Capacitance Substitution Box

Code: ECS8100

Our five-decade capacitance substitution box has been specifically designed for the schools market with its clear display and ease of use.

Unit will simulate capacitances from 100pF to 9.9999µF in 100pF steps
Max. voltage 50V DC
The required capacitance is set by a counter with the value displayed in µF, nF and pF
Output is via 4mm terminals with 4mm sockets
Housed in a sturdy ABS box

Category: science equipments and consumables

Description

Description

Technical Details

Voltage rating	50V DC max.
Capacitance range	100pF to 9.9999µF in 100pF steps
Accuracy	±10% per decade
Residual capacitance	40pF

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Settings Capacitance Substitution Box remove Dual Output PSU (12VAC/12VDC) remove Mounted SBC Lamp Holder - Pack 10 - 12V, 24W Lamp remove Resistance Substitution Box remove BERT - Battery Electrical Resistance Tester remove Lamp Brightness Experiment remove

Name Capacitance Substitution Box remove Dual Output PSU (12VAC/12VDC) remove Mounted SBC Lamp Holder - Pack 10 - 12V, 24W Lamp remove Resistance Substitution Box remove BERT - Battery Electrical Resistance Tester remove Lamp Brightness Experiment remove

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Description

Code: ECS8100

Our five-decade capacitance substitution box has been specifically designed for the schools market with its clear display and ease of use.

Unit will simulate capacitances from 100pF to 9.9999µF in 100pF steps
Max. voltage 50V DC
The required capacitance is set by a counter with the value displayed in µF, nF and pF
Output is via 4mm terminals with 4mm sockets
Housed in a sturdy ABS box

Code: IPC-1402-P

This instrument (IPC-1402-P) is designed as a general purpose laboratory power supply. It has two isolated outputs which operate independently of each other. The AC output is selected by means of a 4-position switch on the front panel. Selected voltages are 2, 4, 6 and 12V at 4A continuously, or up to 5A for periods of 1 hour. The output is supplied via a pair of 4mm sockets on the front panel colour coded white. The output is protected from overload or short circuit by a current sensing circuit breaker mounted on the front panel. The DC output is smoothed and regulated and is continuously variable from 0V to 12V at currents up to 3A. Voltage ripple typically less than 50mV. The output is supplied via a pair of 4mm sockets on the front panel colour coded red (positive) and black (negative). The output is protected from short circuit or overload by an electronic regulator. The outputs may be used simultaneously as long as the combined load does not exceed 3A. Power on is indicated on the front panel by a green LED. An illuminated on/off switch is mounted on the rear panel adjacent to a fused IEC mains inlet. Enclosed in a robust metal case with a durable powder coated finish. Supplied with detachable mains lead and instructions. A pair of graphs showing how the output voltage of this power supply varies as the current supplied is increased is included in the instruction leaflet for this instrument.

Solid steel Small Bayonet Cap (SBC) lamp holder with a tough powder coat paint finish and a solid brass lamp holder with 2 x 4mm electrical sockets. Ready to use supplied with a 12V 24W Lamp.

Code: ERS8050

A six-decade resistance substitution box designed for use in educational establishments.

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: ELB8000

Students often think that the brightness of a lamp is only dependent on the current flowing through it. The unit allows the teacher to safely switch a 12V lamp in series with a mains lamp and study the current flow through them.

Content

Technical Details

Voltage rating	50V DC max.
Capacitance range	100pF to 9.9999µF in 100pF steps
Accuracy	±10% per decade
Residual capacitance	40pF

Description: Dual Output PSU (12VAC/12VDC) Part Number: IPC-1402-P Electrical Supply: 220-240VAC, 50-60Hz Dimensions: 179 x 190 x 85mm overall Mass: 2.9kg AC Output Voltage Range: 2, 4, 6 and 12VAC Maximum AC Output Current: 4A (5A upto 1 hour) DC Output Voltage Range: 0 to 12VDC Maximum DC Output Current: 3A

Code: OPM5024

Pack of 10 Solid steel Small Bayonet Cap (SBC) lamp holder with a tough powder coat paint finish and a solid brass lamp holder with 2 x 4mm electrical sockets. Ready to use supplied with a 12V 24W Lamp.

Simulates resistances from 1Ω to 999,999Ω in 1Ω steps
The required resistance is set by selecting the correct value from six rotary decade switches which clearly indicate the value selected by the student
An additional 1kΩ resistor is provided connected between one of the terminals of the internal resistance and a third terminal so the unit can be used as an accurate potential divider
All outputs are on 4mm terminals with 4mm sockets
Housed in a tough ABS box with non-slip rubber feet
Voltage rating 250V
Power rating 600mW
Dimensions 110 x 75 x 50mm
Designed and manufactured in the UK

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.

This includes kit includes the use of a safety mains lamp socket, which has a built in a switching system that only allows it to be switched on when a lamp is inserted. We have also included two switches, which must be pressed simultaneously to route the mains current through the low voltage lamp. Furthermore, the switches are sited at opposite ends of the case, requiring two hands to operate them. However, it must be appreciated that you are working with potentially lethal voltages and currents and therefore extra care should be taken.