Hong Kong Association for Testing, Inspection and Certification Ltd. S.W.N. Ho. (Electrical Products Testing)

Transcription

1 Hong Kong Association for Testing, Inspection and Certification Ltd. Professional Certification Scheme for Testing Personnel (Electrical Products Testing) S.W.N. Ho 1

2 Examination (CTT) Disclaimer Criteria, measurement techniques, methods and test standards as stipulated in respective Certification Criteria (CC01-CC06) are official documents. All examination questions are set based on these documents. All Certification Criteria are available for download from HKTIC s website 2

3 Scope of Certification Level Testing technician (CTT) Testing professional (CTP) Scope of electrical products testing (EPT) - technique base and selected test standards Safety (CHT-SF) Electromagnetic compatibility (EPT EMC) Green (EPT-GR) 3

4 Certification criteria 6 Certification Handbooks CC01 - Chemical testing CC02 Construction materials testing CC03 Electrical products testing CC04 Microbiological testing CC05 Textiles and garments testing CC06 Toys and hardlines testing 4

5 Certification criteria Foreword 1- General 2-Scope of Certification 3-Eligibility for Certification 4-Examination Procedure 5-Application procedure for certification/examination 6-Appeal 7-Obligation 5

6 Certification criteria Appendix 1 Examination Syllabus and Specimen Questions of CTT Appendix 2 Examination Syllabus and Specimen Questions of CTP Appendix 3 Training courses approved by Certification Board Appendix 4 Guidelines for counting CPDUs Appendix 5 References 6

7 Certification criteria Foreword Introduction of professional certification scheme for testing personnel (PCSTP) Benefits of the scheme General define application of the document 7

8 Certification Criteria Routes to be Certified Testing technician Diploma in relevant discipline + 2 years experience 10 years of experience Pass in examination (Scheme) Complete all the required training courses Certified Testing technician (CTT) 8

9 Certification Criteria Testing Professional Bachelor degree in relevant discipline + 3 years relevant experience CTT + 5 years of relevant supervisory experience post CTT HOKLAS AS+ 8 years of relevant experience 15 years of relevant experience, 5 years of which shall be at a managerial position Pass in examination (Scheme) Complete all the required training courses Professional interview Certified Testing Professional (CTP) 9

10 Certification criteria HOKLAS approved signatory with not less than 8 years of relevant experience (total relevant working experience); and the scope of signatory approval covering the major measurement techniques or methods as stipulated in this Certification Handbook for the sub-category the certification is being sought 10

11 Examination (CTT) Part A (30/100) Understanding of ISO/IEC (10%) Ethics (10%) Safety (10%) Part B (70/100) Techniques Equipment standards 11

12 Examination (CTT) Time = 120 minutes (2 hours) Passing marks >=60/100 Questions: 40 multiple choice questions (4 choices) 1.5 marks each 10 short questions 4 mark each Wrong answer for MC questions, deduce ½ of the mark i.e

13 Examination (CTT) Part A MC 1.5@ SQ 4@ Sub-total (marks) Ethics Safety Part B Sub-total 30 (>=12) Technical Subtotal 70 (>=28) Total (>=60) 13

14 Appendix 1 - CTT Understanding of ISO17025 (Outline for CTT) Document control Technical records Environmental and testing conditions Equipment calibration requirements Sample handling such as storage conditions, etc. Quality control requirement 14

15 Appendix 1 - CTT Management system documents generated by the laboratory should be uniquely identified. What pieces of information, name at least 4, should be included for such identification. 15

16 Appendix 1 - CTT Laboratory safety (knowledge) General laboratory safety Safety in electrical testing laboratories Use of fire extinguisher 16

17 Appendix 1 - CTT What are the duties of employees in a Workplace for Health and Safety? (a) Do not obstruct means of escape from a workplace (b) Ensure exit doors are not locked or fastened (c )Use protective equipment provided by the employer for use in manual handling operations (d) Take reasonable care for the safety and health of other persons in the workplace (A) (a), (b) and (c) (B) (b), (c) and (d) (C) (a), (c) and (d) (D) All 17

18 Appendix 1 (CTT) Prevention of Bribery Ordinance, Cap. 201 Corruption Advantages Improper influence Confidentiality and proprietary right CSTP01 Regulations Certification Scheme of Testing Personnel Code of ethics in general Code of ethics in relation to employer Code of ethics in relation to public Obligation of Certified Testing Personnel Use of Certification symbol and claim of certification status 18

19 Appendix 1 - CTT According to the Prevention of Bribery Ordinance, name 2 things that are considered as advantages. 19

20 Appendix 1 - CTT Understanding on test standard and measurement techniques Understanding of common electrical and electronic components, such as various types of motors, insulation, electronic components including semiconductor devices, transformers, fuses and means of electrical connections (i.e. different types of connectors, size of wires, etc.), and how they affect safety. Connection diagram Measurement techniques for one sub-category as given in Appendix 5 Requirements of test standards for the selected subcategory as given in Appendix 7 20

21 Appendix 1 - CTT Knowledge on general equipment and specific equipment The criteria for selection of measurement equipment Understanding of equipment calibration and measurement traceability, S.I. units Understanding of use of equipment for electrical and one sub-category as given in Appendix 6 21

22 Appendix 5 sub-category Safety tests Electrical measurements Temperature measurements Physical and mechanical measurements Materials analysis 22

23 Appendix 5 sub-category Electromagnetic compatibility tests Electrical measurements Time and frequency EMC tests 23

24 Appendix 5 sub-category Green tests Electrical measurements Temperature measurement Thermo radiation Material analysis 24

25 Appendix 5 sub-category Electrical Measurements measurement of resistance principles of operation of digital multimeters and calibrators measurement of direct voltage and current principles of calibration measurement of alternating voltage and current measurement of high voltage guarding, grounding and shielding cables and connectors 25

26 Appendix 5 sub-category Electromagnetic Compatibility (EMC) Emission tests Types of interference and their measurements Harmonic current Voltage fluctuation and flicker Immunity tests radio-frequency fields susceptibility Electrical fast transient/ burst susceptibility Electrostatic discharge susceptibility Surge susceptibility Voltage dips, short interruption and voltage variation susceptibility 26

27 Appendix 5 sub-category Physical and mechanical tests distinguish creepage distances and clearances use of Length or gap gauges means to protect probes, pins and gauge from rusting Linear and angular measurement Roundness Evaluation Methods Durameters Eddy Current and Indentation Testing, Range and Application of Scales, Conversion Relationships for hardness measurements Roughness average 27

28 Appendix 5 sub-category Material Analysis Flammability tests Types of flammability and their measurements Glow wire tests Ball pressure tests Needle flame tests 28

29 Appendix 5 sub-category Temperature Measurements physics of temperature measurement temperature scale, traceability and international standards thermocouple electromotive force, measurement and calibration properties of thermocouples and systematic errors 29

30 Appendix 5 sub-category Thermo radiation SI units Wave and particles model and speed of propagation Thermal radiation and electromagnetic radiation as a form of heat and its measurement Electromagnetic spectrum light and radio waves and their measurements 30

31 Appendix 5 sub-category Time and Frequency Measurements clocks, oscillators and frequency standards time scales and international timekeeping evaluating the performance of time and frequency standards selection of clocks and oscillators to suit applications computer time and Network Time Protocol frequency and time interval measuring instruments measurement and analysis techniques for time and frequency calibrations rf and microwave devices fibre optics background 31

32 Appendix 6 - Equipment Common Signal generator Multi meter Frequency converter Length measuring devices Weight measuring devices Force measuring devices 32

33 Appendix 6 Equipment Safety test Ball pressure test apparatus Environmental chambers Fixtures and dimension gauges Force and torque gauges Glow-wire test apparatus Leakage current meter Spectrum analyzers 33

34 Appendix 6 Equipment Safety test Spring operated impact hammers Surge generators Temperature recorders Test fingers High port tester Tracking tester Power analyzers Oscilloscope 34

35 Appendix 6 Equipment EMC test Anechoic chambers Antennae Absorbing clamps Electromagnetic field probes EMI Receivers Environmental chambers ESD Guns 35

36 Appendix 6 Equipment EMC test Fast transient burst generators LISN Spectrum analyzers Surge generators Voltage dip generators Oscilloscope 36

37 Appendix 6 Equipment Green test Environmental chambers Oscilloscope 37

38 Appendix 7 sub-category Test standards for Safety tests IEC (UL 60950) Information technology equipment Safety IEC (UL60065) Audio, video and similar electronic apparatus - Safety requirements IEC Safety of electrical household appliances IEC (UL 1598) Luminaires IEC Medical Electrical Equipment 38

39 Appendix 7 sub-category Test standards for Electromagnetic compatibility tests IEC Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current 16 A per phase) IEC Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current 16 A per phase and not subject to conditional connection EN Sound and television broadcast receivers and associated equipment. Radio disturbance characteristics. Limits and methods of measurement 39

40 Appendix 7 sub-category Test standards for Electromagnetic compatibility tests EN55014 Electromagnetic compatibility. Requirements for household appliances, electric tools and similar apparatus. Emission EN55020 Sound and television broadcast receivers and associated equipment. Immunity characteristics. Limits and methods of measurement EN55022 Information technology equipment. Radio disturbance characteristics. Limits and methods of measurement 40

41 Appendix 7 sub-category Test standards for Electromagnetic compatibility tests ETSI EN ElectroMagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services ESTI EN ElectroMagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services 41

42 Appendix 7 sub-category Test standards for Green tests IEC Methods of measurement for the power consumption of audio, video and related equipment IEC Household electrical appliances - Measurement of standby power AS/NZS /.2 Performance of External Power Supplies IEC Household Refrigerating Appliances Characteristics and test methods ISO 5151 Non-ducted air conditioners and heat pumps -- Testing and rating for performance 42

43 Appendix 7 sub-category Test standards for Green tests AS/NZS /.2 Performance of External Power Supplies IEC Household Refrigerating Appliances Characteristics and test methods ISO 5151 Non-ducted air conditioners and heat pumps -- Testing and rating for performance ANSI/AHAM DH-1 Dehumidifiers IEC Methods for measuring the performance of electric storage water-heaters for household purposes 43

44 Appendix 7 sub-category Test standards for Green tests IEC Clothes washing machines for household use Methods for measuring the performance IEC Self-ballasted lamps for general lighting services Performance requirements CIE 84 Measurement of Luminous Flux IEC Method of measurement of centre beam intensity and beam angle(s) of reflector lamps IEC/PAS Self-ballasted LED-lamps for general lighting services - Performance requirements 44

45 Specimen Questions Safety tests Which of the following is not considered as SELV (Safety Extra-low voltage) A < 40V B < 50V C > 25 and <40V D > 25 and < 55V What are the four main factors required to determine the creepage distance requirements (IEC60335)? 45

46 Specimen Questions EMC tests Which of the following immunity test will not be applied for Category II apparatus in EN ? (a) radio frequency electromagnetic fields (b) fast transients (c) injected currents up to 230 MHz (d) surges Why artificial hand is used in EN ? When the artificial hand shall be applied? 46

47 Specimen Questions Green tests Which unit is used for annual energy consumption in energy label typically? (a) kva (b) kw (c ) kwh (d) kj What is the definition of self-ballasted LED-lamp IEC/EN 62612? 47

48 Specimen Questions General equipment Which of the following best used to measure the thickness enclosure around 0.5mm (a) Steel ruler (b) Caliper (c ) X10 microscope (d) micrometer 48

49 END OF SESSION Thank you 49

50 Examination (CTP) Part A (50%) ISO/IEC quality control (15%) Ethics (10%) Safety (5%) Management (10%) Measurement Uncertainty (10%) Part B (50%) Reporting, test standards and techniques Equipment 50

51 Examination (CTP) Time = 180 minutes (3 hours) Passing marks >=60/100 Questions: 30 multiple choice questions (4 choices) 1 mark each, Wrong answer for MC questions, deduce ½ of the mark i.e short questions 5 mark each 2-3 long questions 2 x10 marks 1 x 20 marks 51

52 Examination (CTP) Part A MC 1@ SQ 5@ LQ (10-20) Sub-total (marks) 17025/quality Ethics Safety 5 5 Management 1 x Uncertainty Part B Sub-total 50 (>=20) Technical x 20, 1 x10 50 Subtotal 50 (>=20) Total (>=60) 52

53 Appendix 2 CTP Management requirements Management skills Manager s Basic Functions Time Management Communication in Your Workplace Team Building Basic understanding of concepts Delegation and Management of Generation Y 53

54 Appendix 2 CTP You heard a loud noise and realize that one of your staff is pointing her finger at another staff. They were blaming each other for over looking a client s request for a particular lab test, as a result the client file a complaint to Customer service department. The female staff is the supervisor and she complains that the other staff never read the request carefully, and is not the first time he overlooked the client s request. What will you do and what will be your concerns? What will be the worst case scenario for this situation? What will be your best case scenario in this case? 54

55 Appendix 2 CTP Laboratory Management (Detailed Knowledge in the following aspects) Document control Review of contract Subcontracting Verification of critical consumables Difference between correction and corrective actions and control of non-conforming work Preventive actions 55

56 Appendix 2 CTP Technical records connection diagrams Environmental and sample conditioning requirement Traceability (equipment) Sample identification and integrity within the laboratory 56

57 Appendix 2 CTP Quality assurance procedures and plan Method verification Minimum method verification in complying with specification of test standards Difference between verification and validation Participation in proficiency testing programme, interlaboratory comparison programme Verification of continuing competence Drafting of test procedures Statistical treatments of data and quality control requirement (detailed knowledge) Basic statistics such as U distribution, normal distribution, standard deviation 57

58 Appendix 2 CTP Define corrective and preventive actions and illustrate their difference with an example. 58

59 Appendix 2 CTP Laboratory safety (knowledge) General laboratory safety Safety in electrical testing laboratories Use of fire extinguisher 59

60 Appendix 2 CTP Laboratory safety (knowledge) Guidebooks from Labour Department of HKSAR A brief guide to first aid A brief guide to the Occupational Safety and Health Ordinance A brief guide to the Occupational Safety and Health Regulation Code of practice on safety management Guidelines for good occupational hygiene practice in a workplace 60

61 Appendix 2 CTP What are the factors affecting the selection of fire extinguisher? Personnel must be trained in the use of extinguishers Size and mass of the fire extinguisher The minimum distance of travel Environment for installing fire extinguisher (A) (a), (b) and (c) (B) (a), (b) and (d) (C) (a), (c) and (d) (D) (b), (c) and (d) 61

62 Appendix 2 (CTP) Prevention of Bribery Ordinance, Cap. 201 Corruption Advantages Improper influence Confidentiality and proprietary right CSTP01 Regulations Certification Scheme of Testing Personnel Code of ethics in general Code of ethics in relation to employer Code of ethics in relation to public Obligation of Certified Testing Personnel Use of Certification symbol and claim of certification status 62

63 Appendix 2 - CTP According to the Prevention of Bribery Ordinance, name 2 things that are considered as advantages. 63

64 Appendix 2 CTP Estimation of Measurement Uncertainty Approaches : ISO GUM Factors affecting uncertainty Reporting of uncertainty and compliance 64

65 Appendix 2 CTP Define experimental standard deviation of mean and what is the related standard uncertainty? 65

66 Appendix 2 CTP Measurement techniques and test standards of one sub-category as given in Appendix 5 Rationale in performing the tests Application of the techniques to standards of the sub-category as given in Appendix 7 66

67 Appendix 2 CTP Requirements of the following general equipment calibration: Equipment for one sub-category as given in Appendix 6 67

68 Specimen questions Safety What is Insulation Resistance Test? EMC Draw a simple diagram to illustrate the disturbance voltage test setup and the power disturbance test setup? (EN55014) Green How to judge the larger mass light load frozen in 24h? IEC

69 END OF SESSION Thank you 69