Flowmeter Installation And Commissioning; Sensor Installation - Elis FLONET FN20xx.1 Series Design, Assembly And Service Manual

ELIS PLZEŇ a. s.

6. FLOWMETER INSTALLATION AND COMMISSIONING

The meter installation shall be performed in a strict observance of rules and procedures as described in this
manual.
To prevent undesirable interference, the power cables shall be laid at least 25 cm away from all signal
cables. The signal cables include the cable connecting the sensor with the transmitter (in case of a remote
meter version), output signal cables and the cable of the RS-485 communication line. All cables shall be laid
outside the thermal insulation layer on the piping (if any). Only shielded conductors shall be used to connect
the output signals and the RS-485 line where the shielding shall be connected to the earth potential on the
side of the master control system.
In applications where high levels of electromagnetic field interference at the measuring location can be
expected (e.g. in the vicinity of power frequency converters), the remote meter version should be avoided. In
these cases it is also recommended to include a filter in the power supply line to the transmitter.
Filter specification: The filter is intended to suppress dissemination of the undesirable high frequency
disturbances from the power supply cable to the flowmeter system. Use any commercial filter of suitable
parameters including protection class, and install it is close to the meter as possible. If need be, the filter can
be placed in a special protection housing. When installing the filter, observe the applicable safety
regulations.
Rated voltage:
Rated current:
Suppression characteristic:

6.1. Sensor installation

The measurement point chosen for the sensor installation should ensure that the internal part of the sensor
is fully flooded with the measured liquid at all times. If the sensor is mounted in vertical position, the only
permitted liquid flow direction is upwards. No thermal insulation shall be used on the sensor body.
If the flow meter is to be installed in a pipeline with thermal insulation, the insulation shall be removed at the
sensor insulation point.
The internal diameters of the piping, connecting flanges and the sensor tube shall be identical. The flange
faces shall be perpendicular to the piping. The inlet and outlet piping sections including seals shall be
perfectly aligned, with no protruding edges. In case of a non-conductive piping, use grounding rings on both
sides of the sensor.
The arrow on the sensor body indicates the required liquid flow direction (positive flow direction).
Upon loosening the four bolts holding the transmitter housing in position on the sensor body, the housing can
be rotated through ±180°. The same system for the housing rotation can be used if the housing is mounted
on a bracket attached to a vertical support plate or wall.
Do not expose the transmitter housing to direct sunlight; if installed outdoors, use a suitable protection
shield.
ELIS PLZEŇ a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, Phone: +420/377 517 711, Fax: +420/377 517 722
Design, Assembly and Service Manual
Electromagnetic flowmeter FLONET FN20xx.1
250V/50Hz
0.5A and more
10kHz: 10 to 20dB
10MHz: 40dB
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Es90420K/c