ELIS PLZEŇ a. s.
Design, Assembly and Service Manual
Page 9 of 69
Electromagnetic flowmeter FLONET FN20xx.1
ELIS PLZEŇ a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, Phone: +420/377 517 711, Fax: +420/377 517 722
Es90420K/c
4. TECHNICAL PARAMETERS
4.1. Flow sensor
The sensor environment must be free of any strong magnetic fields.
4.1.1. Selection of correct sensor size
The following table shows minimum and maximum flow rates for various sensor sizes and flow velocities
ranging from 0.1 to 10 m/s (0.33 to 33 ft/s). The best operational properties will be achieved at the flow
velocity range of 0.5 to 5 m/s (1.64 to 16.4 ft/s). For lower flow velocities, the measurement accuracy is lower
while at higher flow velocities the turbulences at contact edges may cause undesirable interference.
Minimum and maximum flow rates for various sensor sizes
Q
1
corresponds to flow velocity 0.1 m/s (0.33 ft/s)
Q
4
corresponds to flow velocity 10.0 m/s (33 ft/s)
Basic parameters of the flow meters are designed according to standard EN ISO 4064-1 (OIML R 49).
The ratio of following flows is shown below:
Q
4
= 1.25
Q
2
= 1.6
Q
3
Q
1
Flow meter precision rating in accordance with standard EN ISO 4064-1 (OIML R 49)
The figures in the table are based on standard EN ISO 4064-1 (OIML R 49).
The flow rate values Q
1
, Q
2
, Q
3
and Q
4
related to individual design versions and meter dimensions are
shown below in the Table 1:
-6
-4
-2
0
2
4
6
Q1
Q2
Q3
Q4
Re
la
tiv
e
erro
r[
%
]
