The Extech 421502 Digital Thermometer has dual input capabilities and can display T1, T2, and T1-T2 temperature readings. The maximum temperature record mode records the highest temperature. It supports selectable units and data hold functions.
This document is the User's Guide for the Extech Model 421502, a professional digital thermometer featuring dual thermocouple inputs (Type J and Type K). It supports dual display configurations, including individual readings for T1 and T2 or the difference between them (T1-T2). The device includes features such as Min/Max/Average recording, relative mode, programmable HI/LO alarms, and an elapsed timer.
| Display | 5 digit LCD multifunction display |
|---|---|
| Battery | NEDA 1604, IEC 6F22, or 006P 9VDC battery |
| Auto Power off | approx. 30 mins. of inactivity |
| Battery life | 160 hours typical with carbon zinc battery |
| J TC Range | -328 to 1922 o F (-200 to 1050 o C) |
| K TC Range | -328 to 2498 o F (-200 to 1370 o C) |
| Resolution | 0.1 o C or 0.2 o F |
| Accuracy (C) | ±(0.05% rdg + 0.3 o C) -50 o C to 1370 o C |
| Accuracy (F) | ±(0.05% rdg + 0.6 o F) -58 o F to 2498 o F |
| Reading rate | One reading per second |
The thermometer supports Type J and Type K thermocouples.
Press the "C/F" key to toggle between o C and o F temperature units.
Press the "Hold" key to freeze the MAIN DISPLAY temperature value.
The battery life is 160 hours typical with a carbon zinc battery.