General IRT657 User Manual

12:1 WIDE-RANGE

INFRARED THERMOMETER

WITH STAR BURST

LASER TARGETING

USER’S MANUAL

Star Burst Laser

Targeting

IRT657

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 –4

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

What’s in the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . 5 –7

Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installing the Battery . . . . . . . . . . . . . . . . . . . . . . 7

Operating Instructions . . . . . . . . . . . . . . . . . . . . 8 – 11

How To Make Accurate IR Measurements . . 9 – 11

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance and Troubleshooting Tips . . . . . . . . . 13

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . 14

Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . 15

Manual del Usuario . . . . . . . . . . . . . . . . . . . . . 16 – 30

Manuel de L'Utilisateur . . . . . . . . . . . . . . . . . . 31 – 45

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INTRODUCTION

Thank you for purchasing General Tools & Instruments’ IRT657
12:1 Wide Range Infrared Thermometer with Star Burst Laser
Targeting. Please read this user’s manual carefully and thoroughly
before using the thermometer.

The IRT657 is a compact, non-contact (infrared) thermometer
with a 12:1 distance-to-spot (D:S) ratio and a wide measurement
range of -40° to 1076°F (-40° to 580°C). These two key
specifications make the IRT657 ideal for various applications,
a few of which are listed below.

Using this IR thermometer, the temperature of a target can easily
be measured from a distance. This makes it possible to safely
measure the temperature of very hot or cold surfaces, hard-to­reach objects and toxic substances.

The IRT657 is especially suitable for the following four classes of
applications:

ELECTRICAL

• Checking the temperature of high-voltage equipment and
transformers from a safe distance

• Detecting excessive heating of motors, fuses, wires, insulators,
connectors, and switches

• Pinpointing hot spots in electrical connections and bearings

• Verifying temperatures of induction-heated parts

HVAC/R

• Monitoring food processing and storage temperatures

• Checking heating, AC and refrigeration system components

• Taking the temperature of forced hot air supply and return vents

• Testing chillers, steam traps and heat exchangers

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INDUSTRIAL/MRO

• Making temperature measurements on equipment during
maintenance, repair and operations (MRO)

• Performance testing of motors, turbomachinery and boilers,
including identifying overheated bearings, couplings and
conveyor belts

• Simplifying jobs such as laying asphalt or concrete and
checking fire protection systems

AUTOMOTIVE

• Detecting overheated electrical components, connectors and
wiring harnesses

• Pinpointing radiator core restrictions

• Testing temperature sensors, catalytic converters and exhaust
systems

• Measuring the temperature of oil, batteries, A/C systems and
tire treads

The IRT657 has a backlit LCD and is powered by a single 9V
battery. Thanks to the instrument’s auto power off feature, the
battery may last up to 50 hours when the backlight and laser
pointer are turned off.

CAUTION!

The IRT657 is a Class 3R laser product that emits less than 3mW
of radiation. Avoid looking directly at the laser pointer. U.S. law
prohibits pointing a laser beam at aircraft; doing so is punishable
by a fine of up to $10,000 and imprisonment.

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KEY FEATURES

• Measurement range of -40° to 1076°F (-40° to 580°C)

• 12:1 distance-to-spot (D:S) ratio

• Emissivity fixed at 0.95

• Measurements accurate within ±3°F (2°C) or ±2% of reading
(whichever is greater) for readings above 32°F (0°C); within
±5°F (3°C) or ±2% of reading (whichever is greater) for
readings below 32°F (0°C)

• °F or °C unit selectable on front panel

• Large (1.6 in. diagonal) backlit LCD

• Low (<30mA) power consumption when laser and backlight are
off; extends battery life

• Meets CE, RoHS and U.S. FDA standards

CAUTION: Use of controls or adjustments or performance of
procedures other than those specified herein may result in
dangerous radiation exposure.

WHAT’S IN THE BOX

The IRT657 comes in a blister pack along with a soft carrying
case, a 9V battery and this user’s manual.

PRODUCT OVERVIEW

Figure 1 shows all of the controls, indicators and physical features
of the IRT657. Figure 2 shows most of the icons and text that may
appear on the display. Familiarize yourself with the locations and
functions of these controls and the meanings of these display
icons before moving on to the setup and operating instructions.

5

Fig 1. The IRT657’s controls, indicators and physical features

A

B

C

D

A. Laser Pointer
B. Infrared Sensor/Lens
C. Measurement Trigger
D. Battery Compartment
E. Backlit Liquid-Crystal

Display

F. Button (laser on or off)

I
E

F
G

H

G. Button

(backlight on or off)

H. °C/°F Button (temperature

unit selection)

I. Laser Identification/

Certification/Warning/Safety
Labels (on left side); see
below

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