Lab - Temprature Assignment

1 INTRODUCTION

As practically every material used in engineering design is affected by temperature, its measurement is significant. A thermometer is a commonly used instrument used to measure the difference or change in temperature. A thermometer shows the change of a physical property of a substance, caused by a change in heat to indicate the temperature. There are different types of thermometer that are used to perform in different operations such as:

1. electrical effects

2. expansion effects

3. radiation effects

2 AIM

The objective of this experiment is to achieve understanding of how a thermometer works and how it is used. Also to understand the following features of temperature measurement:

• Engineering applications

• Characteristics of scale graduation and range, ease and accuracy of reading, sensitivity, response, expected accuracy

• Method of procedure

• Any particular technique of use i.e. zero adjustment, depth of immersion, time dependence, etc

3 EQIPMENT

Different equipment is used while carrying out the investigation.

3.1 Hot Water Bath

A Dewer Flask with a lid and an additional heater. By default the temperature controller is set at 100°C.

3.2 Heated Metal Furnace

This is made of a brass block fitted with a resin-cloth. Its electricity is supplied by a transformer.

3.3 Ice bath

This is also a flask containing an insulated lid made of resin-cloth

3.4 Digital resistance Ohmmeter and thermocouple mV meter

This equipment is used as digital resistance ohmmeter and a thermocouple mV meter.

1. Direct Thermocouple Input

2. Resistance Thermometer

3. Heated Metal Furnace

4. Ice Bath

5. Water Bath Controller

6. Hot Water Bath