oSIST prEN ISO 19932-2:2022

Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO/DIS 19932-2:2022)

ISO 19932-2:2013 specifies test methods for the verification of requirements of ISO 19932-1:2013 for knapsack sprayers carried on the back or shoulder of the operator for use with plant protection products.
It is applicable to lever-operated knapsack sprayers, knapsack compression sprayers and knapsack sprayers driven by an engine or electric motor using hydraulic pressure atomisation of the spray liquid, with a nominal volume of more than 3 l for their intended use primarily in agriculture and horticulture.
It does not apply to knapsack mistblowers according to ISO 28139.

Pflanzenschutzgeräte - Tragbare Geräte - Teil 2: Prüfverfahren (ISO/DIS 19932-2:2022)

Dieses Dokument legt spezifische Prüfverfahren zur Überprüfung der Anforderungen nach ISO 19932 1:20XX für tragbare Geräte fest, die von der Bedienungsperson zur Anwendung von Pflanzenschutzmitteln auf dem Rücken oder der Schulter getragen werden.
Es gilt für tragbare Spritzgeräte, die mit einem Hebel betätigt werden (Handhebel-Spritzgeräte), Druckspeicher-Spritzgeräte sowie Spritzgeräte, die von einem Verbrennungs- oder einem Elektromotor angetrieben werden (Motor-Spritzgeräte), und hydraulischen Druck für die Zerstäubung der Spritzflüssigkeit verwenden; er gilt für Geräte mit einem Nennvolumen von mehr als 6,0 l, die insbesondere für eine Verwendung in der Land- und Forstwirtschaft und im Gartenbau vorgesehen sind.
Es gilt nicht für tragbare Blasluftspritzgeräte nach ISO 28139, die mit einem Verbrennungsmotor betrieben werden.
Zur Annahme der Übereinstimmung mit den grundlegenden Anforderungen der EU Richtlinie 2006/42/EG muss dieses Dokument in Verbindung mit ISO 19932 1:20XX verwendet werden.

Matériel de protection des cultures —- Pulvérisateurs à dos —- Partie 2: Méthodes d'essai (ISO/DIS 19932-2:2022)

L'ISO 19932-2:2013 spécifie des méthodes d'essai pour la vérification des exigences de l'ISO 19932‑1 relatives aux pulvérisateurs à dos destinés à être utilisés avec des produits de protection des cultures et que l'opérateur porte sur le dos ou l'épaule.
Elle est applicable aux pulvérisateurs à dos à pression entretenue, aux pulvérisateurs à dos à pression préalable et aux pulvérisateurs à dos entraînés par un moteur ou un moteur électrique utilisant la pulvérisation sous pression hydraulique du liquide à pulvériser, dont le volume nominal est d'au moins 3 l, dans le cadre de leur usage prévu, en particulier en agriculture et en horticulture.
Elle n'est pas applicable aux nébulisateurs à dos selon l'ISO 28139.

Oprema za zaščito poljščin - Nahrbtni škropilniki - 2. del: Preskusne metode (ISO/DIS 19932-2:2022)

General Information

• Status: Not Published
• Public Enquiry End Date: 11-Sep-2022
• ICS: 65.060.40 - Plant care equipment
• Technical Committee: IMKG - Machinery for agriculture and forestry
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 30-Jun-2022
• Due Date: 17-Nov-2022
• Completion Date: 16-Sep-2022
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: prEN ISO 19932-2 - Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO/DIS 19932-2:2022)

Relations

• Revised: SIST EN ISO 19932-2:2013 - Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO 19932-2:2013)
• Effective Date: 06-Oct-2021
• Revised: SIST EN ISO 19932-2:2013 - Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO 19932-2:2013)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 19932-2:2013 - Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO 19932-2:2013)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 19932-2:2022
01-september-2022
Oprema za zaščito poljščin - Nahrbtni škropilniki - 2. del: Preskusne metode
(ISO/DIS 19932-2:2022)
Equipment for crop protection - Knapsack sprayers - Part 2: Test methods (ISO/DIS
19932-2:2022)
Pflanzenschutzgeräte - Tragbare Geräte - Teil 2: Prüfverfahren (ISO/DIS 19932-2:2022)
Matériel de protection des cultures - Pulvérisateurs à dos - Partie 2: Méthodes d'essai
(ISO/DIS 19932-2:2022)
Ta slovenski standard je istoveten z: prEN ISO 19932-2
ICS:
65.060.40 Oprema za nego rastlin Plant care equipment
oSIST prEN ISO 19932-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 19932-2:2022

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oSIST prEN ISO 19932-2:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19932-2
ISO/TC 23/SC 6 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2022-06-20 2022-09-12
Equipment for crop protection — Knapsack sprayers —
Part 2:
Test methods
Matériel de protection des cultures — Pulvérisateurs à dos —
Partie 2: Méthodes d'essai
ICS: 65.060.40
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 19932-2:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 19932-2
ISO/TC 23/SC 6 Secretariat: AFNOR
Voting begins on: Voting terminates on:

Equipment for crop protection — Knapsack sprayers —
Part 2:
Test methods
Matériel de protection des cultures — Pulvérisateurs à dos —
Partie 2: Méthodes d'essai
ICS: ISO ics
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2022
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 19932-2:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2022 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test liquids and equipment . 1
5 General . 2
5.1 Test conditions . 2
5.2 Sprayer . 2
5.3 Functional tests . 3
5.3.1 Shut-off device reliability . 3
5.3.2 Spray liquid output . 3
5.3.3 Load carrying straps and their fixation points . 3
5.3.4 Stability . 3
5.3.5 Contents gauge scale and total volume . 3
5.3.6 Filling rate . 4
5.3.7 Emptying . 5
5.3.8 Absorbency of harness . 5
5.4 Pressure test . . 5
5.5 Leakage test . 6
5.6 Centre of gravity . 6
6 Specific tests for lever-operated knapsack sprayers . 7
6.1 Preconditioning . 7
6.2 Volume of the external surface deposit . 8
6.3 Volume of total residual liquid . 8
6.4 Drop test . 8
7 Specific tests for engine- or motor-driven knapsack sprayers . 9
7.1 Volume of external surface deposit . 9
7.2 Volume of total residual liquid . 9
8 Specific tests for compression sprayers .10
8.1 Volume test . 10
8.1.1 Volume of external surface deposit . 10
8.1.2 Volume of total residual liquid . 10
8.2 Drop test . 11
9 Test report .11
Annex A (informative) Example of a preconditioning device .12
Annex B (informative) Example of a shut-off test device .13
Annex C (informative) Example of a strap test device .14
Annex D (informative) Example of drop test device .15
Annex E (informative) Example of filling device .16
Annex F (normative) Minimum content of test report .18
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC amended by Directive 2009/127/EC
aimed to be covered . .23
iii
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(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 will 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 6, Equipment for crop protection.
This third edition cancels and replaces the second edition (ISO 19932-2:2013), which has been
technically revised. The main changes compared to the previous edition are as follows.
— The scope has been changed to include sprayers with a nominal volume of more than 6 l in order to
address sprayers in professional use only.
— The test methods have been aligned with the modified requirements of ISO 19932-1.
A list of all parts in the ISO 19932 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.
iv
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
Introduction
The application of plant protection products with knapsack sprayers should take into consideration
biological, economic, environmental and operator issues.
The aim of this document is to specify test methods for the verification of requirements for equipment
to ensure safe use and protect the environment.
Implementation of ISO 19932-1:20XX and ISO 19932-2:20XX will achieve an appropriate level of operator
safety and avoid unnecessary dispersal of plant protection products into the environment.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.)
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
v
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oSIST prEN ISO 19932-2:2022

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oSIST prEN ISO 19932-2:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 19932-2:2022(E)
Equipment for crop protection — Knapsack sprayers —
Part 2:
Test methods
1 Scope
This document specifies particular test methods for the verification of requirements of ISO 19932-1:20XX
for knapsack sprayers carried on the back or shoulder of the operator for use with plant protection
products.
It is applicable to lever-operated knapsack sprayers, knapsack compression sprayers and knapsack
sprayers driven by an engine or electric motor using hydraulic pressure atomization of the spray liquid
intended to be used primarily in agriculture, forestry and horticulture with a nominal volume of more
than 6,0 l.
It does not apply to knapsack combustion engine-driven air-blast sprayers covered by ISO 28139.
To give presumption of conformity with the Essential Requirements of EU Directive 2006/42/EC, this
document shall only be applied in conjunction with ISO 19932-1:20XX.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document.
ISO 5681:2020, Equipment for crop protection — Vocabulary
1)
ISO 19932-1:XXXX, Equipment for crop protection — Knapsack sprayers — Part 1: Safety and
environmental requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5681:2020 and
ISO 19932-1:20XX 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/
4 Test liquids and equipment
4.1 Water, clean and free from solids.
4.2 Preconditioning device, allowing holding of the sprayer and the operation of the lever-operated
knapsack sprayer pump lever continuously. The stroke and frequency shall be adjustable. An example is
given in Annex A.
1) Under revision
1
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
4.3 Shut-off device test equipment, consisting of a frame to fix the hand-held part of the shut-off
device and a unit for moving the shut-off device control, e.g. valve lever, to open it periodically with an
induced flow at the prescribed rate and pressure. The stroke shall be adjustable. An example is given in
Annex B.
4.4 Strap test device, capable of dropping the sprayer, vertically guided, onto each strap from a
height of 200 mm using a horizontal restraining bar that is 75 mm in diameter. The device is to be
capable of testing sprayers with one or two upper and/or lower fixing points. An example is given in
Annex C. Other devices with equivalent performance can be used.
WARNING — This test device presents an element of risk when the test is underway. All
personnel shall either be kept out of the test area or otherwise protected from hazards such as
parts displaced from the sprayer on test.
4.5 Drop test device, to drop the upright sprayer, vertically guided, from a height of (600 ± 20) mm
onto a flat level surface, 800 mm × 800 mm × 50 mm in height, made of high-density polythene (HDPE)
or hard wood placed on a flat level floor. The device shall not affect the impact force of the dropped
sprayer. An example is given in Annex D. Other devices with equivalent performance can be used.
4.6 Filling device, by which the volume and flow of water or test liquid can be controlled and
adjusted. An example is given in Annex E. Other devices with equivalent performance can be used.
4.7 Weighing devices, with the ability to weigh up to:
a) 50 kg with a maximum error of ±10 g;
b) 2 kg with a maximum error of ±0,1 g.
4.8 Measuring cylinder, for measuring volumes of up to 1 l with a maximum error of ±10 ml.
4.9 Timer (stop watch), with a maximum error of ±0,5 s for measuring periods up to 5 min.
4.10 Pressure supply device, to place the sprayer under pressure using air or water. The pressure
shall be adjustable up to 15 bar with a maximum error of ±5 % of the measured value, except when
measuring engine-driven sprayers when it shall be adjustable up to 50 bar with a maximum error
of ±5 % of the measured value.
4.11 Pressure gauges, to measure the pressure with a maximum error of 5 %.
4.12 Polythene bags, the size of which shall be at least 30 cm × 40 cm.
4.13 Polythene sheets, the size of which shall be at least 2 m × 1 m.
5 General
5.1 Test conditions
The tests shall be performed with one new specimen of the sprayer type at an air temperature of 10 °C
to 30 °C and relative air humidity of at least 30 %, with no influence of wind or sunlight.
5.2 Sprayer
Assemble the knapsack sprayer in accordance with the instruction handbook. Inspect for tightness of
the filling cap, gland nut and other operator-controlled couplings. Weigh the complete empty sprayer
using a weighing device according to 4.7 a) and record the mass in kilograms.
2
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
5.3 Functional tests
5.3.1 Shut-off device reliability
Detach the shut-off device assembly with the spray lance from the sprayer and mount it on a frame
according to 4.3. Connect the shut-off device to a pressurized water supply of (3 ± 0,2) bar. Fully activate
the shut-off device using a frequency of (15 ± 5) cycles/min for a total duration of 25 000 cycles. Inspect
functionality and record any leakage occurring within 1 min ± 5 s after completion of the last cycle.
5.3.2 Spray liquid output
The spray liquid output rate, q , of the sprayer for each nozzle supplied for use with the sprayer shall
m
be measured with a maximum error of ±1 % at the optimum spray pressure specified in the instruction
handbook or at the setting specified in the instruction handbook. Record the spray liquid output and
calculate the percentage deviation, σ, from the values, q , specified in the instruction handbook using
s
Formula (1):
()qq−
ms
σ = ×100 % (1)
q
s
5.3.3 Load carrying straps and their fixation points
WARNING — This test has an element of risk. All personnel shall either be kept out of the test
area or otherwise protected from hazards such as parts displaced from the sprayer on test.
Fill the spray tank with water so that the total mass of the sprayer is 7 kg ± 100 g. If the empty mass
of the sprayer is over 7 kg the test shall be carried out with the sprayer empty and if the maximum
mass of the sprayer filled to the nominal volume is below 7 kg record the mass and test at this mass.
Attach the sprayer to a strap test device according to 4.4 so that each load carrying strap can be tested
individually. From the position where the sprayer is carried by a strap in the device, lift the sprayer
vertically (200 ± 20) mm and let the sprayer drop. Repeat this 10 times for each load carrying strap.
Inspect for and record any damage.
5.3.4 Stability
Position the empty sprayer on a flat hard surface with an incline of 8,5° ± 0,2° so that the load carrying
straps are facing down the slope. Set any lever and the lance in the park position specified by the
manufacturer. If there are no park positions, set the lever in its highest position with the lance down
the slope.
Check the stability of the sprayer by rotating it at 90° intervals.
Repeat the test with the spray tank filled to the nominal volume.
Record any position in which the sprayer does not remain upright without being touched.
5.3.5 Contents gauge scale and total volume
Place the empty sprayer in an upright position on a flat horizontal surface with any lever in the park
position.
Measure and record the volume between the graduations on the spray tank contents gauge scale when
filling the spray tank using a measuring cylinder according to 4.8 or using a device according to 4.7.
Continue until the spray tank is filled to its nominal volume.
3
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
Determine the scale error, E, in percentage using Formula (2):
VV−
sm
E= ×100% (2)
V
s
where
V is the volume according to the spray tank scale, in millilitres (ml);
s
V is the measured volume of water filled into the spray tank, in millilitres (ml).
m
As a second part of the test, fill the spray tank to the upper edge of the filling opening.
For lever-operated sprayer and engine- or motor-driven sprayers, insert the filling strainer and close
the tank lid.
For compression sprayers, insert and tighten the air pump and remove all liquid from an integrated
filling funnel. If the filling opening is situated below any parts of the spray tank, so that air pockets
are formed, remove the hose and fill the sprayer through the spray tank outlet opening with air pump
mounted.
Weigh the sprayer using a device according to 4.7 a).
Determine the total volume, V , by the difference between the mass of the completely-filled sprayer and
t
the mass registered in 5.2.
Calculate the additional volume, V , of the spray tank in percentage using Formula (3):
A
VV−
t n
V = ×100% (3)
A
V
n
where V is the nominal volume.
n
5.3.6 Filling rate
This test shall be carried out on a complete sprayer, empty at the start of the test, as described in 5.2.
Wash all external surfaces of the sprayer with a non-ionic surfactant aqueous solution of 0,5 % and then
dry them.
Put any lever and spray lance in the park position. Remove the spray-tank lid or the air pump, as
appropriate, but keep the filling strainer in position.
Position the sprayer in the centre of a polythene sheet according to 4.13.
Position a filling device according to 4.6 with its outlet placed 100 mm ± 5 mm above the filling opening.
The sprayer shall be positioned with its straps opposite to the filling device with the line connecting the
upper strap fixing points orientated perpendicularly to the axis of the filling device (see Annex E). The
impact point of the test liquid shall be the middle of the filling opening.
Fill the filling device with a volume of water to its maximum volume without overspill.
Pour a volume of water that equates to the nominal spray-tank volume from the filling device into the
filling opening of the sprayer to simulate filling of the sprayer. The flow rate from the filling device shall
be such that the nominal tank volume will be poured within 60 s with a maximum flow rate deviation
of 10 %.
Wipe off any external residues on the sprayer with a tissue. Determine the amount of splashes as the
mass of the collected splashes on the polythene sheet according to 4.13 and the tissue, considering their
tare, using a weighing device according to 4.7 b).
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oSIST prEN ISO 19932-2:2022
ISO/DIS 19932-2:2022(E)
5.3.7 Emptying
This test shall be carried out on a complete sprayer, empty at the start of the test, as described in 5.2.
Fill the sprayer with water to its nominal volume. Drain the sprayer in accordance with the instruction
handbook. Fill the sprayer again and drain according to the instruction handbook and then weigh it
using a weighing device [4.7 a)].
Determine the amount of liquid remaining in the sprayer as the difference between the mass of the
drained sprayer and the mass recorded before it was filled with water.
5.3.8 Absorbency of harness
This test shall be performed with relative air humidity of 50 % to 70 %.
Dismount the carrying straps with padding and remove any metal or plastic parts attached to them
before immersion (in order to minimize, as far as possible, the dry mass of the straps) and weigh them
dry using a weighing device according to 4.7 b). Completely immerse the straps in water for 2 min.
Remove the straps from the water, shake off surplus liquid and hang freely from one end to drain for
10 min before re-weighing.
Calculate the mass increase, Δm, using Formula (4):
Δmm=−m (4)
ab
where
m is the mass before the test;
b
m is the mass after the test.
a
Calculate the relative mass increase, Δm , using Formula (5):
r
Δm
Δm =×100 % (5)
r
m
b
5.4 Pressure test
WARNING — This test has an element of risk. All personnel shall either be kept out of the test
area or otherwise protected from hazards such as parts displaced from the sprayer on test.
Lever-operated sprayers and compression sprayers to be tested shall first have been subjected to the
drop test (see 6.2).
Fill the spray tank with water to its nominal volume. Connect the outlet of the shut-off device to an
external pressure supply device according to 4.10.
Lever-operated sprayers and engine or motor-driven sprayers are tested with the spray-tank lid
removed from the filling opening. Compression sprayers are tested with the spray-tank closed using air
pump and lid, if part of original equipment of the sprayer.
Raise the pressure until the pressure relieve valve opens or the pressure level is two times the specified
maximum working pressu
...