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Design, Assembly and Service Manual
Page 16 of 44
Induction flow meter FMG600 series
6. FLOW METER INSTALLATION AND OPERATIONAL START
The meter installation work shall be performed in strict observance of the procedures and rules described
in this manual.
To prevent undesirable interference, the power cables shall be laid at least 10“ (25 cm) away from all signal
cables. The signal cables include the cable connecting the sensor and the associated electronic unit (in the
case of a remote meter version), signal output cables and the cable of the RS 485 communication line. All
cables shall be laid outside the thermal insulation layer on the piping. Only shielded conductors shall be used
to connect the output signals and the RS 485 line where the shielding shall be connected to the ground
potential only on the side of the 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 electronic unit.
Filter specification: The filter suppresses spread of the undesirable high frequency disturbances from power
supply cable into the flow meter. It is possible to find standard product of any filter producer. Use filter with
desired protection, or install filter inside of the box with protection. Filter should be as near to the converter,
as possible. Keep all security standards.
Operating voltage:
115 V/60 Hz (250V/50Hz)
Nominal current:
0,5A and more
Losses:
10 kHz 10 to 20 dB
10MHz
40dB
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. Any, if partial, emptying or aeration of sensor
in operation shall be avoided. 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.
Sensor must never be under thermal insulation. If flow meter is installed in the pipeline with thermal
insulation, this insulation must be interrupted and sensor must be out of the insulation.
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 input and output piping sections including seals shall be
perfectly aligned, with no protruding edges. In the case of a non-conductive piping, use grounding rings
on both sides of the sensor.
The arrow on the sensor body shall indicate the liquid flow direction (positive flow direction).
Upon loosening the four bolts holding the electronic unit box in position on the sensor, the box can be rotated
through ±180°. The same system for the box rotation can be used if the box is mounted on a bracket
attached to a vertical support plate or wall.
Do not expose the electronics box to straight sunshine, for outdoor installation use cove or shield - it is
not in the normal scope of supply.