The Study of Microcontroller
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The Study of microcontroller Electronic Engineering Lab
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The asynchronous motor represents the most important and simple case in the area of poly phase machines and it is the most wide spread for industrial applications as food, chemical, metallurgical industries, paper factories or water treatment and extractive systems. The Bench for the Study of Three Phase Asynchronous Motors is a multi purpose bench for the study and characterization of three phase a synchronous motors of the series.
The characteristic key of this bench is its total modularity which means:
To configure complete solutions without creating duplication of equipment
To couple each motor with the electromagnetic brake
To be able to buy the bare essentials.
Among three-phase power supply the synchronous machines are widely used and they called so because the speed of the rotor of these machines are the same as the rotating magnetic field. They are commonly used as generators especially for large power systems, such as turbine and hydroelectric generators in the grid power supply. Because the rotor speed is proportional to the frequency of excitation,synchronous motors can be used in situations where constant speed drive is required. Since the reactive power generated by a synchronous machine can be adjusted by controlling the magnitude of the rotor field current, unloaded synchronous machines are also often installed in power systems solely for power factor correction or for control of reactive kVA flow. Their construction is almost similar to that a three-phase induction motor except the fact that the rotor is given DC supply.
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To make the students understand the princle of the iodine sublimation.Exhaust part of the air to make the tube be partly vacuity.There are solid iodine in the tube, with two ends non-puncture.
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It consists of printed 0°-360°' base, φ20mm campass.
Support rod, vertical rod.Size of vertical rod:≥40mm,Can be vertically inserted into the base.
Angle plate which is a adjusted φ120mm semi-circle with projection hole and screen hole at both ends.
The Temperature Alarm Apparatus Kit
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The World Three-Dimensional Terrain Model
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The liquid therapeutic diet is intended for stabilisation phase of treatment of children diagnosed with SAM. It is intended to stabilize the child’s metabolism and support rehydration. The specified quantity of powdered therapeutic milk is mixed with the specified quantity of water boiled and cooled down to not below 70?C to obtain a defined quantity of liquid therapeutic diet with an energy density of approximately 75 kcal/ 100ml.
It comes as powder packed in a canister to prepare a liquid therapeutic diet with an energy density of approximately 75kcal/100 ml. Therapeutic milk diet with added vegetable fat, carbohydrates, vitamins and minerals.
Therapeutic complex of vitamins and minerals (CMV) is for a nutritional fortification for making therapeutic foods in the dietetic treatment of severe malnutrition. Use to prepared phase 1 milk (F-75) and enriched high energy milk (F-100). Therapeutic CMV is packed in 800g metal tins, in cartons of 6 tins. Each tin contains a measuring scoop to weigh 6.8 g.
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Ready-to-use Therapeutic Food (RUTF), spread, 150 sachets of 92 g per carton. The RUTF paste may be used in climatic extremes from the arctic to tropical zones and may be the sole source of food, except for water and breast milk, during the period of use. Ready-to-Use Therapeutic Food (RUTF)paste, is a high-energy fortified food to be used by humanitarian agencies, governmental and non-governmental organizations for the treatment of Severe Acute Malnutrition (SAM) in any cultural setting in accordance with guidelines for the outpatient care and management of Severe Acute Malnutrition.
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Medium weight stretch fabric with brushed interior for warmth and comfort.
Thumb holes keep shirt in place and wind out.
The apparatus consists of a vertical stack of specimens clamped between an electrically heated source at the top and a water cooled base, all contained within a Dewar vessel and furnished with a radiation shield and anti convection baffle. The heating current is supplied from a variable voltage power pack and displayed on a digital ammeter. The specimens are fitted with very small thermocouples at known distances apart and connected via a selector switch to a digital temperature readout. Cooling water is supplied from the constant head water tank mounted above the Dewar vessel. The water cooled base is designed as a calorimeter to measure the heat flow and fitted with very accurate thermometers in the water circuit.
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The assembly is contained in a thermally insulated enclosure to minimise heat losses. The heat flowmeter gives an output to a digital panel meter on the special control and instrumentation console. Special thermocouples are arranged to measure mean temperatures either side of the test specimen, allowing the temperature gradient across the sample and hence the thermal conductivity to be determined. The Thermal Conductivity of Building Material Apparatus uses a PID controlled flat plate electrical heater and a water cooled flat plate with an integral and highly sensitive heat flowmeter. The 300mm *300mm specimen under test is sandwiched between the heated and cooled plates.
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Thermal Conductivity of Liquid and Gases is aspect of heat transfer studies that is often overlooked but of crucial importance in the prediction of heat exchanger performance. A compact unit designed for the direct measurement of the Thermal Conductivity of a wide range of liquid and gases. The unit is complementary to the Thermal Conductivity of Building and Insulating Materials Unit. The simple calibration procedure enables the effect of incidental heat transfer to be determined and the unit is supplied complete with a console for the control and display of temperatures and heat input.
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Thermal Conductivity Of Non Metallic Materials bench top unit is for testing of thermal conductivity of non-metallic materials using guarded hot plates. The assembly is encased in a test cabinet with insulation. The cold plates are clamped together to provided a uniform pressure. A service module provides power supply and heater control unit, power measurement unit and temperature indicators. The equipment consists of a central heater with hot plates, a guard ring with heater and hot plates, and two water cooled cold plates. Two specimens are insterted between the hot plates and cold plates. The unit requires outside water supply.
Experiments:
Determination of thermal conductivity.
Experiments:
Heat transfer
Multi-variable control up to three variables can be monitored and individually controlled
ON/OFF control experiment includes investigation of over shoot and undershoot, Frequency response of model process
Thermal inertia and variable-time constants
The flexible design of the equipment allows the user to develop many other analysis and control exercises to suit their needs. It is good for extended or advanced control experiments, and is ideal for student project work.
ON and OFF time ratio, rates of heating and cooling, offset and hysteresis
Proportional, proportional + integral, or proportional + integral + differential control.
Operation with hot and cold water supplies
Adjustment of the water temperature using mixing battery with thermocouple
Investigating the thermal expansion of different pipe sections
Water connections made using quick-release couplings
Force measuring device to determine the expansion force
Temperature measurement using battery-operated digital thermometer
Pipe sections can be selected by ball valves.
