Required Measuring Section; Direction Of Flow - TESTO 6446 Instruction Manual

Required measuring section

5.4
Note
Total measurement section = inflow section + outflow section
Outflow section = 5 x D
Inflow route = 15 x D + B
D = pipe diameter [mm]
B = additional calming section

Direction of flow

5.5
Note
20
Take account of the required inflow and outflow section in
order to achieve the specified measuring accuracy. The
inflow section refers to the pipeline length upstream of the
compressed air meter and the outflow section to the
pipeline length downstream of the compressed air meter,
as seen in the direction of flow for the medium.
Changes to the
pipe diameter
90° elbow
Two 90° elbows, one level
Two 90° elbows, two levels
Valve, slider
Always take the direction of flow into account when
installing the measuring station. This is indicated by the
arrow engraved on the side of the measuring station. The
arrow points in the direction that the medium flows in the
pipeline.
B = 5 x pipe diameter
B = 5 x pipe diameter
B = 10 x pipe diameter
B = 15 x pipe diameter
B = 35 x pipe diameter