Flowmeter SVTU-11B, Руководство по эксплуатации

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FS installation in places with possible short-term water flooding is allowed while ob-
serving following protection measures for FS and entrance cables:
−
the lining of cables should be made in protective waterproof pipes, which are resis-
tant to influence of an environment (including the increased temperature);
−
area for connection of protective pipes to ultrasonic flow sensors or RTD should be
protected from water influence by means of tight clutch, profile sealants or other ways rec-
ommended by the manufacturer of protective pipes
9.3 Requirements to FS installation and arrangement
FS should be installed into a pipeline.
FS installation place should be as much as possible moved away from sources of vibra-
tions, jolting, electromagnetic interferences (electromotors, pumps, compressors, etc.). No
electric voltage relative to a protective contour of grounding in the place, where FS should
be installed
The distance between flow measurement section and an installation place for the calcu-
lator should be minimal and not exceed 10 m. It is possible to increase the distance up to 30
m by agreement with the manufacturer.
In all cases it is necessary to provide full filling of flow measurement section with wa-
ter otherwise meters stop functioning, and malfunction (see chapter 13 of OM) would be di-
agnosed.
Flow measurement sections can be installed in vertical position, however submission of
the water thus should be carried out in a direction bottom-top for providing FS with water
filling.
Water meter operation in special conditions (incomplete filling of FS with the water or
polluted water) determines its location as resulted in figure 9.1. In this case complete water
filling of FS is guaranteed. The most polluted pipeline section appears in a place below FS
FS
Horizontal
15
−
20
°
Drain
valve
Figure 9.1
To remove water from the bottom part of the pipeline (see figure 9.1), it is possible to
provide the drain valve.
Please follow the requirements resulted below while installing FS:
−
the pipeline section chosen for FS installation, should be located in horizontal plane
(a deviation from a horizontal within the limits of
±
20
°
).
−
bushes for flow sensors are also arranged in horizontal plane with a deviation from a
horizontal line no more than
±
20
°
.
Minimal straight pipe distances downstream of flow disturbances in accordance with
specified meter accuracy should be not less than mentioned in the Table 9.1: