The rotameter is installed in the water circuit of the trainer. The rotameter float is housed in a glass conical tube which opens out in the direction of flow. The flow resistance of the float causes it to be subjected to an upward force. This force counteracts the downward gravitational force of the float. The float moves vertically until equilibrium is established between the two forces. The flow rate is read from the scale by way of the resultant position of the float.
Learning Objectives / Experiments
Familiarisation with the principle of operation
Flow measurement
Plotting a pressure loss curve
Cmparison with other flow meters
Specification:
Rotameter as accessory for flow meter trainer
Glass conical tube through which flow passes
Flow rate readable on scale via position of float
Connections to facilitate pressure loss measurement with the flow meter trainer