ISO/TR 15155:2005

Test facilities for agricultural irrigation equipment

ISO/TR 15155:2005 is intended to provide guidance on the design, selection, installation and use of the equipment required to establish basic test facilities for irrigation equipment evaluation. Its purpose is to provide information sufficient to complement the detailed procedures included in ISO 9261, ISO 15886, ISO 7714, ISO 9635, ISO 9644, ISO 9911, ISO 9952 and ISO 10522 for the testing of agricultural irrigation system components, specifically: emitters, sprinklers and valves.

Installations d'essais pour le matériel agricole d'irrigation

General Information

• Status: Withdrawn
• Publication Date: 10-May-2005
• Withdrawal Date: 10-May-2005
• ICS: 65.060.35 - Irrigation and drainage equipment
• Technical Committee: ISO/TC 23/SC 18 - Irrigation and drainage equipment and systems
• Drafting Committee: ISO/TC 23/SC 18/WG 4 - Laboratory test equipment for irrigation purposes
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 20-Aug-2018

Relations

• Revised: ISO/TR 15155-1:2018 - Agricultural irrigation equipment — Test facilities for agricultural irrigation equipment — Part 1: General
• Effective Date: 24-Dec-2011

Standards Content (Sample)

TECHNICAL ISO/TR
REPORT 15155
First edition
2005-05-01

Test facilities for agricultural irrigation
equipment
Installations d'essais pour le matériel agricole d'irrigation




Reference number
ISO/TR 15155:2005(E)
©
ISO 2005

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ISO/TR 15155:2005(E)
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ISO/TR 15155:2005(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 System components. 2
5 Test facility procedures and policies. 6
Annex A (informative) Sprinkler hydraulic properties in clear water. 10
Annex B (informative) Drip emitters and emitting pipe hydraulic properties in clear water . 12
Annex C (informative) Valves hydraulic properties in clear water . 14

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ISO/TR 15155:2005(E)
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.
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 exceptional circumstances, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard (“state of the art”, for example), it may decide by a
simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely
informative in nature and does not have to be reviewed until the data it provides are considered to be no
longer valid or useful.
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/TR 15155 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.

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TECHNICAL REPORT ISO/TR 15155:2005(E)

Test facilities for agricultural irrigation equipment
1 Scope
This Technical Report is intended to provide guidance on the design, selection, installation and use of the
equipment required to establish basic test facilities for irrigation equipment evaluation. Its purpose is to
provide information sufficient to complement the detailed procedures included in ISO 9261, ISO 15886,
ISO 7714, ISO 9635, ISO 9644, ISO 9911, ISO 9952 and ISO 10522 for the testing of agricultural irrigation
system components, specifically: emitters, sprinklers and valves.
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 15886-1, Agricultural irrigation equipment — Sprinklers — Part 1: Definition of terms and classification
ISO 15886-3, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of distribution and test
methods
ISO 9261, Agricultural irrigation equipment — Emitters and emitting pipe — Specification and test methods
ISO 7714, Agricultural irrigation equipment — Volumetric valves — General requirements and test methods
1)
ISO 9635, Irrigation equipment — Hydraulically operated irrigation valves
ISO 9644, Agricultural irrigation equipment — Pressure losses in irrigation valves — Test method
ISO 9911, Agricultural irrigation equipment — Manually operated small plastics valves
ISO 10522, Agricultural irrigation equipment — Direct-acting pressure-regulating valves
ISO/IEC 17025:1999, General requirements for the competence of testing and calibration laboratories
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
test bench
collection of components, including water supply/receiving reservoir, piping, fittings and instrumentation,
assembled to test an agricultural irrigation component

1) Under revision.
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ISO/TR 15155:2005(E)
3.2
test facility
collection of components, including water supply, test bench(es) and shelter, used to test agricultural irrigation
valves, sprinklers and emitters
3.3
net positive suction head available
arithmetic difference between the available total suction head at the impeller of a centrifugal pump and the
vapour pressure head
3.4
net positive suction head required
arithmetic difference between the total suction head at the impeller of a centrifugal pump required for the
pump to operate properly and the vapour pressure head, as specified by the manufacturer
3.5
static pressure head
sum of the head associated with atmospheric pressure and the gauge pressure head measured approaching
the inlet of the impeller of a centrifugal pump
3.6
total suction head at the impeller of a centrifugal pump
sum of the static pressure head and the velocity head measured approaching the inlet of the impeller of a
centrifugal pump and corrected to the centreline of the impeller for a centrifugal pump mounted horizontally or
to the datum of the tip of the inlet vanes for a centrifugal pump mounted vertically
3.7
vapour pressure head
head associated with the absolute pressure at which a liquid vaporizes, as determined by the physical
properties of the liquid and its temperature
4 System components
4.1 Pumps and pump environment
For specific requirements prior to selecting a pump, see Annex A for sprinklers, Annex B for emitters and
emitting pipe, and Annex C for valves.
4.1.1 Selection
The size and type of pump selected depend on the requirements of the equipment to be tested. More than
one pump may be required depending on the range of flows and pressures required by the equipment to be
tested. Identify the equipment, test flow range and test pressure range before selecting a pump.
Select a centrifugal pump or a turbine pump based on the desired configuration of the test bench.
Ensure that the pumps and controls selected provide the required hydraulic characteristics continuously and
without vibration that could affect the measurement accuracy. Dampen turbulence or use flow-straightening
vanes in critical locations such as the inlet to a sprinkler test riser. Employ a variable-frequency drive (VFD) to
control the motor, allowing the pump to operate over a wider range of flows and pressures.
Control the flow using equipment installed on the test bench (nozzle, emitters, valve, regulator and pipe size)
and/or by the speed at which the pump is operated. Control flow and/or pressure with regulating valves on the
inlet or outlet pipe, as needed.
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ISO/TR 15155:2005(E)
Ensure that the pump is able to provide at least 110 % of the maximum pressure at 110 % of the maximum
flow rate required for the device being tested. Review the pump curve for the selected pump to ensure it will
operate over the required range.
4.1.2 Installation
Ensure that the pump is installed in a configuration that does not require priming and that the water
supply/receiving tank has sufficient volume so that water temperature change during a test does not exceed
the testing criteria.
Filtration is required to maintain the quality of the water supply and to meet the requirements of the equipment
to be tested. If no specific filtration standard is required, the equivalent of a 200 mesh (75 microns) filter is
recommended. Provide a by-pass circuit to effectively increase the operating range of the test bench.
See Figures 1, 2 and 3 for typical test bench configurations for testing valves, sprinklers and emitters.
4.1.3 Use
Ensure that proper safety equipment is installed and that operational procedures are documented. Refer to
local codes to ensure that installation and use meet safety standards.
4.2 Pressure measurement
Measure pressure using a manometer filled with mercury or another calibrated liquid; manually read gauges
or recording transducers with an analog or digital display or recorded directly using a data-logger. Ensure that
the pressure range is higher than the expected pressures to prevent over-ranging of the gauge. See Annexes
A, B and C for specifications.
4.2.1 Selection
The size and type of gauges required depend on the requirements of the equipment to be tested. More than
one gauge may be required, depending on the range of pressures dictated by the equipment to be tested.
Select a gauge that operates in the middle of its operating range for the test procedure and which is large
enough to be easily read with increments as required by the accuracy indicated in the test procedure. A
100 mm dial face and a minimum accuracy of ± 0,5 % of reading are recommended unless otherwise
specified in the relative test procedure of the International Standard being used (see Clause 1 for mention of
the relevant published standards). An electronic pressure transmitter can be used over a wide range of
pressures.
2)
Figure 4 illustrates eight consecutive pressure gauges for the range of 0 to 4 MPa (0 to 40 bar) , where the
grey area defines the range of the pressure with accuracy higher than ± 0,5 %.
4.2.2 Installation and location of sensors
Provide pressure taps at varying locations as required by the equipment being tested. Figure 5 shows
information for design and installation of pressure taps. Locate gauges away from areas of excessive
vibration.
It is preferable to have pressure measurements made at the same elevation as the pressure tap and at the
exact location at which the pressure information is required, in order to eliminate mathematical calculations
and approximations. If this is not physically possible, make a correction for the elevation difference. A
correction is also required if differential pressure measurements are made in pipes of a different size.

5 2
2) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm
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ISO/TR 15155:2005(E)
4.2.3 Calibration and certification
Ensure that pressure taps are designed to allow easy access for pressure gauge inspection and maintenance.
A regular calibration schedule is required to ensure the continuing reliability of the readings. Give each gauge
an identification number and maintain a calibration log. Use commercial dead weight testers to calibrate
gauges. In general, check calibration before and after a specific test program. Inspection frequency and
operation should comply with ISO/IEC 17025.
4.3 Flow and volume measurement
Measure actual flow rate and accumulated volume using calibrated flow meters or by recording the duration of
the flow and the mass or volume of the water or other liquid and then calculating the flow rate and total flow.
Electromagnetic-type flow meters are considered the most accurate type of flow meter.
4.3.1 Flow meter alternatives and selection
There are several types of flow meters that are classified according to the operating principle. Turbine,
impeller, magnetic, and positive displacement types depend on a sensor installed in the piping system.
Differential-pressure types depend on orifice plates in the piping system. Install the meters or sensors as
specified by the manufacturer.
Select a set of flow meters that give the required accuracy over the range of flow rates of the devices to be
tested. The volumetric method may be used for devices with low flow rates such as nozzles and emitters and
a flow meter for higher-flow devices. Select a meter that is durable and maintains calibration.
4.3.2 Volumetric (time and mass/volume)
Time and mass or time and volume can be used to determine flow rate and volume over the selected time
period. The time and mass method is easier to automate. Although this method is more difficult to design into
a test bench, the need for periodic calibration is greatly reduced. Calibration of the mass or volume scale is
required less frequently (annually) than calibration of a flow meter and is a simpler procedure. Once the
receiving tank has been calibrated, there should be no need to re-calibrate unless the tank is relocated or
damaged. This method may not be practical for measuring total volume of devices requiring high flow rates
unless a large receiving tank is constructed.
4.3.
...