The Extech 45170CM measures Air Flow, Air Velocity, Relative Humidity, Temperature, and Light Level. This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of this User Guide, Product Updates, and Customer Support.
Auto Power OFF
The meter will automatically turn off after 10 minutes if no keys are pressed during this period. Note that the Auto power off function is disabled in the Max/Min recording mode.
When the low battery icon appears or when the meter will not switch ON please replace the battery. The battery compartment is located on the back of the meter, secured by a Phillips head screw. Open the compartment and replace the 9V battery observing correct polarity. Do not switch the meter ON until the battery compartment is secured with the screw.