ISO 5682-3:1996 pdf download – Equipment for crop protection – Spraying equipment”
1 Scope
This part of ISO 5682, specifies the test method for volume/hectare adjustment systems of sprayers in order to assess precision of spraying and performance. It applies to mounted, trailed or self-propelled agricultural hydraulic pressure sprayers used for protection and/or fertilization of crops.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 5682. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 5682 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 5681:1 992, Equipment for crop protection – Vocabulary.
ISO 5682-l :I 996, Equipment for crop protection – Spraying equipment – Part 1: Test methods of sprayer nozzles.
ISO 5682-2:1986, Equipment for crop protection – Spraying equipment – Part 2: Test methods for hydraulic sprayers.
3 Definitions
For the purposes of this part of IS0 5682, the definitions given in IS0 5681 and the following definition apply.
3.1 volume/hectare adjustment system: Device which allows application, in liquid form, of a predetermined
constant volume per hectare treated, of protection and/or fertilizing spray mixture independent of variation in the forward driving speed.
NOTE – The different systems are classified as follows:
1) system controlled by the rotation of a power take off (PTO);
2) system controlled by the rotation of a land wheel;
3) system controlled by any other means.
4 Test conditions and apparatus
4.1 General test conditions
The general test conditions shall be those specified in IS0 5682-2:1986, clause 6, and the specific conditions given in 4.2.
4.2 Specific test conditions
4.2.1 All measurements of the volume(hectare rate are carried out at the spray boom or nozzle carrier using water as the test liquid. Measuring and recording shall continue until the system returns to a steady state condition.
4.2.2 At the start of the measurements defined in 5.1 and 5.2, the following conditions shall be set on the sprayer:
– driving speed: 2 m/s;
– power take-off (PTO) rotational frequency: 400 min-1;
– volume/hectare rate: 300 I/ha.
In case of other travelling speeds, nominal (PTO) rotational frequencies (for example 1 000 min-1) or non PTO drives, rotational frequencies analogous to 540 min-1 are valid.
4.2.3 If hydraulic driven pumps are tested when integrated in the sprayer, variation of the speed (5.2) is not necessary.
4.3 Test apparatus
The standard pressure gauges and the stop-watch used for the tests shall meet the specifications of ISO 5682-1 :1996, clause 5.
5 Test procedure
The measurements shall be made under the conditions specified in 4.1 and 4.2 together with the conditions specified in 5.1, 5.2 and 5.3. Measure continuously the duration(s) for which the mean volume/hectare rate deviates by more than 10 % from the mean volume/hectare rate in the steady state. The measurements in 5.1 and 5.2 shall be repeated twice.