ISO/TS 19713-2:2010

TECHNICAL ISO/TS
SPECIFICATION 19713-2
First edition
2010-07-15
Road vehicles — Inlet air cleaning
equipment for internal combustion
engines and compressors —
Part 2:
Fractional efficiency testing with coarse
particles (5 µm to 40 µm optical diameter)
Véhicules routiers — Équipement d'épuration d'air d'entrée pour
moteurs à combustion interne et compresseurs —
Partie 2: Contrôle d'efficacité fractionnelle avec grosses particules
(diamètre optique de 5 µm à 40 µm)

Reference number
©
ISO 2010
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ii © ISO 2010 – All rights reserved

Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Test equipment, accuracy and validation.4
4.1 Measurement accuracy.4
4.2 Test stand configuration.5
4.3 Test conditions .12
4.4 Validation.13
4.5 Reference air cleaner assemblies/air filter elements.14
4.6 Routine operating procedure .14
5 Fractional efficiency test .14
5.1 General .14
5.2 Test procedure.15
Annex A (informative) Test report .17
Annex B (normative) Efficiency data reduction.19
Annex C (normative) Pressure loss data reduction .26
Annex D (informative) Determination of maximum efficiency aerosol concentration.27
Annex E (normative) Accuracy requirements, validation and routine operation.28
Annex F (informative) Particle diameters .31
Annex G (normative) Aerosol isokinetic sampling.33
Annex H (normative) Fractional efficiency.36
Bibliography.37

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of document:
⎯ an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
⎯ an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an
International Standard or be withdrawn.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 19713-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 7,
Injection equipment and filters for use on road vehicles.
ISO/TS 19713 consists of the following parts, under the general title Road vehicles — Inlet air cleaning
equipment for internal combustion engines and compressors:
⎯ Part 1: Fractional efficiency testing with fine particles (0,3 µm to 5 µm optical diameter)
⎯ Part 2: Fractional efficiency testing with coarse particles (5 µm to 40 µm optical diameter)
iv © ISO 2010 – All rights reserved

Introduction
The engine air cleaner/filter fractional efficiency test methods described in this part of ISO/TS 19713 have
been developed to cover traditional and new particulate air filters in order to remove airborne contaminants
specifically to protect the engine.
Air cleaner fractional efficiency is one of the main air cleaner performance characteristics. This part of
ISO/TS 19713 has been established to address the measurement of this parameter. The objective of the
procedure is to maintain a uniform test method for evaluating fractional efficiency of air cleaners and air filters
on specified laboratory test stands.
The data collected in accordance with this part of ISO/TS 19713 can be used to establish fractional efficiency
characteristics for air cleaners and filters tested in this manner. The actual field operating conditions (including
contaminants, humidity, temperature, mechanical vibration, flow pulsation, etc.) are difficult to duplicate.
However, with the procedure and equipment set forth, comparison of air filter fractional efficiency can be made
with a high degree of confidence.

TECHNICAL SPECIFICATION ISO/TS 19713-2:2010(E)

Road vehicles — Inlet air cleaning equipment for internal
combustion engines and compressors —
Part 2:
Fractional efficiency testing with coarse particles (5 µm to
40 µm optical diameter)
1 Scope
This part of ISO/TS 19713 describes laboratory test methods to measure engine air cleaner and filter
performance by fractional efficiency tests for particles from 5 µm to 40 µm, using ISO 12103-1 test dusts.
Performance includes, but is not limited to, airflow restriction or pressure loss, initial and incremental fractional
efficiencies during dust loading.
ISO/TS 19713-1 describes fractional efficiency tests for particles from 0,3 µm to 5 µm optical diameter.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 5011:2000, Inlet air cleaning equipment for internal combustion engines and compressors —
Performance testing
ISO 12103-1, Road vehicles — Test dust for filter evaluation — Part 1: Arizona test dust
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
air cleaner assembly
assembly which includes the air cleaner housing and the air filter element
3.1.1
single-stage air cleaner
air cleaner which does not incorporate a separate pre-cleaner
3.1.2
multistage air cleaner
air cleaner consisting of two or more stages, the first usually being a pre-cleaner, followed by one or more
filter elements
NOTE If two elements are used, the first is called the primary element and the second is called the secondary element.
3.1.3
pre-cleaner
device usually using inertial or centrifugal means to remove a portion of the test dust before reaching the filter
element
3.2
air filter element
actual filter supported and sealed within the air cleaner assembly
3.3
test airflow rate
measure of the volume of air passing through the test duct per unit time
NOTE The test airflow rate is expressed in cubic metres per second.
3.4
pressure loss
permanent pressure reduction due to a decrease in the flow energy (velocity head) caused by the filter (Pa at
standard conditions of 20 °C and 101,3 kPa)
3.5
fractional efficiency
E
f,i
ability of the air filter to remove particles of a specified size expressed as a percentage for particle size i
−
CC
1,ii2,
=×100 (1)
E
f,i
C
1,i
where
C is the number of particles per unit volume of specified size, i, upstream;
1,i
C is the number of particles per unit volume of specified size, i, downstream
2,i
NOTE Fractional efficiency is expressed in percent.
3.6
fractional efficiency before dust loading
efficiency before the collected particles have any measurable effect on the efficiency of the filter under test
NOTE The collected particles can affect the measured filter efficiency before enough aerosol is collected to have any
measurable effect on the filter pressure loss.
3.7
incremental fractional efficiency
efficiency, determined at the specified flow rate as a function of particle size at 10 %, 25 %, 50 % and 100 %
of filter life, which is determined by pressure loss across the filter as the filter is loaded with ISO 12103-1 test
dust
NOTE 1 The values of filter pressure loss, ∆P , at which the incremental fractional efficiencies are measured can be
i
calculated from
∆=P ∆PL+∆()∆P−∆P (2)
iiodo
where
∆P is the initial pressure loss;
o
2 © ISO 2010 – All rights reserved

∆L is the fraction of filter life;
i
∆P is the specified terminal pressure loss.
d
NOTE 2 If necessary, the requester and the tester can agree upon different criteria for incremental fractional efficiency.
3.8
fractional penetration
P
f,i
ratio of the concentration of particles of specified size exiting the filter to the concentration of particles of
specified size entering the filter expressed in a percentage for particle size i
PE=−100 (3)
f,iif,
NOTE Fractional penetration is expressed in percent.
3.9
test dust loading
mass of test dust collected by the air cleaner assembly or air filter element at a specified flow rate expressed
in grams
3.10
particle measurement device
aerosol spectrometer
instrument for sizing, or counting, or sizing and counting, aerosol particles
NOTE Recommended particle counters are optical particle counters (OPC) or other counters demonstrating good
correlation in measuring particle sizes, e.g. aerodynamic particle counters (APC).
3.11
test aerosol
particles suspended in air, used for filter efficiency evaluation or dust loading
3.11.1
fractional efficiency test aerosol
aerosol used t
...