Turbulence Measurement Application [Draft Rate] - TESTO 440 Instruction Manual

3 Operation
Carrying out the measurement
A suitable probe is connected to the measuring instrument.

1 Take a humidity measurement in the room.
2
Take a temperature measurement at the spot where there is a
presumed risk of mold.

The risk of mold is indicated by a colour indicator on the display.
3 Save the measurement.
3.5.11 Turbulence measurement application
Rate]
With this application menu, the measurement of the degree of turbulence and
draft can be determined in accordance with DIN EN 13779 or DIN EN ISO
7730.
The measurement is carried out automatically over a period of 3 minutes. For
ideal implementation, we recommend the use of:
Order number
0554 1590
The application menu is enabled by the following probe:
Order number
0628 0152
The probe requires a warm-up period of around 3 seconds after
connection to the testo 440. Carry out the measurement after this.
The display shows the draft rate using the traffic light system.
Display
Green
Yellow
Red
40
Name
Measuring tripod for comfort level measurements with
standard-compliant positioning of probes (including
case)
Name
Turbulence probe, fixed cable
Meaning
Draft rate 0-20%
Draft rate 21-30%
Draft rate 31-100%
[Draft