1、3404583 0060659 222 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60801-2 March 1993 UDC 621.3.011-5 Supersedes HD 481.2 S1 : 1987 Descriptors: Industrial-process measurement and control, electromagnetic compatibility, electrostatic interference, test protocol with respect to electrostatic in
2、terference, severity levels with respect to electrostatic interference English version Electromagnetic compatibility for industrial-process measurement and control equipment Part 2 : Electrostatic discharge requirements (IEC 801-2 : 1991) Compatibilit lectromagntique pour les matriels de mesure et d
3、e commande dans les processus industriels Partie 2 : Prescriptions relatives aux dcharges lectrostatiques (IEC 801-2 : 1991) Elektromagnetische Vertrglichkeit von Me VCP: Vertical Coupling Plane. 4.9 holding time: Interval of time within which the decrease of the test voltage due to leakage, prior t
4、o the discharge, is not greater than 10 %. 4.10 static electricity discharge; ESD: A transfer of electrostatic charge between bodies of different electrostatic potential, in proximity or through direct contact IEV 161 -01 -221. COPYRIGHT European Committee for Electrotechnical StandardizationLicense
5、d by Information Handling Services9 3qOY583 00bObb3 753 Page 5 EN 60801-2 : 1993 4.11 immunity (to a disturbance): The ability of a device, equipment or system to perform without degradation in the presence of an electromag- netic disturbance IEV 161 -01 -201. 4.12 contact discharge method: A method
6、 of testing, in which the elec- trode of the test generator is held in contact with the EUT, and the discharge actuated by the discharge switch within the generator. 4.13 air discharge method: A method of testing, in which the charged electrode of the test generator is approached to the EUT, and the
7、 dis- charge actuated by a spark to the EUT. 4.14 direct application: Application of the test directly to the EUT. 4.15 indirect application: Application of the test to a coupling plane in the vicinity of the EUT, and simulation of personnel discharge to objects which are adjacent to the EUT. 5 Seve
8、rity levels The severity levels shown in table 1 are recommended for the ESD test. All lower levels must be satisfied. Details concerning the various parameters which may influence the voltage level to which the human body may be charged are given in clause A.2 of annex A. Annex A.4 also contains ex
9、amples of the application of the severity levels related to environmental (installation) classes. Contact discharge is the preferred test method. Air discharges shall be used where contact discharge cannot be applied. Voltages for each test method are given in tables 1.a and l.b. The voltages shown
10、are different for each method due to the differing methods of test. It is not intended to imply that the test severity is equivalent between test methods. Further information is given in clauses A.3, A.4 and A.5 of annex A. Table 1.a - Severity levels Table 1.b - Severity levels Test vol tage Air di
11、scharge “xW is an open level. The level is subject to negotiations and has to be specified in the dedicated equipment specification. If higher voltages than those shown are specified, special test equipment may be needed. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by I
12、nformation Handling Services3404583 00bObb4 bT Page 6 EN 60801-2 : 1993 6 Test generator (ESD) The test generator consists, in itsmain parts, of: - charging resistor Rch; - energy-storage capacitor Cs; - distributed capacitance cd; - discharge resistor Rd; - voltage indicator; - discharge switch; -
13、interchangeable tips of the disch rge electrod (see figure 4); - discharge return cable; - power supply unit. A simplified diagram of tional details are not of 6.1 and 6.2. the ESD generator is given in figure 1. Construc- given. The generator shall meet the requirements 6.1 Characteristics and perf
14、ormance of the ESO generator - - - - energy storage capacitance (Cs + cd): 150 pF 110 8; discharge resistance (Rd): 330 R 210 8; charging resistance (Rch): between 50 MR and 100 MQ; output voltage (see note 1): up to 8 kV (nominal) for contact discharge; up to 15 kV (nominal) for air discharge; - to
15、lerance of the output voltage indication: 15 &; - polarity of the output voltage: positive and negative; - holding time: at least 5 s; - discharge, mode of operation (see note 2): single discharge (time between successive discharges at least 1 s); - waveshape of the discharge current: see 6.2. NOTES
16、 1 Open circuit voltage measured at the energy storage capacitor. 2 The generator should be able to generate at a repetition rate of at least 20 discharges per second for exploratory purposes only. The generator shall be provided with means of preventing unintended radiated or conducted emissions, o
17、f either pulse or continuous type, so as not to disturb the EUT or auxiliary test equipment by parasitic effects. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Servicesm 3404583 00bObb5 526 = level Page 7 EN 60801-2 : 1993 I ndi - First peak cat ed
18、 current of voltage discharge f10 % The energy storage capacitor, the discharge resistor, and the discharge switch shall be placed as close as possible to the discharge electrode. The dimensions of the discharge tips are given in figure 4. For the air discharge test method the same generator is used
19、 and the discharge switch has to be closed. The tip of the generator has to be the round IEC tip. Current (230 %I at 30 ns A The discharge return cable of the test generator shall be in general 2 m long, and constructed to allow the generator to meet the waveform specifi- cation. It shall be suffici
20、ently insulated to prevent the flow of the discharge current to personnel or conducting surfaces other than via its termination, during the ESO test. Current (f30 %I at 60 ns A In cases where a 2 m (e.9. for tall EUTs), a ance with the waveform 1 2 3 4 6.2 Verification of the 2 7,s 4 15 6 22,s 8 30
21、ength of the discharge return cable is insufficient length not exceeding 3 m may be used, but compli- specification shall be verified. 4 8 12 characteristics of the ESO generator 2 4 6 In order to compare the test results obtained from different test genera- tors, the characteristics shown in table
22、2 shall be verified using the discharge return cable to be used in the testing. Table 2 - Waveform parameters I I Rise time f with discharge sui tch ns I A I kv I 017 to 1 0,7 to 1 0,7 to 1 097 to 1 I The waveform of the output current of the ESO generator for the verification procedure shall confor
23、m to figure 3. The values of the parameters of the discharge current shall be verified with 1 o00 MHz bandwidth measuring instrumentation. A lower bandwidth implies limitations in the measurement of rise time and amplitude of the first current peak. For verification, the tip of the discharge electro
24、de shall be contacted directly to the current-sensing transducer, and the generator operated in the contact discharge mode. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Services3404583 00bObbb 4b2 W Page 8 EN 60801-2 : 1993 The constructional arra
25、ngement of the current-sensing transducer for verifying the ESD generator characteristics is given in figure 2. Further details of a possible form of the current-sensing transducer are given in annex B. Other arrangements that imply the use of a laboratory Faraday cage having dimensions different fr
26、om those in figure 2 are allowed; separation of the Faraday cage from the target plane is also allowed, but in both cases the distance between the sensor and the grounding terminal point of the ESD generator shall be respected (1 m), as well as the layout of the discharge return cable. The ESD gener
27、ator shall be recalibrated at defined time periods in accordance with a recognized quality assurance system. 7 Test set-up The test set-up consists of the test generator, EUT and auxiliary instru- mentation necessary to perform direct and indirect application of dis- charges to the EUT as applicable
28、, in the following manner: a) contact discharge to the conductive surfaces and to coupling planes; b) air discharge at insulating surfaces. Two different types of tests can be distinguished: - type (conformance) tests performed in laboratories; - post installation tests performed on equipment in its
29、 final installed conditions. The preferred test method is that of type tests performed in laboratories and the only accepted method of demonstrating conformance with this standard. The EUT shall be arranged as closely as possible to arrangement in final installed conditions. 7.1 Test set-up for test
30、s performed in laboratories The following requirements apply to tests performed in laboratories under environmental reference conditions outlines in 8.1. A ground reference plane shall be provided on the floor of the laboratory. It shall be a metallic sheet (copper or aluminium) of 0,25 mm minimum t
31、hickness; other metallic materials may be used but they shall have at least 0,65 mm thickness. The minimum size of the reference plane is 1 m2, the exact size depending on the dimensions of the EUT. It shall project beyond the EUT or coupling plane by at least ,5 m on all sides, and shall be connect
32、ed to the protective grounding system. Local safety regulations shall always be met. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Servicesm 3404583 00bbbi 3T9 m Page 9 EN 60801-2 : 1993 The EUT shall be arranged and connected according to its func
33、tional requirements. A distance of 1 m minimum shall be provided between the equipment under test and the walls of the laboratory and any other metal I ic s t ructu re. The EUT shall be connected to the grounding system in accordance with its installation specifications. No additional grounding conn
34、ections are a I lowed. The positioning of the power and signal cables shall be representative of in s ta I I at ion practice. The discharge return cable of the ESD generator shall be connected to the ground reference plane. The total length of this cable is in general 2 m. In cases where this length
35、 exceeds the length necessary to apply the discharges to the selected points, the excess length shall, where possible, be placed non-inductively off the ground reference plane and shall not come closer than 0,2 m to other conductive parts in the test Set-up. The connection of the earth cables to the
36、 ground reference plane and all bondings shall be of low impedance, for example by using clamping devices for high frequency applications. Where coupling planes are specified, for example to allow indirect appli- cation of the discharge, they shall be constructed from the same material type and thic
37、kness as that of the ground reference plane, and shall be connected to the GRP via a cable with a 470 kQ resistor located at each end. These resistors shall be capable of withstanding the discharge voltage and shall be insulated to avoid short circuits to the GRP when the cable lies on the GRP. Addi
38、tional specifications for the different types of equipment are given below. 7.1 -1 Tabie-top equipment The test Set-up shall consist of a wooden table, 0,8 m high, standing on the ground reference plane. A horizontal coupling plane (HCP), 1,6 m x 0,8 m, shall be placed on the table. The EUT and cabl
39、es shall be isolated from the coupling plane by an insulating support 0,5 mm thick. If the EUT is too large to be located 0,l m minimum from all sides of the HCP, an additional, identical HCP shall be used, placed 0,3 m from the first, with the short sides adjacent. The table has to be enlarged or t
40、wo tables may be used. The HCPs shall not be bonded together, other than via the resistive cable to the GRP. Any mounting feet associated with the EUT shall remain in place. An example of the test Set-up for table-top equipment is given in figure 5. COPYRIGHT European Committee for Electrotechnical
41、StandardizationLicensed by Information Handling ServicesPage 10 EN 60801-2 : 1993 m 3q04583 00bObb 235 m 7.1 .2 Floor-standing equipment The EUT and cables shall be isolated from the ground reference plane by an insulating support about 0,l m thick. An example of the test Set-up for floor-standing e
42、quipment is given in figure 6. Any mounting feet associated with the EUT shall remain in place. 7.2 Test set-up for post-installation tests These tests are optional and not mandatory for certification tests; they shall be applied only when agreed between manufacturer and customer. It has to be consi
43、dered that other Co-located equipment may be unacceptably affected. The equipment or system shall be tested in its final installed conditions. In order to facilitate a connection for the discharge return cable, a ground reference plane shall be placed on the floor of the installation close to the EU
44、T at about 0,l m distance. This plane should be of copper or aluminium not less than 0,25 mm thick. Other metallic materials may be used provid- ing the minimum thickness is 0,65 mm. The plane should be approximately 0,3 m wide, and 2 m in length where the installation allows. This ground reference
45、plane should be connected to the protective earth- ing system. Where this is not possible, it should be connected to the earthing terminal of the EUT, if available. The discharge return cable of the ESD generator shall be connected to the reference plane at a point close to the EUT. Where the EUT is
46、 installed on a metal table, the table shall be connected to the reference plane via a cable with a 470 kR resistor located at each end, to prevent a build-up of charge. An example of the Set-up for post-installation tests is given in Figure 7. 8 Test procedure 8.1 Laboratory reference conditions In
47、 order to minimize the impact of environmental parameters on test results, the tests shall be carried out in climatic and electromagnetic reference conditions as specified in 8.1.1 and 8.1.2. 8.1 .I Climatic conditions In the case of air discharge testing the climatic conditions shall be within the
48、following ranges: - ambient temperature: 15 OC to 35 OC; - relative humidity: 30 % to 60 %; - atmospheric pressure: 68 kPa (680 mbar) to 106 kPa (1 060 mbar). NOTE - Any other values are specified in the product specification. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed
49、 by Information Handling Services3404583 00bObb 171 Page 11 EN 60801-2 : 1993 8.1 .2 Electromagnetic conditions The electromagnetic environment of the laboratory shall not influence the test results. 8.2 EUT exercising Test programs and software shall be chosen so as to exercise all normal modes of operation of the EUT. The use of special exercising software is encouraged, but permitted only where it can be shown that the EUT is being comprehensively exercised. For conformance testing, the EUT shall be continually operated in its most sensitive mode (program cycle) which
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