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1、INTERNATIONAL STANDARD d!?J?m %ItlteYnat IXBC sect IS0 5682-3 First edition 1996-l 2-l 5 Corrected and reprinted 1997-07-01 Equipment for crop protection - Spraying equipment - Part 3: Test method for volume/hectare adjustment systems of agricultural hydraulic pressure sprayers MatGel de protection
2、des cultures - i?quipemen t de pulvkisa tion - Partie 3: MBthode d essai des syst 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 568
3、2-2:1986, 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
4、 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) ro
5、tational 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
6、 stop-watch used for the tests shall meet the specifications of IS0 5682-1 :I 996, 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 me
7、an 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. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972
8、545001 Not for Resale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 IS0 5682-3:1996(E) 5.1 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 simul
9、taneously. 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 r
10、aise 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.
11、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 drivi
12、ng 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 rot
13、ational 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 measurement
14、s (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
15、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
16、 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. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Res
17、ale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 5682-3: 1996(E) 6 Calculation For each setting the coefficient of variation, CV, expressed as a percentage, is calculated as follows: cv = ;x100 where s is the standard deviation: s= CCxisxJ2 I- n-
18、l x is the mean volume/hectare rate: c xi XC- n xi is the ith value of volume/hectare rate; i = 1, 2, . . . . . n is the measurement index (n = 7). The largest and smallest deviations, 6, and 6,i, respectively, expressed as percentages, are calculated as follows: 6 Xmax -x max = xl00 x 6min = xmi- X
19、 100 The mean deviation, A, expressed as a percentage, between mean volume/hectare rate, X , and nominal volume/hectare rate, xnom, is calculated as follows: - A= X -%om xloo Xnom 7 Test report The results shall be presented in a test report, of which an example is given in annex A. 4 Copyright Inte
20、rnational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,- Annex A (informative) IS0 5682-3:1996(E) Model test for volum
21、e/hectare adjustment systems of agricultural hydraulic pressure sprayers in accordance with IS0 5682-3:1996 A.1 Duration(s) for which the mean volume/hectare rate deviates by more than 10 % from the mean volume/hectare rate in the steady state A.l.l Switching on and off the nozzle lines Values in se
22、conds IS0 5682-3:1996, subclause 1 st measurement 2 nd measurement 5.1 .I 5.1.2 5.1.3 5.1.4 A.l.2 Speed variations Values in seconds I IS0 5682-3:1996, subclause 1 st measurement 2 nd measurement I I I I 5.2.1 I I I I 5.2.2 I Copyright International Organization for Standardization Provided by IHS u
23、nder license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 5682-3: 1996(E) A.2 Volume/hectare rate (IS0 5682-3:1996, subclause 5.3) Values in litres per hectare I Ascending ser
24、ies I Descending series Parameter Mean, X Standard, s Coefficient of variation, CV Largest deviation, 6, Smallest deviation, 6,i, Mean deviation, A 6 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for
25、 Resale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 5682-3:1996( El ICS 65.060.40 Descriptors: agricultural machinery, crop protection, crops treatment equipment, sprayers, agricultural sprayers, adjusting systems, tests. Price based on 6 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 01:28:12 MDTNo reproduction or networking permitted without license from IHS -,-,-