BS ISO 10988:2011 pdf free download Equipment for crop protection — Knapsack motorized air-assisted sprayers — Test methods and performance limits
1Scope
This International Standard specifies the requirements,test methods and minimum performance limits forknapsack motorized air-blast (twin-fluid) sprayers and air-assisted centrifugal sprayers as defined in lS0 5681.
lt is applicable to those integrally powered knapsack sprayers, equipped with an engine and carried by theoperator, intended primarily for use in agriculture and horticulture (hereatfter referred to as “”sprayers”).
lt is not applicable to hydraulic pressure sprayers,thermal sprayers or cold foggers; nor is it applicable tosprayers adapted for the application of dry material.
lt addresses general operating parameters as well as the potential deposition of spray droplets underspecified controlled conditions. It does not deal with the safety of the operator in the use of the sprayers(see lsO 28139).
2Normative references
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies.For undated references,the latest edition of the referenceddocument (including any amendments) applies.
ISO 5681,Equipment for crop protection — Vocabulary
ISO 9357:1990,Equipment for crop protection —Agricultural sprayers — Tank nominal volume and filinghole diameter
ISO 19932-1:2006,Equipment for crop protection — Knapsack sprayers — Part 1:Requirements and testmethods
ISO 28139:2009,Agricultural and forestry machinery — Knapsack combustion engine-driven mistblowers —Safety requirements
3Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5681,ISO 19932-1 and IS0 28139apply.
4Requirements4.1General
Knapsack motorized sprayers shall be so designed that they can be safely used in accordance with theirintended purpose, achieve minimal exposure levels to the operator and avoid unnecessary waste of pesticidesinto the environment.
The sprayer shall be designed such that the liquid flow can be activated and switched off in accordance withlsO 28139:2009,5.6.6.
lt shall comply with the following requirements and shall meet the specifications in accordance withISO 19932-1 as applicable.
The sprayer with the tank filled at nominal volume shall be designed such that the operator shall be able topick it up, carry it and put it down in accordance with the instruction handbook and without any spillage.
lt shall have an adjustable and reproducible spray liquid output.
Any components of the sprayer subject to maintenance, as specified in the instruction handbook, shall bechangeable without special tools, unless these are provided with it.
The sprayer shall be designed such that the filled sprayer can be carried in the upright position.lt shall not be possible to displace any gasket or seal from its seated position by tightening.
4.2Material of construction
All components of the sprayer made from plastic and elastomers coming into direct contact with the spraysolution shall be capable of operating satisfactorily after the immersion test specified in 5.12.
4.3Straps and their fixation points
Straps shall be made of non-absorbent material.
The straps shall be adjustable in length to meet the needs of the operator while on the operator’s back. Eachstrap shall be adjustable to a length of at least 75 cm, as measured between the fixing points of each strap.The load-bearing width of the straps shall be at least 50 mm.
4.4Spray tank
In order to avoid chemical spillage during filling, the diameter of the filing opening shall be in accordance withISo 9357:1990,Table 1.
Hose nipples fitted to the tank shall be able to withstand a test force of (13± 1)N, so as to avoid unintentionaldisconnection.
The spray tank shall have a volumetric content gauge scale as specified in lSO 9357.The filling tank opening shall be fitted with a lid, which shall
-have a retainer,
be able to be opened and closed without the use of a special tool, and