Extech TM300 Operating Manual

User's Guide

Dual Input J/K Type Thermometer

Model TM300

Introduction

Congratulations on your purchase of the Extech TM300 Digital Thermometer with K/J ­type dual input. This meter is shipped fully tested and calibrated and, with proper use,
will provide years of reliable service.

Features

1. Large backlit display shows any combination of T1, T2, T1-T2, plus MAX, MIN,
AVG.

2. Relative time clock on MAX MIN and AVG provides a time reference for major
events.

3. Electronic Offset function allows compensation of thermocouple errors to maximize
overall accuracy.

4. Readout in °C, °F, or Kelvin (K).

5. Auto Power Off mode (Sleep mode) increases battery life.

Safety

• To prevent personal injury or meter damage, use the meter only as specified in
this guide

• If the low battery indicator appears, replace the batteries immediately. Inaccurate
temperature reading could result from low battery voltage.

• Do not operate the meter in an explosive atmosphere

To avoid electrical shock or personal injury, do not apply more than

20Vrms between the thermocouple inputs or between the thermocouple

WARNING

and earth ground

2

TM300-EU-EN-V1.2 8/11