Initial Operation; Mechanical Assembly; Preparation - TESTO 6448 Instruction Manual

5 Initial operation

5 Initial operation
5.1.

Mechanical assembly

5.1.1.

Preparation

Determining the installation point
The installation point should be easily accessible and experience
only low vibrations. The ambient temperature must not exceed the
values specified in the technical data (pay attention to possible heat
radiation).
Please note that a clearance of at least 400 mm is required for de-
installation of the sensor. When planning the measuring point, this
is in addition to the space required for the measurement fitting or
tap of at least 95 mm, or the space for the existing fittings (also in-
cluding possible reductions to DN 15).
During assembly, consider the flow direction and required in-
flow/outflow routes.
Also consider the installation point with regard to the specified
technical data. The medium may not be in a condensed state at the
installation point. For this reason, the location in a working com-
pressed air network can only be behind a suitable compressed air
dryer which provides a suitable pressure dew point; otherwise the
specified measurement accuracy is not guaranteed.
Required measurement route
Bear in mind the required inflow and outflow routes in order to
achieve the specified measurement accuracy. The inflow route re-
fers 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.
Total measurement route = inflow route + outflow route
Outflow route = 5 x D
Inflow route = 5 x D + B
D = pipe diameter [mm]
B = additional cushioning route
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