ISO 21622-2:2023

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 2023
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ii
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
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
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
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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
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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
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
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
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
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.
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.
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.
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.
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.
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 devices that are able to run an irrigation schedule:
Schedule an irrigation that is not to be run immediately.
b) Disconnect the main battery(ies), for 5 min, following the manufacturer’s instructions.
c) Reconnect the main battery(ies), following the manufacturer’s instructions.
d) Record the values maintained by the equipment.
4.2.2.8.2 Acceptance criteria
If a remote unit with battery backup is being tested the values shall be the same as recorded before the
loss of power.
If testing a remote unit without battery backup the performance of the remote unit shall be in
accordance with the manufacturer’s specifications in the questionnaire (see Annex A).
4.3 Solenoid valve outputs
4.3.1 Opening/closing solenoid valves
4.3.1.1 Purpose of the test
The purpose of these tests is to check the behaviour of the remote units when acting on the solenoid
valve (SV) outputs.
4.3.1.2 Test procedure
These tests consist of sending open and close commands through the circuit that triggers the solenoid.
Three types of test shall be simulated.
— Simulation of solenoid valve with resistors: the test shall be performed by connecting a physical
resistor of the Ohms corresponding to that specified by the manufacturer of the remote unit.
— Real unpressurised SV test: the test shall be performed by connecting a commercial SV within the
range of voltages and pulse widths specified by the remote unit manufacturer to the SV output of
the remote unit.
— Test with real solenoid valve and nominal pressure (NP): the test is performed by connecting a
commercial SV to the solenoid valve output of the remote unit, which shall be connected, in turn, to
a hydraulic circuit.
In all 3 cases, send ten commands (5 openings and 5 closings) to each solenoid valve output of the
remote unit.
If the remote unit can trigger solenoid valves of different voltages, it shall be tested with the most
characteristic values of the market, according to the questionnaire (see Annex A), by adjusting the
parameters in the remote unit.
4.3.1.3 Acceptance criteria
The test is considered valid when:
— the 5 openings/closings are confirmed in the manufacturer’s control software in all cases;
— the actuation of the solenoid valve is confirmed in the case of the test without hydraulic pressure;
— the actuation of the SV is confirmed in the case of the test with a real solenoid valve and at NP, by the
passage of water.
In all cases, after the tests have been carried out, the remote shall continue to operate as usual.
4.3.2 Voltage and current, simulating SV
4.3.2.1 Purpose of the test
The purpose of these tests is to check the voltage and power consumption values of the remote unit
when opening and closing solenoid valves (SV).
These tests shall be carried out at the voltages and currents specified by the manufacturer.
4.3.2.2 Test procedure
4.3.2.2.1 Maximum current for SV tripping at nominal operating voltage (V ) with trip voltage
OP
NOT configurable
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input of the remote unit under test.
b) Adjust the power supply until the nominal operating voltage indicated by the manufacturer is
reached.
c) Perform solenoid valve opening and closing from the remote unit.
d) Measure the tripping voltage and the maximum current (discarding the first 100 ms of the
measurement in case of AC solenoid so, the inrush current is not taken into account) delivered by
the remote unit through the corresponding solenoid valve output. A shunt 100 times smaller than
the simulated solenoid valve connected in series shall be used for the measurement.
4.3.2.2.2 Maximum current for SV tripping at nominal operating voltage with configurable
minimum trip voltage
This test shall only be performed if the remote unit has configurable solenoid valve voltage.
a) Power the remote unit by connecting an external adjustable power supply to the corresponding
power input.
b) Adjust the power supply until the nominal operating voltage indicated by the manufacturer is
reached.
c) Set the minimum solenoid valve trip voltage on the remote unit.
d) Perform the opening and closing from the remote unit.
e) Measure the tripping voltage and the maximum current delivered by the remote unit through the
corresponding solenoid valve output. For the peak current measurement, a resistor of calculated
value shall be connected and measured in a shunt at least 100 times smaller than the simulated SV,
connected in series.
4.3.2.2.3 Maximum current for solenoid valve actuation at nominal operating voltage with
configurable maximum tripping voltage
This test shall only be performed if the remote unit has configurable solenoid valve voltage.
a) Power the remote unit by connecting an external, adjustable power supply to the corresponding
power input.
b) Adjust the power supply until the nominal operating voltage is reached.
c) Set the maximum solenoid valve trip voltage on the remote unit. Opening and closing is performed
from the remote unit.
d) Measure the tripping voltage and the maximum current delivered by the remote unit through the
corresponding solenoid valve output. For the peak current measurement, a resistance of calculated
value shall be connected and measured in a shunt at least 100 times smaller than the simulated
solenoid valve, connected in series.
4.3.2.3 Acceptance criteria
The test shall be considered successful if the variation between the values indicated by the manufacturer
and the values obtained in the laboratory measurement does not exceed ±5 % of the value given by the
manufacturer in the questionnaire (see Annex A) for voltage and consumption data for SV tripping.
4.3.3 Solenoid valve pulse width duration
4.3.3.1 Purpose of the test
The purpose of these tests is to determine the tripping time of the remote unit on the solenoid valves.
4.3.3.2 Test procedure
4.3.3.2.1 Test at nominal operating SV trip voltage with NON-configurable trip time
a) Set to the full operating voltage specified by the manufacturer, using an adjustable power supply.
b) Send 10 commands (5 openings and 5 closings) to each of the remote unit’s solenoid actuated
outputs. The commands shall be spaced according to the minimum firing time set by each
manufacturer.
c) Measure the pulse duration with the help of an oscilloscope, connected to the corresponding SV
output of the remote unit.
4.3.3.2.2 Nominal operating solenoid valve trip voltage test with configurable trip time.
Minimum trigger time
This test shall only be performed if the remote unit has configurable pulse width duration on solenoid
valve actuation.
a) Set the full actuating voltage, with the help of an adjustable power source. Set the operating voltage
of the solenoid valve to its nominal value and the pulse duration to the minimum.
b) Send 10 commands (5 openings and 5 closings) to each of the remote unit’s solenoid actuated
outputs. The commands shall be spaced according to the manufacturer’s minimum trigger time
between pulses.
c) Measure the pulse width duration with the help of an oscilloscope, connected to the corresponding
solenoid valve output of the remote unit.
4.3.3.2.3 Nominal operating solenoid valve trip voltage test with configurable trip time —
Maximum trigger time
This test shall only be performed if the remote unit has configurable pulse width duration on SV
actuation.
a) Set the solenoid valve actuating voltage to its nominal value and the pulse duration to the maximum
according to the manufacturer’s instructions.
b) Send 10 commands (5 openings and 5 closings) to each of the remote unit’s solenoid actuated
outputs. The commands shall be spaced according to the manufacturer’s minimum trigger time
between pulses.
c) Measure the pulse width duration with the help of an oscilloscope, connected to the corresponding
solenoid valve output of the remote unit.
4.3.3.3 Acceptance criteria
The test shall be considered successful if the variation between the values indicated by the manufacturer
and the values obtained in the laboratory measurement does not exceed:
— ±5 % of the value given by the manufacturer in the questionnaire (see Annex A) for the maximum
tripping times for solenoid valve actuation.
— 10 requested commands shall be completed correctly.
4.3.4 Short circuit and open circuit
4.3.4.1 Purpose of the test
The purpose of these tests is to determine the response of the remote unit to a short or open circuit.
4.3.4.2 Short-circuit (overcurrent) detection with NON-configurable alarm level
4.3.4.2.1 Test procedure
This test shall only be performed if the remote unit accepts a short circuit on its solenoid valve outputs.
a) Set the solenoid valve actuation voltage to the value indicated by the manufacturer.
b) Connect a calculated resistor, indicated by the manufacturer, to the solenoid valve output, which
shall be the value of the solenoid valve resistor for short-circuit detection at the solenoid valve
output of the remote unit.
c) Send 10 commands (5 open and 5 close) to the solenoid.
4.3.4.2.2 Acceptance criteria
Check that one of the following conditions occurs:
a) The manoeuvre does not take place.
b) The remote unit detects a short circuit.
Record the condition that has been met with the current data at the output of the remote unit, as well as
the voltage and resistance.
4.3.4.3 Short-circuit detection (overcurrent) with configurable alarm level — Configurable
minimum tripping voltage
4.3.4.3.1 Test procedure
This test shall only be performed if the remote unit accepts a short circuit on its solenoid valve outputs.
This test shall be carried out in the same way as in 4.3.4.2.1, by setting the remote unit to the minimum
configurable tripping voltage allowed by the manufacturer.
4.3.4.3.2 Acceptance criteria
The test shall be considered successful if one of the following conditions occurs:
a) the manoeuvre does not take place;
b) the remote unit detects a short circuit.
4.3.4.4 Short circuit (overcurrent) detection with configurable alarm level — Maximum trip
voltage configurable
4.3.4.4.1 Test procedure
This test shall only be performed if the remote unit accepts a short circuit on its solenoid valve outputs.
This test shall be carried out in the same way as in 4.3.4.2.1, by setting the remote unit to the maximum
configurable tripping voltage allowed by the manufacturer.
4.3.4.4.2 Acceptance criteria
The test shall be considered successful if one of the following conditions occurs:
a) the manoeuvre does not take place;
b) the remote unit detects a short circuit.
4.3.4.5 Open-circuit detection (undercurrent) with NON-configurable alarm level
4.3.4.5.1 Test procedure
This test is only performed if the remote unit accepts open circuit on its solenoid valve outputs.
a) Set the trip voltage of SV to the value indicated by the manufacturer.
b) Connect a calculated resistor specified by the manufacturer for the SV resistance value for open
circuit detection, and/or output current for open circuit detection to the solenoid valve output of
the remote unit.
c) Send commands to the solenoid.
4.3.4.5.2 Acceptance criteria
Check that one of the following conditions occurs:
a) the manoeuvre does not take place;
b) the remote unit detects a short circuit.
Record the condition that has been met with the current data at the output of the remote unit, as well as
the parallel voltage and resistance.
4.3.4.6 Open circuit detection (undercurrent) with configurable alarm level — Configurable
minimum tripping voltage
4.3.4.6.1 Test procedure
This test shall only be performed if the remote unit accepts open circuit on its solenoid valve outputs.
This test shall be carried out in the same way as in 4.3.4.5.1 by setting the remote unit to the minimum
configurable tripping voltage allowed by the manufacturer.
4.3.4.6.2 Acceptance criteria
The test shall be considered valid if one of the following conditions occurs:
a) the manoeuvre does not take place;
b) the remote unit detects a short circuit.
4.3.4.7 Open circuit detection (undercurrent) with configurable alarm level — Maximum trip
voltage configurable
4.3.4.7.1 Test procedure
This test shall only be performed if the remote unit accepts open circuit on its solenoid valve outputs.
This test shall be carried out in the same way as in 4.3.4.6.1, by setting the remote unit to the minimum
configurable tripping voltage allowed by the manufacturer.
4.3.4.7.2 Acceptance criteria
The test shall be considered successful if one of the following conditions occurs:
a) the manoeuvre does not take place;
b) the remote unit detects a short circuit.
4.3.5 Remote unit operation with real solenoids
4.3.5.1 Maximum current for typical market SV actuation
4.3.5.1.1 Test procedure
The test shall be performed for each of the SV actuating voltages supported by the remote unit, and
indicated in the questionnaire (see Annex A) by the manufacturer.
a) If the remote unit allows it, set the appropriate voltage for each model of solenoid valve commonly
available on the market, and connect the solenoids to the outputs.
b) Send 10 commands (5 openings and 5 closings) to each of the solenoids. The commands shall
be spaced according to the minimum trip time allowed by the solenoid valve hydraulics (if the
minimum trip time allowed by the remote unit is less than the minimum trip time allowed by the
solenoid valve hydraulics, the former shall be the conditioning time for the test).
c) Record voltage and current data as well as the results of the manoeuvres.
4.3.5.1.2 Acceptance criteria
The test shall be considered successful if the variation between the values indicated by the manufacturer
and the values obtained in the laboratory measurement does not exceed:
— ±5 % of the value given by the manufacturer in the questionnaire (see Annex A) for SV performance
consumptions;
— 10 requested commands shall be completed correctly.
4.3.5.2 Simultaneous programming and manoeuvring test
4.3.5.2.1 Test procedure
a) If the remote unit allows it, connect a solenoid of the same characteristics to each of the solenoid
valve outputs of the remote unit.
b) Make a schedule for each SV, so that they are triggered at exactly the same time, in order to verify
whether they are triggered simultaneously or sequentially and with
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