ISO 21191-2021 pdf free.Equipment for crop protection – Closed transfer systems (CTS)- Performance specification.
5 Performance requirements
5.1 Leakage
5.1.1 General
When operating CTS equipment, in accordance with the manufacturers operating instructions, there shall be no observable leaks from the container, CTS, the interface between them including any associated connections, measuring or control devices when tested according to JA. One sample of each adaptor/interlace available from the CTS manufacturer shall be supplied with the CTS tested.
5.1.2 Principle
This test is conducted while the CTS is being used to connect, open, empty, measure (where measurement devices are present) and rinse the container and CTS. The test uses a 0,1 % solution of a stirfactant in water with the addition of a fluorescent dye to disclose any leaks at the relevant stages of operation.
5.1.3 Apparatus
5.1.3.1 System leakage test formulation, specified in Annex C. A similar dye that fluoresces under the ultraviolet light specified in 5.1.3.6 can be substituted.
5.1.3.2 Test container, the maximum size container with which the system is designed to operate and specified in the CTS manufacturer’s manual.
5.1.3.3 The CTS to be tested shall be prepared to operate as determined by the manufacturers’ operator instructions for installation and use.
5.1.3.4 The pipe/hose supplying the rinsing water to the CTS shall be fitted with a pressure indicator
and any pump or other means of assisted dispense shall be fitted with a crop sprayer pressure gauge.
Sprayers shall be fitted with a pressure indicator, the accuracy of which shall be
— ±0,2 bar for working pressures between 1 bar (included) and 8 bar (included),
— ±0,5 bar for working pressures between 8 bar and 20 bar (included), and
— ±1 bar for working pressures more than 20 bar.
The pressure indicator shall be clearly readable. The pressure indication shall be stable. The scale of the pressure indicator shall be marked as follows:
— every 0,2 bar for working pressures less than 5 bar;
— every 1,0 bar for working pressures between 5 bar (included) and 20 bar (included);
— every 2,0 bar for working pressures more than 20 bar.
5.1.3.5 Ultraviolet disclosing goggles or filter with yellow lenses, to protect the eyes of the test operator and to enhance visibility of Liv fluorescence.
5.1.3.6 An ultraviolet light source: High output LED flashlight, with a wavelength of 385 nm to
400 nm and a minimum UV-A intensity of 10 000 iW/cm2.
5.1.3.7 Potable water and disposable wipes for dye removal.
5.1.3.8 An absorbent sheet able to collect all splashes and leakages placed on ground under the CTS to be tested. The dimension should he able to collect splashes and leakage from the CTS and connection to the application equipment.
5.1.4 Procedure
5.1.4.1 Load the test formulation to the nominal volume of the container (5.1.3.2). Thoroughly clean all external surfaces of the product container and CTS using the ultraviolet dye removal materials specified in 5.1.3.7. Scan all surfaces of the product container and CTS with the UV light source and remove any disclosed areas using the dye removal materials to ensure no dye is visible.
5.1.4.2 The operator shall ensure to use a coverall and gloves that are not contaminated with the test formulation. These can be tested using the UV light source In a dark room before and after the test. Connect the filled container prepared as specified in 5.1.4.1 to the CTS. Transfer the test formulation into the CTS to be tested in accordance with the CTS manufacturer’s instructions including the measuring device if fitted.
5.1.4.3 Immediately upon completion of the actions in 5J.A2 and with the connections to the container and CTS fully engaged and connected, blackout all windows and turn off all other light sources to the point that no visible light enters the room then use the UV light source to inspect all external surfaces of the container, CTS and associated connections. Using the appropriate yellow tinted spectacles/filter, observe the surfaces for evidence of leakage. Record any leakage in a test report (see example in Annex D).
5.1.4.4 Operate the container rinsing device of the CTS as detailed in the manufacturers’ operator manual to achieve the internal rinsing of the container and internal rinsing of the CTS as specified in 52. Use the UV light source to inspect all external surfaces of the product container. CTS and associated connections.ISO 21191 pdf download.