked, where applicable, in accordance with CEPT/ERC Recommendation 70-03 [3]. Wherethis is not applicable the equipment shall be marked in accordance with the National Regulatory requirements.4.3Declarations by the applicantWhen submitting equipment for type testing, the applicant shall supply the necessary information required by theappropriate application form.The performance of the equipment submitted for type testing shall be representative of the performance of thecorresponding production model.4.4Auxiliary test equipmentAll necessary test signal sources and set-up information shall accompany the equipment when it is submitted for typetesting.4.5Interpretation of the measurement resultsThe interpretation of the results recorded on the appropriate test report for the measurements described in the presentdocument shall be as follows:-the measured value relating to the corresponding limit shall be used to decide whether an equipment meets therequirements of the present document;-the measurement uncertainty value for the measurement of each parameter shall be included in the test report;-the recorded value of the measurement uncertainty shall, for each measurement, be equal to, or lower than, thefigures in the table of measurement uncertainty (clause 9).5Test conditions, power sources and ambienttemperatures5.1Normal and extreme test conditionsType testing shall be made under normal test conditions, and also, where stated, under extreme test conditions.The test conditions and procedures shall be as specified in subclauses 5.2 to 5.4.5.2Test power sourceThe equipment shall be tested using the appropriate test power source as specified in subclauses 5.2.1 or 5.2.2. Whereequipment can be powered using either external or internal power sources, then the equipment shall be tested using theexternal power source as specified in subclause 5.2.1 then repeated using the internal power source as specified insubclause 5.2.2.The test power source used shall be stated in the test report.5.2.1External test power sourceDuring type tests, the power source of the equipment shall be replaced by an external test power source capable ofproducing normal and extreme test voltages as specified in subclauses 5.3.2 and 5.4.2. The internal impedance of theexternal test power source shall be low enough for its effect on the test results to be negligible. For the purpose of thePSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)13tests, the voltage of the external test power source shall be measured at the input terminals of the equipment. Theexternal test power source shall be suitably de-coupled as close to the equipment battery terminals as practicable. Forradiated measurements any external power leads should be so arranged so as not to affect the measurements.During tests the test power source voltages shall be within a tolerance of < ± 1 % relative to the voltage at the beginningof each test. The value of this tolerance can be critical for certain measurements. Using a smaller tolerance will providea better uncertainty value for these measurements.5.2.2Internal test power sourceFor radiated measurements on portable equipment with integral antenna, fully charged internal batteries should be used.The batteries used should be as supplied or recommended by the applicant. If internal batteries are used, at the end ofeach test the voltage shall be within a tolerance of < ± 5 % relative to the voltage at the beginning of each test.If appropriate, for conducted measurements or where a test fixture is used, an external power supply at the requiredvoltage may replace the supplied or recommended internal batteries. This shall be stated on the test report.5.3Normal test conditions5.3.1Normal temperature and humidityThe normal temperature and humidity conditions for tests shall be any convenient combination of temperature andhumidity within the following ranges:-temperature+15°C to +35°C;-relative humidity20 % to 75 %.When it is impracticable to carry out tests under these conditions, a note to this effect, stating the ambient temperatureand relative humidity during the tests, shall be added to the test report.5.3.2Normal test power source5.3.2.1Mains voltageThe normal test voltage for equipment to be connected to the mains shall be the nominal mains voltage. For the purposeof the present document, the nominal voltage shall be the declared voltage, or any of the declared voltages, for which theequipment was designed.The frequency of the test power source corresponding to the ac mains shall be between 49 Hz and 51 Hz.5.3.2.2Regulated lead-acid battery power sourcesWhen the radio equipment is intended for operation with the usual types of regulated lead-acid battery power source, thenormal test voltage shall be 1,1 multiplied by the nominal voltage of the battery (e.g. 6 V, 12 V etc.).5.3.2.3Other power sourcesFor operation from other power sources or types of battery (primary or secondary), the normal test voltage shall be thatdeclared by the equipment applicant and agreed by the accredited test laboratory. Such values shall be stated in the testreport.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)145.4Extreme test conditions5.4.1Extreme temperatures5.4.1.1Procedure for tests at extreme temperaturesBefore measurements are made the equipment shall have reached thermal balance in the test chamber. The equipmentshall be switched off during the temperature stabilizing period.In the case of equipment containing temperature stabilization circuits designed to operate continuously, the temperaturestabilization circuits shall be switched on for 15 minutes after thermal balance has been obtained, and the equipmentshall then meet the specified requirements.If the thermal balance is not checked by measurements, a temperature stabilizing period of at least one hour, or suchperiod as may be decided by the accredited test laboratory, shall be allowed. The sequence of measurements shall bechosen, and the humidity content in the test chamber shall be controlled so that excessive condensation does not occur.5.4.1.1.1Procedure for equipment designed for continuous operationIf the applicant states that the equipment is designed for continuous operation, the test procedure shall be as follows:-before tests at the upper extreme temperature the equipment shall be placed in the test chamber and left untilthermal balance is attained. The equipment shall then be switched on in the transmit condition for a period of ahalf hour after which the equipment shall meet the specified requirements;-for tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal balance isattained, then switched on for a period of one minute after which the equipment shall meet the specifiedrequirements.5.4.1.1.2Procedure for equipment designed for intermittent operationIf the applicant states that the equipment is designed for intermittent operation, the test procedure shall be as follows:-before tests at the upper extreme temperature the equipment shall be placed in the test chamber and left untilthermal balance is attained in the oven. The equipment shall then either:-transmit on and off according to the applicants declared duty cycle for a period of five minutes; or-if the applicant's declared on period exceeds one minute, then:-transmit in the on condition for a period not exceeding one minute, followed by a period in the off orstandby mode for four minutes; after which the equipment shall meet the specified requirements.-for tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal balance isattained, then switched to the standby or receive condition for one minute after which the equipment shall meetthe specified requirements.5.4.1.2Extreme temperature rangesFor tests at extreme temperatures, measurements shall be made in accordance with the procedures specified insubclause 5.4.1.1, at the upper and lower temperatures of one of the following ranges:Category I (General):-20°C to +55°C.Category II (Portable):-10°C to +55°C.Category III (Equipment for normal indoor use):0°C to +55°C.NOTE:The term "Equipment for normal indoor use" is taken to mean the minimum indoor temperature is equal toor greater than 5°C.PSIST EN 300 330:2000

ETSIEN 300 330 V1.2.2 (1999-05)15For special applications, the manufacturer can specify wider temperature ranges than given as a minimum above. Thisshall be ref
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