Technical Parameters; Flow Sensor; Selection Of Correct Sensor Size - Elis FLONET FN20xx.1 Series Design, Assembly And Service Manual

ELIS PLZEŇ a. s.

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 corresponds to flow velocity 0.1 m/s (0.33 ft/s)
1
Q corresponds to flow velocity 10.0 m/s (33 ft/s)
4
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:
Flow meter precision rating in accordance with standard EN ISO 4064-1 (OIML R 49)
6
4
2
0
Q1
-2
-4
-6
The figures in the table are based on standard EN ISO 4064-1 (OIML R 49).
The flow rate values Q
1
shown below in the Table 1:
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
Q
4
= 1.25
Q
3
Q2
, Q , Q and Q related to individual design versions and meter dimensions are
2 3 4
Q
2
= 1.6
Q
1
Q3 Q4
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