BS EN 61307:2011 pdf free download Industrial microwave heating installations — Test methods for the determination of power output
1 Scope
This International Standard specifies test methods for the determination of the availablemicrowave output power and the efficiency of frequency conversion from the electrical input inindustrial microwave heating installations.
This standard also specifies test methods for assessing the microwave power deposition inthe microwave workload – the microwave workload power, in microwave-only installations.
This standard is applicable to industrial microwave heating equipment and installations in thefrequency range from 300 MHz to 300 GHz.
This standard relates to industrial microwave heating equipment operating under normal load.
This standard does not apply to appliances for household and similar use (covered byIEC 60335-2-25), commercial use (covered by lEC 60335-2-90) or laboratory use (covered byIEC 61010-2-010).
2Normative references
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60050-221:1990,International Electrotechnical Vocabulary – Chapter 221: Magneticmaterials and components
Amendment 1(1993)
Amendment 2 (1999)Amendment 3 (2oo7)
IEC 60050-841:2004,International Electrotechnical Vocabulary – Part 841: Industrialelectroheat
IEC 60050-726:1982,International Electrotechnical Vocabulary – Chapter 726: Transmissionlines and waveguides
IEC 60519-6,Safety in electroheat installations – Part 6: Specifications for safety in industrialmicrowave heating equipment
3Terms and definitions
For the purposes of this document, the terms and definitions of IEC 60519-6 andlEC60050-841 as well as the following apply.
3.1
calorimetric power metercalorimeter power meter
power meter which uses temperature rise in a medium as a means of measuring absorbedpower
NOTEThe medium, typically water, is either the power-absorbing agent or has heat transferred to it from apower-absorbing element.
[IEC 60050-726:1982,726-21-10]
3.2
circulator
passive device having three or more ports in which the power entering any port is transmittedto the next port according to a given order of sequence
NOTE The typical forms are junction circulators [IEC 60050-221:1990,221-05-14] of the T junction[IEC 60050-726:1982,726-17-12] or Y junction [IEC 60050-726:1982,726-17-13].
[EC 60050-221:1990,221-05-11,modified]
3.3
cross coupling (between generators)
appearance of undesired microwave energy in a microwave generator or the transmission lineoutput port of a microwave generator assembly caused by one or several other microwavegenerators or microwave generator assemblies
3.4
electrical efficiency of microwave heating equipment
quotient between the available microwave power output and the electric input to the mainsfrequency power supply or microwave generator assembly,at power settings for normaloperation
3.5
insertion loss
loss resulting from the insertion of a network into a transmission system,the ratio of thepower delivered to that part of the system following the network,before insertion of thenetwork, to the power delivered to that same part after insertion of the network
NOTE The insertion loss is generally expressed in decibels.
[IEC 60050-726:1982,726-06-07]
3.6
isolation (of a three-port circulator)
reverse attenuation between the main output port and main input port,with all ports beingimpedance matched
NOTE 1 The isolation should not be confused with the reverse loss occurring between adjacent ports.NOTE 2 This is a special case of cross coupling of a circulator [IEC 60050-726:1982,726-16-06].3.7
means of access
all structural features of the microwave heating equipment which can be opened or removedwithout the use of a tool to provide access to the interior of the microwave applicator ormicrowave cavity
3.8
microwave applicator
structure which applies the microwave energy to the load
[IEC 60050-841:2004,841-29-11]
[IEC 60050-841:2004,841-29-19,modified]
3.10
microwave enclosure
structure which is intended to confine the microwave energy to a defined regionNOTE Examples are a cavity, door seals and waveguides.
[IEC 60050-841:2004,841-29-20]
3.11
microwave generator
source used to produce electromagnetic energy in the frequency range from 300 MHz to300 GHz
[IEC 60050-841:2004,841-29-16]
NOTE In the context of this standard,the microwave generator is only the component where the frequencyconversion takes place.See 3.2.
3.12
microwave generator assembly
part of the microwave heating equipment comprising an apparatus producing microwaveenergy and its associated transmission line output port
NOTE 1 The assembly includes the microwave generator, the power supply of the microwave generator and its ancillaryand control circuits. lf a circulator is used, it is also included.
NOTE 2 Microwave heating equipment containing a microwave generator assembly was classified as Type A inearlier editions of this standard; equipment where a transmission line output port is not available was classified asType B.
3.13
microwave heating equipment
assembly of electric and mechanical devices intended for the transfer of microwave energy tothe microwave load and comprising in general power supplies,microwave generators ormicrowave generator assemblies with cooling’arrangements and circulators if used,microwave applicators or cavities with ventilation arrangements if used,interconnectingcables and waveguides,control circuitry,and means for transporting the microwave load ifused