General Tools and Instruments HWA4204HA - Manual (Page 8)

6) a. Slide the sensor cover to the down position, let the air
velocity sensor to contact the air, refer Fig. 3.
b. Extent the telescope probe to the convenient length,
refer Fig. 4
air velocity sensor
( do not touch by
fingers or tools )
" Sensor cover "
slide to the low
position when
make the
measurement
Probe Handle
Fig. 3 Fig. 4
Caution !!!
Do not use the fingers or any tools to
touch the air velocity sensor, otherwise
the meter may have permanent
damage.
6