This part of ISO 16122 defines the general requirements to be fulfilled for the inspection of all types of sprayers for plant protection products used in agriculture, horticulture, forestry and other areas, except knapsack sprayers. NOTE 2 For knapsack sprayers, see ISO 19932–1 and ISO 19932–2. The specific requirements for the different types of sprayers are defined in the relevant specific parts of ISO 16122. When used in conjunction with the relevant sprayer specific part (see Annex A), this part of ISO 16122 specifies the requirements and test methods for the in use inspection of sprayers. The requirements relate mainly to the condition of the sprayer with respect to potential risks for the environment and its performance to achieve a good application. This part of ISO 16122 also includes minimum requirements for the preparation of the sprayer for the inspection and the minimum safety requirements with respect to the safety of the inspector (test operator) during the inspection.