1 / 9

TEMPERATURE MEASUREMENT

TEMPERATURE MEASUREMENT. MR. VISHAL VASISTHA ASSISTANT PROFESSOR (ME) DRONACHARYA COLLEGE, GURGAON. INTRODUCTION. It is defined as : measure of the “ quality of heat” correlates to molecular kinetic energy . THERMOCOUPLES.

amandla
Download Presentation

TEMPERATURE MEASUREMENT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. TEMPERATURE MEASUREMENT MR. VISHAL VASISTHA ASSISTANT PROFESSOR (ME) DRONACHARYA COLLEGE, GURGAON

  2. INTRODUCTION It is defined as : • measure of the “quality of heat” • correlates to molecular kinetic energy.

  3. THERMOCOUPLES • Working on the principle of SEEBECK EFFECT - “The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference (few mV per 10K)between the two substances.” • Measuring potential difference requires attaching leads and a voltmeter

  4. TYPICAL THERMOCOUPLE CONFIGURATION Voltmeter Metal A Metal A Metal B Solid Liquid Unknown temperature Reference temperature (slush bath)

  5. THERMOELECTRIC CIRCUIT Display unit Metal B Metal B EMF Current Metal A J-1 (Hot junction) J-2 (Cold junction)

  6. THERMOCOUPLES • Seebeck effect • If two wires of dissimilar metals are joined at both ends and one end is heated, current will flow. • If the circuit is broken, there will be an open circuit voltage across the wires. • Voltage is a function of temperature and metal types.

  7. THERMOCOUPLES • The relationship of potential difference with temperature -

  8. THERMOCOUPLE TYPES

More Related