Extech 445580 - Manuals

445580-EU-EN v3.6 07/13 2 Operation Press the ON/OFF button to turn the meter ON. After a 5 second initialization, the Relative Humidity reading will appear in the upper display and the Temperature reading will appear in the lower display. Allow time for measurement readings to stabilize when moving...

445580-EU-EN v3.6 07/13 3 Calibration and Verification Procedures The following procedures require 33% & 75% RH references available through Extech. Verification (Checking the 33% or 75% RH Calibration) Skip the verification and go directly to the Cal procedure below if it has already been deter...

445580-EU-EN v3.6 07/13 4 Battery Replacement Use a coin to remove the battery compartment cover on the rear of the meter. Replace the 2032 lithium battery; install the new battery face up (+) in the battery compartment. You, as the end user, are legally bound ( Battery ordinance ) to return all use...