Surface cleaning appliances - Part 4: Cordless dry vacuum cleaners for household or similar use - Methods for measuring the performance

This part of IEC 62885 is applicable to measurements of the performance of cordless dry
vacuum cleaners for household use or under conditions similar to those in households. The
results obtained under this document are intended to be comparable to the results obtained
under IEC 62885-2 for mains-connected vacuums.
The purpose of this document is to specify essential performance characteristics of cordless
dry vacuum cleaners which are of interest to users and to describe methods for measuring
these characteristics.
NOTE 1 Owing to the influence of environmental conditions, variations in time, origin of test materials and
proficiency of the operator, most of the described test methods give more reliable results when applied to
comparative testing of a number of appliances at the same time, in the same laboratory and by the same operator.
NOTE 2 This document is not intended for mains-operated vacuum cleaners or cleaning robots.
NOTE 3 Cordless handheld vacuums are excluded, except for 5.7.2 and 5.8.
For safety requirements, reference is made to IEC 60335-1 and IEC 60335-2-2.
A recommendation on information for the consumer at the point of sale is given in Annex B of
IEC 62885-2.

Geräte zur Oberflächenreinigung - Teil 4: Schnurlose Trockensauger für den Hausgebrauch und ähnliche Anwendungen - Prüfverfahren zur Bestimmung der Gebrauchseigenschaften

Appareils de nettoyage des sols - Partie 4: Aspirateurs à sec sans fil à usage domestique ou analogue - Méthodes de mesure de l'aptitude à la fonction

L'IEC 62885-4:2020 s'applique aux mesures de l'aptitude à la fonction des aspirateurs à sec sans fil à usage domestique ou utilisés dans des conditions similaires. Les résultats obtenus dans le présent document sont destinés à être comparés à ceux de l'IEC 62885-2 pour les aspirateurs raccordés au réseau.
Le présent document a pour objet de spécifier les caractéristiques essentielles d'aptitude à la fonction des aspirateurs à sec sans fil présentant un intérêt pour les utilisateurs et de décrire des méthodes de mesure de ces caractéristiques.
La présente norme doit être lue conjointement avec l'IEC 62885-2:2016, à laquelle elle fait référence, et qui s'applique sauf spécification contraire dans la présente norme.

Naprave za površinsko čiščenje - 4. del: Brezvrvični vakuumski čistilniki za kemično čiščenje za gospodinjsko in podobno uporabo - Metode za merjenje lastnosti

General Information

Status
Published
Publication Date
08-Oct-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Oct-2020
Due Date
07-Dec-2020
Completion Date
09-Oct-2020

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SLOVENSKI STANDARD
SIST EN IEC 62885-4:2020
01-november-2020
Naprave za površinsko čiščenje - 4. del: Brezvrvični vakuumski čistilniki za
kemično čiščenje za gospodinjsko in podobno uporabo - Metode za merjenje
lastnosti

Surface cleaning appliances - Part 4: Cordless dry vacuum cleaners for household or

similar use - Methods for measuring the performance
Ta slovenski standard je istoveten z: EN IEC 62885-4:2020
ICS:
97.080 Aparati za čiščenje Cleaning appliances
SIST EN IEC 62885-4:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62885-4:2020
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SIST EN IEC 62885-4:2020
EUROPEAN STANDARD EN IEC 62885-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 97.080
English Version
Surface cleaning appliances - Part 4: Cordless dry vacuum
cleaners for household or similar use - Methods for measuring
the performance
(IEC 62885-4:2020)

Appareils de nettoyage des sols - Partie 4: Aspirateurs à Geräte zur Oberflächenreinigung - Teil 4: Schnurlose

sec sans fil à usage domestique ou analogue - Méthodes Trockensauger für den Hausgebrauch und ähnliche

de mesure de l'aptitude à la fonction Anwendungen - Prüfverfahren zur Bestimmung der

(IEC 62885-4:2020) Gebrauchseigenschaften
(IEC 62885-4:2020)

This European Standard was approved by CENELEC on 2020-08-17. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62885-4:2020 E
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SIST EN IEC 62885-4:2020
EN IEC 62885-4:2020 (E)
European foreword

The text of document 59F/397/FDIS, future edition 1 of IEC 62885-4, prepared by SC 59F "Surface

cleaning appliances" of IEC/TC 59 "Performance of household and similar electrical appliances" was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62885-4:2020.

The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-05-17

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-08-17

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association.
Endorsement notice

The text of the International Standard IEC 62885-4:2020 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 62885-4:2020
EN IEC 62885-4:2020 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),

the relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 62301 (mod) 2011 Household electrical appliances - EN 50564 2011
Measurement of standby power
IEC 62885-2 2016 Surface cleaning appliances - Part 2: Dry - -
vacuum cleaners for household or similar
use - Methods for measuring the
performance
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SIST EN IEC 62885-4:2020
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SIST EN IEC 62885-4:2020
IEC 62885-4
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Surface cleaning appliances –
Part 4: Cordless dry vacuum cleaners for household or similar use –
Methods for measuring the performance
Appareils de nettoyage des sols –
Partie 4: Aspirateurs à sec sans fil à usage domestique ou analogue –
Méthodes de mesure de l'aptitude à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.080 ISBN 978-2-8322-8597-8

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 62885-4:2020
– 2 – IEC 62885-4:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General conditions for testing .......................................................................................... 6

5 Dry vacuum cleaning tests ............................................................................................... 8

6 Miscellaneous tests ....................................................................................................... 15

7 Test material and equipment ......................................................................................... 19

8 Instructions for use ........................................................................................................ 19

Annex A (informative) Information on materials .................................................................... 20

Annex B (informative) Information at the point of sale .......................................................... 21

Annex C (normative) Guidance specification on verified carpets .......................................... 22

Annex D (informative) Reference vacuum cleaner system (RSB) ......................................... 23

Annex E (informative) Maintenance of the RSB .................................................................... 24

Bibliography .......................................................................................................................... 25

Figure 101 – Air data curves ................................................................................................... 9

Figure 102 – Carpet and hard floor test plates with suction tap locations .............................. 12

Figure 103 – Test setup runtime determination ..................................................................... 13

Table 101 – Overview of duration and the values that should be reported ............................. 16

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SIST EN IEC 62885-4:2020
IEC 62885-4:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SURFACE CLEANING APPLIANCES –
Part 4: Cordless dry vacuum cleaners for household or similar use –
Methods for measuring the performance
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC

Publication(s)"). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62885-4 has been prepared by subcommittee 59F: Surface

cleaning appliances, of IEC technical committee 59: Performance of household and similar

electrical appliances.
The text of this International Standard is based on the following documents:
FDIS Report on voting
59F/397/FDIS 59F/404/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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– 4 – IEC 62885-4:2020 © IEC 2020

This standard is to be read in conjunction with IEC 62885-2:2016, to which it refers, and

which is applicable unless otherwise specified in this standard. In order to simplify the

indication of corresponding requirements, the same numbering of clauses and subclauses is

used as in IEC 62885-2:2016. Amendments to these clauses and subclauses are given under

the same references whilst additional subclauses, tables, figures and notes are numbered

from 101. Additional annexes are lettered AA, BB, etc.

A list of all the parts in the IEC 62885 series, under the general title Surface cleaning

appliances, can be found on the IEC website.
In this standard, the following print types are used:
– terms defined in Clause 3: bold type

Where the term dry vacuum cleaner is used, it shall be read cordless dry vacuum cleaner.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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SIST EN IEC 62885-4:2020
IEC 62885-4:2020 © IEC 2020 – 5 –
SURFACE CLEANING APPLIANCES –
Part 4: Cordless dry vacuum cleaners for household or similar use –
Methods for measuring the performance
1 Scope

This part of IEC 62885 is applicable to measurements of the performance of cordless dry

vacuum cleaners for household use or under conditions similar to those in households. The

results obtained under this document are intended to be comparable to the results obtained

under IEC 62885-2 for mains-connected vacuums.

The purpose of this document is to specify essential performance characteristics of cordless

dry vacuum cleaners which are of interest to users and to describe methods for measuring

these characteristics.

NOTE 1 Owing to the influence of environmental conditions, variations in time, origin of test materials and

proficiency of the operator, most of the described test methods give more reliable results when applied to

comparative testing of a number of appliances at the same time, in the same laboratory and by the same operator.

NOTE 2 This document is not intended for mains-operated vacuum cleaners or cleaning robots.

NOTE 3 Cordless handheld vacuums are excluded, except for 5.7.2 and 5.8.
For safety requirements, reference is made to IEC 60335-1 and IEC 60335-2-2.

A recommendation on information for the consumer at the point of sale is given in Annex B of

IEC 62885-2.
2 Normative references
Clause 2 of IEC 62885-2:2016 applies with the following addition:

IEC 62885-2:2016, Surface cleaning appliances – Part 2: Dry vacuum cleaners for household

or similar use – Methods for measuring the performance
IEC 62301:2011, Household electrical appliances – Measurement of standby power
3 Terms and definitions
Clause 3 of IEC 62885-2:2016 applies with following additions.
3.101
cordless dry vacuum cleaner
dry vacuum cleaner that is not mains-operated

Note 1 to entry: The term "cordless" is equivalent to "battery-operated" throughout the document.

3.102
fully charged

point during charging when, according to the manufacturer's instructions, by indicator or time

period, the product does not need to be charged anymore (see 4.6.101 for specific charging

instructions)
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SIST EN IEC 62885-4:2020
– 6 – IEC 62885-4:2020 © IEC 2020
3.103
fully discharged

point in use when the manufacturer's instructions state the product is fully discharged or the

vacuum motor stops spinning, whichever comes first
3.104
charging time

time required to fully charge a cordless dry vacuum cleaner from a fully discharged

condition
3.105
replacement battery

battery that is identical in type, fit and performance to the battery supplied with the cordless

product, and is changeable without tools
3.106
runtime

effective cleaning time provided by a cordless dry vacuum cleaner from a fully charged

condition as per 3.102 until the vacuum has dropped to less than 40 % of initial suction

performance or when the vacuum is fully discharged as per 3.103, whichever comes first

4 General conditions for testing
Clause 4 of IEC 62885-2:2016 applies with the following modifications.
4.3 Voltage and frequency
Replace the content of 4.3 of IEC 62885-2:2016 with the following:

Unless otherwise stated, charging for measurements shall be carried out at rated voltage with

a tolerance of ±1 % and, if applicable, at rated frequency.

Cordless dry vacuum cleaner chargers not marked with rated frequency shall be powered at

either (50 ± 1) Hz or (60 ± 1) Hz with a total harmonic distortion < 3 %, as is common in the

country of use. All charging should occur at the nominal system voltage of the country

concerned.
4.4 Running-in of dry vacuum cleaner
Replace the heading and content of 4.4 of IEC 62885-2:2016 with the following:
4.4 Running-in of cordless dry vacuum cleaner

Prior to the first test (and following preparations in line with the manufacturer's instructions)

on a new cordless dry vacuum cleaner, it shall be fully charged in accordance with the

manufacturer's instructions and then discharged by running with unrestricted air flow. The

sequence shall be repeated one more time with an interval of at least 30 min after each

discharge. No operation shall be carried out during this waiting time. For active nozzles

during discharge, the agitation device shall be running but not in contact with the floor.

Prior to conducting any series of tests, the age, condition, and history of the product shall be

recorded.
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IEC 62885-4:2020 © IEC 2020 – 7 –
4.4.101 Preparation of battery

Any unused Li-ion battery shall be fully charged and fully discharged once prior to

conducting the first test on a cordless dry vacuum cleaner. All other battery

chemistry/technology types shall be fully charged and fully discharged three times prior to

conducting the first test on a cordless dry vacuum cleaner. Fully charged and fully

discharged conditions are defined in 3.102 and 3.103, respectively.

NOTE It is understood that some cordless vacuums do not allow discharge below a certain energy level for

battery protection.
4.6 Operation of the dry vacuum cleaner

Subclause 4.6 of IEC 62885-2:2016 applies with the following addition to the end of the

subclause:

For declaration and compliance purposes, related tests for a given cleaning task shall be

conducted with the same cordless dry vacuum cleaner setting, cleaning head and cleaning

head setting. These settings shall be reported. Related tests are:

– tests measuring the dust removal from carpet, the energy consumption for cleaning a

carpet, runtime on carpet, and the noise level on carpet;
– tests measuring the dust removal from hard floor with crevices and the energy

consumption for cleaning a hard floor with crevices, runtime on hard floor, and the noise

level on hard floor.
4.6.101 Charging of the cordless dry vacuum cleaner

All testing performed on cordless dry vacuum cleaners is to be non-invasive. Only the

battery(-ies) provided with the product, and replacement battery(-ies) as per 3.105, shall be

used to power the vacuum. Each test is started with a fully charged sample, as per 3.102.

The manufacturer's charging unit, module, or docking system that is provided with the specific

cordless dry vacuum cleaner under test, shall be used for recharging the battery to a fully

charged state. The charging time could be 24 h in length or longer, as determined by the

items below. Proceed in the following order until a charging duration is determined.

a) If the battery charger, appliance (the charged device), the battery itself, or any kind of user

interface (e.g. app) has an indicator to show that the battery is fully charged, that

indicator shall be used as follows:

• If the indicator shows that the battery is fully charged within 19 h, the charging shall

be continued for at least 5 h beyond the full indication. The charging shall be
terminated at not more than 24 h.

• Conversely, if the full-charge indication has not appeared within 19 h of charging, the

charging shall continue until 5 h after the indication is present.

b) If there is no indicator, but the manufacturer's instructions indicate that charging this

battery or this capacity of battery should be complete within 19 h, the charging shall be for

24 h. If the instructions indicate that charging may take longer than 19 h, the charging

shall be run for the longest estimated charge time plus 5 h.

c) If there is no indicator and no time estimate in the manufacturer's instructions, but the

charging current is stated on the charger or in the instructions, calculate the charging

duration D in h as the longer of 24 h or:
D=1,4×+ 5 h
where
D is the duration in h;
C is the rated charge capacity in Ah;
I is the charge current in A.
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d) If none of the above applies, the duration of the charging shall be 24 h.
4.6.1.102 Battery conditions for testing

After a full charge, the cordless dry vacuum cleaner should be tested no earlier than 30 min

and no later than 12 h. The cleaner shall be disconnected from the charger during this period.

Make a note in the report if it is not possible to test owing to a short runtime.

This document does not currently address changing performance throughout the whole

runtime of some appliances. Results at different states of battery charge can vary. The

subclauses potentially affected are 5.1 to 5.6, 5.8 to 5.11 and 6.16. It is recommended to

perform test 5.101 first to understand the potential effect of discharge.

For tests where more than one repeat is needed, testing should be carried out within the

"90 % performance runtime" (t ) as determined in 5.101. However, if during the repeat,

90%rt

the "90 % performance runtime" of the cordless dry vacuum cleaner is exceeded, that

repeat shall be annulled, and the product is to be fully charged or a replacement battery be

employed to repeat the test.
4.7 Conditioning prior to each test
Subclause 4.7 of IEC 62885-2:2016 is not applicable.
5 Dry vacuum cleaning tests
Clause 5 of IEC 62885-2:2016 applies with the following modifications.
5.1.5 Preconditioning of dust receptacle

Subclause 5.1.5 of IEC 62885-2:2016 is applicable with the following modification in

paragraphs 2 and 4:

The cordless dry vacuum cleaner under test is equipped with a clean dust receptacle and

allowed to run with an unimpeded air flow with the nozzle clear of the surface for 30 s.

Since the cordless dry vacuum cleaner air flow can have an effect on the weight mass of

the dust receptacle during the 30 s of preconditioning, caution should be taken so that the

weight mass of the dust receptacle has stabilized before weighing.
5.8.1 Purpose
Subclause 5.8.1 of IEC 62885-2:2016 applies with the following addition:

P , the input power and η, the efficiency, are not relevant for cordless dry vacuum cleaners.

5.8.5 Determination of air data

Subclause 5.8.5 of IEC 62885-2:2016 applies with the second paragraph and Figure 9

removed; the third paragraph is replaced by the following paragraph, and Figure 101 is added:

For each measuring point, the air flow and vacuum are recorded 15 s after the throttling. The

cleaner is then again operated unthrottled for 15 s. This procedure is continued until all the

entire curves have been plotted, the measuring point for maximum vacuum being the last one.

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IEC 62885-4:2020 © IEC 2020 – 9 –
Key
h vacuum in the measuring box, in kilopascals (kPa)
q air flow, in litres per second (l/s)
P suction power, in watts (W)
Figure 101 – Air data curves
5.9.2.1 Test conditions

Subclause 5.9.2.1 of IEC 62885-2:2016 applies with the second bullet point replaced with the

following:
• The plenum chamber shall be fitted with a 19 mm orifice plate.
5.9.2.3 Procedure

Subclause 5.9.2.3 of IEC 62885-2:2016 applies with the second paragraph replaced with the

following:

With the feed tube closed, the cordless dry vacuum cleaner is run for at least 15 s.

Subsequently, the initial vacuum, h , shall be determined.
5.10 Total emissions while vacuum cleaning
Subclause 5.10 of IEC 62885-2:2016 does not apply, but is under consideration.
5.11.5 Verification of particle transport
Subclause 5.11.5 of IEC 62885-2:2016 is replaced by:

NOTE 101 There are known issues with the particle transport within this test. Measures are under development to

ensure and verify a proper particle transport. Changes may be necessary to the measuring equipment or to the way

the test is performed.
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5.11.6 Test procedure
Subclause 5.11.6 of IEC 62885-2:2016 is replaced by:

The test can be conducted either by using a single particle counter that is switched between

the intake and exhaust channels while counting, or by using two particle counters that count

intake and exhaust samples simultaneously.

Particle registration is carried out by a particle analysing system (see 7.3.8.5) that can be

operated with a suitable aerosol dilution system to adapt the count rate capacity and the

particle concentration of the aerosol intake and the exhaust channel, respectively. The results

of any single trial shall be recorded as follows:

• counter events/class; i.e. the number of events recorded by the particle counter, separately

for each range of particle size as well as for aerosol intake channel and exhaust channel;

• sample air volumes, VA (exhaust) and VA (intake); i.e. the volumes of the aerosol

ex in
samples analysed by the particle counter combined in the course of the trial;

• applicable dilution factors k (intake or exhaust) of the particle analysis system; i.e. the

ratio between the volume of the air sample extracted from the channel and the sample air

volume analysed by the particle counter;

• time t for the latest clean air stability check, sampling time t , number of test periods

clean dust

The following test procedure for a single trial may be repeated with several cordless dry

vacuum cleaners of identical type. Then, the final result of the trial shall be averaged

arithmetically.

Proper dilution ratio needs to be verified. Prove that the air is not over-concentrated by serial

dilution, and prove that it is not over-diluted on the exhaust by lessening the dilution serially;

see 7.3.8.5.
5.11.6.101 Single particle counter procedure
A single trial proceeds as follows:

• Conditioning: dust is fed for 5 min while the particle concentration in the intake channel is

monitored (quantity of test dust in accordance with 5.11.3). Afterwards, the cordless dry

vacuum cleaner has to be fully re-charged or a replacement battery employed. For dry

as per 5.101.4)
cordless vacuum cleaners having a "90 % performance runtime" (t
90%rt

of less than 5 min, this procedure has to be repeated until an accumulated conditioning

running time of 5 min has been reached.

• Clean air stability check: the cordless dry vacuum cleaner is operated for a time t

clean

(minimum 2 min but no more than 10 min) without dust being fed until acceptable and

stable conditions are achieved. Stability is defined as follows:

– no more than ±10 % variation in particle counts observed over 100 counts during 30 s

measurement periods when evaluated for a minimum of 2 min; or
– fewer than 100 particle counts observed during 30 s measurement periods, when
evaluated for a minimum of 2 min.

The particle analysing system shall be allowed to flush for up to 15 s between the 30 s

measurement periods. If stability is not met within the minimum 2 min evaluation period,

and the "90 % performance runtime" (t as per 5.101.4) has been reached, the device

90%rt

shall be fully recharged, or a replacement battery employed to repeat the clean air

stability check.
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IEC 62885-4:2020 © I
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Questions, Comments and Discussion

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