General-tools-and-instruments DCFM8906 v.1 Manuel d'utilisateur télécharger pdf (Page 10)

DIRECTION OF AIRFLOW

Fig. 2. The meter’s default initial display after being

powered on

To make an air speed measurement, place the meter in the

airstream leaving the HVAC system duct or register. Be sure to

orient the meter so its vanes are centered in the stream and

its axes are as perpendicular to the stream as possible

(Fig.3).

Fig. 3. How to orient the meter

The upper display will read out the real-time air speed in

units of ft/m.

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General-tools-and-instruments DCFM8906 v.1 Manuel d'utilisateur Page 10