Rotameter experiment. The Basics of Rotameters 2019-01-12

The Basics of Rotameters

Add to My Quote For use by all kinds of engineering students, the Flow Meter Calibration apparatus compares and shows the accuracy and use of fundamental flow meters. Flow rate is indicated by a pointer on an indicating scale by means of a magnet inside the float, magnetically linked to the pointer. This is done to reference the operating conditions to those at calibration of the rotameter. Each flow measurement product offers an experiment to investigate the performance of the flow meter, to calibrate the flow meter and conduct an analysis of the meters accuracy and error. Typical accuracy ±2% to ±10% F. The P6108 Rotameter is intended to be permanently mounted on the Hydraulics Bench strapped to the front left hand leg of the bench frame.

Metal Tube Water Flow Flow Measurement Rotameter Experiment

Ensure that any air bubbles are bled from the manometer. Raise the swivel tube of the outlet tank so that it is close to the vertical. With a glass tube meter, the principal metering elements float and tube as well as the fluid being metered are clearly visible. Metal tube, to 900°F; glass tube, to 250°F; plastic tube, to 150°F Scale. Liquids up to 200 cP Rangeability. Measure the slope of the line and hence determine the coefficient of discharge for the meter. The regulator may optionally be specified as part of an integral assembly with the meter.

FLOW METER CALIBRATION

Manometer Initially use two of the single manometer tubes. Alternatively, you can specify fluid-specific gravity, which is the ratio of the fluid density to the density of water in the case of a liquid or to that of air in the case of a gas , at a specified temperature. Many types of gas analyzers require a controlled, small rate of sample flow into the analyzer. Measure the flow rate using the volumetric tank and a stop watch. The goal was to determine if there were any differences in preferences, performance, and ease of use between students gathering data in the Web Lab and Wet Lab.

Rotameters—Variable Area Flow Meters Tech Info from Cole

Measuring liquid water flow rates from 0. The materials of construction include stainless steel, glass, metal, and plastic. Roger Gilmont's extensive 30 year research we are able to correlate flows using a unique data analysis program which can correct for specific operating conditions. The Turbine meter should be used on the top of the Hydraulics Bench and should be connected to either the P6103 Constant Head Inlet Tank or the P6105 Feedblock. One such program can be downloaded from see Screen 1. The optional Pitot Tube Flow Meter H40a will also show the velocity profile in a pipe. This is determined by a factor known as the viscosity immunity ceiling, which relates to the actual viscosity in centipoises and the liquid's operating density.

Rotameters—Variable Area Flow Meters Tech Info from Cole

Establish a water flow and bleed the manometer. The bearings on heavy, rotating equipment require continuous, forced lubrication to extend their functional life and reduce machine downtime. Test Section P6227 Venturi Meter Assembly Outlet P6104 Variable Head Outlet Tank. The total pressure sensed by the pitot manometer is thus : Measurement of the static pressure P is made by tappings at right angles to the flow drilled radially through the outer wall of the pitot-static tube into the annular space as shown in the diagram. Measure the flow rate using the volumetric tank and a stop watch. Bubble Tube Purge for Density Measurement. Equipment Preparation Prepare the equipment to the following specification Inlet Initially P6103 Constant Head Inlet Tank replaced by P6105 Feedblock.

The Basics of Rotameters

A ramp function in process controller was used to control the flow rate of the circulating fluid. Programmability allows designers to specify the logic they want, instead of merely settling for what is available. Use in an Orifice Bypass To cost-effectively handle larger flow rates of liquids or gases, a rotameter can be installed in a bypass line around an orifice plate. Calibration can be direct reading in terms of a specific gas or liquid, or a graph that plots meter readings vs. Plot both of these errors against flow rate. Students thought that the Web-based environment was suitable for gathering data and writing a report.

P6227

This information is a must for gas applications. The downstream bore of each orifice is chamfered at 40º to provide an effective orifice plate thickness of 0. If you prefer a metal tube, all you need do is click on Metal Type on the screen. In operation it is essential that the float should not touch the sides of the tapered tube, otherwise erroneous readings will occur. Easy to install and maintain.

FLOW METER CALIBRATION

General Correction Equations As you can see from these equations, a pressure increase of 50 psig will more than double the flow rate indicated by the float height in a rotameter. These do not require vertical mounting, but corrosive or erosive fluids can damage the spring and lead to reduced accuracy. A very common method of measuring flow rate requires the creation of a differential pressure across an orifice plate installed in the flow line see Figure 3. This shows if the float is stuck since it will only rotate if it is free. With this in mind, many simple factors influencing flow meter performance are easily understood. Plot a graph of this area against flow rate.