ISO 14131:2005

INTERNATIONAL ISO
STANDARD 14131
First edition
2005-02-01
Agricultural sprayers — Boom
steadiness — Test methods
Pulvérisateurs agricoles — Stabilité des rampes — Méthodes d'essai

Reference number
©
ISO 2005
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ii © ISO 2005 – All rights reserved

Contents Page
Foreword. iv
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Test conditions. 3
5 Test methods and requirements . 3
Annex A (normative) Dimensional specifications of boom and suspension. 8
Annex B (informative) Example results for field or track tests — Curves of displacements related
to balance position . 9
Annex C (informative) Example results for track tests — Peak-to-peak amplitudes for oscillations. 10
Annex D (informative) Example results for field or track tests — Curves of displacements related
to balance position . 11
Bibliography . 13

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
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
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.
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 14131 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 6, Equipment for crop protection.
iv © ISO 2005 – All rights reserved

INTERNATIONAL STANDARD ISO 14131:2005(E)

Agricultural sprayers — Boom steadiness — Test methods
1 Scope
This International Standard specifies test methods for measuring boom steadiness in agricultural field crop
sprayers, with the objective of evaluating the stability of the boom and the quality of its suspension, and
determining its movements.
NOTE Safety methods for agricultural sprayers are specified in ISO 4254-6.
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 5008, Agricultural wheeled tractors and field machinery — Measurement of whole-body vibration of the
operator
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
boom centre
point located in the vertical plane of the boom and at the median of the segment joining the output of the
nozzles in this plane
See Figure 1.
Key
1 Y-axis
2 axis of end nozzle
3 segment joining output of nozzles
4 Z-axis
5 boom centre
Figure 1 — Defined locations on a boom
3.2
boom section end
distal point of each boom section
3.3
boom tip
distal point of the boom
3.4
reference axle
axle nearest the boom
NOTE In the case of a trailed sprayer, it is the axle of the sprayer.
3.5
vertical displacement
distance between the position at rest of a boom section end at moment t of the beginning of the test and its
position at the moment given, measured along the vertical axis, in a vertical plane perpendicular to the axis of
the boom
See Figure 2.
Key
X X-axis (in driving direction)
Y Y-axis (along boom)
Z Z-axis (in vertical plane)
1 origin (boom centre)
Figure 2 — Origin and direction references
3.6
horizontal displacement
distance between the position at rest of a boom section end, at moment t of the beginning of the test, and its
position at the moment given, measured along the horizontal axis, in a vertical plane perpendicular to the axis
of the boom
See Figure 2.
2 © ISO 2005 – All rights reserved

4 Test conditions
4.1 General
The sprayer should be operated according to good practice, and should be referenced in the manufacturer’s
manual unless it is the subject of the test.
4.2 Tyres
All characteristics of the tyres shall be recorded in the test report (see 5.5), including their inflation pressure.
4.3 Adjustment of boom
The boom shall be tested opened, with a height relative to the targets adjusted according to the specifications
of the nozzle under test: for 110°/120° nozzles it is usually 50 cm and for 80°/90° nozzles, 75 cm. Adjustments
specified in the manufacturer’s manual shall be used and specified in the test report.
4.4 Distance between wheels
Track width and wheel bases shall be specified in the report.
4.5 Dimensional specifications
The dimensional specifications for the sprayer, its boom and its suspension (see Annex A), at rest, shall be
determined and recorded in the test report.
5 Test methods and requirements
5.1 General
Three categories of test are specified, depending on excitation and measurement situation: field (5.2), track
(5.3) and simulator (5.4).
5.2 Tests on fields
5.2.1 General conditions
Good agricultural practices for spraying shall be respected.
Record the meteorological conditions, including wind speed and wind direction related to track direction (see
5.2.2), in the test report. The wind speed, measured at a height of 2 m, shall be not more than 5 m/s.
5.2.2 Track
In case of wind speed higher than 4 m/s, the track direction should be in the crosswind direction.
The sprayer under test shall be driven down the track three times.
The minimum length of the track shall be equivalent to at least 30 s of driving.
The minimum starting length to minimize the start-up effect of the boom movements shall be 1 m/ per 0,1 m/s
driving speed with a minimum of 20 m.
5.2.3 Driving speed
Unless speed variation is continuously monitored, the driving speed shall be constant during the test.
5.2.4 Motion measurement
5.2.4.1 General
The frequencies measured shall be at least between 0,1 Hz and 5 Hz.
The sample rate shall be a minimum of 10 Hz.
5.2.4.2 Displacement
If directly measured or obtained by proper integration/double integration of velocity/acceleration, then the
accuracy shall be minimum 0,1 cm per 1 m of boom length.
Measure both the vertical displacement and the horizontal displacement.
5.2.4.3 Velocity
If directly measured or obtained by integration of accelerations, then the accuracy shall be the same as that
obtained by derivation of displacement.
5.2.4.4 Acceleration
If directly measured, then the accuracy shall be the same as that obtained by double derivation of
displacement.
5.2.5 Procedure
5.2.5.1 Specific condition
Measure the travel speed.
5.2.5.2 Minimum requirements
Conduct any test at least five times (the u
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