The Computer Controlled Torsional Vibration Unit is an unit designed to study the torsional vibration, the torsional stiffness and the behaviour of a torsional vibration system with two and three torsional weight vibrator.
Vibrations are transmitted into the torsion bar by means of an electrical motor, which speed is computer controlled. The bar is supported by the base with movable pillars.
An adjustable damper can influence in the vibrations. Shaft encoders on the chucks provide the amplitude of vibration as an electrical signal.
Rigid weight discs, of several diameters and inertia, and pivoting bearings can be located at unlimited positions along the bar.
To facilitate the theoretical comprehension, the exercises are made with a metal torsion test bar, the main element of the unit.
Weight discs can be fixed to the bar with the aid of chucks and flanges; this way, it is possible to assemble torsional vibration systems with one, two or three weights.
Computer interface unit and software are included. The Virtual Work Computer Assist set has the same accessories as except Moment Supports are replaced by Moment Load Cells, and Vertical Force Support is replaced by Vertical Force Load Cell.
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A bench top frame of profiled aluminium, houses shafts which can be moved within the grooves of the profile. Understanding the basics of gear trains is important. Gear Train Demonstrator ensures this is done in a simple, visual and durable way. The profile grooves ensure the quick and easy release and securing of the shaft and hence component parts. The Gear Train Demonstrator are manufactured from durable plastic and all other components are industrial standard parts. Onto the shafts sis bearings and the gear components themselves. Rotation of the gear arrangements is done manually. The pitch circle diameters of the gears are visually shown also.
Experimental Capabilities:
Variation of operation between different transmissions
Efficiency of different transmission types
Accuracy of setting up of different gears
Gear ratios
Input and output ratios
Modulus of gears.
The channel sides are transparent in order that bed profile changes can be readily observed, and a section of one side is provided with graphical grid markings to permit quantitative assessments to be made of bedform dynamics. The unit consists of an inclinable channel mounted on a base plate, together with a discharge tank and recirculating pump. To commence a demonstration, sand is placed evenly along the channel bed, between the inlet tank and the overfill discharge weir. The channel slope is adjusted by means of a fine screw jack to which is attached an accurate slope indicator. Water is circulated around the system at one of the three selectable flow rates.
Experimental Capability:
Mechanics of sediment transport
Depositionary features and facies
Fixed, smooth bed flow
Flow over a fixed, gravel bed
Flow over a mobile sand-bed
Bed form hysteresis
Computational work
Local scour
Flow structures
The Hybrid Vehicle Demonstrator includes a Hybrid engine, a battery and an Electronic Control Unit, several meters showing power flow between the units, a brake switch and a potentiometer mimicking the accelerator pedal. The system can also be used to show the effects of regenerative braking. Two models are available: a bench top version and a panel mounted version. The controls the system to show students how the power is routed in a hybrid depending on the State of Charge of the Battery, and to allow them to make measurements on the engine performance under different load conditions.
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The light intensity can be manually adjusted through a potentiometer or automatically controlled to allow performing experiments with different light intensities, therefore simulating the light conditions from dawn to twilight. Lamps For Photovoltaic Solar Trainers is used to provide suitable lighting to the photovoltaic solar module.
The Lamps For Photovoltaic Solar Trainers includes the following main components:
Magnetothermal switch, differential 10A
Potentiometer, 10k
4 off halogen lamps, 300 W each
Dimmer for controlling the light intensity.
The deflection of a spring depends on the load applied to it, an observation enshrined in Hooke's Law Applications of springs are found in spring balances which indicate loads by measuring spring deflections and in car suspensions where they absorb energy caused by wheel vertical movement due to potholes and bumps. Compression of Springs Apparatus are used in engineering to store energy or to provide restoring forces. Both compression and tension springs may be encountered.
Experimental Capabilitis:
Using the optionally available compressive spring set the dependence of spring stiffness on the wire diameter, spring diameter, length, number of turns and material can be observed and calculated
To determine spring stiffness using measured experimental results and formulae provided
To test the relationship between the load applied and the change in compressive length of a spring
Load versus compression graphs
Action of springs.
Instant trigger launches spring-based blade
In-built mechanism to retract needle tip preventing reuse or injury.
Used for capillary blood collection.
Blade depth approx. 2.4mm
Single-use disposable
Sterile.
Cold box, Small, Long range
Vaccine storage capacity: 6 litres
With hinged lid and carrying handles.
Cold life at 43°C without openings: 106 hours
Supplied with 26 x 0.4 litre icepacks as a standard.
Weight fully loaded: 27.54 Kg.
Vaccine storage capacity: 36.5 L
Volume category: <60 L
Equipment operating voltage and frequency: 110-240 Volt 50Hz /60Hz, 1ph.
Refrigerant: R600a, 60 grams
Energy consumption, stable running (kWh/24 hours): 0.8
Operating temperature: Min and Max rated ambient temperature: +5 °C and +43°C
UIFPF- Grade A
PQS Prequalified Intermittent Mains Powered Refrigerator for storage of vaccines at +2 ?C to+8?C.
To be supplied with:
Remote Temperature Monitoring System RTMS - standard
The door / lid fitted with a lock and two keys, 1 basket.
(Standard): Extended type integrated voltage stabilizer with input voltage regulation range of 110-240 Volt 50Hz /60Hz, nominal input/output.
With PQS prequalified 30-day temperature logger.
Vaccine storage capacity: 48 L
Volume category: <60 L
Ambient operating temperature: Min. +5°C, Max. +43°C
UIFPF: Grade A
PQS prequalified Solar direct drive combined refrigerator and freezer with no battery for storage of vaccines at +2 ?C to+8?C and freezing of ice packs in areas without any electricity, or where there is less than eight hours of reliable electricity over a typical day.
Refrigerant: R290, Refrigerator system: 55g/Freezer system: 45g.
A sealed bottle of water inserted into a breathing circuit to add moisture to the breathing gases for administration to a patient. This type of humidifier does not heat the gas.
Graduated, transparent humidification bottle, shatter resistant.
Graduation shall show minimum and maximum water level.
Detachable metal or rigid durable polymer cap with gas connectors.
Non-heated, reusable humidifier for oxygen therapy and ventilation/anaesthesia inspiratory lines.
Bubble-through humidification system.
DISS connectors for gas inlet and outlet
All available adaptors for gas connection to be described in bid response
Flow rate capacity up to 15 L/min.
Safety pop-off valve incorporated.
Autoclavable and/or disinfectable with hospital grade detergents.
Humidification chamber working volume at least 150 ml, not greater than 500 ml.
Material: Martensitic steel (quenched, magnetic steel).
Martensitic steel composition: 0.15-0.20% carbon; 12-13% chromium.
To grip soft and delicate tissues (lungs, intestines, stomach).
Pronounced but atraumatic ridges of the grippers.
Ridged grippers with aperture (triangular).
Pressure force instrument: gripping forceps, springy
Soft ratchet, lockable.
Flexible arms.
Length: 23 cm.
Jaw: approx. 27 mm.
Reusable.
Intended use:
To measure the mid upper arm circumference for rapid screening of nutritional stauts of pregnant/lactating women.
Adults' Mid Upper Arm Circumference (MUAC) measuring tape with a range of up to 50 cm. Pack of 50 tapes with pictorial and text instructions for use printed on the reverse side, reusable, in English language.
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The product is a set of mechanical demonstration experiment, the time is measured by digital timer, air cushion guide is used for small gas source, and the products can be used in many kinds of mechanical experiments such as average speed, acceleration and elastic collision.
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Consists of iron cage, plastic plate.
Plastic tank, size:430*320*26mm, with hook.
Iron cage:330*215*310mm, made by painted iron( ≥φ2mm)with hook.
It is used for labs in elementary and middle school: scalding, strong acid burns and strong alkali burns with disinfectants and emergency treatment medicine.
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Temperature and Humidity Meter
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The auto-test ampoules contain a pre-measured amount of liquid reagent and easily fill with the correct volume of sample for simple and fast sample and reagent mixing. Minimize the risks of improper measurement and contamination with IV Chemistry Reagents, which are contained in self-filling vials. Use these reagents with the colorimeter to simplify sample preparation and tests. Each ampoule contains an Auto-ID barcode that is read by the colorimeter and used to automatically identify the test parameter and initiates the test.
Consistency and reproducibility improved with ampoules and an meter.
No. of test: 30
