| 摘要 |
A liquid such as a herbicide is delivered from spray nozzles (4) on a boom (2). The herbicide is supplied from a herbicide container (8) by a pump (18), and is diluted with water supplied from a tank (10) by a pump (12). The speed of the herbicide pump (18) is controlled by control means (22). The volumetric output of the pump (18) is calibrated by supplying the herbicide to a graduated calibration vessel (32) during a test cycle at which the pump (18) is run at a speed corresponding to a predetermined delivery rate, for a predetermined time. Correction factors can then be input to the control means (22) in order to bring the volumetric output of the pump (18) into line with desired flow rates. <IMAGE> |
