© PCE Instruments
26
5.1.2
Velocity measurement
Besides measuring the differential pressure, the device can also measure the air velocity. When
doing so, the device uses standard conditions (21.1 °C; 1013 mbar).
To measure the air velocity, follow these steps:
1.
Press “
P/V/F
” to get to the velocity mode (“VEL”). In velocity mode, press “
Unit
▼
” to
change the measuring unit. You can switch between km/h, m/s, ft/min, MPH and
knots.
2.
Connect the “Input (+)” connection of the flow meter to the total pressure connection
of the Pitot tube by using the white tube and connect the “Ref (-)” connection of the
device to the static pressure connection of the Pitot tube by using the black tube (see
picture below). Let the device stable under ambient conditions and press and hold
“
Hold/Zero
” for 2 seconds to zero the display.
3.
When taking a measurement, place the tip of the Pitot tube against the wind. Make
sure that the axis of the Pitot tube is aligned with the air flow (it should not deviate for
more than ±10 °).
The primary display now shows the air velocity. If the display shows negative values
or “Error”, please check if the tubes are connected properly.
En
g
li
s
h
