Selecting Application Menus; [Volume Flow] - TESTO 440 Instruction Manual

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4 Operation

4.5.4 Selecting application menus

The testo 440 has permanently installed application menus. These enable the
user to carry out convenient configuration and implementation of specific
measuring tasks.
Available application menus are enabled as soon as a probe is
connected. Unavailable application menus are greyed out on the
display. More than one probe has to be connected to make some
application menus accessible.
The units for the measuring values depend on the ISO/US setting and
configuration in the Basic View.
4.5.5 Volume flow application
Use this application to measure the volume flow at the outlet or in a ventilation
system duct. There are different options for this. These mainly differ in the
measuring range and require corresponding probes:
• Thermal probes (including temperature measurement and possibly humidity
measurement) for low flow velocities
• 16 mm wheel measuring head (including temperature measurement) for
average flow velocities
•
Pitot tube for measurements at high velocities and in heavily contaminated
flows with a high particle content
This application menu is accessed 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
and humidity sensor
0635 1572 Hot wire probe with Bluetooth
and humidity sensor
0635 1026 Hot wire probe (Ø 7.5 mm), including temperature
sensor, fixed cable
0635 1051 Hot wire probe (Ø 3 mm), including temperature
sensor, fixed cable
0635 9571 Vane probe (Ø 16 mm) with Bluetooth
temperature sensor
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[Volume Flow]

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