Advance Dead Weight Apparatus
Experiments
Calibrating a Bourdon type pressure gauge.
Calibrate manometers, read off applied pressure
Determine systematic errors
Working principle of a Bourdon tube pressure gauge
principle of operation and working with a piston manometer
Specification
Bourdon tube pressure gauge for pressure measurement
Hydraulic load mechanism with storage tank and bleed mechanism
Hydraulic oil for transfer of the force
Accurately fitting piston and cylinder of the piston manometer without seals
Technical Data
Piston
Material of Piston: Stainless Steel
Diameter of the Piston: 7mm
Area of piston: 38.46 mm2
Mass of piston: Approx. 1kg
Ancillary masses: 10x 5 kg
Pressure Gauge
Type: Bourdon Tube
Range: 0~140 bar/0~2000psi
Graduation: 2bar/50psi
Scales: bar/psi
Software FM-1849-18ASW (optional)
DAQ software specially designed in National Instrument™, LABVIEW™ environment to measure and calculates the results of apparatus. The software is optional and while using software a set of electronic sensors are included. Software can be run with any Windows™ environment.
Scope of Delivery
1 experimental unit, 1 set of weights, 1 oil approx. 500ml, 1 instruction manual
Category: Fluid Mechanics Products
Calibration is a process for detecting deviations in a measuring instrument compared to a reference instrument or universally accepted standard value. This observed deviation is taken into account in the subsequent use of the calibrated measuring instrument and adjusted if necessary.
Dead Weight Pressure Calibrator is a device designed as an introduction to the basics of checking and calibrating a manometer (Pressure gauges/transmitter).
Dead Weight Pressure Calibrator apparatus consists of a precision machined piston and cylinder assembly mounted on leveling screws. A Bourdon gauge is supplied for calibration. A defined force is applied by loading the piston with dead weights. The ratio of force / piston crosssectional area results in a defined test pressure. Hydraulic oil is used to transfer the force. If the pressure in the system rises, the force acts against the spring of the Bourdon tube pressure gauge. The test pressure that is produced can be read on the manometer’s dial. The Bourdon Tube mechanism of a pressure gauge working is clearly visible through the
transparent dial. Loading the calibrated piston manometer with weights produces a very accurate, reproducible calibration pressure, which can be used to check and calibrate the manometer. The weights supplied are added to the upper end of the piston rod which is rotated to minimize friction effects. The gauge is thus subject to known pressures which may be compared with the gauge readings and an error curve drawn.