TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
What’s in the Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Install Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 8
Basic Operation in Scan Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 – 6
Accounting for Emissivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Other Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 8
Other Display Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Appendix I: How to Make Accurate IR Measurements . . . . . . . . . . . . . . 10 – 11
Appendix II: Emissivities of Common Materials. . . . . . . . . . . . . . . . . . . . . . . . 12
Manual del Usuario en Español . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 – 24
Manuel de L'utilisateur en Français . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 – 38
INTRODUCTION
Thank you for purchasing General Tools & Instruments’ IRT850K 50:1 Ultra-Wide Range IR
Thermometer with “K” Port. Please read this user’s manual carefully and thoroughly before using
the instrument.
The IRT850K is a specialized instrument that can measure the temperature of a very hot or cold
object or surface (the target) by using an IR sensor to measure its thermal radiation from a safe
distance. Dual laser beams help define the size of the target. With a distance-to-spot (D:S) ratio
of 50:1; the IR sensor can measure the temperature of a target (spot) 1 ft. in diameter from 50 ft.
away with a basic accuracy of ±1.8°F near room temperature and an accuracy of ±(2% of the
reading or 3.6°F) elsewhere in the measurement range. The IRT850K’s IR measurement range is
-76° to 2732°F (-60° to 1500°C).
The IRT also has a socket for an optional “K” type thermocouple probe with a measurement
range as wide as -83.2° to 2552°F (-64° to 1400°C).
The IRT850K is designed for use in heavy industrial sectors such as steel and chemical
manufacturing, petroleum refining, steam generation, and power generation and transmission.
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