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APPLIED FLUID MECHANICS

C9 Flow Meter Demonstration Unit- Issue 10

The Armfield Flow Meter Demonstration Unit is a self-contained facility designed to demonstrate the important characteristics of sixteen types of flow meter used in the measurement of water flow through pipes or open channels. Equipment purchase can be configured to suit the course being followed (see Meter Selection Chart).

ORDERING SPECIFICATION

• A self-contained apparatus to demonstrate the characteristics of flow meters used in measurement of water flow through pipes or open channels.

• Service module with reservoir, volumetric measuring tank and pump.

• Reference turbine flowmeter permanently fitted.

• Metering devices available in various combinations to suit coursework.

Selection from fourteen devices:
- Venturi
- orifice
- Pitot
- shunt gapmeter
- swinging flap
- volumetric rotary piston
- electromagnetic
- helical rotary
- inferential multistream
- current meter
- broad crested weir
- Crump weir
- 'H' flume
- Washington flume

• Quick and easy removal of test meters for evaluation and inspection

• Air entrainment facility

• Meters can be used independently to support research or student project work.

• User instruction manual provides installation, commissioning and maintenance data, together with project exercises.

Demonstration Capabilities

> comparing the use, application and limitations of various types of flow meter
> considering the implications on flow meter selection of performance, accuracy, convenience, cost and head loss
> understanding the principles on which different types of flow meter are based
> relating pressure drop across a flow meter to flow rate
> using manometers to measure pressure drop
> investigating the effect of air in the hydraulic stream on flow meter performance
> understanding the application of Bernoulli's Theorem

Description

The Armfield Flow Meter Demonstration Unit is self-contained, the main elements are a service module and flow meter support stand.

A self priming centrifugal pump draws water from the sump tank in the service module and delivers it to a flow meter test pipe. Industrial type flow meters mounted in test sections can be fitted into the test pipe quickly and easily. These meters have been chosen to give a variety of different metering principles and degrees of sophistication and accuracy. Some of the meters are calibrated directly in units of flow, whilst others involve the use of calibration charts.

The pressure drop across each of the flow meters can be measured by using either the 0.5 metre pressurised water manometer or the 1 metre mercury manometer supplied. Ported manometer connection valves ensure rapid bleeding of all manometer pipework. The facility exists to admit air into the hydraulic stream to demonstrate the effect on the meter's accuracy. The discharge from the test section is controllable and is fed through a diffuser into the channel of the GRP service module, into which a 'Vee' Notch and Rectangular Notch Weir can be fitted.

An auxiliary channel (C9-15) accommodates the Broad Crested and Crump Weirs also the 'H' Flume and Washington Flume. Levels in the channel can be determined by using the hook and point gauge.

Water discharging from the flow meter on test is collected in a volumetric tank where the flow may be determined absolutely. This tank is stepped to accommodate high or low flow rates and incorporates a stilling baffle to reduce turbulence. A remote sight tube and scale connected to a tapping in the base of the volumetric tank allow an instantaneous indication of water level. Water is returned to the sump tank by a dump valve. The basic system incorporates a reference flow meter which has been chosen for reliability and accuracy. This meter remains installed whereas other meters are selected from their storage position on the apparatus and tested as desired.

In addition to being a valuable teaching aid, the apparatus brings to the laboratory a selection of instruments that can be used to support student project work. A full set of instructions is provided, including details for testing and comparison of flow meters.

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Technical details

Maximum flow rate: 2.3 litres/s
Reservoir capacity: 140 litres
Volumetric tank capacity: 40 litres
Nominal bore of pipework: 38mm
Length of removable test pipe: 750mm
Pump motor rating: 0.55kW

Optional Accesssories

For installations where the use of Mercury is undesirable or prohibited a digital pressure meter is available, ask for data sheet:

H12 MANOMETERS AND PRESSURE METER.

TOXIC MATERIALS
Due to international restrictions limiting the transport of toxic materials, we do not include mercury in our supply.

Recommended Instruments

Stop watch

Complementary Products

C1: Compressible Flow Bench
C2: Subsonic Wind Tunnel
C3: Multi-pump Test Rig
C4: Multi-purpose Teaching Flume
C6MkII: Fluid Friction Measurements
C7: Pipe Surge & Water Hammer
C10: Laminar Flow Analysis Table
C11: Flow in Pipe Networks
F1-10 Hydraulics Bench and Accessory F1-21 complete with F1-21-301 Computer Aided Learning Software (Windows™)

Requirements

Electrical supply:

C9-(00/20/21/22/23)-A: 220-240V/1ph/50Hz@10A
C9-(00/20/21/22/23)-B: 120V/1ph/60Hz@20A

Water supply:

Initial fill with clean water

Shipping specification

Gross weight 400kg
Volume 3.0m³

Overall dimensions

Height: 1.50m
Width: 3.50m
Depth: 1.00m

Extended 2 year Warranty on all Armfield Products

DATA SHEET

PRODUCT CATEGORY:
Engineering Education