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.
Meter Description 1 Meter 1. T1 Thermocouple input connector 2. T2 Thermocouple input connector 3. Function buttons (Hold, MAX/MIN, Set) 4. Function buttons (Power, Enter,T1 T2 T1-T2, C-F-K) 5. Battery compartment (rear) 3 4 5 1 Display 2 1. Setup mode 2. Hold mode 3. Auto power off mode active T1 4. Upper display: T1, T2 or T1-T2 reading T2 5. Temperature units T1 6.
Operation Connecting thermocouples 1. This meter accepts one or two K or J-type thermocouples with spade lugs (subminiature type with one spade wider than the other). 2. Plug the thermocouple(s) into the meter's thermocouple input jack(s). Measuring 1. Press the button to turn on the thermometer on. After 1 second the thermometer will display the T1 reading in the upper display and the T2 reading in the lower display. The display will indicate dashes (----) if no thermocouple is connected to the input.
Setup Mode Options Use the Setup mode to select the thermocouple type, program a display offset, or disable/enable the sleep mode. The thermometer stores the settings in its memory. Press and hold the SET button for 3 seconds to enter or exit the Setup mode. When the thermometer is in Setup mode, the display shows the SETUP icon. Use the ENTER buttons or the arrow buttons to scroll through the “TYPE”, “SLP” (sleep mode), and “T1/T2” (offset) parameters. Set Type J or K thermocouple 1.
Replacing the Batteries If the low battery icon appears, replace the batteries immediately to avoid inaccurate readings. 1. Turn off the thermometer. 2. Loosen the screw and remove the battery door. 3. Replace the AAA batteries. 4. Replace the battery door and tighten the screw.
