The measured value of the slope of the graph (dT/dP)SAT obtained from the practical results can be compared with corresponding values calculated from the data in steam tables the German Physicist and one of the founders of Thermodynamics was instrumental in deriving the relevant Clausius-Clapeyron relationship. Marcet Boiler has been developed for investigating the relationship between the pressure and temperature of saturated steam, in equilibrium with water, at all pressures between atmospheric and 17 bar (250 lb/in²).
Features:
Boiler Lagged To Permit Rapid Heating And Arranged For Bench Mounting
Electrically heated boiler fabricated from heavy duty steel section
Supplied complete with safety valve, pressure gauge and water cock
Specimen cutting machine with sliding supports
Useful cutting height: 130 mm
The machine accepts blades up to dia. 400 mm
Blade rotation speed: 2800 rpm
Supplied without blade
Max. Tapping Capacity: M 10 M 20 M 30
Spindle Travel: 100 120 140
Spindle rpm: 600.1000.1500 Optional Optional
Motor HP: 1 2 3
Spindle Transmission: Lead Screw Lead Screw Lead Screw.
The air flow can be varied by regulating the butterfly valve situated at the blower outlet, and the flow rate calculated from the pressure drop across the blower inlet orifice as measured by the sloping manometer mounted against the back of the bench. The essential component of the apparatus is a large, stainless steel duct which is supplied with air from a small blower via a set of damping filters. A window is provided in the air duct to enable the various readings to be taken without disturbing the conditions inside. A further wet and dry bulb hygrometer of the aspirated type is provided in which the inclusion of an integral blower affords constant air velocity across the bulb. Instrumentation consists of two screen-type wet and dry bulb hygrometers, one giving a digital readout by means of thermistor probes and the other giving a direct readout via a glass thermometer. Finally, there are two further types of hygrometers included with the apparatus, the first being a hair hygrometer seen through the window and the second one being a Vaisala capacitance type instrument with digital readout shown on top of the bench. A sling hygrometer is included, to demonstrate a further, simple method of ventilation of the wet and dry bulb type.
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Power supplies:
0/ 15 Vdc, 1 A
0/+15 Vdc, 1 A
5 Vdc, 1 A
+15 Vdc, 1 A
+5 Vdc, 1 A
15 Vdc, 1 A
6, 0 ,6 Vac, 1 A
Features:
Voltage regulation and protection against over voltage or short circuit.
Complete with a set of connecting cables.
Interface board for connection to PC.
Robust structure and modern design.
Transparent mixing tank with 3 capacitive proximity switches to monitor the level
3 transparent measuring tanks, each with 2 capacitive proximity switches
Clearly laid out trainer as basis for the use of a PLC in a process control application involving mixing processes
Control of the 8 solenoid valves, the pump and the agitator also by PLC via lab jack panel
Capacitive proximity switches with adjustable sensitivity
Metering from the 3 measuring tanks into the mixing tank via solenoid valves
Mixing assisted by stirring machine in mixing tank
Power supply to all components and to PLC by built-in power supply unit
Proximity switch signals processed by PLC via lab jack panel
Closed water circuit with centrifugal pump and stainless steel storage tank.
It is used for grouping experiment of middle school student; it is used to explore and study conductivity ability of different electrolyte solutions, and used for the related experiment and demonstration of liquid conduction teaching.
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The unit includes a metal bar with additional sliding weights as a rigid pendulum. The suspension point can be adjusted at the knife edge bearing of the pendulum. The length of the thread pendulum included can be easily varied using a clamping device. The model is used to investigate the oscillation of pendulums. During this process a physical pendulum is compared with a mathematical pendulum. The model is suitable for student experiments. The components of the experiment are attached to a base plate intended for wall mounting.
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Pressure variations are made by the rotary vane pump which is provided with needle valves at entry and discharge. A further valve is incorporated at the pump outlet with pressure tappings either side of it to enable differential pressure measurements to be made and plugs are supplied to blank off any connections not in use. The apparatus consists of a series of pressure/vacuum measuring instruments mounted on a wheeled bench with an electrically driven rotary vane pump to provide the necessary pressure and vacuum. The bench also includes a microprocessor based portable digital pressure calibrator for pressures between -1 and 10 bar. The measuring instruments include a sloping, liquid filled manometer reading pressure from 0 to 75mm of water, a vertical manometer reading from 0 to 200 mm of water, a manometer reading from 0 to 760 mm, a pressure transducer with analogue readout and a Bourdon tube gauge scaled - 1 to 2.5 bar for reading both pressure and vacuum.
Experimental Capability:
Measurement of differential pressure using a manometer
Comparison of two methods of measuring pressure
Calibration of pressure transducer
Comparison of two methods of measuring vacuum
Digital pressure calibrator
Features:
All moving parts Finished to close Tolerance
Spindle Ram is made out of Alloy Steel.
Column, Arm, Work Head And Gears are made out of Closed Grain.
Prior Assembling of Main Gear And Pully
Parts Finished on imported Grinding Machine
Parts Properly Balanced.
Power supplies:
0/15 Vdc, 1 A
0/+15 Vdc, 1 A
15 Vdc, 1 A
5 Vdc, 1 A
606 Vac, 1 A
+15 Vdc, 1 A
+5 Vdc, 1 A
Features:
Interface.
This instrument is composed of flat lens, frame, lens base.
The size of the lens is 90mm*60mm, each set include two flat lenses and supports.
An electrical heating element is fitted into the block, the electrical supply provided from a variable transformer with front panel control so that the rate of heating and final temperature can be controlled as desired. Temperature Measuring Bench is designed to demonstrate a number of commonly used methods of temperature measurement, and provides the means for calibration and accuracy comparisons of the different methods. Hence, suitable measuring devices can be found for particular applications. The main unit comprises a bench mounting console which contains the hot water bath, furnace, ice bath, a digital resistance thermometer/thermocouple instrument, digital NiCr/NiA1 thermocouple instrument and power supplies. The hot water bath comprises a Dewer flask whose lid is fitted with a combined heater stirrer unit, low water cut out to provide boiling water reference at 760 mm Hg barometric pressure. Features are provided so that a number of faults commonly occurring in thermocouple systems can be demonstrated. In addition the unit may be used to provide a temperature measuring facility for use with other experiments. The furnace comprises a brass block with holes drilled to accept a glass thermometer, resistance thermometer and thermo-couple. An over temperature thermostat is set to limit the maximum temperature to 250ºC. The heater unit incorporates an adjustable thermostatic temperature control and over-temperature cut-out.
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This instrument is composed of a double convex lens, a double concave lens, a prism,3 rods and 3 bases.
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The model consists of two hooke's couplings that are connected by a split intermediate shaft. The deflection angle of both joints can be set individually and read on the scales. Drive is achieved by turning a hand wheel. On the drive and power take-off sides there are further angle measuring scales made of transparent plastic with which the difference between the angles of the shafts can be determined. The table model demonstrates the transmission of angular motion to joint shafts, the related gimbal error and how this error can be rectified using hooke's couplings.
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The bourdon gauge and pressure sensor are mounted on a manifold block with a separate reservoir to contain the hydraulic fluid water for safety and ease of use. Valves enable easy priming, restricted flow of water to demonstrate the application of damping and the connection of alternative devices for calibration.
A bench top unit designed to introduce students to pressure, pressure scales and common devices available to measure pressure.
The DPC consists of a precision ground piston and cylinder with a set of weights giving an operating range of 20 kNm-2 to 200 kNm-2.
The equipment utilises a dead weight pressure calibrator DPC to generate a number of predetermined pressures. This is connected to a Bourdon gauge and electronic pressure sensor to enable their characteristics, including accuracy and linearity, to be determined.
The input angle is set on a ball bearing mounted crank disc made of anodised aluminium and read off on an angle measuring scale integrated into the base plate. A millimetre scale is fitted for the outlet stroke. The crank radius can be adjusted in three positions.
The simple insertion of a bolt enables the swivelling cylinder to be locked, thus a crank drive with either a fixed or oscillating cylinder can be demonstrated.
This experimental unit demonstrates the conversion of smooth rotary motion into reciprocating motion.
The components are attached to a solid, painted base plate. Two handles make the unit easier to carry.
It supplies the power necessary for the operation of the boards of digital electronics.
Technical Features:
1 CLK2 pulse generator, 5V amplitude, variable frequency from 1Hz to 1 kHz, rise edge synchronized with CLK1
8 logic variable (true and false) generators
3 stabilized and protected dc outputs
+12V/500mA, +5V/2A, 5.2V/500mA
1 CLK1 square wave generator, 5V amplitude, variable frequency from 1Hz to 1 kHz
9 LED for visualization of the logic states
Power supply: single phase from mains
Power Supply
Designed for electronics laboratories. Its main purpose is to realize a power supply source with high safety features and remarkable electric performance.
Output voltages of Power Supply for Digital Electronics
2 ac power supplies: 0250V/1A and 025V/2A isolated from the mains
Series of sockets: 220 V, 10/16A
2 independent stabilized supplies: 030V, 02 A, complete with digital instrument for voltage and current. Possibility of tracking.
Fixed dual supply: 24V/1A
Fixed dual supply: 5V/1A
Fixed dual supply: 12V/1Av.
The temperature of the condensing water vapour in the hypsometer can be determined accurately using the software or tables in the manual, providing knowledge of the barometric pressure is known. The water level is simply raised to change the hypsometer into a variable temperature water bath.
A bench top unit designed to introduce students to temperature, temperature scales and commonly available devices to measure temperature.
Temperature sensors with different thermometric principles and characteristics are supplied. An accurate platinum resistance thermometer with five point calibration certificate and temperature indicated directly in deg C, is included for reference.
The equipment comprises a hypsometer/hot water bath and ice flask to generate accurate fixed points (the condensation point and triple point of water) and variable temperatures.
The model is intended for wall mounting. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. With straightforward experiments, the torque conversion in gear wheel pairs and the efficiency of a gear unit are investigated. The mechanism demonstrates the relationship between the ratio of the number of teeth on spur gears and the transmission ratio of gears.
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