CONFORMITY OF MANOMETERS USED ON AGRICULTUR AL SPRAYERS

• Autor(a) principal: Dornelles, Marçal Elizandro
• Data de Publicação: 2012
• Outros Autores: Schlosser, José Fernando, Casali, André Luis, Noller, Dirceu, Farias, Marcelo Silveira de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Engenharia na Agricultura
• Texto Completo: https://periodicos.ufv.br/reveng/article/view/237
• topic: máquinas agrícolas; pressão; tecnologia de aplicação.

The manometers are important to calibrate agricultural sprayers in order to supply hydraulic pressure required by the kind of spraying nozzles, solution volume and agrochemical used. This study was done to evaluate these devices using five parameters: Operational conditions, external diameter, pressure accuracy, glycerin level in manometers and duration of use on sprayers. Thirty six sprayers were eavluated on-farm through random on-site visits. The results showed mean duration of 16 years of use of sprayers, 8% were without manometers, and more than 30 % had damaged manometers. Among the manometers in good operational conditions (61.1 %), only 31 % had good pressure accuracy (± 10 %). Thus, only seven (19.4%) sprayers equipped with manometers were fit for use.