Volume Flow - K-Factor - TESTO 400 Instruction Manual

11 Click on Stop.

Values currently being measured are displayed. You now have three
options to proceed.
Start: start another measurement.
12
Or:
New: launch a new measurement. The current measurement will be
deleted along with all readings (a warning is displayed).
Or:
Save: exit the current measurement and save all readings on the testo
400 (see Section 9.6).

Volume flow - k-factor

9.4.8
The testo 400 can determine the volume flow by measuring the reference
resistance and input of the K-factor. This allows the testo 400 to remain
connected to the air outlet during adjustment work and the changes in volume
flow can be read directly on the display.
This process for determining volume flow can always be used when there are
appropriate specifications available from the component manufacturer. In line
with these specifications, the differential pressure is measured at a position
specified by the manufacturer or supplier. The volume flow is determined from
the differential pressure via a component-specific k-factor using the following
mathematical equation:
Volume flow
Measured differential pressure in Pa
System-specific conversion factor
1
Click on

Main menu opens
2
Click on Measure.
3 Click on Volume flow -

The Volume flow - k-factor measurement menu opens.
.
k-factor.
9 Operation
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