IS0 5682-3:1996 pdf download – Equipment for crop protection – Spraying equipment – Part 3: Test method for volume/hectare adjustment systems of agricultural hydraulic pressure sprayers.
1 Switching on and off the nozzle lines 5.1.1 Set the sprayer to the conditions specified in 4.2.2. Switch on the nozzle lines and make the measurements simultaneously. 5.1.2 Set the sprayer to the conditions specified in 4.2.2, then lower the driving speed to I,5 m/s and reduce the PTO rotational frequency to 300 min-1. Switch on the nozzle lines and make the measurements simultaneously. 5.1.3 Set the sprayer to the conditions specified in 4.2.2, then raise the driving speed to 2,5 m/s and raise the PTO rotational frequency to 500 min-1. Switch on the nozzle lines and make the measurements simultaneously. 5.1.4 Successively switch off boom sections except one, then switch them on again. Make the measurements simultaneously. 5.2 Speed variations 5.2.1 Power take-off (PTOI rotational frequency Change the PTO rotational frequency from at least 300 min-1 to 400 min-1 and then to 500 min-1 and then from 500 min-1 to 400 min-1 and then 300 min-1 in stages of five seconds each. Make the measurements simultaneously. 5.2.2 Driving speed Set the driving speed to at least I,5 m/s, 2 m/s, 2,5 m/s, 2 m/s, I,5 m/s and make the measurements simultaneously. 5.3 Resetting the volume/hectare rate Measure the volume/hectare rate as described below and calculate the coefficient of variation in accordance with clause 6. The equipment is operated at PTO rotational frequency of 500 min-1 and a driving speed of 2 m/s. Make the following two series of measurements seven times.
Set and operate the equipment at a volume/hectare rate of 100 l/ha, or the next highest value, then successively set it to 200 l/ha, 300 I/ha and 400 I/ha [Ist series of measurements (ascending)]. Set to 500 l/ha, or the next lowest value, then successively set it to 400 l/ha, 300 I/ha and 200 I/ha [2nd series of measurements (descending)]. Make measurements at volume/hectare rates of 200 l/ha, 300 I/ha and 400 I/ha for the ascending series and at 400 l/ha, 300 I/ha and 200 I/ha for the descending series respectively. When setting the volume/hectare rates, be careful not to exceed the required value to be set and to have to adjust the volume/hectare rate in the opposite direction. NOTE – If tables, diagrams or the operator’s manual, provide for a volume/hectare rate of less than 150 I/ha or greater than 450 l/ha, at a driving speed of 2 m/s, then both series of measurements should be reset to 150 I/ha or 450 l/ha.