79/374/NP - ISO/IEC JTC1 SC25 WG1 Home Page
Contents
1. Fig 3 Composition of housing community Intercom System 5 Technical Requirements 5 1 Requirements of Appearance and Mechanical Structure 5 1 1 Appearance 5 1 1 1 The external dimensions of the enclosure shall conform to the requirements declared by manufacturer 5 1 1 2 The surface of non metallic enclosure shall be free of cracks faded coloring permanent stains noticeable deformation or scratches 5 1 1 3 The surface coating of metallic enclosure shall completely cover the substrate metal and be free of bubbles corrosion scratches peelings or pores 5 1 2 Mechanical Structure 5 1 2 1 Buttons and switches shall be operated freely and reliably parts and components shall be firmly assembled without any looseness 5 1 2 2 The characteristics of fork springs and the push button dialing pad shall conform to the requirements of international standards for telephone sets 5 1 2 3 The wiring terminals of the outdoor unit and the indoor unit after the installation of their connection shall not be exposed to any accessible surface 5 1 2 4 The enclosure of the outdoor unit shall have protection against physical attack 5 1 2 5 The enclosure designed for the system power supply shall contain reliable arrangements for the backup power supply 79 374 NP 5 4 3 Marking 5 1 3 1 The devices in the system shall have legible permanent markings 5 1 3 2 The markings shall contain the following items which are applic2. Amplifier AC voltmeter Artificial ear o D Central Outdoor unit panel entral Transmission Supporting panel ifici control Recei in BN Audio oscillator Artificial mouth Speaker amplifier equipment eceiver amplifier Ea q Ha Sl Indoor handheld unit manage handheld unit 0 5mX 0 5n Fig A 6 Measurement of the STMR of the Handheld Centre Manage Unit and Handheld Indoor Unit A 6 Test of Ringtone Sound Level When the ringtone is sounding using a sound meter to measure the sound level in the place 0 5m right in front of the central axis of the centre manage unit or the indoor unit with Fig A 7 Test results shall conform to the requirements set forth in 5 3 6 Il bP Floor 32 79 374 NP Fig A 7 Test of Ringtone Sound Level 33 79 374 NP Annex B Normative Inspection of Video Characteristics B 1 Inspection Methods B 1 1 The inspection for image resolution and brightness discrimination level shall be performed in accordance with Fig B 1 Adjust the distance between the video outdoor unit and the test pattern to align the borders of image shown on the monitor of the video centre manage unit or the video indoor unit in accordance with the borders specified by test pattern B 1 2 Test of the ambient illuminance adaptability shall be performed in a dark room The color temperature of the light source shall be 3100K 100K
3. 0 0 ccc ccc esee 24 Annex Alt io va et ey eL RE Deua ria e dnt 26 Annex B eo RU uu A INO SPRUNG NI ee Remind 34 79 374 NP General Requirements for Building Intercom Systems 1 Scope This standard sets forth the composition classification technical requirements testing methods inspection rules packaging transportation and storage for building intercom system and is the fundamental basis of the design manufacturing and inspection of building intercom system and equipments This standard is applicable for the audio or video intercom system used for commercial and residential buildings 2 Normative References The following referenced documents are indispensable of this document for the application For dated references only the edition cited applies For undated references the latest edition of the referenced document including any amendments applies IEC 60065 Audio video and similar electronic apparatus Safety requirements IEC 60529 Degrees of Protection Provided by Enclosures IP Code IEC 60950 1 Information technology equipment Safety Part 1 General requirements IEC 62262 2002 Degrees of Protection Provided by Enclosures for Electrical Equipment against External Mechanical Impacts IK Code IEC 62599 1 Alarm systems Part 1 Environmental test methods IEC 62599 2 Alarm systems Part 2 Electromagnetic compatibility Immunity requirements for components of fire and security alarm systems
4. of them producing and selling in China for more than 10 years Over the years of market activities in China 1 Other TC SCs are requested to indicate their interest if any in this NP to the TC SC secretary Copyright 2012 International Electrotechnical Commission IEC All rights reserved It is permitted to download this electronic file to make a copy and to print out the content for the sole purpose of preparing National Committee positions You may not copy or mirror the file or printed version of the document or any part of it for any other purpose without permission in writing from IEC FORM NP IEC Registered trademark of the International Electrotechnical Commission 2009 01 09 79 374 NP Chinese standard has gotten comprehensive acceptance by these international manufacturers and the products in accordance with Chinese standard has been widely used in global scope For instance the products from the following manufacturers have already been conformed to the requirements of Chinese Standard France Legrand U S A Honeywell German TCS SSS SIEDLE Bosch Spain Fermax Golmar Korea Samsung Kocom Commax Japan Aiphone Italy URMET Elvox etc Among them some of the brands like LEGRAND ABB HONEYWELL URMET and Bosch have their own factories in China In conclusion Chinese standard has established a good foundation to prepare an international standard Available standards on door phone developed
5. ITU T P 51 Artificial Mouth ITU T P 64 Determination of Sensitivity Frequency Characteristics of Local Telephone Systems ITU T P 79 Calculations of Loudness Ratings for Telephone Sets 3 Terms and Definitions The following terms and definitions are applicable for the purposes of this document 79 374 NP 3 1 Audio intercom system An electronic system providing addressing call intercom and electrical unlocking is used for commercial or residential building s 3 2 Video intercom system An electronic system providing addressing call intercom video observation and electrical unlocking is used for commercial or residential building s 3 3 Audio center manage unit A device installed at the manage centre which provides both way call intercom with audio or video outdoor unit and audio or video indoor unit lock control at audio or video outdoor unit meanwhile receiving managing and controlling the information from audio or video outdoor unit and audio or video indoor unit 3 4 Video center manage unit A device installed at the manage centre which provides both way call intercom with video outdoor unit and video indoor unit lock control at video outdoor unit surveillance of video outdoor unit meanwhile receiving managing and controlling the information from video outdoor unit and video indoor unit 3 5 Audio outdoor unit A device installed at the building entrance which provides addressing call intercom electr
6. line of the input terminal of any indoor unit is intended short circuit or when an indoor unit is resulted fault by the most harshness test the fundamental functions of other fault free circuits in the same system For the above tests if a fault presents the test shall last for 2 minutes and if no fault presents the test shall last for 4 hours The test results shall conform to the requirements set forth in 5 9 4 6 8 4 Temperature Rise Test Test shall be performed according to standard sets forth in 11 2 1 specified in IEC 60065 While the system is in conditions of right operation the test results shall conform to requirements set forth in Article 5 9 5 6 9 Electromagnetic Compatibility Test 6 9 1 Electrostatic Discharge Immunity Test The test shall be conducted with methods specified in IEC 62599 2 The test shall cover electrostatic discharge to the positions accessible to the operator and to the reference ground plane with 0 1m distance from the system sample The test results shall conform to the requirements set forth in 5 10a Temporary variation less than 200ms is permissible 20 79 374 NP 6 9 2 Radiated Radio frequency Electromagnetic Field Immunity Test The test shall be conducted with methods specified in IEC 62599 2 The test results shall conform to the requirements set forth in 5 10b 6 9 3 Electrical Fast Transient Burst Immunity Test The test shall be conducted with methods specified in IEC 62599 2 T
7. Replace the television testing pattern in Fig B 2 with a human face target for inspection Camera Monitor y 1 E ORENSE 4d3 Medium transmission l control equipment TV testing pattern Video outdoor unit Video indoor unit Fig B 1 Inspection of Video Characteristics B 2 Inspection of Image Resolution Use the camera on the video outdoor unit to capture an integrated television testing pattern in Fig B 2 Observe by visual inspection the maximum number of lines recognizable on the central wedge in the image on the monitor of the video centre manage unit or the video indoor unit The results shall conform to the requirements set forth in 5 6 1 B 3 Inspection of Brightness Discrimination Level Use the camera on the video outdoor unit to capture a gray level television testing pattern of the integrated television testing pattern in Fig B 2 Observe by visual inspection the maximum brightness discrimination level recognizable on the monitor of the video centre manage unit or the video indoor unit The results shall conform to the requirements set forth in 5 6 2 34 79 374 NP TVL X 100 TT RT T IEEE APPROVED RESOLUTION CHART Fig B 2 Integrated Television Testing Pattern B 4 Inspection of Ambient llluminance Adaptability Place both the video outdoor unit and the tester in an evenly illuminated environment adjust the light source to bring ambient illuminance to t
8. and third harmonic voltage U2 and Us Determine the non linear distortion of the centre manage unit and the indoor unit y using Formula A 6 2 2 y AMAU qa x 100 The test results shall conform to the requirements set forth in 5 3 3 A 4 Test of S N Ratio A 4 1 Testing Conditions The test shall be conducted with the conditions of ambient noise lt 40dBA A 4 2 Test of the S N Ratio of the Outdoor Unit Connect the system sample in accordance with Fig A 2 or Fig A 3 Regulate sound pressure Pm of the reference point of the artificial mouth to 4 7 dBPa with testing frequency of 1 kHz Fix the handle of the handheld centre manage unit or the handheld indoor unit on the head shaped rack in the LRGP position Vertically fix the hand free centre manage unit or the hand free indoor unit in its normal position of installation The lip ring of the artificial mouth shall be 10 cm from the center of the hand free centre manage unit or the hand free indoor unit In the place 10cm from the center of the outdoor unit use a standard half inch sound pressure microphone to measure the signal sound pressure and the noise sound pressure within the range of 200 Hz to 4000 Hz The difference in decibels between the signal sound pressure and the noise sound pressure is the S N ratio of the outdoor unit The test results shall conform to the requirements set forth in 5 3 4 A 4 3 Test of the S N Ratio of the Centre Manage Unit and the Indoor Unit Conn
9. shall be determined according to the sampling rules for different sample sizes Groups C and D inspection samples shall be randomly extracted from conforming batch from Group B inspection and the samples extracted shall be no less than 3 sets 7 6 Judgment Rules 7 6 1 Whether a sample is conforming shall be determined in accordance with the test items testing methods technical requirements and levels of nonconformance specified in Table 4 If one of the samples is determined to have Level nonconformance the entire batch shall be deemed as nonconforming 23 79 374 NP 7 6 2 Samples for full inspection shall be all conforming If the quantity of non conforming samples for sampling inspection is less or equal to the number to determine batch conformance the batch shall be deemed as conforming if the quantity of non conforming samples more than the number to determine batch conformance the batch shall be deemed as nonconformance Samples in appraising inspection and Groups C and D inspections shall be all conforming if one of items is nonconforming the batch shall be deemed as nonconforming 7 7 Handling of Nonconformance 7 7 1 Inspection shall be immediately discontinued if Level nonconformance has resulted in batch nonconformance in this case effective corrective actions shall be taken within a relevant scope The batch shall be resubmitted for inspection after the causes of Level nonconformance have been eliminated If
10. the range of 200 Hz to 4000 Hz will not exceed 1dB with 1000Hz as the reference point When the bandwidth is increased to 8000 Hz sound pressure fluctuation within the extended frequency range of 100 Hz to 8000 Hz shall not exceed the range of 2dB to 5dB Frequency meter e 25mm lt gt Audio oscillator Artificial mouth cl Pm 4 7dB Relative to 1Pa 4M P ip d Amplifier AC voltmeter Equalized sound source Standard half inch gt D sound pressure microphone Fig A 1 Measurement of Sound Pressure P at the Mouth Reference Point A 1 1 2 Measurement of Output Sound Pressure Po of the Outdoor Unit with the Handheld Centre Manage Unit or Handheld Indoor Unit Connected Remove the microphone in Fig A 1 while keeping the drive sound source of the artificial mouth unchanged and connect the system in accordance with Fig A 2 Fix the handle of the handheld centre manage unit or the handheld indoor unit on the head shaped rack in the LRGP position Then vertically fix the outdoor unit in its normal position of installation and place the standard half inch sound pressure microphone in front of the center of the outdoor unit the microphone shall be 10cm from the center of the enclosure surface of the outdoor unit Lastly measure output sound pressure Po of the outdoor unit within the range of 200 Hz to 4000 Hz at all frequency points at an interval of one third of the octave frequency 26 7
11. the place 10cm from the center of the outdoor unit use a standard half inch sound pressure microphone and frequency spectrum analyzer to measure fundamental voltage U and second and third harmonic voltage U and U of the output sound pressure Determine the non linear distortion of the outdoor unit using Formula A 5 2 2 Wn A a ee A 5 The test results shall conform to the requirements set forth in 5 3 3 A 3 2 Test of Non linear Distortion of the Centre Manage Unit and the Indoor Unit Connect the system sample in accordance with Fig A 4 or Fig A 5 Regulate sound pressure Pm of the reference point of the artificial mouth on the outdoor unit side to 0 dBPa The frequency of the drive sound source signals is 500 Hz and 1000 Hz with a distance of 10 cm from the center of the outdoor unit Tightly couple the earpiece of the handle of the handheld 30 79 374 NP centre manage unit or the handheld indoor unit with the artificial ear vertically fix the hand free centre manage unit or the hand free indoor unit in its normal position of installation and place the standard half inch sound pressure microphone in front of the center of the hand free centre manage unit or the hand free indoor unit The microphone shall be 10 cm from the center of the enclosure surface of the hand free centre manage unit or the hand free indoor unit Use a measuring amplifier and a frequency spectrum analyzer to measure fundamental voltage U and second
12. 12 Lb d PAC A a L 1 i EA O o AAA es LT 12 o2 It 6d IES DEE dE LEPE HEBE ARCO IES DAN OA LIE Er AA a NS E z ERE E ee E xp Ix A ER e EA SE EE EA A SSL E i AAA 100 160 250 400 630 1000 1600 2500 3400 Hz 125 200 315 500 800 1250 2000 3100 5000 Frequency Fig 4 Frequency Response of the Outdoor Unit Relative OS ES GNO A Ce GNO sensitivity AT A EY I AL 3 11 3 dB 8 pop od ox o GEBIIE V WBICbL IE Vu LE 2 I m D p ou E i1 d o Lov 17 Ae a ies r E E A A L CCA CA CONT RESET ee O ael ee bes cain F AECA 2 a fc 1 100 160 250 400 630 1000 1600 2500 3400 fis 125 200 315 500 800 1250 2000 3100 5000 Fig 5 Frequency Response of the Handheld Centre Manage Unit and the Handheld Indoor Unit 14 As E Relative CA E CA E ES O O O Se O A a ee ee GEHEN AA ELO EA MAA DER sensitivity n pz up be AE AL AS Ecke sr A dB 10 DO lI morer ooo pU Tl l 1 A i ee ee Se IEEE LS ec A Se oh poema f LILL Lxx Le Ll jo_ MO INS IS IR AO AO AO a fT et po B AA a E EE LA 2 A ee ee es ed ee ee Pees A EE Ee LE d l1 E od Ss ee 2i Se a EEE A TE A 100 160 250 400 630 1000 1600 2500 3400 125 200 315 500 800 1250 2000 31 00 5000 Fig 6 Frequency Response of the Hand free Centre Manage Unit And Hand free Indoor Unit 12 79 374 NP 5 3 3 Non linear Distortion When the excitation sound pressure is 0 dBPa the non linear distortion of the rec
13. 2 6 4 Test of Acoustic Transmission Characteristics See annex A 6 5 Inspection of Video Characteristics See annex B 6 6 Test of Power Supply 6 6 1 Test of Power Supply Voltage Adaptability 6 6 1 1 Testing Devices and Requirements Test sample with electricity power supply Obtain an AC voltage regulator place it between the electricity power supply and the test sample and connect it to both Its power capacity shall at least be 100 larger than the rated power of the test sample and be able to produce AC voltage that meets required harshness level The device used for indicating AC voltage shall have an accuracy of 0 5 Test sample with DC power supply by using an adjustable DC regulated voltage supply its power capacity shall at least be 100 larger than the rated power of the test sample and be able to produce DC voltage that meets required harshness level The output ripple voltage while working status shall be less than 2 10000 of the output DC voltage The device used for indicating DC voltage shall have an accuracy of 5 17 79 374 NP The test shall be performed with the test sample at its rated load or maximum load and under normal working conditions Wiring methods and cautions shall be provided in related standards The related standards shall stipulate that during the test the test sample shall have no misoperation or fault and specify the permissible limits of electrical performance and functions when power volt
14. 3 Determine the overall sensitivity frequency characteristics of the outdoor unit using Formula A 1 Use 1 kHz as the reference point to record the sound pressure fluctuations of P relative to Pm Within the range of 500 Hz tO 3400 Hz the results shall conform to the requirements set forth in 5 3 2 A 2 2 Test of the Frequency Response of the Centre Manage Unit and the Indoor Unit Perform measurement shall be performed in accordance with A 1 2 2 and A 1 2 3 Determine the overall sensitivity frequency characteristics of the centre manage unit and the indoor unit using Formula A 3 Use 1 kHz as the reference point to record the sound pressure fluctuations of Pe relative to Pm Within the range of 500 Hz t0 3400 Hz the results shall conform to the requirements set forth in 5 3 2 A 3 Test of Non linear Distortion A 3 1 Test of Non linear Distortion of the Outdoor Unit Connect the system sample in accordance with Fig A 2 or Fig A 3 Regulate sound pressure Pm of the reference point of the artificial mouth to OdBPa The frequency of the drive sound source signals is 500Hz and 1kHz Fix the handle of the handheld mange unit or handheld indoor unit on the head shaped rack in the LRGP position Vertically fix the hand free centre manage unit or the hand free indoor unit in its normal position of installation The lip ring of the artificial mouth shall be 10cm from the center of the hand free centre manage unit or the hand free indoor unit In
15. 30 in IEC 60529 b Level Il The outdoor unit the system power supply and other outdoor installed parts shall conform to the provisions of IP53 in IEC 60529 After dust and water pouring tests they shall be able to work normally and conform to the requirements of dielectric strength and insulation resistance The indoor unit the system power supply and other indoor installed parts shall conform to the provisions of IP30 in IEC 60529 C Level Ill The outdoor unit the system power supply and other outdoor installed parts shall conform to the provisions of IP65 in IEC 60529 After dust and water pouring tests they shall be able to work 10 79 374 NP normally and conform to the requirements of dielectric strength and insulation resistance The indoor unit the system power supply and other indoor installed parts shall conform to the provisions of IP30 in IEC 60529 5 2 Fundamental Functional Requirements 5 2 1 Addressing Call Function With operation the centre mange unit shall be able to call the right outdoor unit or indoor unit the outdoor unit shall be able to call the right centre manage unit and indoor unit the indoor unit shall be able to call the right centre manage unit all shall be able to response with a ring back tone 5 2 2 Talking Function With call answered the system shall enable two way talking the voices shall be clear and free of high pitched whistling sound 5 2 3 Electronic Control Unlocking Function
16. 79 374 NP NEW WORK ITEM PROPOSAL Chinese NC Secretariat 2012 03 79 France Date of circulation Closing date for voting 2012 03 23 2012 06 22 A proposal for a new work item within the scope of an existing technical committee or subcommittee shall be submitted to the Central Office The proposal will be distributed to the P members of the technical committee or subcommittee for voting on the introduction of it into the work programme and to the O members for information The proposer may be a National Committee of the IEC the secretariat itself another technical committee or subcommittee an organization in liaison the Standardization Management Board or one of the advisory committees or the General Secretary Guidelines for proposing and justifying a new work item are given in ISO IEC Directives Part 1 Annex C see extract overleaf This form is not to be used for amendments or revisions to existing publications The proposal to be completed by the proposer Title of proposal General Requirements for Building Intercom Systems px Standard L Technical Specification Scope as defined in ISO IEC Directives Part 2 6 2 1 This international standard specifies the composition classification technical requirements testing methods inspection rules packaging transport amp storage of building intercom system It is the fundamental basis of the design manufacture and inspection of building intercom systems and equipments This s
17. 9 374 NP Frequency meter Handheld indoor unit handheld manage unit Outdoor unit panel 5 Central Supporting panel Voltage measuring HZ Transmission nm Measuring device or frequency Speaker control Receiver amplifier Spectrum analyzer Artificial mouth Audio oscillator amplifier equipment amplifier ll d par SNAHE HSH I Exp 0 5mX0 5n gt Q Equalized sound source Ses FE WS Up 10cmn gt lt Fig A 2 Measurement of the Acoustic Transmission Characteristics of the Outdoor Unit with the Handheld Centre Manage Unit or the Handheld Indoor Unit Connected l Artificial A 1 1 3 Measurement of Output Sound Pressure Po of the Outdoor Unit with the Hand free Centre Manage Unit or the Hand free Indoor Unit Connected Remove the microphone in Fig A 1 while keeping the drive sound source of the artificial mouth unchanged and connect the system in accordance with Fig A 3 Vertically fix the hand free indoor unit in its normal position of installation the lip ring of the artificial mouth shall be 10cm from the center of the hand free indoor unit Then vertically fix the outdoor unit in its normal position of installation and place the standard half inch sound pressure microphone in front of the center of the outdoor unit the microphone shall be 10 cm from the center of the enclosure surface of the outdoor unit Lastly mea
18. Application By application building intercom systems are classified into intercom system for villas mainly for detached houses and villas for single home are shown in Fig 1 intercom system for general buildings mainly for general multi storey flats or offices and apartment mansions are shown in Fig 2 and intercom system for housing community mainly for villas buildings or villas with buildings together are shown in Fig 3 Central transmission System power Outdoor unit control equipment Indoor unit System power supply supply Fig 1 Composition of villas Intercom System Indoor unit Central transmission control Indoor unit equipment Indoor unit Central transmission control Indoor unit equipment Outdoor unit Central transmission control 79 374 NP Fig 2 Composition of general buildings Intercom System Villa intercom system care d Central transmission control equipment Center manage unit transmission control 1 Building intercom system l equipment nrc D io e e EDI Central transmission Center manage control unit 2 Lia HE DRE LAT equipment Arean Villa intercom System Central transmission control equipment Center manage unit l Building intercom system transmission control equipment
19. Recharging and Under voltage Protection 5 7 3 4 The main power supply shall be able to automatically recharge the battery of the backup power supply and conform to the technical requirements of the recharging of the battery 5 7 3 2 When the battery voltage of the backup power supply drops to the rated threshold of termination there shall be protections to avoid over discharge 5 8 Environmental Adaptability Requirements The working environments of the system are classified into three levels by the degree of harshness After undergoing all climatic and mechanical environment tests the system shall be free of any electrical fault structural deformation or poor contact During and after each test the system s fundamental basic functions shall all operate normally 5 9 Safety Requirements 5 9 1 Dielectric Strength The dielectric strength between the system s power plug or the input terminals of the power supply and the metallic exposed parts of the enclosure shall be able to withstand a 45 Hz to 65 Hz AC voltage specified in Table 1 Without any electrical breakdown and electrical arc in one minute test Table 1 Dielectric Strength Rated Voltage Uis V Testing Voltage DC or Sinusoidal RMS AC Peak Value or Composed Voltage kV 14 79 374 NP 0 60 0 85 0 5 61 125 86 176 1 126 250 177 354 1 5 251 500 355 707 2 2500 2107 2Uis integral KV number 5 9 2 Insulation Resistance The i
20. With operation the centre manage unit and the indoor unit shall be able to control the outdoor unit to perform electrical unlocking 5 2 4 Nighttime Operability The outdoor unit shall provide proper illumination or visible prompts to facilitate the visitor s operations at night 5 3 Acoustic Transmission Characteristics 5 3 1 Overall Loudness Rating OLR OLR of the outdoor unit 18 dB 5 dB OLR of the handheld centre manage unit and the handheld indoor unit 13 dB 5 dB OLR of the hand free centre manage unit and the hand free indoor unit 21 dB 5 dB 5 3 2 Frequency Response The typical curve dotted line in Fig 4 and its tolerance solid line in Fig 4 of the frequency response from 500 Hz to 3400 Hz for the outdoor unit are shown in Fig 4 The typical curve dotted line in Fig 5 and its tolerance solid line in Fig 5 of the frequency response from 500 Hz to 3400 Hz for the handheld centre manage unit and the handheld indoor unit are shown in Fig 5 The typical curve dotted line in Fig 6 and its tolerance solid line in Fig 6 of the frequency response from 500 Hz to 3400 Hz for the hand free centre manage unit and the hand free indoor unit are shown in Fig 6 11 79 374 NP Relative sensitivity dB px wb Es p ow AE AA AA AIA SSSA SSS STL M AE ER EA EA a A a qp cb E 7 20 IRIS CAM EA MIE CLICS IEEE PI CU ERES LIE D E15 8 L1 1 17 1 1 1 1 1 E 00 1 es L LII 1o Dd ou ES
21. able to the device The name of the manufacturer or company Product plate number or model number Serial number or batch number Class of protection function Date of manufacture Power ratings including regular operating voltage current and frequency Rated current of the circuit protection If it is impractical to mark the above information on the product such information shall be provided in the User s Manual 5 1 3 3 All handheld control devices shall bear legible markings of their function characters or numerical digits shall be marked near by the connection terminals cables shall be numbered colored or otherwise marked 5 1 3 4 The markings shall be durable scrub resistant and indelible 5 1 4 Mechanical Robustness The enclosures of the parts that constitute the system shall be able to withstand a 0 5 J impact on any normally accessible surface After the impact test there shall be no permanent deformation or damage 5 1 5 Enclosure Protection Capability There are three levels of enclosure protection capability a Levell The outdoor unit the system power supply and other outdoor installed parts shall conform to the provisions of IP33 in IEC 60529 After a water pouring test they shall be able to work normally and conform to the requirements of dielectric strength and insulation resistance The indoor unit the system power supply and other indoor installed parts shall conform to the provisions of IP
22. age vary to reach the prescribed values of its harshness level 6 6 1 2 Testing Procedures Expose the test sample to normal atmospheric conditions connect an adjustable power supply with a voltage indicator specified in related standards to the power supply input terminals of the sample power on and keep the sample working at its rated power and perform tests for electrical performance and functions Adjust the adjustable power supply according to the prescribed harshness levels to reach the lower limit and the upper limit and after the test sample reaches its thermal stabilization perform tests for electrical performance and functions The system sample shall be tested separately under normal minimum and maximum voltage conditions Sufficient time shall be allowed to achieve temperature stability The basic functions of the test sample shall be checked and its power consumption shall be measured Test results shall conform to the requirements set forth in 5 7 1 6 6 2 Test of Power Supply Switching Connect and disconnect the AC power supply to the system sample for 10 times and then check its fundamental functions The test results shall conform to the requirements set forth in 5 7 2 6 6 3 Test of Automatic Charging and Under voltage Protection 6 6 3 1 Measure the charging voltage and current when the main power supply charges the backup power supply The test results shall conform to the requirements set forth in 5 7 3 1 6 6 3 2 D
23. apability Fundamental 5 52 6 3 I y y functions Overall 6 5 3 1 A 1 I y y loudness rating Table 4 continued Quality Consistency Inspection Technical Testing Level of Appraising No Test Item Group Group Group Group Requirements Methods Nonconformance Inspection A B C D Frequenc 7 i pd 5 3 2 A 2 I y y response Non linear 8 MU 5 3 3 A 3 I y y distortion 22 79 374 NP 9 SIN ratio 5 3 4 AA I y y Sidetone 10 5 3 5 A 5 I y y masking rating Ringtone sound 11 9 5 3 6 A 6 I Y Y level 12 Video functions 5 4 B 4 I y Y Video 13 5 6 B I y characteristics Power supply 14 voltage 5 7 1 6 6 1 I Y Y adaptability Power suppl 15 PPY 572 6 6 2 I Y Y switching Automatic charging amp 16 ang 5 7 3 6 6 3 I y Y under voltage protection Environmental 17 5 8 6 7 I y adaptability 18 Safety 5 9 6 8 Y Electromagnetic 19 5 10 6 9 I y compatibility 20 Stability 5 11 6 10 III y 7 5 Sampling Rules 7 5 1 The size of samples submitted for appraising inspection shall be no more than 50 sets and the number of samples to be tested shall be no less than 3 sets The samples shall be randomly extracted 7 5 2 Quality Consistency Inspection Group A inspection all samples shall be inspected Group B inspection samples shall be randomly extracted from conforming batch from Group A inspection The number of samples
24. astest growing countries in the global development of the video intercom market The sales amount of 2011 is about 1 5 billion USD in Chinese market which is about 50 of the global market share 2 Necessity It is very necessary to establish an international standard since the intercom system has played an important role to protect the life and or property of residents and has become an important part to consist alarming and electronics security protection system This international standard should be applicable in global scope to cover the different ranges of intercom system in Asia Europe America and the other areas This international standard shall apply to the audio or video intercom systems Beside the necessary terminologies and definitions this standard shall include audio and or video functions and performance requirements safety requirements EMC environments adapting and stability requirements as well as relevant testing methods 3 Feasibility China issued the Building Intercom Systems standard in 1994 and revised the publication in 2005 The intercom system according to Chinese standard is applicable for residential quarter high rise amp low rise buildings villa and hybrid architecture That is the intercom system in accordance with Chinese standard is also able to satisfy the requirements for the global market as well Most of the famous VDP video intercom system manufacturers have been sharing Chinese market with some
25. by CLC can be taken into consideration as possible reference for first CD 2013 12 for IS TS 2014 12 Estimated number of meetings 6 Frequency of meetings 2 per year Date and place of first meeting 2012 10 Beijing China Proposed working methods XX E mail IX Collaboration tools Relevant documents to be considered N A Relationship of project to activities of other international bodies N A Liaison organizations Need for coordination within ISO or IEC N A N A Preparatory work Ensure that all copyright issues are identified Check one of the two following boxes XX A draft is attached for comment O An outline is attached Recipients of this document are invited to submit with their comments notification of any relevant patent rights of which they are aware and to provide supporting documentation We nominate a project leader as follows in accordance with ISO IEC Directives Part 1 2 3 4 name address fax and e mail Name HE Chengming Mr Address 65 Sunban South Rd Jimei North Industrial Zone Xiamen City China Post code 361021 Tel 86 0 592 6157698 Fax 86 0 592 6299688 Mobile 86 0 139 0603 5325 Email arthur leelen com qiuwen234 163 com Concerns known patented items see ISO IEC Directives Part 2 Name and or signature of the proposer Yes If yes provide full information as an annex X no GUO Chenguang Secretary Chinese NC of IEC Fax 86 10 82260660 E mail guocg sac gov cn Comments an
26. d recommendations from the TC SC officers 1 Work allocation O Project team CL New working group Q Existing working group no 2 Draft suitable for direct submission as O CD O CDV DTS 3 General quality of the draft conformity to ISO IEC Directives Part 2 O Little redrafting needed O Substantial redrafting needed O no draft outline only 4 Relationship with other activities In IEC In other organizations 5 Proposed horizontal standard O Other TC SCs are requested to indicate their interest if any in this NP to the TC SC secretary Remarks from the TC SC officers The TC 79 chairman is in favour of this NWIP Approval criteria e Approval of the work item by a simple majority of the P members voting At least 4 P members in the case of a committee with 16 or fewer P members or at least 5 P members in the case of committees with more than 17 P members have nominated or confirmed the name of an expert and approved the new work item proposal 79 374 NP Elements to be clarified when proposing a new work item Title Indicate the subject matter of the proposed new standard or technical specification Indicate whether it is intended to prepare a standardor a technical specification Scope Give a clear indication of the coverage of the proposed new work item and if necessary for clarity exclusions Indicate whether the subject proposed relates to one or more of the fields of safety EMC the environment or qualit
27. ect the system sample in accordance with Fig A 4 or Fig A 5 Regulate sound pressure Pm of the reference point of the artificial mouth on the outdoor unit side to 4 7 dBPa with testing frequency of 1000 Hz and a distance of 10 cm from the center of the outdoor unit Tightly couple the earpiece of the handle of the handheld centre manage unit and the handheld indoor unit with the artificial ear Vertically fix the hand free centre manage unit or the hand free indoor unit in its normal position of installation and place the standard half inch sound pressure microphone in front of the center of the hand free centre manage unit or the hand free indoor unit with the microphone being 10 cm from the center of the enclosure surface of the hand free centre 31 79 374 NP manage unit or the hand free indoor unit Measure the signal sound pressure and the noise sound pressure within the range of 200 Hz to 4000 Hz The difference in decibels between the signal sound pressure and the noise sound pressure is the S N ratio of the centre manage unit and the indoor unit The test results shall conform to the requirements set forth in 5 3 4 A 5 Test of the Sidetone Masking Rating STMR of the Handheld Centre Manage Unit and the Handheld Indoor Unit Perform measurement in accordance with Fig A 6 and use the specific testing methods specified in Section 7 of ITU T P 79 The test results shall conform to the requirements set forth in 5 3 5
28. eiving terminal of the system shall not exceed 7 5 3 4 S N Ratio With the handheld centre manage unit and the handheld indoor unit the channel S N ratio at the receiving terminal shall not be lower than 30 dB With the hand free centre manage unit and the handheld indoor unit the channel S N ratio at the receiving terminal shall not be lower than 25 dB With the outdoor unit the channel S N ratio at the receiving terminal shall not be lower than 25 dB 5 3 5 Sidetone Masking Rating STMR Sidetone masking rating value of the handle of handheld centre manage unit and handheld indoor unit shall not be lower than 5 dB 5 3 6 Ringtone Sound Level In any operation conditions the ringtone sound level shall be within range of 70 dB A and 110 dB A 5 4 Video Function Requirements When the video outdoor unit calls the video indoor unit the video indoor unit shall display the video images captured by the video outdoor unit The video images shall be of a quality that makes the visitor s facial features recognizable 5 5 Image Recording amp Replaying Function The system should be equipped with the functions of recording the visitor s video images into the storage and replaying the visitor s video images from the storage by indoor unit 5 6 Video Characteristics 5 6 1 Image Resolution The resolution of black and white video images horizontal center shall not be lower than 250 TVL The resolution of color video images h
29. equency l L gt al Spectrum analyzer 0 5mX0 5m l Equalized sound source E Pi laor m a gt 10cm Fig A 4 Measurement of the Acoustic Transmission Characteristics of the Calling Channel of the Handheld Centre Manage Unit and the Handheld Indoor Unit A 1 2 3 Measurement of Output Sound Pressure Pe of the Hand free Centre Manage Unit and the Hand free Indoor Unit Remove the microphone in Fig A 1 while keeping the drive sound source of the artificial mouth unchanged and connect the system in accordance with Fig A 5 Vertically fix the outdoor unit in its normal position of installation the lip ring of the artificial mouth shall be 10 cm from the center of the outdoor unit Then vertically fix the hand free centre manage unit or the hand free indoor unit in its normal position of installation and place the standard half inch sound pressure microphone in front of the center of the indoor unit the microphone shall be 10 cm from the center of the enclosure surface of 28 79 374 NP the indoor unit Lastly measure output sound pressure P of the hand free indoor unit within the range of 200 Hz to 4000 Hz at all frequency points at an interval of one third of the octave frequency Frequency meter Handle of indoor unit Hand free manage unit hand free indoor unit Supporting panel Supporting pane Voltage measuring n ea
30. est Test shall be performed according to standard sets forth in Article 10 3 specified in IEC 60065 the test results shall conform to the requirements set forth in Article 5 9 1 and Article 5 9 2 19 79 374 NP 6 8 2 Leakage Current Test The results of the leakage current test shall conform to the requirements set forth in 5 9 3 Testing Methods Place the test sample on an insulated table and apply power at 1 1 times the maximum rated voltage until the temperature stabilizes The reading of the ampere meter could be determined with the measure change over switch and power switch randomly combined The internal resistance of the ampere meter is 2 kQ including the external resistance in series with the ampere meter 6 8 3 Fault Protection Test Determine fault conditions possibly resulted with damage according to the system structure and principles Apply the following fault conditions in the descending of the most convenience a Power supply polarity is reversed b The output terminal is short circuited c Wiring terminals are wrongly connected each other or in contact with the power supply terminal d The secondary winding of the transformer is short circuited the primary winding is short circuited with the secondary winding if there is an iron core or a shield each winding is short circuited with the iron core and the shield e For multi user systems with more than 28 indoor units under control when the transmission
31. est of the OLR of the Centre Manage Unit and the Indoor Unit A 1 2 1 Measurement of Sound Pressure Pm of the Mouth Reference Point The measuring methods and requirements for sound pressure Pm of the reference point of the artificial mouth on the outdoor unit side are the same as those in A 1 1 1 A 1 2 2 Measurement of Sound Pressure Pe of the Earpiece of the Handle of the Handheld Centre Manage Unit and the Handheld Indoor Unit Remove the microphone in Fig A 1 while keeping the drive sound source of the artificial mouth unchanged and connect the system in accordance with Fig A 4 Vertically fix the outdoor unit in its normal position of installation the lip ring of the artificial mouth shall be 10cm from the center of the outdoor unit Then fix the handle of handheld indoor unit on the head shaped rack in the LRGP position and tightly couple the earpiece and the artificial ear Lastly measure output sound pressure P of the earpiece within the range of 200Hz to 4000Hz at all frequency points at an interval of one third of the octave frequency Frequency meter Handle of indoor unit Handheld indoor unit handheld manage unit Supporting panel Central qL gt transmission Artificial trol Receiver Artificial mouth Speaker contro ear Audio oscillator 7 D amplifier equipment amplifier i Measuring Voltage measuring amplifier device or fr
32. fast transient bursts as specified in IEC 62599 2 d Interference of surge live wire with neutral wire value 1 KV and live wire or neutral wire with grounding wire of power line value 2 KV signal wire with grounding wire value 1 KV as specified in IEC 62599 2 e Interference of 6096 reduction of rated voltage and instantly drop voltage to zero from rated voltage as specified in IEC 62599 2 During the test the system shall be able to work normally without any misoperation in logic control or damage to any component 5 11 Stability Requirements The functions of the system shall be checked at least three times per day during the system is 15 79 374 NP operating for seven consecutive days in normal climate conditions During the tests the system shall be able to work normally without misoperation 6 Testing Methods for Building Intercom Systems 6 1 General Testing Conditions 6 1 1 Ambient Conditions for Tests Temperature 15 C 35 C Relative humidity 25 75 Atmospheric pressure 86 kPa 106 kPa Unless otherwise stipulated the ambient noise of the testing venue for the characteristics of acoustic transmission shall not exceed 50 dB A 6 1 2 Electrical Connection During the test system samples shall be installed with the methods recommended by the manufacturer and all components required for normal operation shall be connected to form a basic unit for system testing Unless otherwise specified the system sha
33. he minimum and the maximum value use the camera on the video outdoor unit to capture a facial image of the tester Observe and evaluate by visual inspection the quality of the image on the monitor of the video centre manage unit or the video indoor unit At least the facial features of the tester shall be recognizable The test results shall conform to the requirements set forth in 5 4 and 5 6 3 35
34. he test shall cover impulse interference resulting from the power line and interconnected line The test results shall conform to the requirements set forth in 5 10c 6 9 4 Surge Immunity Test The test shall be conducted with methods specified in IEC 62599 2 The test shall cover surges resulting from the power line and interconnected line The test results shall conform to the requirements set forth in 5 10d 6 9 5 Voltage Dips and Short Interruptions Immunity Test The test shall be conducted with methods specified in IEC 62599 2 The test results shall conform to the requirements set forth in 5 106 6 10 Stability Test The sample passed initial tests shall be kept continuously working for 7 days under normal ambient conditions its fundamental functions shall be tested at least 3 times per day The test results shall conform to the requirements set forth in 5 11 7 Inspection Rules 7 1 Inspection Classification The inspection of building intercom systems is classified into the following types a Appraising Inspection In any of the following circumstances an appraising inspection shall be performed 1 Trial production for new design product or appraisal of product prototype 2 Production transfer or factory site change 3 Resumption from obsolete production 4 Essential modification with structure material or process which may affect the performance of product 5 Significant differences between the results of fact
35. ical unlocking and other functions 3 6 Video outdoor unit A device installed at the building entrance which provides addressing call intercom electrical unlocking video capturing and other functions 3 7 Audio indoor unit A device installed inside the user s room which provides intercom lock control and other functions 3 8 Video indoor unit A device installed inside the user s room which provides intercom surveillance lock control and other functions 79 374 NP 3 9 System power unit A device supplies power to the system 3 10 Artificial mouth An analogue device which conforms to the requirements set forth in Article 5 of ITU T P 51 its sound characteristics are similar to the directivity and radiation pattern of the average human mouth 3 11 Artificial ear A device being used for calibrating the receiver it contains an acoustic coupler and a calibrated microphone used for measuring sound pressure Its overall acoustic impedance within a given frequency band is similar to that of the average human ear its characteristics conform to the requirements set forth in Article 7 of ITU T P 64 3 12 Overall loudness rating OLR A measure of the loudness in the entire channel from the reference point of the mouth at the transmitting terminal to the reference point of the ear at the receiving terminal expressed in dB ITU T P 79 Definition 3 13 Overall sensitivity The gain of the excitation sound pre
36. ischarge the backup power supply until the average voltage of individual batteries reaches the rated termination value and then measure the current output of the backup power supply The current output shall not exceed 0 5 mA 6 7 Test of Environmental Adaptability 6 7 1 High Temperature Test Methods specified in IEC 62599 1 shall be followed The system sample shall remain in a working state throughout the test The fundamental functions shall be tested during the last half hour of the test After the test the system sample shall be allowed to recover for at least one hour All fundamental functions of the system sample shall be tested 6 7 2 Low Temperature Test Methods specified in IEC 62599 1shall be followed The system sample shall remain in a working state throughout the test The fundamental functions shall be tested during the last half 18 79 374 NP hour of the test After the test the system sample shall be allowed to recover for at least one hour All fundamental functions of the system sample shall be tested 6 7 3 Constant Humid Heat Test Methods specified in IEC 62599 1 shall be followed The system shall be powered on at the nominal voltage of power supply and remain in a working state for 48 hours after that the system shall be powered off and remain for another 48 hours Dielectric strength and insulation resistance shall be measured immediately after the test and the results shall conform to the requirements set f
37. ll be powered by a main power supply AC and equipped with backup batteries of a suitable capacity A basic unit typically consists of an outdoor unit two indoor units a set of system power supply an electronically controlled lock and a transmission line with length of three meters exclusive of wireless intercom system connecting the outdoor unit with the indoor units Moreover a basic unit shall include all other necessary components specified by the manufacturer such as an isolator a layers decoder and other relay transmission control equipment Sample configuration shall meet product function requirements When testing the characteristics of acoustic transmission the handle of the handheld centre manage unit and the handheld indoor unit shall be fixed on the head shaped rack in the loudness rating guard ring position LRGP The LRGP shall be determined in accordance with the provisions of ITU T P 64 The hand free centre manage unit the hand free outdoor unit and the hand free indoor unit shall be fixed in the centre place of the 0 5 m 0 5 m seamless board and the device for test should be fixed in the centre of the installation rack The center of the intersection angle between the artificial mouth and the artificial ear shall be 10 cm right in front of the center of the panel of the enclosure of the outdoor unit The testing environments shall be in anechoic chamber and the tested units shall be independently sound proofed in case of i
38. nsulation resistance between the system s power plug or the input terminals of the power supply and the enclosure or the exposed metallic parts of the enclosure shall not be lower than 100 MQ in normal ambient conditions or 10 MQ in humid heat conditions 5 9 3 Leakage Current The system s leakage current shall not exceed 5 mA AC peak value 5 9 4 Protection under Fault Conditions Under fault conditions which can easily cause damage no part of the system shall burn and the internal electrical circuit shall be protected to avoid permanent damage For multi user systems with more than 28 indoor units under system control the fault of the partial indoor units shall not affect the normal operations of the other fault free circuits in the system 5 9 5 Temperature Rise Under normal working conditions the temperature of the enclosure of any part of the system shall not exceed 65 C and the temperature of any heat dissipation component inside machine after continuous operating for four hours shall not exceed the specified value of the component 5 10 Electromagnetic Compatibility Requirements The system shall be able to withstand the harmful effects of the following electromagnetic interference a Interference of electrostatic discharge as specified in IEC 62599 2 gap discharge value 8 KV contact discharge value 6 KV b Interference of radio frequency electromagnetic radiation as specified in IEC 62599 2 c Interference of electrical
39. nterfering with each other 6 2 Inspection of Appearance and Structure 6 2 1 Inspection of Appearance and Mechanical Structure Use a caliper and other measuring tools to check the product s exterior dimensions according to 16 79 374 NP which the manufacturer declares visually inspect the product s appearance and manually check the control mechanism to make sure that they conform to the requirements set forth in 5 1 1 and 5 12 6 2 2 Test of Scrub resistance The scrub resistance test shall conform to the requirements set forth in 5 1 3 Testing Method Scrub the markings with a water dipped cotton ball with strength 50N and then with a gasoline soaked cloth for 15 seconds After the scrubbing the markings shall not be illegible 6 2 3 Test of Mechanical Robustness Mechanical Robustness shall be tested in accordance with the methods specified in IEC 62262 The test results shall conform to the requirements set forth in 5 1 4 6 2 4 Test of Enclosure Protection Capability The degree of enclosure protection capability shall be tested in accordance with the methods specified in IEC 60529 The test results shall conform to the requirements set forth in 5 1 5 6 3 Inspection of Fundamental Functions Individual parts shall be connected to form a complete system in accordance with the methods specified in 6 1 2 All fundamental functions of the system shall be tested to make sure that they conform to the requirements set forth in 5
40. orizontal center shall not be lower than 200 TVL 5 6 2 Brightness Discrimination Level The brightness discrimination of black and white video images shall not be lower than Level 8 The brightness discrimination of colorized video images shall not be lower than Level 8 5 6 3 Ambient llluminance Adaptability The working ambient illuminance of the black and white video outdoor unit shall be within the range of 0 1 lux to 4500 lux and the system s video function shall operate normally 13 79 374 NP The working ambient illuminance of the color video outdoor unit shall be within the range of 0 1 lux to 3500 lux and the system s video function shall operate normally 5 7 Power Supply Requirements 5 7 1 Power Supply Voltage Adaptability AC Rating 10 DC Rating 10 12 V power supply preferred Within the specified range of power supply voltage the system shall be able to operate normally with no adjustment required The AC and DC static power consumption of all parts of the system and the capacity of the backup power supply shall be indicated in the User s Manual 5 7 2 Power Supply Switching When the main power supply fails due to outage the system shall be able to automatically Switch to the backup power supply When the main power supply is restored the system shall be able to switch back to the main power supply During the switching the system shall be able to work normally without any misoperation 5 7 3 Automatic
41. orth in 5 9 1 and 5 9 2 After the test the system sample shall be allowed to recover for at least one hour then fundamental functions of the system sample shall be tested Table 3 Level I Level Il Level Ill Description Rating Test Duration Rating Test Duration Rating Test Duration Temperature Test Temperature Test The indoor unit and system power supply and other parts installed indoors 55 C 2 C The indoor unit and system power supply and other parts installed indoors 10 C 3 C 8h Constant k 7 40 Cx2 C 40 C 2 C 40 C 2 C Humid Heat 96h 96h Test RH 93 2 RH 93 2 RH 93 2 es 10 Hz 55 Hz 10 Hz 55 Hz 10 Hz 55 Hz Sinusoidal accelerated speed 20 accelerated 20 accelerated 20 Vibration 10 m s verd speed 10 m s b deri speed 10 m s ns cycles direction cycles direction cycles direction Test 1 OCT m 1 OCT m 1 OCT m direction X Y Z direction X Y Z direction X Y Z 6 7 4 Sinusoidal Vibration Test Methods specified in IEC 62599 1 shall be followed The system sample shall remain in a working state throughout the test The fundamental functions shall be tested immediately after the test The exterior and interior of the system sample shall be visually inspected for mechanical damage See Table 3 for the test parameter settings The test results shall conform to the requirements set forth in 5 8 6 8 Safety Test 6 8 1 Dielectric Strength and Insulation Resistance T
42. ory delivery inspection and the results of previous appraisal b Quality Consistency Inspection Group A Inspection batch by batch Full inspection at the time of product delivery Group B Inspection batch by batch Sampling inspection at the time of product delivery Group C Inspection cyclic On a semiannual basis test samples extracted randomly from 21 79 374 NP conforming batches to be delivered Group D Inspection cyclic On an annual basis test samples extracted randomly from conforming batches to be delivered 7 2 Levels of Nonconformance Level I Nonconforming safety items Level Il Nonconforming appearance and mechanical structure items Level IIl Nonconforming items other than Levels and Il 7 3 Test Items and Sequence All the test items testing methods and technical requirements of building intercom systems and the classification of nonconformance shall be in accordance with Table 4 7 4 Grouping Rules The group of products applies for inspection shall come from the same production batch Table 4 Quality Consistency Inspection 7 n Technical Testing Level of Appraising O est Item G G G G Requirements Methods Nonconformance Inspection ii TEMP CORR RUP A B Cc D Appearance 1 and mechanical 5 1 1 5 1 2 6 2 1 I y y structure 2 Markings 5 1 3 6 2 2 I Y Y Mechanical 3 5 1 4 6 2 3 I y y Robustness Enclosure 4 protection 5 1 5 6 2 4 I Y Y C
43. s likely to be the subject of regulations or to require the harmonization of existing regulations this should be indicated If a series of new work items is proposed the purpose and justification of which is common a common proposal may be drafted including all elements to be clarified and enumerating the titles and scopes of each individual item Relevant documents List any known relevant documents such as standards and regulations regardless of their source When the proposer considers that an existing well established document may be acceptable as a standard with or without amendments indicate this with appropriate justification and attach a copy to the proposal Cooperation and liaison List relevant organizations or bodies with which cooperation and liaison should exist Preparatory work Indicate the name of the project leader nominated by the proposer 79 374 NP General Requirements for Building Intercom Systems Contents 1 SCOPE 4 eene A A pa seman f e 5 2 Normative References 0 ccc ccc cence ee eee e eae 5 3 Terms and Definitions s occ css eee pega e rera x pas 5 4 System Composition and System Classification ooooooomoooo 8 5 Technical Requirements 2 0 cece ec cette e 9 6 Testing Methods for Building Intercom Systems 00 02 eee ee eee 16 Inspection Rules oorr tr ER Vas EE veo e iz 21 8 Packaging Transportation and Storage
44. ssure at the reference point of the ear at the reception terminal relative to the reference point of the mouth at the transmitting terminal expressed in dB it is a function of frequency 3 14 Non linear distortion Distortion of signals at the reception terminal of the system as a result of system non linearity expressed as a percentage of the harmonic components of the sound signals at the receiving terminal relative to the fundamental component 3 15 Channel S N The sound pressure ratio between signal and background noise at the receiving terminal under excitation of the nominal sound pressure at the transmitting terminal expressed in dB 3 16 Sidetone masking rating STMR A measure of sidetone loudness after factoring in the masking effects of the human head on sidetone expressed in dB ITU T P 79 Definition 79 374 NP 3 17 Loudness rating guard ring position LRGP The fixed position for the handle of the indoor unit is used to measure the rating of system loudness ITU T P 64 Definition 4 System Composition and System Classification 4 1 System Composition A building intercom system basically consists of centre manage unit outdoor unit indoor unit system power supply central transmission control equipment etc 42 System Classification 4 2 1 Classification by Function By function building intercom systems are classified into audio intercom system and video intercom system 4 2 2 Classification by
45. sure output sound pressure Po of the outdoor unit within the range of 200 Hz to 4000 Hz at all frequency points at an interval of one third of the octave frequency Frequency meter IHand free manage unithand free indoor unit Outdoor unit panel l Supporting panel Supporting panel Voltage measuring P easuring device or frequency Speaker Receiver I amplifier Spectrum analyzer D amplifier amplifier lArtificial E DH A control equipment Equalized sound source x Ez NS iu fs Central transmission 10cm gt lt 0 5mX0 5m 0 5mX0 5m 10cm HZ Artificial mouth Audio oscillator oo NA lo n jo ac AA Fig A 3 Measurement of the Acoustic Transmission Characteristics of the Outdoor Unit with the Hand free Centre Manage Unit or the Hand free Indoor Unit Connected A 1 1 4 Calculations for the OLR of the Outdoor Unit Determine overall sensitivity frequency characteristic S of the outdoor unit using Formula A 1 Sio 20 Ig P Pm dB relative to IPa Pa sss A 1 Determine the OLR of the outdoor unit using Formula A 2 27 79 374 NP 17 et 10 dra Wi OLR 101g gt 10 where Wa is the weighting coefficient of OLR see Table A 1 for the W of different frequencies and m is the slope parameter and equals 0 175 The test results shall conform to the requirements set forth in 5 3 1 A 1 2 T
46. suring device or frequency Receiver amplifier Spectrum analyzer ifici l Speaker Audio oscillator Artificial mouth D amplifier amplifier d Artificial ear A L sw ral l O J Central Transmission control equipment l Equalized sound source E EE A 4 10cm gt lt 0 5mX0 5m 0 5mX0 5m gt lt 10cm Fig A 5 Measurement of the Acoustic Transmission Characteristics of the Hand free Centre Manage Unit and the Hand free Indoor Unit A 1 2 4 Calculations for OLR of the Centre Manage Unit and the Indoor Unit Determine overall sensitivity frequency characteristic So of the centre manage unit and the indoor unit using Formula A 3 Sor 20 Ig Pe Pm dB relative to 1Pa Pa esses A 3 Determine the OLR of the centre manage unit and the indoor unit using Formula A 4 17 Ns 10 10 Sor oi Lg OLR m lg 2 10 where La is the acoustic leakage coefficient of the earpiece see Table A 1 for the Le of different frequencies m is the slope coefficient and equals 0 175 The test results shall conform to the requirements set forth in 5 3 1 Table A 1 w and L of Different Frequencies Frequency Band Central Frequency Hz Overall Weighting Earpiece Sound Acoustic E e Poen ate cme 8 o5 o9 o 79 374 NP 15 2500 78 6 7 4 A 2 Test of Frequency Response A 2 1 Test of the Frequency Response of the Outdoor Unit Perform measurement in accordance with A 1 1 2 and A 1 1
47. tandard applies to the audio video intercom systems used in commercial and residential buildings Purpose and justification including the market relevance whether it is a proposed horizontal standard Guide 108 and relationship to Safety Guide 104 EMC Guide 107 Environmental aspects Guide 109 and Quality assurance Guide 102 attach a separate page as annex if necessary 1 Marketing relevance The global demand for intercom system products is around 25 million in 2011 with its market value about 3 billion USD According to the compound increase rate of 10 per year it will reach 4 4 billion USD in 2015 In the next decade video intercom system will be the indispensable household infrastructure The global applications of intercom system in different areas reveal certain diversity such as Asia China India Korea Japan and Indonesia video intercom system for residential quarter is the majority sharing more than 70 of the global market and maintaining an increase rate of 25 to 30 per year Latin America Brazil Argentina Chile and Mexico video intercom system for single building is the majority The increase rate is about 20 per year Europe U K France Germany Spain Turkey and Netherland video intercom system for single home is the majority The increase rate is about 15 per year Middle East and North America The market demand for high end intercom system is fast increasing China has become one of the f
48. the delivered products are involved users shall be immediately notified so that the products can be returned for repairs alternatively repairs can be conducted on the user s premises 7 7 2 Nonconforming products from the batch which has been determined to be conforming shall be replaced or repaired to be conforming by the manufacturer 7 7 3 For batch nonconformance from sampling inspection inspection shall be discontinued to the products representing that batch and the causes shall be analyzed The batch shall be resubmitted for inspection after the causes of nonconformance have been eliminated 7 8 Resubmission for Inspection of Batches For the nonconforming of batch inspection after repair adjustment analysis of root cause elimination of the nonconforming causes and full re inspection with conformance result the specified quantity of samples shall be randomly extracted again for inspection If the batch is still nonconforming the batch should be rejected and the production should be stopped until the root causes have been analyzed measures have been taken to result new appraising inspection passed then the normal production and quality consistency inspection may be resumed 8 Packaging Transportation and Storage 8 1 Packaging 8 1 1 The outdoor unit the indoor unit and the system power supply of building intercom systems and the other accessories shall be separately packaged in carton boxes and the product part no quali
49. ty certificate warranty certificate wiring diagram or user s manual shall be contained inside the box 8 1 2 Measures shall be taken for vibration proof water proof and damp proof for the external box of building intercom system kits or the packaging of multiple assembly for transportation 8 2 Transportation and Storage 8 2 1 The packaging of the products shall be adequate to ensure safety in transport by truck train ship or airplane The packaging for transport shall have measures for vibration proof 24 79 374 NP water proof and damp proof 8 2 2 Packaged products shall be stored in a well ventilated room or warehouse with an ambient temperature of 10 C to 40 C and relative humidity of no more than 80 and free of corrosive gas 25 79 374 NP Annex A Normative Test of Acoustic Transmission Characteristics A 1 Test of Overall Loudness Rating OLR A 1 1 Test of the OLR of the Outdoor Unit A 1 1 1 Measurement of Sound Pressure P at Mouth Reference Point Measurement shall be performed in accordance with Fig A 1 Install a standard half inch sound pressure microphone in a place 25mm right in front of the lip ring of the artificial mouth in a 90 incidence direction At the 1000 Hz frequency point regulate sound pressure Pm at the mouth reference point to 4 7dBPa then measure sound pressure Pm at all frequency points at an interval of one third of the octave frequency so that sound pressure fluctuation within
50. y assurance Purpose and justification Give details based on a critical study of the following elements wherever practicable a b The specific aims and reason for the standardization activity with particular emphasis on the aspects of standardization to be covered the problems it is expected to solve or the difficulties it is intended to overcome The main interests that might benefit from or be affected by the activity such as industry consumers trade governments distributors Feasibility of the activity Are there factors that could hinder the successful establishment or general application of the standard Timeliness of the standard to be produced Is the technology reasonably stabilized If not how much time is likely to be available before advances in technology may render the proposed standard outdated Is the proposed standard required as a basis for the future development of the technology in question Urgency of the activity considering the needs of the market industry consumers trade governments etc as well as other fields or organizations Indicate target date and when a series of standards is proposed suggest priorities The benefits to be gained by the implementation of the proposed standard alternatively the loss or disadvantage s if no standard is established within a reasonable time Data such as product volume of value of trade should be included and quantified If the standardization activity is or i
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