Principle of viscotherm is that in a laminar flow the drop of pressure fluid is directly proportional to the drop in pressure. A sample of fuel is pumped through a capillary tube at a constant rate . Tapping points are provided so that the pressure difference can be measured using a differential pressure gauge.the gauge is calibrated directly in terms of the viscosity. a differential pressure transmitter is provides a signal and controls the fuel heating.
fuel quality setting, engine operator can manually adjust the adjusting timing to quality of fuel.
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