Calibration of the pressure sensors may be required from time to time or when the UrSpring shows a sensor error (error code 109). Calibration adjusts the zero­ point of the pressure sensors to atmospheric pressure. During the calibration process, there may not be any pressure, flow or vibrations. The control unit adjusts the pressure sensors using the atmospheric pressure.
To perform a calibration:
1. Close the feed water valve.
2. Close the filtered water line downstream.
3. Flush the UrSpring manually as described in Flushing the filter module.
The UrSpring is now at atmospheric pressure.
4. Go to menu Change Settings? Calibrate Now?.
The display shows: Disconnect Water.
5. Push to confirm the water is disconnected.
The controller calibrates the sensors.
When finished the display shows: Adjustment or Sensors o.k.!

NOTICE When the controller display shows a sensor error, and you are sure that during the calibration there was no pressure, flow or vibration, then the pressure sensors must be exchanged see Exchanging the pressure sensors.