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1、BRITISH STANDARD BS EN 61307:1997 IEC 1307:1994 Industrial microwave heating installations Test methods for the determination of power output The European Standard EN 61307:1996 has the status of a British Standard ICS 25.180.10 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:
2、00 2006, Uncontrolled Copy, (c) BSI BS EN 61307:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 July 1997 BSI 09-1999 ISBN 0 580 27790 9 National foreword T
3、his British Standard is the English language version of EN 61307:1996. It is identical with IEC 1307:1994. It supersedes BS 7509:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PEL/27, Electroheating, which has the responsibility to: aid enquirer
4、s to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations repre
5、sented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that Annex ZA lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or Eu
6、ropean publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract
7、. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6 and
8、 a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:
9、29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61307:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 613073 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun she
10、ffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61307 September 1996 ICS 25.180.10 Descriptors: Electroheating installation, industrial heating, dielectric heating, microwave heating, output power, test method English
11、version Industrial microwave heating installations Test methods for the determination of power output (IEC 1307:1994) Installations industrielles de chauffage hyperfrquence Mthodes dessais pour la dtermination de la puissance de sortie (CEI 1307:1994) Industrielle Mikrowellen-Erwrmungs- anlagen Meve
12、rfahren fr die Bestimmung der Ausgangsleistung (IEC 1307:1994) This European Standard was approved by CENELEC on 1996-07-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standar
13、d without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other
14、language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, G
15、reece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretari
16、at: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC member Ref. No. EN 61307:1996 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61307:1996 BSI 09-1999 2 Foreword The text of the International Standard IEC 1307:1
17、994, prepared by IEC TC 27, Industrial electroheating equipment, was submitted to the formal vote and was approved by CENELEC as EN 61307 on 1996-07-02 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Ann
18、ex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 1307:1994 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 Section 1. General 1.1Scope and object3 1.2Normative references3 1.3Definit
19、ions4 Section 2. Tests 2.1Power output test loads4 2.1.1Calorimeter load4 2.1.2Dummy load4 2.1.3Open-dish load4 Section 3. Description of tests 3.1Methods of test and measurements4 3.1.1Calorimeter load4 3.1.2Dummy loads5 3.1.3Open-dish load5 Annex ZA (normative) Normative references to internationa
20、l publications with their corresponding European publications6 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-06-01 latest date by which the national standards conflicting with the EN have to be withdra
21、wn(dow) 1997-06-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61307:1996 BSI 09-19993 Section 1. General 1.1 Scope and object This International Standard is applicable to industrial microwave heating installations used for the purpos
22、e of thermal applications of loads containing water or moisture such as heating, drying of partially conductive or non-conductive materials, such as wood, textiles, paper, foodstuffs, etc., in both normal and protective atmospheres, using for example, inert gas or vacuum. For other loads (for exampl
23、e, plastics) the test methods are under consideration. This standard relates to microwave power generators in the frequency range 300 MHz to 6 GHz comprising an assembly of electrical and mechanical devices intended for the transfer of microwave power to the material to be treated. Equipment operati
24、ng at the lower end of the microwave frequency spectrum (i.e. between 300 MHz and about 600 MHz) may use vacuum tubes or alternative microwave emitters. If the power output measurement systems specified in this standard cannot be applied for particular applications within this frequency range, then
25、the alternative systems would be those of IEC 1308. The main purpose of this standard is to give test methods for industrial microwave energy generators. Due to the large variety of microwave heating applications, any output power figures obtained as a result of these tests should not be taken as re
26、presenting the amount of power that can be dissipated into a particular product within a particular microwave heating installation, but in certain instances, the output figures could be used as an indication of performance. The amount of power required to achieve an aim for enthalpy change in a prod
27、uct within a fixed period of time will be dependent, for example, on the products composition, the evolution of its loss factor with temperature, as well as the construction of the applicator system, the way the generator is matched to the product within the applicator and the amount of coupling bet
28、ween generators when more than one is used. Two types of microwave industrial heating equipment exist: Type A Equipment with microwave power generators (for example, power supplies plus magnetrons or klystrons), independent of or separable from the applicators, to which they provide the microwave po
29、wer, for example via a waveguide or a coaxial feeder. This is mostly the case when high-power magnetrons or klystrons are Used. Usually, a circulator is mounted between the magnetrons or klystrons and the applicator to protect them from reflected power. Type B Equipment with microwave power generato
30、rs directly coupled to the applicator, i.e. inserting a circulator or a water load between the generator or generators and the applicator itself, becomes structurally impossible. This standard relates to equipment normally operating under continuous rated conditions. 1.2 Normative references The fol
31、lowing normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this Internati
32、onal Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 50(726):1982, International Electrotechnical Vocabulary (IEV) Chapter
33、 726: Transmission lines and waveguides. IEC 50(841):1983, International Electrotechnical Vocabulary (IEV) Chapter 841: Industrial electroheating. IEC 519-1:1984, Safety in electroheat installations Part 1: General requirements. IEC 519-6:1982, Safety in electroheat installations Part 6: Specificati
34、ons for safety in industrial microwave heating equipment. IEC 519-9:1987, Safety in electroheat installations Part 9: Particular requirements for high-frequency dielectric heating installations. IEC 1308:1994, High-frequency dielectric heating installations Test methods for the determination of powe
35、r output. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61307:1996 4 BSI 09-1999 1.3 Definitions For the purpose of this International Standard, the basic definitions are defined in IEC 50(726), IEC 50(841), IEC 519-6, IEC 519-9 and sup
36、plemented by the following definitions. 1.3.1 circulator three-port device, allowing incident power transmission, but deflecting (with the help of ferrites and magnetic field), reflected power to a third port equipped with a water load. See IEV 726-17-08 for full description of a circulator 1.3.2 mi
37、crowave output power type A equipment power measured in a calorimeter load defined in this standard when more than one microwave power generator is used in one installation, then the microwave output power of the installation will be the sum of the output of the individual microwave power generators
38、 as measured into the calorimeter load defined in this standard 1.3.3 microwave output power type B equipment microwave output power cannot be measured on type B equipment because its construction does not allow a circulator or water load to be interposed between the generator and the applicator. Th
39、erefore, only a calculated microwave output power can be specified when more than one microwave power generator is used in one installation, then the calculated microwave output power of the equipment cannot exceed the sum of the individual calculated microwave output powers 1.3.4 calculated microwa
40、ve output power the calculated microwave output power in watts P = U l ) where Section 2. Tests 2.1 Power output test loads There are three different types of output power test loads for use in microwave heating installations. Only the principals are outlined. Detailed constructions shall conform to
41、 known engineering techniques. 2.1.1 Calorimeter load A calorimeter load is used on independent microwave power generators or on type A equipment. It is used to determine the microwave output power of a microwave power generator where the normal load is replaced by this test load. 2.1.2 Dummy load A
42、 dummy load is used for applications where it is required only to dissipate the load power of a microwave power generator and not to measure the load power. The normal load is replaced by this test load. 2.1.3 Open-dish load An open-dish load is used for applications where it is required only to dis
43、sipate the load power in a microwave heating equipment and not to measure the load power. Section 3. Description of tests 3.1 Methods of test and measurements Measuring devices should not be affected by electromagnetic fields. 3.1.1 Calorimeter load The calorimeter load consists of a waveguide secti
44、on, equipped with a microwave transparent tube, through which water can flow. The water should be thoroughly mixed at the temperature measurement position. The power dissipated in the water is measured directly or compared with a calibrated heated water standard. These loads are commercially availab
45、le. When in use, the Voltage Standing Wave Ratio (VSWR) seen by the magnetron or klystron shall not exceed 1,2, or the value recommended by the magnetron or klystron manufacturer. A recommended water flow would be about 1 l/min per kW, but not less than 0,5 l/min. To avoid the formation of steam, wh
46、ich may lead to explosion, the water flow shall be monitored, for instance by means of flow interlocking switches. The water inlet temperature shall not exceed 35 C. The water outlet temperature shall not exceed 60 C. Uis the applied anode voltage, in volts; lis the anode current through the magnetr
47、on or klystron, in amperes; )is the efficiency quoted by the manufacturer of the magnetron or klystron or alternative microwave emitter for the operating conditions of the microwave power generator. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:15:29 GMT+00:00 2006, Uncontrolled Copy, (c
48、) BSI EN 61307:1996 BSI 09-19995 The difference between the outlet temperature and the inlet temperature shall be at least 10 K, to obtain results of an acceptable accuracy. The specific conductivity of the water shall lie between 200 4S/cm and 600 4S/cm, for frequencies below 900 MHz. For higher fr
49、equencies, any tap water can be used. When the microwave power generators are equipped with a circulator, capable of deflecting 100 % of the incident power, the latter can be used as a water load by short-circuiting the incident power exit port. The measurement shall be carried out only when the flow rate is stable and the load is in thermal equilibrium. It is necessary to use high-precision thermometers and flowmeters to ensure that the accuracy of power output measurement shall be within 5 %. The power output is calculated