Table of Contents

Title

Page

Introduction

1

Contacting Fluke

1

Safety Information

2

Features

3

Display

4

Buttons and Connector

5

How the Thermometer Works

6

Operating the Thermometer

6

Locating a Hot or Cold Spot

6

Distance and Spot Size

6

Field of View

7

Emissivity

7

Switching Between °C and °F

8

Using the Contact Temperature Probe

9

HOLD

10

Typical Measurements

10

Measuring Heating/Cooling Duct Insulation Jacket Temperature

10

Measuring Dewpoint Temperature

10

Testing Insulated Return Ducts

11

Scanning Walls for Air Leaks or Insulation Deficiencies

11

Testing Contactors (Starters)

12

Testing Enclosed Relays

12

Testing Fuses and Buss Connections

12

Testing Electrical Connections

12

Testing Bearings

13

Testing Belts and Sheaves

13

Checking Hydronic Radiant Heat Applications

14

Testing Radiant Heat Applications

14

Testing Water Heater Insulation

14

Testing Steam Traps

14

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Fluke 561 user manual Table of Contents