prEN IEC 61340-4-7:2022
(Main)Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
This part of IEC 61340 provides test methods and procedures for evaluating and selecting air ionization equipment and systems (ionizers). This document establishes measurement techniques, under specified conditions, to determine offset voltage (ion balance) and decay (charge neutralization) time for ionizers. This document does not include measurements of electromagnetic interference (EMI), or the use of ionizers in connection with ordnance, flammables, explosive items or electrically initiated explosive devices. As contained in this document, the test methods and test conditions can be used by manufacturers of ionizers to provide performance data describing their products. Users of ionizers are urged to modify the test methods and test conditions for their specific application in order to qualify ionizers for use, or to make periodic verifications of ionizer performance. The user will decide the extent of the data required for each application. See Annex A for information regarding theoretical background and additional information on the standard test method for the performance of ionizers. CAUTION: Procedures and equipment described in this document can expose personnel to hazardous electrical and non-electrical conditions. Users of this document are responsible for selecting equipment that complies with applicable laws, regulatory codes and both external and internal policy. Users are cautioned that this document cannot replace or supersede any requirements for personnel safety. See Annex C for safety considerations.
Elektrostatik - Teil 4-7: Standard-Prüfverfahren für spezielle Anwendungen – Ionisation
Electrostatique - Partie 4-7: Méthodes d'essai normalisées pour des applications spécifiques - Ionisation
Elektrostatika - 4-7. del: Standardne preskusne metode za posebno uporabo - Ionizacija
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2022
Elektrostatika - 4-7. del: Standardne preskusne metode za posebno uporabo -
Ionizacija
Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
Elektrostatik - Teil 4-7: Standard-Prüfverfahren für spezielle Anwendungen – Ionisation
Electrostatique - Partie 4-7: Méthodes d'essai normalisées pour des applications
spécifiques - Ionisation
Ta slovenski standard je istoveten z: prEN IEC 61340-4-7:2022
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
101/650/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61340-4-7 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-04-08 2022-07-01
SUPERSEDES DOCUMENTS:
101/629/CD, 101/635A/CC
IEC TC 101 : ELECTROSTATICS
SECRETARIAT: SECRETARY:
Germany Mr Hartmut Berndt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
TITLE:
Electrostatics - Part 4-7: Standard test methods for specific applications - Ionization
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
IEC 61340-4-7/Ed3/CDV IEC (E) – 2 – 101/650/CDV
1 CONTENTS
2 FOREWORD . 4
3 INTRODUCTION . 6
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms and definitions . 7
7 4 Test fixture and instrumentation . 9
8 5 Specific requirements for equipment categories . 11
9 5.1 Specific requirements for all ionization equipment . 11
10 5.2 Room ionization . 12
11 5.3 Laminar flow hood ionization . 14
12 5.4 Work surface ionization . 16
13 5.5 Compressed gas ionizers – Guns and nozzles . 19
14 Annex A (informative) Theoretical background and additional information on the
15 standard test method for the performance of ionizers . 21
16 A.1 Introductory remarks . 21
17 A.2 Air ions . 21
18 A.3 Mobility and ion current . 21
19 A.4 Neutralization current . 21
20 A.5 Neutralization rate . 22
21 A.6 Ion depletion and field suppression . 22
22 A.7 Charged plate monitor and charge neutralization . 22
23 A.8 Relationship between charged plate monitor decay time and actual object . 23
24 A.9 Offset voltage . 23
25 A.10 Preparation of test area . 23
26 A.11 Ion transport in airflow . 24
27 A.12 Obstruction of airflow around the charged plate monitor . 24
28 A.13 Effect of “air blanket” . 24
29 A.14 Sources of measurement error . 25
30 A.14.1 Typical decay time variability . 25
31 A.14.2 Plate isolation . 25
32 A.14.3 Charging voltage . 25
33 A.14.4 Materials near the plate . 25
34 A.14.5 Other field-producing devices in test area . 25
35 A.14.6 Effect of offset voltage on decay time . 25
36 A.15 Importance of ionization equipment maintenance . 26
37 Annex B (normative) Method of measuring the capacitance of an isolated conductive
38 plate . 27
39 B.1 Method . 27
40 B.2 Equipment . 27
41 B.3 Procedure . 27
42 B.4 Example. 28
43 B.5 Sources of error . 28
44 B.5.1 Measuring equipment . 28
45 B.5.2 Poor plate isolation . 29
46 B.5.3 Objects in the environment . 29
47 B.5.4 Stray capacitance . 29
IEC 61340-4-7/Ed3/CDV IEC (E) – 3 – 101/650/CDV
48 Annex C (informative) Safety considerations . 30
49 C.1 General . 30
50 C.2 Electrical . 30
51 C.3 Ozone . 30
52 C.4 Radioactive . 30
53 C.5 X-ray . 30
54 C.6 Installation . 30
55 Bibliography . 30
57 Figure 1 – Charged plate monitor components for non-contacting plate measurement . 10
58 Figure 2 – Charged plate monitor components for contacting plate measurement . 10
59 Figure 3 – Conductive plate detail for the non-contacting CPM . 11
60 Figure 4 – Conductive plate detail for the voltage follower CPM . 11
61 Figure 5 – Test locations for room ionization – AC grids and DC bar systems . 13
62 Figure 6 – Test locations for room ionization – Single polarity emitter systems . 13
63 Figure 7 – Test locations for room ionization – Dual DC line systems . 14
64 Figure 8 – Test locations for room ionization – Pulsed DC emitter systems . 14
65 Figure 9 – Test locations for vertical laminar flow hood – Top view . 15
66 Figure 10 – Test locations for vertical laminar flow hood – Side view . 15
67 Figure 11 – Test locations for horizontal laminar flow hood – Top view . 16
68 Figure 12 – Test locations for horizontal laminar flow hood – Side view . 16
69 Figure 13 – Test locations for benchtop ionizer – Top view . 17
70 Figure 14 – Test locations for benchtop ionizer – Side view . 18
71 Figure 15 – Test locations for overhead ionizer – Top view . 18
72 Figure 16 – Test locations for overhead ionizer – Side view . 19
73 Figure 17 – Test locations for compressed gas ionizer (gun or nozzle) – Side view . 20
75 Table 1 – Test set-ups and test locations/points (TP) . 12
76 Table B.1 – Example measurement data . 28
IEC 61340-4-7/Ed3/CDV IEC (E) – 4 – 101/650/CDV
79 INTERNATIONAL ELECTROTECHNICAL COMMISSION
80 ____________
82 ELECTROSTATICS –
84 Part 4-7: Standard test methods for specific applications –
85 Ionization
88 FOREWORD
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