Funnel Volume Flow Application [Funnel Volume Flow] - TESTO 440 Instruction Manual

For measurements in flows with a known direction, the arrow mark on
the probe head must point in the direction of flow.
2 Move the probe into the flow.
3
Align the probe with the assumed flow axis.
4 Read off the readings.
Low flow velocities may result in greater measurement uncertainty
during temperature and humidity measurement.
5 Carry out the measurement and save the measuring values.
3.5.6 Funnel volume flow application
Volume Flow]
A volume flow rate funnel is required to determine the flow rate on ventilation
systems. The measurement can be carried out with a compatible vane probe in
conjunction with a funnel set. Alternatively, a thermal anemometer can also be
used in conjunction with a funnel.
The funnels differ in size. When selecting the funnel, make sure that the
opening of the funnel covers the grille completely and tightly.
The application menu is enabled by one of the following probes:
Order number
0635 1032
0635 1571
0635 1572
0635 9571
0635 9572
0635 9371
Name
Hot wire probe including temperature sensor, fixed
cable
Hot wire probe with Bluetooth
and humidity sensor
Hot wire probe including temperature and humidity
sensor, fixed cable
Vane probe (Ø 16 mm) with Bluetooth
temperature sensor
Vane probe (Ø 16 mm) including temperature sensor,
fixed cable
High-precision vane probe (Ø 100 mm) with
®
Bluetooth , including temperature sensor
3 Operation
[Funnel
®
, including temperature
®
, including
31