User's Guide
Datalogging / Printing Anem
Psychrometer
Model 451181
Introduction
Congratulations on your purchase of the Extech 451181 Datalogging / Printing
Anem Psychrometer. This device simultaneously measures and displays Air
Velocity, Temperature, Humidity, Wet Bulb Temperature, and Air Volume (CFM / CMM).
The datalogger stores 2400 readings in Automatic Recording mode and 99 readings in
Manual Recording mode. The Printer provides a hard copy of individual readings while
the PC software permits downloading of data for use in spreadsheets, database, and
other programs. This meter is shipped fully tested and calibrated and with proper use will
provide years of reliable service.
