ISO INTERNATIONAL STANDARD 12384 First edition 2010-11-15 Aerospace Requirements for digital equipment for measurements of aircraft electrical power characteristics ConstructionsaérospatialesExigences relatives aux équipements numeriques de mesure des caractéristiques de puissance électrique aborddesaeronefs Reference number ISO 12384:2010(E) @ ISO 2010 yIHSunder Not for Resale ISO12384:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by Iso member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ISO2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or ISo's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 4122749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2010 - All rights reserved I without license from IHS Not for Resale ISO 12384:2010(E) Contents Page Foreword .iv Introduction 1 Scope 2 Normative references. 3 Terms and definitions. 4 Symbols... 5 Measurement requirements for the aircraft electric power characteristics ..... 5.1 General rules, measurement states and the admissible errors of the measurement results . 5.1.1 5.1.2 5.1.3 Admissibleerrorsofthemeasurementresults. 5.2 Measurement of constant frequency (cF) a.c. power system characteristics. 5.2.1 Steadystatecharacteristics 5.2.2 Transient characteristics... 5.3 Measurement of variable frequency (VF) a.c. power system characteristics, 5.4 Measurement of d.c. power system characteristics (28 V or 42 V system).. 5.4.1 Steady state characteristics......... 5.4.2 Transient d.c. voltage... 10 5.5 Measurement of current parameter.. 10 5.6 Measurementofpowertransfercharacteristics 10 5.7 Measurement of voltage spike characteristics ... 5.8 Measurement of power factor .. 10 6 General requirements for the measuring equipment . 11 6.1 Applicability 6.1.1 Efficiency..... 6.1.2 Operatingenvironment... 11 6.2 Performance and functions. 6.2.1 Accuracy. 6.2.2 6.2.3 Measurement resolution.... 11 6.2.4 Input impedance.. 11 6.2.5 Sampling frequency range .. 12 6.3 Electromagnetic compatibility ... 12 6.4 Human-machine interface project .. 12 6.5 The regulation of select measuring equipment 12 6.5.1 The measurement regulation of the data process software 12 6.5.2 Selecting requirement. Bibliography 13 Copyrght InternationalOrganizaionSadardizaoghtsreserved ii nse from IHS Not for Resale