Siemens SITRANS F M Intermag 2, Руководство по эксплуатации

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Installation
3-6
SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
<
8°
d
A
d
R
By reducing line cross sections you
have the possibility of installing smaller
sensors in pipes of larger rated widths.
This has the advantage that the speed in
the sensor increases with small flows and
thus a better measuring accuracy is achieved.
To avoid the formation of eddy currents in the sensor, the angle of reduction should not be greater
than 8
° .
You also have to note that reductions cause losses in pressure.
d
1
d
2
< 8°
Figure 3-7 Example of reduction of a line cross section
3.2.3 Probes
The S1 and S2 probes can be connected to the SITRANS FM
Intermag 2.
A data sheet in which you can read the appropriate installation
instructions is enclosed with these probes.
3.2.4 Accessories
Protective discs, grounding rings and protective rings (orifice
protectors) are offered as accessories.
The protective discs are fitted permanently as a standard on all
PTFE-coated sensors to protect the coating.
Protective rings (orifice protectors) protect the inlet and outlet edges of
the sensor against mechanical damage especially when used with
corrosive media.
Grounding rings serve to establish the reference potential of the sensor
in electrically isolating pipes.