USER GUIDE Portable Thermometers Model TM20 thermometer with standard probe Model TM25 thermometer with penetration probe 1 TM20-TM25-EU-EN V1.
Introduction Thank you for selecting this Extech Portable Thermometer for home use. This device is intended for use in measuring the temperature of air, liquid, paste, or semi‐solid materials. The TM20 uses a standard temperature probe while the TM25 is equipped with a penetration probe for insertion into materials under test. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.
Caution! Risk of Injury! o o o o o Keep these products, their probes, and batteries out of the reach of children and pets Use extreme caution when handling the probes Batteries must not be placed in fire, short circuited, taken apart, or discharged. Risk of explosion! Batteries can be fatal if swallowed. Contact medical emergency personnel if batteries are swallowed. Batteries contain harmful acids. Low batteries should be changed as soon as possible to prevent damage caused by leaking batteries.
Description Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Meter LCD display Power ON/OFF button MAX/MIN button ALARM/SET button Temperature units/up arrow button Meter stand/base Sensor cabling Sensor tips Probe mounting bracket Note: Wall mount access hole and magnet on rear of instrument not pictured Advanced Display Symbols 1. 2. 3. 4. 5. Low battery symbol Alarm symbol Flashing Alarm Alert High Alarm symbol Low Alarm symbol 4 TM20-TM25-EU-EN V1.
Operation Display Protective Foil The meter’s display is shipped with a protective foil covering. Please remove carefully before use. Powering the meter Open the battery compartment by loosening the two screws located on the back of the meter (on either side of the magnet). Insert a new CR2032 3V lithium button battery and close the cover. If a battery is already installed, remove the insulation strip so that the battery can make proper circuit contact. The instrument is now ready for use.
Temperature Alarms Set high/low alarm limits and the meter will audibly and visually alert the user if either limit is exceeded. To set the alarm values, follow these steps: 1. Press the ALARM/SET button once from the normal operating mode; the upper limit value and its symbol (up arrow) will flash. 2. Set the temperature limit by pressing the ▲ button (press and hold for fast scrolling). 3.
