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Introduction
Congratulations on your purchase of the Extech 42280 Thermometer and Relative Humidity
Datalogger. The 42280 is a wall-mount, tripod mount, or desktop indoor air quality monitor with an
internal memory capable of storing 16,000 readings (8000 temperature readings and 8000 relative
humidity readings) that can later be transferred to PC using the USB interface. Real-time meter-
to-PC logging is also supported. This meter is shipped fully tested and calibrated and, with proper
use, will provide years of reliable service.
Material list
Supplied Materials
Meter
User Guide
USB cable
Program CD
Four (4) batteries; 1.5V 'AA'
9V adaptor
Optional accessories
Calibration bottles (33% and 75%) for Relative Humidity Calibration
Features
Large LCD display shows temperature, humidity, and date/time clock simultaneously
16,000 internal memory capacity (8000 temperature; 8000 RH%)
Visual and Audible (with 117V AC adaptor only) Alarms
Easily configure datalogger through the keypad or via PC interface
USB PC interface with Windows
Wall mount, tripod mount, or for desktop use
TM
software
2
42280-EU-EN-V4.4-12/11
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