Vega VEGATOR 142 Operating Instructions Manual

Vega VEGATOR 142 Operating Instructions Manual Manual pdf 19 page image

196 SetupVEGATOR 142 •46839-EN-1906266.5 Switching point adjustment, two-point controlwith 4 … 20 mA sensor (continuous)The two-point control is used for example when filling and emptyingis carried out via a pump. The filling of a vessel can be for exampleswitched on at 10 % and switched off again at 90 %. The output of thesecond channel behaves identically like the first channel provided thesame mode is set. By changing the mode, the function of the relayscan be inverted.With a continuously measuring 4 … 20 mA sensor, the two switchingpoints can be set to any position between 0 … 100 %. Take note ofthe operating instructions when using a capacitive sensor, particularlythe sensitivity setting.Fig. 8: Application examples with 4 … 20 mA sensor (pressure transmitter orcapacitive rod probe)Depending on the mode you now adjust the switching points asdescribed in the following.1. Make sure that switches 1 and 7 on the DIL switch block are setto "max." and switch 6 to "Two-point control". The switches forthe switch-on and switch-off delay should be set to "0 s".2. The vessel should be empty i.e. only filled until right below therequested lower switching point3. Set both potentiometers to the left end position, the two yellowLED displays do not light4. Fill the vessel up to the requested lower switching point5. Set the potentiometer "CH1" to the right end position, turn thepotentiometer "CH2" slowly clockwise until the two yellow LEDdisplays light6. Fill the vessel up to the requested upper switching point7. Turn the potentiometer "CH1" slowly anticlockwise until the twoyellow LED displays extinguish, the controller is now ready foroperation1. Make sure that switches 1 and 7 on the DIL switch block are setto "min." and switch 6 to "Two-point control". The switches forthe switch-on and switch-off delay should be set to "0 s".2. The vessel should be empty i.e. only filled until right below therequested lower switching pointOverflow protection (max.operation)Dry run protection (min.operation)