Measuring ranges
VA 500 Bi-directional English 1.24 Seite 13 von 56
8 Measuring ranges
The consumption sensor VA500 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 Analogoue 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 5.1 to 5.3.
Example:
Pipe 1“, Inner diameter 25mm
Measuring range Analogoue 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”.
Please note:
The consumption sensor VA 500 Bi directional corresponds with the latest state of technology and can
generally be used for burnable and non-burnable gases.
If this consumption sensor is used for measurement of burnable gases (e.g. natural gas) we explicitly
point out that the sensor has no DVGW admission, however, it can be used for
burnable gases. A DVGW admission is not mandatory.
For the use in e.g. natural gas, the sensor will be calibrated in natural gas. The calibration protocol
(inspection certificate) is included in the scope of delivery.
The area outside the pipe (environment of the sensor) is not allowed to be an explosive area. (Ex area) .
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