8. BRIDGES

ELECTRONICS LAB TRAINERS

		DIGITAL & LINEAR IC TRAINER
		POWER SUPPLIES
		BASIC DIGITAL ELECTRONICS LAB TRAINERS
		BASIC ELECTRONIC CIRCUIT TRAINERS
		BASIC ELECTRONIC DEVICE TRAINER
		BASIC LINEAR INTEGRATED CIRCUITS TRAINER
		BASIC CIRCUIT THEORY TRAINER
		BRIDGES
		TESTING AND MEASURING EQUIPMENTS

BASIC ELECTRONICS LAB TRAINERS & EQUIPMENTS

8. BRIDGES

1. WHEAT STONE BRIDGE (VWB-01)

2. KELVIN'S DOUBLE BRIDGE [VKB-02]

3. MAXWELL'S INDUCTANCE BRIDGE [VMIB-03]

4. ANDERSON BRIDGE [VAB-04]

5. HAY'S BRIDGE [VHB - 05]:

6. DESAUTY'S BRIDGE [VDB-06]

7. SCHERING BRIDGE [VSB-07]

BRIDGES


1. WHEAT STONE BRIDGE (VWB-01) [TOC]

This trainer is designed to study the working principle of the bridge and to find the unknown values of Medium resistances (50S-1MS)
Four arms with one unknown arm to connect the unknown resistance Two range selection arms provided to select the nearest range of unknown value. Range of Measurement : 50S - 1MS Accuracy (Min to Max.) : ±0.2, ± 5S Tolerance : ±5% Galvanometer (Range : -10V to +10V) provided to indicate the Balance conditions Built-in power supply Built-in Attractive power coated cabinet with mimic logic. Technical Reference Manual Required patch Chords are provided

2. KELVIN'S DOUBLE BRIDGE [VKB-02] [TOC]

This bridge is designed to study the working principle and to find the unknown value of low value resistances.
Four primary arms provided to balance the bridge (Two arms are range selections) Two secondary arms are provided for range adjustment. Provisions to connect the unknown resistance at one arm Range of Measurement : 0.1S - 10S Tolerance : ±5%
Connector provisions to connect the standard value of unknown resistance externally. Built-in power supply All are housed in a powder coated cabinet with mimic logic Technical Reference Manual Required patch Chords are provided

3. MAXWELL'S INDUCTANCE BRIDGE [VMIB-03] [TOC]

This trainer is designed to study the unknown Inductance value of range of Q factor below 10.
One arm with provisions to detect the nearest Range of unknown inductance. Two arms with variable potentiometers given to balance the bridge in null condition One 1 KHz oscillator of fixed amplitude to feed the input to the bridge. One audio amplifier with speaker to detect the bridge balancing conditions. Four arms provided with suitable connectors
Tolerance : ±5% Built-in power supply Connector facility given to view the output of the bridge externally by CRO All are housed in a power coated cabinet with logical diagram. Required patch Chords are provided* Measurement Range : 15mH - 190mH

4. ANDERSON BRIDGE [VAB-04] [TOC]

This bridge is designed to study the working principle and also to find the unknown inductance in the range of 25mH to 500mH.

4 Main arms with 2 adjacent arms with suitable terminal connectors

Two variable resistances provided to keep the bridge in balance condition.

Input to the bridge is taken from a 1KHz Oscillator with fixed amplitude.

Measuring Range : 25mH - 500mH

Sensitivity : ±2mH

Audio amplifier with miniature speaker provision given to find the point of balance.

Built-in power supply

All are housed in a metallic cabinet

Technical Reference Manual

Required patch Chords are provided[ 66 ]

5. HAY'S BRIDGE [VHB - 05]: [TOC]

This trainer provides the facility to study the basic principle and to find the unknown Inductance value of Q-factor above 10.

Four arm Bridge with suitable connectors

One arm with fixed resistors provided to select the nearest range of the unknown Inductance

Measuring Range : 1mH - 999mH.

Sensitivity : ± 5mH

One variable potentiometer to balance the bridge in Null condition

Input to the bridge is taken from a 1KHz Oscillator with fixed amplitude

One Audio amplifier with miniature speaker provisions acts as a balance detector.

Built-in power supply

All components are mounted in a metallic cabinet with mimic logic

Technical Reference Manual

Required patch Chords are provided

6. DESAUTY'S BRIDGE [VDB-06] [TOC]

This trainer is designed to study the working principle and to find the unknown value of capacitance of range 0.001µF to 1µF.

4 Arms with suitable connector provisions

One arm with fixed range of capacitors provided to detect the nearest unknown capacitance

Two arms with potentiometers provided to balance the bridge

Measurement Range : 0.001µF to 1µF

Sensitivity : ±0.03µF

Input to the bridge is taken from a 1KHz oscillator with fixed amplitude.

One Audio amplifier with miniature speaker to detect the balance condition of the bridge

All components are housed in a metallic cabinet.

Technical Reference Manual

Required patch Chords are provided

7. SCHERING BRIDGE [VSB-07] [TOC]

This trainer is designed to study the working principle and to find the unknown value of capacitance of range .001µF to 2µF.

4 arm with suitable connectors provided

Provision to connect the unknown capacitance at one arm

Two potentiometers provided at two arms to obtain the bridge balance condition.

Input of the bridge is taken from a 1KHz fixed amplitude Oscillator.

One audio amplifier with miniature speaker is provided to detect the bridge balance condition acoustically.

Measuring Range : 0.001µF - 0.22 µF

Sensitivity : ±0.1µF

Tolerance : ±5%

All are housed in a metal cabinet

Detailed documentation

Required patch Chords are provided [ 68 ]