Recommendations for installation
To avoid any measurement errors which are caused by air bubbles or failures on the lining, pay attention to
the following recommendations:
During assembling correctly seat the sensor, tighten screws uniformly and move on a diagonal one
after another.
It should be noted that the parallelism of flanges has a greater effect on packing than excessive
tightening forces on curved and seated flanges.
The sensor must be installed inside piping so that the axis of sensor electrode is always horizontal.
A PTFE (teflon) lining calls for extra care during handling and assembly. During installation/operation
avoid excessive under pressure in pipes. Please do not change and damage the outlet extension on
both ends of the sensor. The sensors are shipped from the factory with special covers to avoid any
shape deformations. (PTFE elastic memory should cause a partial compensation in future). Please
remove the covers just before installation, and when you insert it between counter flanges, replace
by a number of smooth metal sheet pieces which are removed just before tightening the bolts.
Packing –The extended part of lining does not operate properly as a seal, hence appropriate packing
must be inserted between sensor and pipeline. If the packing protrudes into a flow profile at any point,
this will cause turbulence and reduce the measurement quality.
During installation, make sure the sensor slides into piping if the pipeline is not flexible enough. It is
recommended that installation inserts (especially for greater internal diameters) should be used.
During installation of the sensor, counter flanges must not be welded (danger of the sensor lining
failure).
Sensor grounding
For reliable and proper operation of the inductive meter, it is necessary to use high-quality protective
grounding. Internal flowmeter cables and power supply PE (PEN) conductors provide protective
grounding. Working grounding is also provided via internal cables and a high-quality connection of the
sensor body with two metal pipe counter flanges. It is recommended that a connection made with M6
welded screws or bored threaded holes is used. The connection under flange fixing screws is not
recommended because of possible corrosion resulting in measurement failures.
When assembled into piping made from non-conductive material (or with non-conductive lining), it is
necessary to provide working grounding with liquid by a different method, e.g. by grounding rings –
valid for DN 10 ÷ DN 40. The rings can be ordered from factory, their material and chemical resistance
must comply with the liquid to be measured –usually produced from the same material as sensor
electrodes. The flowmeters from DN 50 ÷ DN 1000 are equipped of grounding electrode. Function of
grounding electrode is same as grounding ring.
When assembled, it is necessary to insert the packing on both sides of the grounding ring. Make sure
that no parts will protrude into an internal sensor profile (turbulence).
Drawing of sensor working grounding inside pipeline
Use of grounding rings –valid for DN 10 ÷ DN 40
