Xylem IQ SensorNet ViSolid 700 IQ (SW) - Manual (Page 20)

Commissioning ViSolid
®
700 IQ (SW)
3 - 8 ba76040e02 07/2013
3.4.2 Measurement in pipelines
Note
If there is a low level of total suspended solids (< 2000 mg/l SiO2 or
< 1000 mg/l TSS), the effects of the measurement environment can
simulate a higher content of total suspended solids. The effect of the
measurement environment can be reduced by ensuring the optimum
conditions (see section 3.3.1).
Note
If an optimum installation is not possible due to the structural conditions
at the measuring location (e.g. in narrow pipelines), the effects of the
measurement environment can be compensated by user calibration
(see section 4.2.4).
If deposits occur on the pipe walls, the calibration should be repeated
at regular intervals.
Example:
45 ° pipe installation
The pipe should be straight for a length of approx. 25 cm beyond the
installation location. Angled or tapered pipes can cause interference
effects in the case of low levels of total suspended solids.
Fig. 3-5 Total suspended solids sensor in the pipe with EBST 700-DU/N flow-thru
adapter
Fig. 3-5 shows the installation of the EBST 700-DU/N flow-thru adapter
for installation in a pipeline (DN 50). The infrared beam points in the
opposite direction to the direction of flow. The marking on the sensor
points towards the pipeline (see Fig. 3-5).
Note
For exceptions to the direction of flow, see section 3.3.2 F
LOW
DIRECTION .
ADA-DF 9
EBST 700-DU/N
ca. 25 cm
straight pipe
Marking aid
in this direction
Swivel nut
Infrared beam
Direction
of flow