ELIS PLZEŇ a. s.
Project design, installation and service manual
Page 49 of 72
Electromagnetic flowmeter FLONET FH30xx
ELIS PLZE
Ň a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, phone.: +420 377 517 711, fax: +420 377 517 722
Es 90678K
9.3.2 Flowmeter FLONET FH30xx
– increased measurement accuracy
For zero flow-rate setting and reference conditions:
Relative error
Flow rate range
±0.5%
of the measured value
5
–100% Q
4
±0. %
of the measured value
10
–100% Q
4
Upon agreement with the manufacturer, flowmeters may be supplied with other (optional) accuracy
parameters.
10 METER DESIGN DETAILS
10.1 Transmitter
Transmitter C14.00/C15.00 is fitted in a box made of aluminium alloy with removable front and rear covers.
Behind the window in the front cover there is a backlighted OLED display of 128x64 pixels. The
flowmeter control is facilitated by optical buttons (optical reflex sensors) actuated by touching the
respective spots on the front window.
The transmitter terminals can be accessed upon removal of the solid rear cover. When closed, the lid
position is secured by means of an Allen bolt.
External cables can be brought into the terminal compartment via two glands accommodated in threaded
holes M20 x 1.5. Should the meter configuration or higher number of output signals require so, inserted
in the cable gland can be a sealing insert with more holes to hold the required number of cables.
This sealing insert is not included among the standard meter accessories.
Located at the top of the transmitter box is a grounding bolt and a flat area intended for the flowmeter rating
plate. The transmitter plate is attached to the rear cover on the transmitter housing.
The surface finish of the housing consists of powder paint coating.
The connections of the transmitter terminals are described in Chapter 5 (ELECTRICAL CONNECTIONS).
The transmitter for the compact meter version (including a sensor of protection class
IP67)
is supplied with the signal cable attached.
The transmitter for the remote meter version (used in combination with a sensor of
protection class IP 68)
is provided with a connector for the signal cable connection. The other
end of the signal cable is attached to the sensor where the terminals inside the hermetic
connection box are embedded in an insulating compound.
10.2 Sensor
The induction sensor consists of a measuring tube made of non-magnetic steel with insulation lining,
two measuring electrodes and, in some cases, one grounding electrode. Located outside the measuring
tube is a winding the function of which is to generate electromagnetic field perpendicular to the
measuring electrode axis. The excitation winding and measuring electrodes are protected by the sensor
housing made of carbon or stainless steel. In its standard design version, the sensor is provided with
flanges according to EN 1092-1 or ANSI B16.5. Upon agreement with the manufacturer, other types of
flanges can be provided.
The sensor can also be supplied in all-stainless-steel design.
