Safety Instructions
VA 500 English V1.16
Seite 7 von 52
Please read carefully before starting the device!
The consumption sensor VA 500 measures the flow velocity (calorimetric principle) in the
center of the pipe. Please observe mounting instruction and inlet section = 15 x inner
diameter and outlet section = 5 x inner diameter.
The final values of the measuring ranges are as follows:
VA 500 standard version 92.7 m/s, please take the flow rates from the tables on pages 14-15
VA 500 max. version 185 m/s, please take the flow rates from the tables on pages 16-17
VA 500 high speed version 224 m/s, please take the flow rates from the tables on pages 18-19
1. VA 500 with Display
with 4… 20 mA analogue- and pulse output
Please enter inner diameter of the pipe!
Values indicated in the display:
Actual value in m³/h, m³/min etc.
Counter in m³, l, cf
as well as pulse output, 1 pulse per m³, l, cf
are calculated according to the set diameter. Please take the analogue value for flow rate
4. 20 mA from the tables on pages 14 to 19
4 mA always corresponds with the starting value 0 m³/h, 0 m³/min. The final value 20 mA can be taken
from the tables on pages 14 to 19.
Example VA 500 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h
2. VA 500 without Display with
4… 20 mA analogue- and pulse output
No adjustments are necessary at the consumption sensor.
The respective final values for the flow rate can be taken from the tables on the pages 14 to 19.
Analogue start value 4 mA is always set as scaling value 0 m³/h, 0 m³/min etc.
Analogue end value 20 mA is the final value, see tables pages 14 -19.
Example VA 500 Standard:
1" with inner diameter 25.0 mm, 4 mA = 0 m³/h and 20 mA = 122.2 m³/h
2" with inner diameter 53.1 mm, 4 mA = 0 m³/h und 20 mA = 600.0 m³/h
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