TESTO 400 Instruction Manual page 65

Due to pressure drops in the system, the measured volume flow may
be smaller than the actual volume flow. The measured volume flow can
be corrected via the flow rate correction factor. The flow rate correction
factor has a directly proportional effect on the measurement result and
is usually set at 1.00. Once the factor is changed, the result is multiplied
by the flow rate correction factor.
3 Click on Save.

Settings have been saved.
HVAC grid measurement
HVAC grid measurement
1 Activate
using the slider.

Detailed information about a standard-compliant measurement can be
stored in order to have the measurement assistant determine the
optimum immersion depth of the probe in the duct.
2
Determine the
3 Determine the
4
Determine the

A graphic with the number of inspection holes and measuring points is
displayed.
5 Click on Save.
Number of inspection holes (drilled
Number of measuring
Inspection hole position.
holes).
points.
9 Operation
65