ISO INTERNATIONAL STANDARD 7488 Secondedition 2018-04 Dentistry Mixing machines for dental amalgam Médecine bucco-dentaire - Melangeurs pour amalgame dentaire Reference number IS0 7488:2018(E) so Copyright International Organization for Standardization @ IS0 2018 IS0 7488:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP401·Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland Copyightilerational Organizationfor Standardization @ is0 2018 - All rights reserved IS0 7488:2018(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Requirements .2 4.1 Safety .2 4.1.1 Electrical. .2 4.1.2 Mechanical 2 4.2 .2 Stability. 4.3 Sound pressure 3 4.4 Frequency. .3 4.4.1 General. 3 4.4.2 Variable-power machines .3 4.5 Amplitude 3 4.6 Mixing time. 3 4.6.1 Timing device .3 4.6.2 Timing settings .3 4.7 Coherence time. ..4 4.8 Long-term test. .4 5 Sampling. ..4 5.1 Mixing machine ..4 5.2 Mixing-capsules 4 5.2.1 General. ..4 5.2.2 Mixing-capsule selection 4 5.3 Test components .5 6 Measurement and test methods. .5 6.1 Test conditions .5 6.1.1 General .5 6.1.2 Reference charge mass, mref .5 6.1.3 Minimum charge mass, mmin .5 6.1.4 Maximum charge mass, mmax .5 6.1.5 Maximum running duration, tmax .5 6.1.6 Power supply conditions and apparatus. 6.1.7 Equipment setup 6 6.2 Visual inspection. .6 6.3 Sound pressure. . 6 6.3.1 Apparatus and setup. ..6 6.3.2 Procedure. .7 6.3.3 Variable-power machines .7 6.4 Frequency tests.. 1 6.4.1 Measurement of mixing-capsule oscillation frequency .7 6.5 Working length ..8 6.5.1 Principle 6.5.2 Apparatus. ..8 6.5.3 Procedure. ..8 6.6 Amplitude. .8 6.6.1 Apparatus. ..8 6.6.2 Procedure. ..8 6.7 Mixing time .9 6.7.1 Apparatus. .9 6.7.2 Procedure. ..9 Copyight Intematioal OrgzISSahraizAl rights reserved iii