prEN ISO 8224-1

SLOVENSKI STANDARD
01-oktober-2026
Potujoči namakalni stroji - 1. del: Obratovalne značilnosti ter laboratorijske in
terenske preskusne metode (ISO/DIS 8224-1:2026)
Traveller irrigation machines - Part 1: Operational characteristics and laboratory and field
test methods (ISO/DIS 8224-1:2026)
Mobile Beregnungsmaschinen - Teil 1: Betriebskennwerte und Prüfverfahren für Labor-
und Felduntersuchungen (ISO/DIS 8224-1:2026)
Machines d'irrigation mobiles - Partie 1: Caractéristiques de fonctionnement et méthodes
d'essai en laboratoire et au champ (ISO/DIS 8224-1:2026)
Ta slovenski standard je istoveten z: prEN ISO 8224-1
ICS:
65.060.35 Namakalna in drenažna Irrigation and drainage
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 8224-1
ISO/TC 23/SC 18
Traveller irrigation machines —
Secretariat: SII
Part 1:
Voting begins on:
Operational characteristics and 2026-08-04
laboratory and field test methods
Voting terminates on:
2026-10-27
Machines d'irrigation mobiles —
Partie 1: Caractéristiques de fonctionnement et méthodes d'essai
en laboratoire et au champ
ICS: 65.060.35
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 8224-1:2026(en)
DRAFT
ISO/DIS 8224-1:2026(en)
International
Standard
ISO/DIS 8224-1
ISO/TC 23/SC 18
Traveller irrigation machines —
Secretariat: SII
Part 1:
Voting begins on:
Operational characteristics and
laboratory and field test methods
Voting terminates on:
Machines d'irrigation mobiles —
Partie 1: Caractéristiques de fonctionnement et méthodes d'essai
en laboratoire et au champ
ICS: 65.060.35
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 8224-1:2026(en)
ii
ISO/DIS 8224-1:2026(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope (mandatory) . 1
2 Normative references (mandatory) . 1
3 Terms and definitions (mandatory) . . 1
4 Functional aspects and technical information . 7
5 Test specifications . . 7
5.1 General .7
5.2 Test liquid .7
5.2.1 General .7
5.2.2 Field uniformity tests .8
5.2.3 Laboratory uniformity and drive tests .8
5.3 Calculation of field resistance coefficient.8
5.4 Sampling and general preparation of test traveller irrigation machine .8
5.5 Specific machines .9
6 Laboratory uniformity tests . 9
6.1 General .9
6.1.1 Purpose .9
6.1.2 Preparation .9
6.1.3 Type tests .10
6.1.4 Basic tests .10
6.2 Test conditions .10
6.2.1 General .10
6.2.2 Combined test conditions .10
6.2.3 Emulated field resistance conditions .11
6.2.4 Machine supply water conditions. 12
6.2.5 Travel speed condition settings . 13
6.3 Apparatus . 13
6.3.1 Measurement devices . 13
6.3.2 Test bench . 13
6.4 Required pre-test data . 15
6.4.1 Water distribution patterns from stationary water distribution systems . 15
6.4.2 Flow rate through water distribution system as a function of pressure .16
6.4.3 Head loss in distribution hose as a function of length laid down .16
6.5 Procedure .16
6.5.1 Installation .16
6.5.2 Test parameters .17
6.5.3 Preparation of machine for testing .18
6.5.4 Preparation of test bench for testing .18
6.5.5 Test procedure.18
6.6 Processing laboratory uniformity test data .18
6.7 Presentation of results .21
6.7.1 General .21
6.7.2 Tables .21
6.7.3 Maps . 22
6.7.4 Graphs . 23
6.7.5 Test report . 25
7 Laboratory drive tests .25
7.1 General . 25
7.2 Laboratory drive test equipment . 25
7.3 Laboratory drive test conditions . 26
7.4 Laboratory drive test procedure . 26

iii
ISO/DIS 8224-1:2026(en)
7.5 Laboratory drive test results .27
8 Field uniformity tests .28
8.1 General . 28
8.2 Apparatus . 28
8.3 Field uniformity test procedure . 29
8.3.1 Field uniformity test parameters . 29
8.3.2 Placement of collectors in test field . 29
8.3.3 Preparing and conducting field uniformity tests.31
8.4 Field uniformity test data processing and results .31
8.4.1 Depths of water application .31
8.4.2 Transverse uniformity of water application.32
8.4.3 Longitudinal uniformity . 34
8.5 Graphs of field uniformity test results . 35
8.5.1 Transverse uniformity . 35
8.5.2 Transverse uniformity . 35
8.6 Test report . 35

iv
ISO/DIS 8224-1:2026(en)
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 technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
This third edition of ISO 8824-1 cancels and replaces the second edition (ISO 8824-1:2003), which has been
technically revised.
The main changes are as follows:
— the test length has been redefined to four characteristic sections;
— the test conditions have been clarified;
— the calculation method of travel speed error has been added;
— Table 3 Collector spacing has been added;
— the former Figure 5 about test bench configuration has been divided into two figures: Figure 5 for
uniformity and Figure 8 for drive and resistance force;
— the mandatory clauses Normative references (Clause 2) and Terms and definitions (Clause 3) have been
modified, and subsequent clauses have been renumbered.
A list of all parts in the ISO 8824 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

v
ISO/DIS 8224-1:2026(en)
Introduction
The operational characteristics and laboratory and field test methods of traveller irrigation machines are
becoming increasingly important, especially for the following reasons:
— to ensure irrigation efficiency and rational use of water resources, avoiding water waste or unsatisfactory
irrigation performance due to poor operational behaviour, and
— to comprehensively evaluate the operational characteristics of the irrigation machine under different
working conditions through laboratory and field tests, ensuring its stability and adaptability, and
providing a uniformly comparable test basis for product development validation, factory quality control
and performance evaluation.
Moreover, the relevant industries need guidance in carrying out performance testing and quality control of
traveller irrigation machines so that the state of the art and a basis for future specifications can be evaluated.
The ISO 8224 series specifies test methods related to the operational characteristics and laboratory and field
tests of traveller irrigation machines, offering the user the means to evaluate the combined performance of
their operational characteristics and laboratory and field test methods.
This document not only provides a means for testing and evaluating the operational characteristics of
traveller irrigation machines, but also provides the means for obtaining detailed laboratory and field test
results that can be used for their subsequent improvement.

vi
DRAFT International Standard ISO/DIS 8224-1:2026(en)
Traveller irrigation machines —
Part 1:
Operational characteristics and laboratory and field test
methods
1 Scope (mandatory)
This part of ISO 8224 specifies the operational characteristics of, and laboratory and field test methods for,
traveller irrigation machines. It includes
— user-oriented technical information for inclusion in the manufacturer's accompanying product literature,
— laboratory test procedures for evaluating the uniformity of water application on an irrigated strip by a
machine operating within a specified range of conditions and for determining the maximum travelling
rates the drive mechanism is able to achieve in response to specified operating conditions, and
— field test procedures for determining the uniformity of water application on a given irrigated strip under
local conditions prevailing in the field at time of testing.
It is applicable only to traveller irrigation machines and not to other types of irrigation machine such as
centre-pivot and moving lateral irrigation machines.
2 Normative references (mandatory)
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.
ISO 15886-3, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of distribution and
test methods
ISO 8026, Agricultural irrigation equipment — Sprayers — General requirements and test methods
3 Terms and definitions (mandatory)
For the purposes of this document, the following terms, definitions and symbols(see Table 1) apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
traveller irrigation machine
machine designed to irrigate a field sequentially, strip by strip, using an emission device (or devices) that
move across the field while operating and having a hose for moving water from a distribution point to the
emission devices
Note 1 to entry: There are three types of traveller irrigation machines, each having a structure that includes a reel,
drum or winch, and a travelling water distribution system.

ISO/DIS 8224-1:2026(en)
3.2
reel machine
type 1 traveller irrigation machine with a stationary reel coiling a distribution hose that drags a travelling
cart on which a water distribution system (most often a gun-type sprinkler) is installed and carries water to
the water distribution system
Note 1 to entry: See Figure 1.
Key
1 water source
2 stationary reel
3 source connection hose
4 stabilizer legs
5 distribution hose — dragged
6 cart or trolley
7 water distribution device or system
8 direction of movement
Figure 1 — Sketch of operating type 1 traveller irrigation machine — Reel machine
3.3
traveller
type 2 traveller irrigation machine with a travelling water distribution system that drags the distribution
hose with no need to coil it
Note 1 to entry: See Figure 2.

ISO/DIS 8224-1:2026(en)
Key
1 tow cable anchor
2 tow cable
3 cart or trolley
4 water distribution device or system
5 water source
6 distribution hose — dragged
7 direction of movement
Figure 2 — Sketch of operating type 2 traveller irrigation machine — Traveller
3.4
self-propelled reel machine
type 3 traveller irrigation machine with a stationary distribution hose that carries irrigation water to a
travelling structure accommodating a reel on which the distribution hose is coiled, a drive train, self-
propelled wheels and water distribution system
Note 1 to entry: See Figure 3.
Key
1 water source
2 distribution hose
3 self-propelled structure
4 water distribution device or system
5 direction of movement
Figure 3 — Sketch of operating type 3 traveller irrigation machine —Self-propelled reel machine

ISO/DIS 8224-1:2026(en)
3.5
water distribution system
sprinkling and travelling part of a traveller irrigation machine through which irrigation water is distributed
and applied over a strip
EXAMPLE Sprinkler, gun-type sprinkler, combination of sprinklers and gun-type sprinklers, boom with set of
sprinklers or sprayers
3.6
field resistance coefficient
a
coefficient characterizing the resistance drag force exerted by the field on a traveller irrigation machine
while travelling along a strip
3.7
distribution hose
flexible supply line that conveys irrigation water from the stationary reel to the travelling water distribution
system of a traveller irrigation machine
3.8
source connection hose
source connection conduit
flexible supply conduit used to connect an irrigation water source to the stationary structure of a traveller
irrigation machine
3.9
irrigation strip
lane
portion of a field irrigated sequentially by a traveller irrigation machine
3.10
irrigation strip width
lane width
strip spacing
distance between two adjacent travel paths of a cart
3.11
travel path
path within a strip where the water distribution system moves during its irrigation travel
3.12
length of travel
distance a traveller irrigation machine moves along its travel path within a strip
3.13
reel
component of a traveller irrigation machine, consisting of a drum with flanges, rotating on an axial shaft and
intended for coiling the part of the distribution pipe
Note 1 to entry: See Figure 4.

ISO/DIS 8224-1:2026(en)
Key
A structure
B distribution hose
C cart or trolley
C current cart or trolley position
C most distant cart or trolley position
d reel drum diameter
Φ distribution hose outer diameter
L distribution hose reference length
ref
L current length of moving portion of distribution hose laid down and dragged on field
1 reel drum
2 shaft of reel
3 brakes of reel
4 control device for water distribution system travel
5 machine-source connection hose (supply hose)
6 reel support — fixed or orientable turntable
7 wheel
8 chassis
9 external power shaft
10 stabilizer legs
11 distribution hose guide mechanism
12 cart (or trolley) lifting device
13 drive and drive train
14 distribution hose (usually polyethylene tube)
15 cart skid
16 water distribution system
17 cart wheel
Figure 4 — Type 1 traveller irrigation machine (reel machine) — Main parts

ISO/DIS 8224-1:2026(en)
3.14
coefficient of variation
C
v
ratio of the standard deviation to the mean of a variable that is repeatedly measured
3.15
reel coiling speed
n
r
angular velocity of the reel during coiling
3.16
characteristic section
portion of the irrigated strip, along the travel path, where the water distribution is representative of the
steady operating conditions of a traveller irrigation machine
Note 1 to entry: In laboratory and field tests, four characteristic sections are usually selected along the travel path to
evaluate the uniformity of water application.

Table 1 — Symbols
Symbol Description Unit
d Reel drum diameter m
E Irrigation strip width, also called strip spacing m
F Field resistance force N
F Actual resistance force applied using the bench N
bench
F Desired resistance force N
ref
Mean application depth at line i collected while the water distribution system travels
h mm
Ai
a segment equal to the wetted radius
h Mean application depth averaged over the strip mm
As
h Gross application depth mm
GA
h Gross application depth over a segment mm
GAseg
I Reference application rate for line i mm/h
i
I Reference application rate for the strip mm/h
s
L Current length of moving portion of distribution hose pulled on field m
L Length of the distribution hose m
ref
L Length of the strip m
s
L Travel distance of the water distribution system m
travel
P Weight per unit length of the distribution hose when full of water N/m
P Total weight of the traveller irrigation machine when full of water N
Tolal
q Test flow rate m /h
R Wetted radius m
wet
s Spacing between collectors on a line m
T Duration time for irrigation h
v Travel speed of the water distribution system m/h
Travel speed of the water distribution system at line i, computed as the mean travel m/h
v
i
speed over a segment equal to the wetted radius
v Travel speed of the water distribution system computed as the mean travel speed m/h
s
over the strip
a Field resistance coefficient (dimensionless)

ISO/DIS 8224-1:2026(en)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Symbol Description Unit
∆L Segment length (travel distance across a segment) m
seg
∆V Volume of water distributed over a segment m
seg
Φ Distribution hose diameter mm
4 Functional aspects and technical information
The recommended range of operation and other functional aspects relevant for the users of the traveller
irrigation machine shall be specified and included in the documentation accompanying the traveller
irrigation machine. These shall include at least the following specifications:
a) recommended minimum and maximum working pressures at the machine inlet connection;
b) recommended minimum and maximum flow rates;
c) distribution characteristics of the recommended water distribution system or systems;
d) length, pressure, diameter and wall thickness of the distribution hose;
e) recommended maximum road towing speed;
f) recommended maximum terrain slope when operating;
g) recommended maximum external power shaft speed, if applicable;
h) safety instructions;
i) operating instructions;
j) the total weight of the moving portion of traveller irrigation machine full of water;
k) recommended maximum and minimum travel speed declared by the manufacturer.
5 Test specifications
5.1 General
The tests include
— laboratory uniformity tests (see Clause 6),
— laboratory drive tests (see Clause 7), and
— field uniformity tests (see Clause 8).
Conduct the tests in accordance with the following specifications for test liquids and machine sampling and
preparation.
5.2 Test liquid
5.2.1 General
Traveller irrigation machines are intended to operate with unfiltered or coarsely filtered irrigation water
that may occasionally or continuously carry clogging materials of various types, sizes and concentrations.
Consequently, traveller irrigation machine hydraulic control lines or hydraulic drive circuits are often
equipped with filters or centrifugal separators.

ISO/DIS 8224-1:2026(en)
5.2.2 Field uniformity tests
For field uniformity tests, the standard test liquid shall be the irrigation water available on the test field.
This water shall not be modified for the purpose of the test by filtration, chemical injection, or any other
treatment, unless such modification is specifically requested by the client.
5.2.3 Laboratory uniformity and drive tests
For the standard test liquid in laboratory uniformity tests and laboratory drive tests, use irrigation water
at a temperature between 4 °C and 35 °C, in which the concentration of clogging materials is not more than
100 mg/l and which has passed through
— a 5 mm aperture screen, if the water distribution device is a gun-type sprinkler, or
— a 500 µm aperture screen, if the water distribution device is not a gun-type sprinkler.
Optionally, upon client request, after running the traveller irrigation machine reference tests with
the standard test liquid, the tests may be run again with water having an increased range of sizes or
concentrations, or both, of clogging materials, or with other liquids together with extended information on
the traveller irrigation machine's performance.
5.3 Calculation of field resistance coefficient
Calculate the value of the coefficient, α, characterizing the resistance drag force exerted by a traveller
irrigation machine on the field when the water distribution system travels along a strip, as follows.
— For types 1 and 2 traveller irrigation machines: as the ratio between the field resistance force and the
weight of the part of the distribution hose lying on the field and being dragged at that time, using the
equation
F
  (1)
PL
where
α is the field resistance coefficient (dimensionless);
F is the field resistance force, in newtons;
P is the weight per unit length of the distribution hose full of water, in newtons per metre;
L is the length of that part of the distribution hose lying on the field and dragged, in metres.
— For type 3 traveller irrigation machines: as the ratio between the field resistance force and the weight of
the machine inclusive of the coiled part of the tube, using the equation
F
  (2)
PPL 

 Total 
where
α is the field resistance coefficient (dimensionless);
F is the field resistance force, in newtons;
P is the weight per unit length of the distribution hose full of water, in newtons per metre;
L is the length of that part of the distribution tube or distribution hose lying on the field, in
metres;
P is the total weight of the traveller irrigation machine full of water, in newtons.
Total
5.4 Sampling and general preparation of test traveller irrigation machine
a) Select the sample traveller irrigation machine to be tested from a series of products representative
of the model, unmodified for the purpose of the tests. Select water distribution system components

ISO/DIS 8224-1:2026(en)
(e.g. nozzles) in accordance with the manufacturer's operating instructions and to meet pressure test
conditions.
b) Ensure that the traveller irrigation machine supplied for test purposes and the accompanying technical
and operating documentation are the same as delivered by the manufacturer to users.
c) Visually check the traveller irrigation machine to be tested for conformity with the data provided by the
manufacturer in the manufacturer's literature and report any deviations from those data.
d) Describe the necessary actions for making the settings for the traveller irrigation machine.
e) Test the traveller irrigation machine in accordance with the manufacturer's operating instructions.
5.5 Specific machines
A specific traveller irrigation machine, submitted for evaluation for field or laboratory uniformity of water
application or drive performance, may be selected by the client.
6 Laboratory uniformity tests
6.1 General
6.1.1 Purpose
These tests of the uniformity of water application reproduce, in the laboratory, the typical operation of a
traveller irrigation machine of a given type and water distribution system along the four characteristic
sections length of travel of the distribution system for a number of specific standardized conditions covering
the machine's range of operation.
NOTE Four characteristic sections are defined as (see Figure 6):
— The 1st section (no superposition section) is the first phase of operation with no superposition of the spraying
water quantity.
— The 2nd section (full superposition section) with constant speed is the travel process of full superposition of the
spraying water quantity with constant speed.
— The 3rd section (full superposition section) with variable speed is the travel process of full superposition of the
spraying water quantity with variable speed affected by coiled layers variation.
— The 4th section (semi-superposition section) is the last moment of operation with the semi-superposition of the
spraying water quantity.
They enable monitoring of all performance parameters, including hydraulic and power conditions and travel
of the water distribution system along the strip, and the determination of the reference traveller irrigation
machine's water distribution performance by characterizing its water application pattern under 2 m/s wind
conditions along the entire strip.
6.1.2 Preparation
Prior to the test, select the appropriate water application test data for the installed water distribution
system in accordance with International Standards for these water distribution systems (see ISO 15886-3
and ISO 8026), under 2 m/s wind conditions.
Select the test strip dimensions, i.e. length, L , and width, E, of the test strip, as follows.
s
a) Select L for the test, cover four characteristics of test sections, as shown in Figure 6.
s
b) Select the experimental width in accordance with the manufacturer's operating instructions. It can be
equal to E, but due to symmetry, E/2 can be used, as shown in Figure 6.

ISO/DIS 8224-1:2026(en)
6.1.3 Type tests
The type tests are performed under a set of 11 laboratory test conditions covering the range of operating
conditions and settings declared by the manufacturer (see 6.2.2 and Table 2). Consequently, the test report
and conclusions shall reflect that the traveller irrigation machine was tested for uniformity of water
distribution in the laboratory in accordance with this set of 11 laboratory uniformity test conditions.
6.1.4 Basic tests
The basic tests are used to estimate, on a preliminary basis, the water distribution performance that would
be determined by the full set of type tests. The test conditions to be satisfied in the basic tests shall consist
of test conditions 2, 6 and 10 (see Table 2) and one other test condition to be selected by the manufacturer
from the set of 11 test conditions.
The test report and conclusions shall reflect that the traveller irrigation machine was tested for uniformity
of water distribution in the laboratory — not for the entire set of 11 test conditions, but only for a limited
number of selected conditions: test conditions 2, 6, 10 and the other, selected, test condition.
6.2 Test conditions
6.2.1 General
This test is performed on a standard and fully operational traveller irrigation machine (unless specified
otherwise by a client), ready for use in the field and including all of its operative parts and accessories. The
laboratory test conditions reflect three different types of operating conditions:
— field resistance conditions,
— machine supply water conditions, and
— conditions for setting directly or indirectly travelling speed for the water distribution system.
6.2.2 Combined test conditions
The 11 laboratory uniformity test conditions shall cover at least part of the machine operating range
recommended by the manufacturer for field resistance (see 6.2.3), machine supply water pressure (see
6.2.4) and travel speed (see 6.2.5). They are as follows:
a) one test condition (the reference condition, or test condition 1) in the middle of the operating range for
travel speed, field resistance and machine supply water pressure with a medium travel speed setting, a
medium low field resistance coefficient and a medium supply water test pressure setting;
b) nine test conditions (test conditions 2 to 10) with three travel speed settings, a medium-high field
resistance coefficient, three machine supply water test pressures and three travelling rate settings;
c) one test condition (test condition 11) with a low travel speed setting, a medium-low field resistance
coefficient and a high machine supply water test pressure.
These test conditions presented in Table 2 are applicable to types 1 and 2 traveller irrigation machines
with gun-type water distribution systems. For other type irrigation machine and other water distribution
systems, we can set the test conditions like Table 2.

ISO/DIS 8224-1:2026(en)
Table 2 — Type test conditions for types 1 and 2 machines (with gun-type water distribution
systems)
Condition Machine travel speed setting Field resistance coefficient Pressure to machine inlet
No. m/h a MPa
1 30 (medium) 0,5 (medium-low) 0,8 (medium)
2 (basic) 10 (low)
a
3 30 (medium) 1,0 (high)
a
4 50 (high)
5 10 (low)
6 (basic) 30 (medium) 0,8 (medium-high) 0,8 (medium)
a
7 50 (high)
8 10 (low)
9 30 (medium) 0,6 (low)
a
10 (basic) 50 (high)
a
11 10 (low) 0,5 (medium-low) 1,0 (high)
NOTE  If the maximum recommended value is lower, use the maximum recommended value.
6.2.3 Emulated field resistance conditions
The laboratory uniformity tests shall be conducted under the following assumptions.
a) The simulated field is flat and level, so that the nozzle or nozzles of the water distribution system can
be assumed to remain at the same elevation over L , with a slope tolerance of ±2 % along the travel
travel
path.
b) The field resistance force that the operating traveller irrigation machine must overcome meets the
following specific requirements for each type of traveller irrigation machine:
1) for type 1 (reel machines), the field resistance force shall be proportional to the length of
distribution hose laid down on the strip between the cart and the reel, to the weight of a unit length
of the distribution hose full of water and to α;
2) for type 2 (travellers), the field resistance force shall be proportional to the length of the distribution
hose laid down on the strip between the cart and the remote bend of the distribution hose, to the
weight of a unit length of
...