Standards World

IEC 61788-4:2020 pdf free download - superconductivity 5.3Cryostat for the resistance ( R ) measurement The cryostat shall include a specimen support structure and a liquid helium reservoir formeasurement of the resistance R,.The specimen support structure shall...

IEC 61788-4:2011 pdf free download - superconductivity 5.3Cryostat for the resistance，R2,measurement The cryostat shall include a specimen support structure and a liquid helium reservoir for theresistance，R2,measurement. The specimen support structure shall allow the specimen,which is mounted on...

IEC 61547:2020 pdf free download - Equipment for general lighting purposes- EMC immunity requirements Tests are applied to the relevant ports of the equipment as indicated in the respective clauses.For the purposes of this document,DC power ports...

IEC 61468:2000 pdf free download - Nuclear power plants -ln-core instrumentation - Characteristics and test methodsof self-powered neutron detectors 1 Scope and object This International Standard applies to in-core neutron detectors and instrumentation which aredesigned for purposes...

IEC 61326-1:2020 pdf free download - Electrical equipment for measurement,control and laboratory use - EMC requirements 4General Equipment and systems within the scope of this document can be subjected to various kindsof electromagnetic disturbances,sources of which include...

IEC 61083-1:2021 pdf free download - Instruments and software used for measurements in high-voltage andhigh-current tests 5.2lmpulse calibration lmpulse calibration is the reference method to establish the impulse scale factor of approveddigital recorders. lt is also the...

IEC 61300-3-5:2000 pdf free download - Fibre optic interconnecting devicesand passive components - Basic test and measurement procedures 4.1 Device under test (DUT) The DUT has two optical ports.The ports may be terminated with pigtails or with...

IEC 61000-6-4:2011 pdf free download - Electromagnetic compatibility (EMC) 1Scope and object This part of lEC 61000 for EMC emission requirements applies to electrical and electronicapparatus intended for use in industrial environments as described below. Emission requirements...

IEC 61000-3-2:2020 pdf free download - Electromagnetic compatibility (EMC) 3.14 stand-by mode non-operational,low power consumption mode (usually indicated in some way on theequipment) that can persist for an indefinite time 3.15 repeatability <results of measurements> closeness of...

IEC 60974-12:2011 pdf free download - Arc welding equipment The a.c. test voltage shall be of an approximate sine waveform with a peak value notexceeding 1,45 times the r.m.s. value, having a frequency of 50 Hz or...