TESTO 0699 6446 Series, Инструкция по эксплуатации

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5 Installation
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5.3.1 Installation position
Do not install the electronic sensor assembly in the crossed-out installation
positions shown in the following graphic. In the event of a limited flow, the
specified accuracy cannot be maintained.
The arrow shows the direction of flow for the medium.
5.3.2 Required measurement route
Bear in mind the required inflow and outflow routes in order to achieve the
specified measurement accuracy. The inflow route refers to the pipeline
length in front of the mass flow sensor and the outflow route to the pipeline
length behind the mass flow sensor, as seen in the direction of flow for the
medium.
route Outflow + route Inflow = stretch t measuremen Total
D
× =
5 route Outflow
B D
+ × =
15 route Inflow
90° elbow B = 5 x pipe diameter (D)
two 90° elbows
one level B = 10 x pipe diameter (D)
two 90° elbows
two levels B = 15 x pipe diameter (D)
Valve, slider B = 35 x pipe diameter (D)
D = pipe diameter [mm]
B = total stilling pipe