1、BRITISH STANDARDBS EN 50131-2-4:2008Alarm systems Intrusion and hold-up systems Part 2-4: Requirements for combined passive infrared and microwave detectorsICS 13.310 BS EN 50131-2-4:2008Incorporating corrigendum May 2014EN 50131-2-4:2008/IS1:2014 (E) 4 Text of IS1 to EN 50131-2-4:2008 Clause: Annex
2、 A and Figure A.1 Question: Would it be allowed for test purposes (for test houses and manufacturers) to use the NeoDym magnet listed below instead of the AlNiCo version described in Annex A and Figure A.1 for reproducible tests ? Interpretation: Yes, because this will allow stable and reproducible
3、test results, which is not guaranteed while using the AlNiCo magnet due to the nature of the magnet material. Furthermore, the test magnet described below allows a high-level degree of backward compatibility for already tested products, while it gives the stability required. Therefore, when the NeoD
4、ym magnet is used for test purposes (for test houses and manufacturers), the text below may be used in place of Annex A. Validity: This interpretation remains valid until an amendment or updated standard dealing with this issue is published by CENELEC. BS EN 50131-2-4:2008ISBN 978 0 580 83558 2Amend
5、ments/corrigenda issued since publicationDate Comments31 May 2014 Implementation of CENELEC Interpretation sheet February 2014 in National Annex NAThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 The British Standards Institut
6、ion 2014. Published by BSI Standards Limited 2014National forewordThis British Standard is the UK implementation of EN 50131-2-4:2008. It supersedes DD CLC/TS 50131-2-4:2004 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee GW/1, Electronic security syst
7、ems to Subcommittee GW/1/1, Alarm components.A list of organizations represented on this subcommittee can be obtained on request to its secretary.The publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with
8、a British Standard cannot confer immunity from legal obligations.EN 50131-2-4:2008/IS1:2014 (E) 4 Text of IS1 to EN 50131-2-4:2008 Clause: Annex A and Figure A.1 Question: Would it be allowed for test purposes (for test houses and manufacturers) to use the NeoDym magnet listed below instead of the A
9、lNiCo version described in Annex A and Figure A.1 for reproducible tests ? Interpretation: Yes, because this will allow stable and reproducible test results, which is not guaranteed while using the AlNiCo magnet due to the nature of the magnet material. Furthermore, the test magnet described below a
10、llows a high-level degree of backward compatibility for already tested products, while it gives the stability required. Therefore, when the NeoDym magnet is used for test purposes (for test houses and manufacturers), the text below may be used in place of Annex A. Validity: This interpretation remai
11、ns valid until an amendment or updated standard dealing with this issue is published by CENELEC. BS EN 50131-2-4:2008National Annex NA (Informative)EN 50131-2-4:2008/IS1:2014 (E) 5 Annex A (normative) Dimensions it is not required to operate when the I b) the manufacturers diagram of the detector an
12、d its claimed detection boundary showing top andside elevations at 2,0 m mounting height or at a height specified by the manufacturer,superimposed upon a scaled 2m squared grid. The size of the grid shallbe directly related to thesize of the claimed detection boundary;c) the recommended mounting hei
13、ght, and the effect of changes toit on the claimed detectionboundary;d) the effect ofadjustable controls on the detectors performance or on the claimed detectionboundary including at least the minimum and maximum settings;e) anydisallowed field adjustable control settings or combinations of these;f)
14、 any specific settings needed to meet the requirements of this European Standard at the claimed grade;g) where alignment adjustments are provided, these shall be labelled as to their function;h) a warning to the user not to obscure partially or completely the detectors field of view;i) the manufactu
15、rers quoted nominal operating voltage, and the maximum and quiescent currentconsumption at that voltage;j) any special requirements needed for detecting a significant reduction in range, where provided.BS EN 50131-2-4:2008EN 50131-2-4:2008EN 50131-2-4:2008 - 14 -6 TestingThe tests are intended to be
16、 primarily concerned with verifying the correct operation of the detector tothe specification provided by the manufacturer. All the test parameters specified shall carrya generaltolerance of 10 % unless otherwise stated. A list of tests appears as a general testmatrixinAnnex B.6.1General test condit
17、ions6.1.1Standard conditions for testing The general atmospheric conditions in the measurement and tests laboratory shall be those specified in EN 60068-1, 5.3.1, unless stated otherwise.Temperature 15 C to 35 CRelative humidity25 % RH to 75 % RH Air pressure 86 kPa to 106 kPa 6.1.2General detection
18、 testing environment and procedures Manufacturers documented instructions regarding mounting and operation shall be read and appliedto all tests. 6.1.3 Testing environment The detection tests require anenclosed, unobstructed and draught-free area that enablestesting ofthe manufacturers claimed cover
19、age pattern. The test area shall be large enough soas not tosignificantly affect the microwave coverage pattern due to reflections.The test area walls and floor shall have a recommended emissivityof atleast 80 % between 8 m and 14 m wavelength, at least directly behind the SWT.The temperature of the
20、 background surface immediately behind the SWT shallbe in the range 15 Cto 25 C, and shall be horizontally uniformover that area to 2 C. Over the whole background area itshallbe measured at ten points spread evenly throughout the coverage pattern. The averagebackground temperature is the linear aver
21、age of the ten points.Annex C provides example diagrams for the range of walk tests for one format of detection pattern.Many others are possible.6.1.4Standard walk test target The SWT shallhave the physical dimensions of 1,60 m to 1,85 minheight, shallweigh 70 kg 10 kgand shallwear close-fitting clo
22、thing having a recommended emissivity of at least 80 %between 8 mand 14 m wavelength. No metallic objects shall be worn or carried by the SWT or incorrectmicrowave reflection will result.6.1.4.1Standard walk test target temperature Temperatures shall be measured at the following five points on the f
23、ront of the body of the SWT:1. Head2. Chest3. Back of hand 4. Knee 5. FeetTemperatures shall be measured using a non-contact thermometer or equivalent equipment.The temperature differential at each body point is measured, then weighted and averaged as detailedin D.1.There shall be a means of calibra
24、tion and control of the desired velocity at which the SWT is requiredto move. BS EN 50131-2-4:2008EN 50131-2-4:2008- 15 -EN50131-2-4:2008 NOTE The use of a simulator/robot in place of the SWT is permitted, provided that it meets the specification of the SWT withregard to temperature and microwave re
25、flectivity. It is known as the simulated target. In case of conflict, a human walk test shallbe the primary reference. 6.1.4.2Standard walk test target temperature differentialThe walk tests shallbe performed either with an average temperature differential Dtr(as calculated inD.1) of 3,5 C 20 %, or
26、ifthe temperature differential is larger than 3,5 C +20 % (4,2C), it may beadjusted to achieve an equivalent temperature differential Dte within this range by one of the meansspecified in D.2.If Dtris less than 3,5 C 20 % (2,8 C), no valid test is possible.If Dtris between 2,8 C and 4,2 C, no adjust
27、ment is required.6.1.5 Testing procedures The detector shall be mounted at a height of 2,0 m unless otherwise specified by the manufacturer.The orientation shall be as specified by the manufacturer with unobstructed view of the walk test to be performed. The detector shall be connected to the nomina
28、l supply voltage, and connected toequipment with a means of monitoring intrusion signals or messages. The detector shall be allowed tostabilise for 180 s. If multiple sensitivitymodes such as pulse counting are available, any non-compliant modes shall be identified by the manufacturer. All compliant
29、 modes shall be tested.6.2Basic detection testThe purpose of the basic detection test is to verify that a detector is still operational after a test or testshas/have been carried out. The basic detection test verifies only the qualitative performance of a detector. The basic detection test is perfor
30、med using the BDT(s).6.2.1Basic detection targets (BDT) The manufacturer shallprovide, for testing purposes only, methods for placing either technologypermanently in a state where the other technology may cause an intrusion signal or message.The passive infrared BDT consists of a heat sourcewith hea
31、t emission equivalent to that ofa humanhand, which can be moved across the field of view of the detector. An informative description is givenin Annex E. The temperature of the source shall be between 3,5 C and 10,0 C above thebackground.The microwave BDT shallbe a metal plate having equivalent micro
32、wave reflectivity to that of thehuman hand, which can be moved across the field of view of the detector.BDTs may be used separately or together. A close-in walk test may be carried out as an alternative to using the BDT.6.2.2PIR basic detection test Activate the microwave technology; the unit shall
33、not generate an intrusion signal or message.A stimulus that is similar to that produced by the SWT is applied to the detector, using the PIR BDT.Move the PIR BDTperpendicularly across the centre line of the detection field at a distance of notmore than 1 m, and at a height where the manufacturer cla
34、ims detection will occur.Move the PIR BDT a distance of 1 m at a velocity of 0,5 ms-1to 1,0 ms-1. The detector shall produce an intrusion signal ormessage when exposed to an alarm stimulus both before and after being subjected to any test that may adverselyaffect its performance.6.2.3Microwave basic
35、 detection test Activate the passive infrared technology; the unit shall not generate an intrusion signal or message. Astimulus that is similar to that produced by the SWTisappliedtothe detectorusing the microwaveBDT. Move the microwave BDT along the centre line of the detection field from adistance
36、 of 2 m to adistance of 1 m from the detector, at a height where the manufacturer claims detection will occur.The microwave BDTis to be moved a distance of 1 m at a velocityof 0,5 ms-1 to 1,0 ms-1. The detectorshallproduce anintrusion signal ormessage when exposed to the stimulus both before and aft
37、erbeing subjected to any test that may adversely affect its performance.BS EN 50131-2-4:2008EN 50131-2-4:2008EN 50131-2-4:2008 - 16 -6.3 Walk testing6.3.1General walk test methodWalk testing is accomplished by the controlled movement of a SWT across the field of view of the detector. The grade depen
38、dent velocitiesand attitudes to be used by the SWT are specified inTable 3. The tolerance of these velocities shallbe better than 10 %. The SWT begins and ends awalk with feet together. Annex F is an informative description of two systems that maybe used tocontrol and monitor the desired velocity.6.
39、3.2Verification of detection performanceThe general test conditions of 6.1.1, 6.1.2 and 6.1.3 shall apply to all tests in this series.Detection performance shall be tested against themanufacturers documented claims. Example walktest diagrams are shown in Annex C.Any variable controls shall be set to
40、 the values recommended by the manufacturer to achieve theclaimed performance.If the dimensions of the detection pattern exceed the available test space, itmay be tested in sectionsrather than as a whole.The SWT or a suitable simulated target, with its temperature differencewith the background adjus
41、tedaccording to Annex D, shallbe used. Grade dependent velocities and attitudes are specifiedinTable 3.6.3.3Detection across and within the detection boundary.The tests assess detection of intruders moving within and across the boundariesof the detection area.The diagrams in Annex C show an example
42、of the detection boundary, superimposed whereappropriate on a scaled 2 m squared grid. A variety ofboundary formats are possible and can betested.6.3.3.1Verify detection acrossthe boundaryFigure C.1 shows an example of a manufacturers claimed detection boundary.Place test points at 2 mintervals arou
43、nd the boundary of the detection pattern, starting from thedetector, and finishing where the boundary crosses the detector axis. Repeat for the opposite side ofthe detection pattern. If the gap between the final point on each sideis greater than 2 m, place a testpoint where the boundary crosses the
44、detector axis. For Grade 1 detectors it is only necessary to testalternate test points.Each test point is connected to the detector by a radial line. At each test point, two test directions intothe detection coverage pattern are available at +45 and 45 to the radial line. Both directions shallbe tes
45、ted beginning at a distance of 1,5 m from the test point, and finish 1,5 mafter it.A walk test is a walkin one direction through a test point. Before commencing and after completingeach walk test the SWTshall stand still for at least 20 s.A walk test that generates an intrusion signal ormessage is a
46、 passed walk test. Alternativelyif the firstwalk test attempt does not generate an intrusion signal ormessage then four further attempts shallbecarried out. All of these further attempts shall generate an intrusion signal or message to constitute apassed walk test. Pass/Fail criteria: There shall be
47、 a passed walk test in both directions for every test point.6.3.3.2Verify detection within the boundaryFigure C.2 shows an example of a manufacturers claimed detection boundary superimposed upon ascaled 2 m squared grid.Starting at the detector, place the first test point at 4 m along the detector a
48、xis. Using the 2 m squaredgrid, place further test points at every alternate grid intersection, on both sides of the detector axis. Notest point shall be less than 1 m from, or lie outside, the claimed boundary.Each test pointis connected to the detector by a radialline. At each test point, two test
49、 directions areavailable, at +45 and 45 to the radial line. Both directions shall be tested beginning at a distanceof 1,5 m from the test point, and finish 1,5 m after it.BS EN 50131-2-4:2008EN 50131-2-4:2008- 17 -EN50131-2-4:2008 A walk test is a walkin one direction through a test point. Before commencing and after completingeach walk test the SWTshall stand still for at least 20 s.A walk test that genera
