Vaisala HMW90 Serie Guide Rapide page 9

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Installing the Mounting Base
Use the mounting holes to attach the mounting base
securely. Use at least two screws (not included). The
arrow on the mounting base must point straight up
after installation. Proper orientation is important: air
must flow through the vents on the bottom and top.
EN
59.5
29.8
30.5
7