MEASUREMENT AND TESTING INSTRUMENTS

OSAW Industrial  Kelvin Double Bridge Setup

OSAW Industrial Kelvin Double Bridge Setup
OSAW Kelvin Double Bridge have been designed for the convenient and accurate measurement of low resistances. These instruments are particularly useful for measurements of resistance of Transformers, Armature Windings, Quality Control of Electric Cables and wires, Temperature rise Test of Transformers and similar applications.
This bridge is Compact, Robust and Simple in operation and measurements to be carried out with highest attainable precision.

Technical Specifications:

(i) OSAW Industrial Kelvin Doble bridge of range 0.2micro ohm to 11 ohms.

(ii) DC Power Supply 15V/10A

(iii)OSAW Spot Galvanometer

(iv) One meter Conductivity attachment

(v) Instructional Manual

(vi) Necessary Connecting leads

 

OSAW SENIOR KELVIN DOUBLE BRIDGE SETUP

OSAW SENIOR KELVIN DOUBLE BRIDGE SETUP
Technical Specifications:
(1) OSAW Senior Kelvin Double Bridge of range 0.02micro ohm to 1.1 ohms.
(2) DC Source 3V/25A
(3) Conductivity Attachment
(4) OSAW  Sensitive Spot Reflecting  Galvanometer
(5) Connecting leads

 

OSAW STUDENT KELVIN DOUBLE BRIDGE

OSAW STUDENT KELVIN DOUBLE BRIDGE
OSAW Student Kelvin Double Bridge is used to measure the Unknown Low Resistance

Technical Specifications:

(i) The Variable arm of the bridge consists of a decade dial of 0.1 Ohms step and a graduated scale(0.1 Ohms divided in 100 equal parts)the value of one scale division at multiplier 1 is 0.001 Ohms.

(ii) A double ratio box is also incorporated in the same box in order to avoid inconvenience.

Two sets of Ratio arms are provided and selected simultaneously by leads of galvanometer

Giving multiplying factor of 100 , 10 , 1 , 0.1 and 0.01.

(iii) A battery press key and a jockey which slides on the scaled slide wire is provided for detection of Balance point.

(iv) Four Terminals(C1 , P1 , P2 , C2) are provided to connect the Unknown Four terminals Resistance.

(v) Two Terminals marked D.C. Source are provided to connect D.C. Supply Source.

 

OSAW Crompton Potentiometer

OSAW Crompton Potentiometer
Crompton Potentiometer is an instrument for measuring an unknown e.m.f. or Potential Difference by Balancing It.It is meant for D.C. Measurements only

Technical Specifications:

(i) Range: 0 – 1.75Volts

(ii) A Rotatory Switch selects 0 – 1.5Volts in steps of 0.25 Volts

(iii) Circular Slidewire has 500 divisions, each of 0.5millivolts.

(iv) Smallest direct reading: 0.5 millivolts(0.0005 Volts)

(v) Accuracy    : ± 0.5%

 

OSAW Slide Wire Precision Potentiometer

OSAW Slide Wire Precision Potentiometer
A Potentiometer is an instrument for measuring an unknown e.m.f. or Potential Difference by Balancing It,whole or in part,by a known potential difference produced by the flow of a known current in a network of a circuit of known charactersticks.

Technical Specifications:

(i) Range : 0 – 1.8 Volts in two stages

(ii) Range Multiplier : ×1  —-0 to 1.8 Volts  ;   ×0.1 ——0 to 0.18 Volts

(iii) Smallest direct reading : 0.0002 Volts

(iv) Smallest reading with multiplier : 0.00002 Volts

(v) Resistance : 11 Ohms/Volt

(vi)Accuracy on the normal range : 0.0001 Volt

(vii)Inter range accuracy : 0.01%

 

OSAW Direct Reading Potentiometer

OSAW Direct Reading Potentiometer
Self contained Portable general utility Potentiometer with built in battery,Standard cell and Galvanometer.

Technical Specifications:

(i)Range : 0 – 1.8 Volts

(ii) Range Multiplier  : ×1  ;  ×0.1

(iii) Smallest direct reading : 0.001 Volts

(iv) Resistance : 100 Ohms/Volt

 

OSAW Vernier Potentiometer

OSAW Vernier Potentiometer
Technical Specifications:
(i) Range: 0 – 1.9Volts
(ii) Range Multiplier  : ×1   ;   ×0.1
(iii) Smallest direct reading : 0.00001 Volts
(iv) Resistance : 100 Ohms/Volt

    

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