BERT – Battery Electrical Resistance Tester

Code: EBR5010

BERT is a simple way of introducing electrical resistance and resistivity to a class. It consists of a circuit board that may be drawn on using the supplied pencil. Connecting the two sides of the board together by a pencil line gives a conducting track and the LED lights. The brightness of the LED gives an indication of the resistance of the path.  Drawing the line thicker decreases the resistance, as does shortening the path. Resistances in parallel may be studied and a “volume control” simply made.  

BERT may also be used to test various materials to see whether they are conductors or insulators. Liquids and pastes may also be tested.  The conductivity of the class may be studied as well as how a switch works.  When you are finished the pencil lines may be removed with the supplied eraser.

Description

A stunningly effective way of teaching the basics of electrical resistance.

The kit comprises of: 

  • 1 x BERT circuit board
  • 1 x PP3 battery
  • 1 x 3B pencil
  • 1 x crocodile clip connecting lead
  • 1 x eraser
  • 1 x full set of teaching notes.

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Description

Code: EBR5010

BERT is a simple way of introducing electrical resistance and resistivity to a class. It consists of a circuit board that may be drawn on using the supplied pencil. Connecting the two sides of the board together by a pencil line gives a conducting track and the LED lights. The brightness of the LED gives an indication of the resistance of the path.  Drawing the line thicker decreases the resistance, as does shortening the path. Resistances in parallel may be studied and a “volume control” simply made.   BERT may also be used to test various materials to see whether they are conductors or insulators. Liquids and pastes may also be tested.  The conductivity of the class may be studied as well as how a switch works.  When you are finished the pencil lines may be removed with the supplied eraser.

Code: EPT5001

(Portable Appliance Tester and Checker). Performs electrical safety tests on portable appliances allowing compliance with EAWA regulations. The unit performs earth bond and insulation tests on both Class 1 and Class 2 appliances, extension leads, IEC and kettle leads etc. The unit is very simple to operate and gives clear, unambiguous pass/fail indications. Complete with test leads, instructions, pass and fail labels, a Tester's Certificate of Inspection and is fitted with moulded mains plug.

Code: EPC7000

A multipurpose unit that allows the user to easily calculate Planck's constant, to measure the wavelength of coloured light, demonstrate colour light transmission through colour filters and show the diffraction patterns for various wavelengths of coloured light using a range of 4 LEDs (Red, Yellow, Green and Blue) covering the light range from deep blue at 470nm to near IR at 940nm.
Pack of 10 24V 21W Small Bayonet Cap (SBC) Radial Filament Lamps.
By connecting an ac power source to one of the coils and reading the voltage from the other coil transformer action (either step up or step down) may be readily demonstrated. The efficiency of the transformer may be studied –does the efficiency change if the laminate top is not firmly fixed? What happens if it is not present? Other more esoteric effects such as Magnetostriction may also be studied.Code: IV8000 The Powerbase V8 comes with a high power rotary transformer and a high specification toroid transformer replaces the original chassis transformer. The unit supplies 0-20V smoothed dc and 0-16V AC at 8 amps. The output is continuously variable and protected by a panel mounted thermal cut out. An output limiter is fitted which allows the user to preset the maximum voltage available.
Content
A stunningly effective way of teaching the basics of electrical resistance. The kit comprises of: 
  • 1 x BERT circuit board
  • 1 x PP3 battery
  • 1 x 3B pencil
  • 1 x crocodile clip connecting lead
  • 1 x eraser
  • 1 x full set of teaching notes.
A simple to use PAT machine that allows the user to perform Class1 and Class 2 insulation tests, earth bond tests at two different current levels and extension lead tests. The compact unit clearly displays the results via coloured LEDs. A single push button initiates all the tests in a 5-second cycle. •Class 1 Earth Bond test •Class 1 and Class 2 Electrical Insulation test •Mains switch and circuitry test •Extension Lead test •IEC lead test •Results are displayed by coloured LEDs.  Timed test period. Comes complete with 100 pass labels, 50 fail labels, Earth Bond Test lead, Extension lead test lead and full instructions including sample inspection certificate.
Box mounted with 5 x 4mm sockets for attachment to an ammeter or voltmeter to display measurements. Monitoring the voltage of each LED a graph of energy input as a function of light frequency emitted can be measured with an approximate value of Plank's constant calculated.
  • Supplied with 500 lines/mm diffraction grating
  • Designed and manufactured in the UK

Code: OPR1221

Pack of 10 24V 21W Small Bayonet Cap (SBC) Radial Filament Lamps.

Code: L1017

A demountable transformer kit is an ideal way to demonstrate transformer action.  The kit comprises three coils, one with 300 turns, one with 600 turns and one with 1200 turns. These slide onto a laminated steel frame to form several possible transformer configurations.
  • A heavy-duty power supply for powering laboratory experiments.
  • Heavy duty variable transformer and high power toroid transformer
  • Continuously variable output of 0 to 16Vac and 0 to 20V dc capacitor smoothed
  • Output current  8A.  Output voltages are rated at 8A load so higher voltages are available at less output current.
  • Manufactured in the UK with 5 years warranty
  • AC and DC outputs may be used simultaneously up to rated current.  
  • Colour coded 4mm sockets.
  • Maximum voltage limiter operated by Allen key
  • Push button cut-out to protect against overload and short circuit conditions
  • Available in Irwin Blue or transparent case
  • Mains Input 230V, 50Hz
  • Fusing: 5A mains plug fuse
Weight
DimensionsN/AN/AN/AN/AN/AN/A
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