TESTO 440, Инструкция по эксплуатации

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3 Operation
31
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 [Funnel
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 Name
0635 1032 Hot wire probe including temperature sensor, fixed
cable
0635 1571 Hot wire probe with Bluetooth
®
, including temperature
and humidity sensor
0635 1572 Hot wire probe including temperature and humidity
sensor, fixed cable
0635 9571 Vane probe (Ø 16 mm) with Bluetooth
®
, including
temperature sensor
0635 9572 Vane probe (Ø 16 mm) including temperature sensor,
fixed cable
0635 9371 High-precision vane probe (Ø 100 mm) with
Bluetooth
®
, including temperature sensor