PAW FC3.10 - Checking the VFS 2-40 Flow Sensor

25 Error correction
2022/07 99E13331xx-mub-en - V08 73
25.3 Checking the VFS 2-40 flow sensor
WARNING
Risk of death by electrocution!
 Disconnect the device from the power supply before opening the body.
 All work on the open device may only be carried out by professional
personnel.
Only for FriwaMini:
1. Remove the front panel.
2. Connect the voltmeter with the plug of the flow sensor at the controller (see illustration
on pin assignment).
3. Measure the tension of the flow sensor with a voltmeter and compare it to the following
table. Small deviations are acceptable.
4. After the completed measurement, mount the front panel.
Assignment tension - flow
Voltage
[V]
0.500 0.658 0.816 0.974 1.132 1.290 1.447 1.605 1.763 1.921
Flow
[l/min]
2 4 6 8 10 12 14 16 18 20
Voltage
[V]
2.079 2.237 2.395 2.553 2.711 2.869 3.026 3.184 3.342 3.500
Flow
[l/min]
22 24 26 28 30 32 34 36 38 40
Assignment voltage - temperature
Voltage [V] 0.5 0.8 1.1 1.4 1.7 2.0 2.3 2.6 2.9 3.2
Temperature
[°C]
0 10 20 30 40 50 60 70 80 90