Measuring range
VA 550 English V1.21 Page 11 of 53
4.2 Measuring range flow VA 550
The flow-/consumption sensor VA 550 is available in 4 different versions:
• Low Speed max. measuring range of 50 m/s
• Standard max. measuring range of 92,7 m/s
• Max–Version max. measuring range of 185.0 m/s
• High speed–Version max. measuring range of 224 m/s
The sensors are programmed to pipe inner diameter of 53,1 mm.
Measuring range Analogue output Scaling
• Low Speed 0… 323,6 m³/h 4mA = 0 m³h, 20mA = 323,6 m³/h
• Standard 0 … 600 m³/h 4mA = 0 m³h, 20mA = 600 m³/h
• Max–Version 0 ... 1197,59 m³/h 4mA = 0 m³h, 20mA = 1197,59 m³/h
• Highspeed–Version 0 … 1450,06 m³/h 4mA = 0 m³h, 20mA = 1450,06 m³/h
In case of use in other inner pipe diameter the diameter, using the display version, the diameter has
to be set first.
The corresponding scale values for the respective version could be found in sections 4.2.1 to 4.2.4.
Example:
Pipe 1“, Inner diameter 25mm
Measuring range Analogue output Scaling
• Low Speed 0 … 65,9 m³/h 4mA = 0 m³h, 20mA = 65,9 m³/h
• Grundversion( Standard) 0 … 122,2 m³/h 4mA = 0 m³h, 20mA = 122,2 m³/h
• Max–Version 0 ... 243,88 m³/h 4mA = 0 m³h, 20mA = 243,88 m³/h
• Highspeed–Version 0 … 295,30 m³/h 4mA = 0 m³h, 20mA = 295,30 m³/h
For changing the inner pipe diameter and adjusting the 4…20mA scaling, please refer to chapter
“Operation”.
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