BS EN ISO 21853:2020 pdf free.Kite boarding – Release system – Safety requirements and test methods.
4.4 Handling 4.4.1 General It shall be possible to trigger the main release system by a first single action. It shall be possible to trigger the disconnecting release system it by a second single action.  The action for triggering shall be ergonomically and kinematically suitable for the physiological movements of the user. It should be possible to trigger the main release system/disconnecting release system with garments, e.g. gloves.  4.4.2 Triggering force The force to perform the act of triggering shall be≥20 N and≤170 N. Test in accordance with 5.6.1 in relation to certain conditions (see 5.6.3.1, 5.6.3.2, 5.6.4, 5.6.5 and, if appropriate, 5.6.6). The release system shall not show signs of plastic deformation or of having been affected by the tests in any way that could provoke malfunction.4.4.3 Release force It shall be possible to trigger the main release system and/or disconnecting release system with one hand only, without any load simulating the pulling force of the kite. Test in accordance with 5.5.2. 4.4.4 Duration of release The main release system and/or disconnecting release system shall be triggered in≤2 s. Test in accordance with 5.6.14.4.5 Reachability It shall be possible to trigger the main release system and/or disconnecting release system with either of the user’s hands as described in the user’s manual. The connection points should not be on the back of the user. 4.5 Behaviour during release All parts of the main release system and/or disconnecting release system designed to disengage as intended by the manufacturer, by the act of triggering, shall disengage (force generated by kite reduced or cancelled).  The disconnecting release system shall further disconnect the user from the kite. Test in accordance with 5.6. 4.6 Additional requirements for cold and wet conditions If the release system is designed to be used in cold and wet conditions, it shall be able to trigger the main release system and/or disconnecting release system in extremely cold and humid conditions, as defined in the test conditions. NOTE Cold and wet conditions are related to snow kiting or other icy condition in which the user is likely to wear gloves or other garments. Test in accordance with 5.6.6.BS EN ISO 21853 pdf download.