ISO 21622-2:2023
(Main)Irrigation techniques — Remote monitoring and control for irrigation — Part 2: Tests
Irrigation techniques — Remote monitoring and control for irrigation — Part 2: Tests
This document specifies the tests necessary to assess the functionality and robustness of remote units used in irrigation remote control systems.
Techniques d’irrigation — Surveillance et commande à distance pour l’irrigation — Partie 2: Essais
General Information
Buy Standard
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 21622-2
First edition
2023-07
Irrigation techniques — Remote
monitoring and control for
irrigation —
Part 2:
Tests
Techniques d’irrigation — Surveillance et commande à distance pour
l’irrigation —
Partie 2: Essais
Reference number
ISO 21622-2:2023(E)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 21622-2:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 21622-2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
4 Functionality .2
4.1 General . 2
4.2 Power tests . . . 3
4.2.1 Consumption . 3
4.2.2 Power loss . 4
4.3 Solenoid valve outputs . 8
4.3.1 Opening/closing solenoid valves . 8
4.3.2 Voltage and current, simulating SV . 9
4.3.3 Solenoid valve pulse width duration . 10
4.3.4 Short circuit and open circuit . 11
4.3.5 Remote unit operation with real solenoids .13
4.3.6 Association of sensors with solenoid valve outputs . 14
4.4 Counter entries . 16
4.4.1 Sensor power supply . 16
4.4.2 Flow calculation . 16
4.4.3 High flow alarm . 17
4.4.4 Low flow alarm . 17
4.4.5 Hardware pulse filtering — Maximum pulse rate and minimum pulse width . 17
4.4.6 Maximum frequency between pulses . 17
4.4.7 Minimum frequency between pulses . 18
4.4.8 Pulse filtering by software with fixed time . 18
4.4.9 Software pulse filtering with configurable time . 18
4.4.10 Minimum time between pulses . 19
4.4.11 Maximum time between pulses . 19
4.4.12 “Open contact” test .20
4.4.13 “Closed contact” test . 20
4.4.14 Random pulse counting test. 21
4.4.15 Concurrent pulse count test . 21
4.4.16 Counter events and alarms . 21
4.5 Analogue inputs . 22
4.5.1 General .22
4.5.2 Measurement accuracy .23
4.5.3 Events and alarms generated by the analogue input . 24
4.6 Other inputs and outputs . 27
4.6.1 Purpose of the test . 27
4.6.2 External signals . . 27
4.6.3 Internal signals .29
4.7 Operating logic .29
4.7.1 General .29
4.7.2 Low supply voltage safety interlock (lockout) test . .30
4.7.3 Low-pressure safety lockout test .30
4.7.4 Excess flow (flow rate) safety shutdown test .30
5 Robustness .31
5.1 Environmental conditions . 31
5.1.1 General . 31
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 21622-2:2023(E)
5.1.2 Solenoid valve actuation (SV) . 32
5.1.3 Counter pulses . 32
5.1.4 Analogue readout. 33
5.2 Power supply . 33
5.2.1 Polarity reversal in main power supply . 33
5.2.2 Short-circuit at the SV solenoid valve output . 33
5.3 Accidental wiring errors on inputs and outputs .34
5.3.1 Purpose of the test .34
5.4 Analogue input . 35
5.4.1 Overvoltage (analogue voltage input) . 35
5.4.2 Overcurrent (analogue input by current) . 35
5.4.3 Short circuit . 36
5.5 Communications . 37
5.5.1 Antenna short circuit test . 37
5.5.2 Antenna open circuit test . 37
5.6 Long-term behaviour . 37
5.6.1 Purpose of the test . 37
5.6.2 Test procedure. 37
5.6.3 Acceptance criteria .38
Annex A (Informative) Questionnaire for testing irrigation control systems.39
Bibliography .52
iv
© ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 21622-2:2023(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.
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 document 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.
A list of all parts in the ISO 21622 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 2023 – All rights reserved
---------------------- Page: 5 ----------------------
ISO 21622-2:2023(E)
Introduction
This document specifies the tests required to ensure the functionalities defined in the other parts of
the ISO 21622 series.
The purpose of the evaluation of the remote unit is intended to provide an opinion to serve as a guide to
determine the overall functionality and operability of a remote control system.
This document concerns the remotes of remote control systems for irrigated areas.
vi
© ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
INTERNATIONAL STANDARD ISO 21622-2:2023(E)
Irrigation techniques — Remote monitoring and control
for irrigation —
Part 2:
Tests
1 Scope
This document specifies the tests necessary to assess the functionality and robustness of remote units
used in irrigation remote control systems.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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/
3.1.1
control centre
CC
place to centralise the communications of all remote units
Note 1 to entry: It is usually accompanied by a system for monitoring remote equipment
3.1.2
remote unit
RU
microprocessor-based device that allows information to be obtained from an environment and sent
remotely to where it can be processed
3.1.3
solenoid valve
SV
remote controllable element which, after receiving a signal from the remote unit, changes its status by
allowing or not allowing the passage of water
3.1.4
nominal pressure
NP
working pressure of a hydraulic element
1
© ISO 2023 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 21622-2:2023(E)
3.1.5
water passage detector
WPD
element confirming the passage of water through a volumetric valve
3.1.6
limit switch detector
LSD
element that ensures that a volumetric valve opens fully
3.1.7
active pulse time
T
ON
time a pulse emitter is sending an active signal
3.1.8
inactive pulse time
T
OFF
time during which a pulse emitter does not send any signal
3.2 Symbols
T time
T maximum time for the counter to detect opening of SVs
CNA
T maximum time for the counter to detect SV closure
CNC
T maximum time for LSD to detect opening of volumetric valve
FCA
T maximum time for LSD to detect volumetric valve closing
FCC
T inactive pulse time
OFF
T active pulse time
ON
T maximum time for WPD to detect opening of volumetric valve
PAA
T maximum time for WPD to detect volumetric valve closure
PAC
V minimum operating voltage of the remote unit
MIN
V nominal operating voltage of the remote unit
NOM
V maximum operating voltage of the remote unit
MAX
V full operating voltage
OP
4 Functionality
4.1 General
The functionality tests detailed in this clause are intended to verify that the data provided by the
manufacturers in the questionnaire (see Annex A) agree with the data obtained in the laboratory tests
detailed in this document.
After each and every functionality test performed, it shall be verified that the remote unit is still
operational, fulfilling the basic functions, as defined by the manufacturer in the questionnaire (see
2
© ISO 2023 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 21622-2:2023(E)
Annex A), by checking it at the nominal voltage (V ) of the equipment, unless otherwise stated by the
NOM
manufacturer.
The manufacturer shall indicate which basic functions the remote unit shall maintain, but as a
minimum, it shall comply with the following:
— counter reading;
— solenoid valve actuation (opening and closing);
— maintains;
— time;
— counter readings;
— programming.
These verifications shall be defined by the manufacturer of the remote unit as they depend on the
characteristics of the remote unit.
Of all the tests indicated in the document, only those that apply shall be carried out, depending on the
characteristics of the equipment to be tested [characteristics defined by the manufacturer through the
questionnaire (see Annex A)].
All tests described in Clause 4 should be conducted by a laboratory conforming to ISO 17025.
Acceptance criteria
The test shall be considered satisfactory if the variation between the values indicated by the
manufacturer and the values obtained in the laboratory tests does not exceed:
— ±5 % of the value indicated by the manufacturer in the questionnaire (see Annex A) for the data of:
consumption, voltage, current, short-circuit and open-circuit resistance and on the lowest and
highest analogue signal value (added to the margin of error described by the manufacturer);
— ±10 % of the value indicated by the manufacturer in the questionnaire (see Annex A) in:
frequency and duration of pulses (to be recorded).
4.2 Power tests
4.2.1 Consumption
4.2.1.1 Purpose of the test
The purpose of these tests is to measure the power consumption of the remote unit in its different
operating modes and compare it with the data provided by the manufacturer. The manufacturer shall
provide information on the power used by its equipment, its operating range (nominal, minimum and
maximum voltage) and, where applicable, on the built-in protections and alarms.
4.2.1.2 Preparation
In order to measure the consumption of the remote unit, the part corresponding to the communications
module shall be separated, as far as possible, into each of the states in which it may be. The manufacturer
shall provide in the questionnaire (see Annex A) a definition and a way to enter each of the possible
states to enable the measurements to be carried out.
EXAMPLE Sleeping, standby, receiving, transmitting.
3
© ISO 2023 – All rights reserved
---------------------- Page: 9 ----------------------
ISO 21622-2:2023(E)
In all tests in this subclause, the power consumption shall be measured for each of its power modes.
Upon completion of each test, the test sequence shall be performed to verify the correct operation of the
remote unit.
4.2.1.3 Test procedure
4.2.1.3.1 Consumption at nominal full operating voltage (V ) in the different operating modes
OP
defined by the manufacturer
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input of the equipment under test.
b) Adjust the power supply until the nominal full operating voltage indicated by the manufacturer in
the questionnaire (see Annex A) is reached.
c) Measure the power consumption in each of the remote unit’s operating modes, as specified by the
manufacturer.
4.2.1.3.2 Power consumption at the minimum full operating voltage (V ) in the idle operating
OP
mode defined by the manufacturer
a) Power the remote unit by connecting an external, adjustable power supply to the corresponding
power input.
b) Adjust the power supply until it reaches the minimum full operating voltage specified by the
manufacturer
c) Measure the power consumption in the idle operating mode defined by the manufacturer.
4.2.1.3.3 Consumption at maximum full operating voltage (V ) in idle mode as defined by the
OP
manufacturer
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input.
b) Adjust the power supply to the maximum operating voltage specified by the manufacturer.
c) Measure the power consumption in the idle operating mode defined by the manufacturer.
4.2.1.4 Acceptance criteria
All tests in this subclause shall be considered satisfactory if the variation between the values indicated
by the manufacturer and the values obtained in the laboratory measurement does not exceed ±5 % of
the consumption specified by the manufacturer in the questionnaire (see Annex A).
4.2.2 Power loss
4.2.2.1 Purpose of the test
The aim of the group of tests described in this subclause is to check that the sudden loss of power to the
remote unit does not lead to a loss of critical values, such as irrigation schedules and counter values.
When power is restored, the remote unit shall continue to operate according to the manufacturer’s
instructions.
4.2.2.2 Scheduled irrigation test Case A — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
4
© ISO 2023 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 21622-2:2023(E)
b) Switch off the power to the remote unit at least 3 min before the irrigation programme starts.
c) Re-power after 1 min, ensuring that there is sufficient time for the remote to fully reset and become
fully operational, before scheduled irrigation begins.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, execution of the irrigation and the duration of the irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.3 Scheduled irrigation test Case B — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Remove power to the remote unit at least 1 min before irrigation begins.
c) Re-power 1 min after the programmed start of irrigation.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.4 Scheduled irrigation test Case C — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Switch off the voltage at least 1 min before the scheduled irrigation starts.
c) Re-power at least 1 min after the end of the irrigation time.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.5 Scheduled irrigation test Case D — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Interrupt power supply after 1 min from the start of the programmed irrigation time.
c) Re-power, 1 min before the scheduled end time.
5
© ISO 2023 – All rights reserved
---------------------- Page: 11 ----------------------
ISO 21622-2:2023(E)
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.6 Scheduled irrigation test Case E — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Interrupt the power supply 1 min before the scheduled irrigation end time.
c) Re-power 1 min after the scheduled end time.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
6
© ISO 2023 – All rights reserved
---------------------- Page: 12 ----------------------
ISO 21622-2:2023(E)
Key
X time
1 programme
A case A
B case B
C case C
D case D
E case E
Figure 1 — Scheduled irrigation
4.2.2.7 Counting pulse test with battery back up
4.2.2.7.1 General
This test shall only be performed if the remote unit has a backup power supply for the counter readings.
4.2.2.7.2 Test procedure
a) After reading the counter input (X) of the remote unit, switch off the power supply for 1 min.
b) During this time, send fifteen pulses spaced 4 s each (unless the manufacturer in the questionnaire
(see Annex A) indicates a longer time spacing between pulses), to the input of the same counter (X)
of the remote unit.
c) Check the count performed by the remote on the abovementioned input.
4.2.2.7.3 Acceptance criteria
The test shall be considered successful if the pulse count on all counter inputs is equal to the fifteen
pulses sent.
Repeat this test as many times as there are counter inputs to the remote unit.
7
© ISO 2023 – All rights reserved
---------------------- Page: 13 ----------------------
ISO 21622-2:2023(E)
4.2.2.8 Battery replacement test
4.2.2.8.1 Test procedure
a) Write down the counter value for each of the digital inputs of the remote unit.
For device
...
ISO/FDIS 21622-2:2023(E)
ISO/TC 23/SC 18
Date: 2022-04-05 2023-02-09
ISO/DIS 21622-2:2022(E)
ISO/TC 23/SC 18/WG
Secretariat: UNE SII
Irrigation techniques — Remote monitoring and control for irrigation — Part 2:
Tests
---------------------- Page: 1 ----------------------
ISO/FDIS 21622-2:2023(E)
© ISO 20222023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
part of this publication may be reproduced or utilized otherwise in any form or by any means,
electronic or mechanical, including photocopying, or posting on the internet or an intranet, without
prior written permission. Permission can be requested from either ISO at the address below or
ISO's member body in the country of the requester.
ISO Copyright Office
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: copyright@iso.org
Email: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 21622-2:2023(E)
Contents Page
Introduction .6
1 Purpose and scope .1
2 Normative references .1
3 Terms, definitions and symbols .1
3.1 Terms and definitions .1
3.2 Symbols .2
4 Functionality .3
4.1 General .3
4.2 Power tests .4
4.2.1 Consumption .4
4.2.2 Power loss .5
4.3 Solenoid valve outputs .8
4.3.1 Opening/closing solenoid valves .8
4.3.2 Voltage and current, simulating SV .9
4.3.3 Solenoid valve pulse width duration . 10
4.3.4 Short circuit and open circuit . 12
4.3.5 Remote unit operation with real solenoids . 14
4.3.6 Association of sensors with solenoid valve outputs . 15
4.4 Counter entries . 16
4.4.1 Sensor power supply . 16
4.4.2 Flow calculation . 17
4.4.3 High flow alarm . 17
4.4.4 Low flow alarm . 18
4.4.5 Hardware pulse filtering — Maximum pulse rate and minimum pulse width . 18
4.4.6 Maximum frequency between pulses . 18
4.4.7 Minimum frequency between pulses . 19
4.4.8 Pulse filtering by Software with fixed time . 19
4.4.9 Software pulse filtering with configurable time . 19
4.4.10 Minimum time between pulses . 20
4.4.11 Maximum time between pulses . 20
4.4.12 “Open contact” test . 21
4.4.13 “Closed contact” test . 21
4.4.14 Random pulse counting test . 22
4.4.15 Concurrent pulse count test . 22
4.4.16 Counter events and alarms . 22
4.5 Analogue inputs. 23
4.5.1 Measurement accuracy . 24
4.5.2 Events and alarms generated by the analogue input. 25
4.6 Other inputs and outputs . 28
4.6.1 Purpose of the test . 28
4.6.2 External signals . 28
4.6.3 Internal signals . 30
4.7 Operating logic . 30
4.7.1 Low supply voltage safety interlock (lockout) test . 31
4.7.2 Low-pressure safety lockout test . 31
4.7.3 Excess flow (flow rate) safety shutdown test . 31
5 Robustness . 32
5.1 Environmental conditions . 32
5.1.1 General . 32
© ISO 2023 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 21622-2:2023(E)
5.1.2 Solenoid valve actuation (SV) . 33
5.1.3 Counter pulses . 33
5.1.4 Analogue readout . 34
5.2 Power supply . 34
5.2.1 Polarity reversal in main power supply . 34
5.2.2 Short-circuit at the SV solenoid valve output . 35
5.3 Accidental wiring errors on inputs and outputs . 35
5.3.1 Purpose of the test . 35
5.4 Analogue input . 36
5.4.1 Overvoltage (analogue voltage input) . 36
5.4.2 Overcurrent (analogue input by current) . 37
5.4.3 Short circuit . 37
5.5 Communications . 38
5.5.1 Antenna short circuit test . 38
5.5.2 Antenna open circuit test . 38
5.6 Long-term behaviour . 39
5.6.1 Purpose of the test . 39
5.6.2 Test procedure . 39
5.6.3 Acceptance criteria . 39
ANNEX A (Informative) QUESTIONNAIRE FOR TESTING IRRIGATION CONTROL SYSTEMS. . 40
A.1 General Considerations . 40
A.2 System Specifications . 40
A.2.1 Manufacturer . 40
A.2.2 Basic functions of the system . 40
A.2.3 Basic functions that the remote unit allows after performing a test, defined in the
Functionality or Robustness protocol, at rated voltage . 41
A.2.4 Specific elements of the system . 42
Comments . 42
A.3 Specifications of the Remote unit . 42
A.3.1 Model . 42
A.3.2 Remote unit operating environment . 42
A.3.3 Useful life of the remote unit . 42
A.3.4 Power sources . 42
A.3.5 Other specifications . 43
A.3.6 Inputs/Outputs . 44
A.3.7 Solenoid valve output . 46
A.3.8 Water Meter input . 48
A.3.9 Analogue input: . 50
A.3.10 Other outputs and inputs . 52
A.3.11 Type of communication . 53
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 3
4 Functionality . 3
4.1 General . 3
iv © ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 21622-2:2023(E)
4.2 Power tests .4
4.2.1 Consumption .4
4.2.2 Power loss .5
4.3 Solenoid valve outputs .9
4.3.1 Opening/closing solenoid valves .9
4.3.2 Voltage and current, simulating SV . 10
4.3.3 Solenoid valve pulse width duration . 11
4.3.4 Short circuit and open circuit . 12
4.3.5 Remote unit operation with real solenoids . 15
4.3.6 Association of sensors with solenoid valve outputs . 16
4.4 Counter entries . 17
4.4.1 Sensor power supply . 17
4.4.2 Flow calculation . 18
4.4.3 High flow alarm . 18
4.4.4 Low flow alarm . 19
4.4.5 Hardware pulse filtering — Maximum pulse rate and minimum pulse width . 19
4.4.6 Maximum frequency between pulses . 19
4.4.7 Minimum frequency between pulses . 19
4.4.8 Pulse filtering by Software with fixed time . 20
4.4.9 Software pulse filtering with configurable time . 20
4.4.10 Minimum time between pulses . 21
4.4.11 Maximum time between pulses . 21
4.4.12 “Open contact” test . 21
4.4.13 “Closed contact” test . 22
4.4.14 Random pulse counting test . 22
4.4.15 Concurrent pulse count test . 23
4.4.16 Counter events and alarms . 23
4.5 Analogue inputs. 24
4.5.1 General . 24
4.5.2 Measurement accuracy . 24
4.5.3 Events and alarms generated by the analogue input. 26
4.6 Other inputs and outputs . 29
4.6.1 Purpose of the test . 29
4.6.2 External signals . 29
4.6.3 Internal signals . 30
4.7 Operating logic . 31
4.7.1 General . 31
4.7.2 Low supply voltage safety interlock (lockout) test . 32
4.7.3 Low-pressure safety lockout test . 32
4.7.4 Excess flow (flow rate) safety shutdown test . 32
5 Robustness . 33
5.1 Environmental conditions . 33
5.1.1 General . 33
5.1.2 Solenoid valve actuation (SV). 34
5.1.3 Counter pulses . 34
5.1.4 Analogue readout . 35
5.2 Power supply . 35
5.2.1 Polarity reversal in main power supply . 35
5.2.2 Short-circuit at the SV solenoid valve output . 35
5.3 Accidental wiring errors on inputs and outputs . 36
5.3.1 Purpose of the test . 36
5.4 Analogue input. 37
5.4.1 Overvoltage (analogue voltage input). 37
5.4.2 Overcurrent (analogue input by current). 37
© ISO 2023 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/FDIS 21622-2:2023(E)
5.4.3 Short circuit . 38
5.5 Communications . 39
5.5.1 Antenna short circuit test . 39
5.5.2 Antenna open circuit test . 39
5.6 Long-term behaviour . 39
5.6.1 Purpose of the test . 39
5.6.2 Test procedure . 40
5.6.3 Acceptance criteria . 40
Annex A (Informative) Questionnaire for testing irrigation control systems . 41
Bibliography . 64
vi © ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/FDIS 21622-2:2023(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.
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/directiveswww.iso.org/directives).
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. Details of any
patent rights identified during the development of the document shall be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patentswww.iso.org/patents).
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.htmlwww.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 document is intended to be used in conjunction with ISO 21622-1.
A list of all parts in the ISO 21622 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.htmlwww.iso.org/members.html.
© ISO 2023 – All rights reserved vii
---------------------- Page: 7 ----------------------
ISO/FDIS 21622-2:2023(E)
Introduction
This document specifies the tests required to ensure the functionalities defined in the other parts of the
ISO 21622 series.
The purpose of the evaluation of the remote unit is intended to provide an
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21622-2
ISO/TC 23/SC 18
Irrigation techniques — Remote
Secretariat: SII
monitoring and control for
Voting begins on:
2023-02-13 irrigation —
Voting terminates on:
Part 2:
2023-04-10
Tests
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 21622-2:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 1 ----------------------
ISO/FDIS 21622-2:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 21622-2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
4 Functionality .2
4.1 General . 2
4.2 Power tests . . . 3
4.2.1 Consumption . 3
4.2.2 Power loss . 4
4.3 Solenoid valve outputs . 8
4.3.1 Opening/closing solenoid valves . 8
4.3.2 Voltage and current, simulating SV . 9
4.3.3 Solenoid valve pulse width duration . 10
4.3.4 Short circuit and open circuit . 11
4.3.5 Remote unit operation with real solenoids .13
4.3.6 Association of sensors with solenoid valve outputs . 14
4.4 Counter entries . 16
4.4.1 Sensor power supply . 16
4.4.2 Flow calculation . 16
4.4.3 High flow alarm . 17
4.4.4 Low flow alarm . 17
4.4.5 Hardware pulse filtering — Maximum pulse rate and minimum pulse width . 17
4.4.6 Maximum frequency between pulses . 17
4.4.7 Minimum frequency between pulses . 18
4.4.8 Pulse filtering by Software with fixed time . 18
4.4.9 Software pulse filtering with configurable time . 18
4.4.10 Minimum time between pulses . 19
4.4.11 Maximum time between pulses . 19
4.4.12 “Open contact” test .20
4.4.13 “Closed contact” test . 20
4.4.14 Random pulse counting test. 21
4.4.15 Concurrent pulse count test . 21
4.4.16 Counter events and alarms . 21
4.5 Analogue inputs . 22
4.5.1 General .22
4.5.2 Measurement accuracy .23
4.5.3 Events and alarms generated by the analogue input . 24
4.6 Other inputs and outputs . 27
4.6.1 Purpose of the test . 27
4.6.2 External signals . . 27
4.6.3 Internal signals .29
4.7 Operating logic .29
4.7.1 General .29
4.7.2 Low supply voltage safety interlock (lockout) test . .30
4.7.3 Low-pressure safety lockout test .30
4.7.4 Excess flow (flow rate) safety shutdown test .30
5 Robustness .31
5.1 Environmental conditions . 31
5.1.1 General . 31
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/FDIS 21622-2:2023(E)
5.1.2 Solenoid valve actuation (SV) . 32
5.1.3 Counter pulses . 32
5.1.4 Analogue readout. 33
5.2 Power supply . 33
5.2.1 Polarity reversal in main power supply . 33
5.2.2 Short-circuit at the SV solenoid valve output . 33
5.3 Accidental wiring errors on inputs and outputs .34
5.3.1 Purpose of the test .34
5.4 Analogue input . 35
5.4.1 Overvoltage (analogue voltage input) . 35
5.4.2 Overcurrent (analogue input by current) . 35
5.4.3 Short circuit . 36
5.5 Communications . 37
5.5.1 Antenna short circuit test . 37
5.5.2 Antenna open circuit test . 37
5.6 Long-term behaviour . 37
5.6.1 Purpose of the test . 37
5.6.2 Test procedure. 37
5.6.3 Acceptance criteria .38
Annex A (Informative) Questionnaire for testing irrigation control systems .39
Bibliography .52
iv
© ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 21622-2:2023(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.
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).
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. Details of
any patent rights identified during the development of the document shall be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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 document is intended to be used in conjunction with ISO 21622-1.
A list of all parts in the ISO 21622 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 2023 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/FDIS 21622-2:2023(E)
Introduction
This document specifies the tests required to ensure the functionalities defined in the other parts of
the ISO 21622 series.
The purpose of the evaluation of the remote unit is intended to provide an opinion to serve as a guide to
determine the overall functionality and operability of a remote control system.
This document concerns the remotes of remote control systems for irrigated areas.
vi
© ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21622-2:2023(E)
Irrigation techniques — Remote monitoring and control
for irrigation —
Part 2:
Tests
1 Scope
This document specifies the tests necessary to assess the functionality and robustness of remote units
used in irrigation remote control systems.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological 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/
3.1.1
control centre
CC
place to centralise the communications of all remote units
Note 1 to entry: It is usually accompanied by a system for monitoring remote equipment
3.1.2
remote unit
RU
microprocessor-based device that allows information to be obtained from an environment and sent
remotely to where it can be processed
3.1.3
solenoid valve
SV
remote controllable element which, after receiving a signal from the remote unit, changes its status by
allowing or not allowing the passage of water
3.1.4
nominal pressure
NP
working pressure of a hydraulic element
1
© ISO 2023 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/FDIS 21622-2:2023(E)
3.1.5
water passage detector
WPD
element confirming the passage of water through a volumetric valve
3.1.6
limit switch detector
LSD
element that ensures that a volumetric valve opens fully
3.1.7
active pulse time
T
ON
time a pulse emitter is sending an active signal
3.1.8
inactive pulse time
T
OFF
time during which a pulse emitter does not send any signal
3.2 Symbols
T time
T maximum time for the counter to detect opening of SVs
CNA
T maximum time for the counter to detect SV closure
CNC
T maximum time for LSD to detect opening of volumetric valve
FCA
T maximum time for LSD to detect volumetric valve closing
FCC
T inactive pulse time
OFF
T active pulse time
ON
T maximum time for WPD to detect opening of volumetric valve
PAA
T maximum time for WPD to detect volumetric valve closure
PAC
V minimum operating voltage of the remote unit
MIN
V nominal operating voltage of the remote unit
NOM
V maximum operating voltage of the remote unit
MAX
V full operating voltage
OP
4 Functionality
4.1 General
The functionality tests detailed in this clause are intended to verify that the data provided by the
manufacturers in the questionnaire (see Annex A) agree with the data obtained in the laboratory tests
detailed in this document.
After each and every functionality test performed, it shall be verified that the remote unit is still
operational, fulfilling the basic functions, as defined by the manufacturer in the questionnaire (see
2
© ISO 2023 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/FDIS 21622-2:2023(E)
Annex A), by checking it at the nominal voltage (V ) of the equipment, unless otherwise stated by the
NOM
manufacturer.
The manufacturer shall indicate which basic functions the remote unit shall maintain, but as a
minimum, it shall comply with the following:
— counter reading;
— solenoid valve actuation (opening and closing);
— maintains;
— time;
— counter readings;
— programming.
These verifications shall be defined by the manufacturer of the remote unit as they depend on the
characteristics of the remote unit.
Of all the tests indicated in the document, only those that apply shall be carried out, depending on the
characteristics of the equipment to be tested [characteristics defined by the manufacturer through the
questionnaire (see Annex A)].
All tests described in Clause 4 should be conducted by a laboratory conforming to ISO 17025.
Acceptance criteria
The test shall be considered satisfactory if the variation between the values indicated by the
manufacturer and the values obtained in the laboratory tests does not exceed:
— ±5 % of the value indicated by the manufacturer in the questionnaire (see Annex A) for the data of:
consumption, voltage, current, short-circuit and open-circuit resistance and on the lowest and
highest analogue signal value (added to the margin of error described by the manufacturer);
— ±10 % of the value indicated by the manufacturer in the questionnaire (see Annex A) in:
frequency and duration of pulses (to be recorded).
4.2 Power tests
4.2.1 Consumption
4.2.1.1 Purpose of the test
The purpose of these tests is to measure the power consumption of the remote unit in its different
operating modes and compare it with the data provided by the manufacturer. The manufacturer shall
provide information on the power used by its equipment, its operating range (nominal, minimum and
maximum voltage) and, where applicable, on the built-in protections and alarms.
4.2.1.2 Preparation
In order to measure the consumption of the remote unit, the part corresponding to the communications
module shall be separated, as far as possible, into each of the states in which it may be. The manufacturer
shall provide in the questionnaire (see Annex A) a definition and a way to enter each of the possible
states to enable the measurements to be carried out.
EXAMPLE Sleeping, standby, receiving, transmitting.
3
© ISO 2023 – All rights reserved
---------------------- Page: 9 ----------------------
ISO/FDIS 21622-2:2023(E)
In all tests in this subclause, the power consumption shall be measured for each of its power modes.
Upon completion of each test, the test sequence shall be performed to verify the correct operation of the
remote unit.
4.2.1.3 Test procedure
4.2.1.3.1 Consumption at nominal full operating voltage (V ) in the different operating modes
OP
defined by the manufacturer
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input of the equipment under test.
b) Adjust the power supply until the nominal full operating voltage indicated by the manufacturer in
the questionnaire (see Annex A) is reached.
c) Measure the power consumption in each of the remote unit’s operating modes, as specified by the
manufacturer.
4.2.1.3.2 Power consumption at the minimum full operating voltage (V ) in the idle operating
OP
mode defined by the manufacturer
a) Power the remote unit by connecting an external, adjustable power supply to the corresponding
power input.
b) Adjust the power supply until it reaches the minimum full operating voltage specified by the
manufacturer
c) Measure the power consumption in the idle operating mode defined by the manufacturer.
4.2.1.3.3 Consumption at maximum full operating voltage (V ) in idle mode as defined by the
OP
manufacturer
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input.
b) Adjust the power supply to the maximum operating voltage specified by the manufacturer.
c) Measure the power consumption in the idle operating mode defined by the manufacturer.
4.2.1.4 Acceptance criteria
All tests in this subclause shall be considered satisfactory if the variation between the values indicated
by the manufacturer and the values obtained in the laboratory measurement does not exceed ±5 % of
the consumption specified by the manufacturer in the questionnaire (see Annex A).
4.2.2 Power loss
4.2.2.1 Purpose of the test
The aim of the group of tests described in this subclause is to check that the sudden loss of power to the
remote unit does not lead to a loss of critical values, such as irrigation schedules and counter values.
When power is restored, the remote unit shall continue to operate according to the manufacturer’s
instructions.
4.2.2.2 Scheduled irrigation test Case A — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
4
© ISO 2023 – All rights reserved
---------------------- Page: 10 ----------------------
ISO/FDIS 21622-2:2023(E)
b) Switch off the power to the remote unit at least 3 min before the irrigation programme starts.
c) Re-power after 1 min, ensuring that there is sufficient time for the remote to fully reset and become
fully operational, before scheduled irrigation begins.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, execution of the irrigation and the duration of the irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.3 Scheduled irrigation test Case B — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Remove power to the remote unit at least 1 min before irrigation begins.
c) Re-power 1 min after the programmed start of irrigation.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.4 Scheduled irrigation test Case C — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Switch off the voltage at least 1 min before the scheduled irrigation starts.
c) Re-power at least 1 min after the end of the irrigation time.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.5 Scheduled irrigation test Case D — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Interrupt power supply after 1 min from the start of the programmed irrigation time.
c) Re-power, 1 min before the scheduled end time.
5
© ISO 2023 – All rights reserved
---------------------- Page: 11 ----------------------
ISO/FDIS 21622-2:2023(E)
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
4.2.2.6 Scheduled irrigation test Case E — Test procedure
a) Schedule irrigation of sufficient duration (as defined by the manufacturer in their remote unit
operating manual) to perform this test.
b) Interrupt the power supply 1 min before the scheduled irrigation end time.
c) Re-power 1 min after the scheduled end time.
d) Record the actions carried out by the remote:
— Execution of irrigation: YES/NO
— YES: record the delay time, if any, in the execution of the irrigation and the duration of the
irrigation.
— Alarm generation: YES/NO
— YES: record the type of alarm.
6
© ISO 2023 – All rights reserved
---------------------- Page: 12 ----------------------
ISO/FDIS 21622-2:2023(E)
Key
X time
1 programme
A case A
B case B
C case C
D case D
E case E
Figure 1 — Scheduled irrigation
4.2.2.7 Counting pulse test with battery back up
4.2.2.7.1 General
This test shall only be performed if the remote unit has a backup power supply for the counter readings.
4.2.2.7.2 Test procedure
a) After reading the counter input (X) of the remote unit, switch off the power supply for 1 min.
b) During this time, send fifteen pulses spaced 4 s each (unless the manufacturer in the questionnaire
(see Annex A) indicates a longer time spacing between pulses), to the input of the same counter (X)
of the remote unit.
c) Check the count performed by the remote on the abovementioned input.
4.2.2.7.3 Acceptance criteria
The test shall be considered successful if the pulse count on all counter inputs is equal
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.