HAKO Scrubmaster B175 R, Manual

Page: 16 / 124

2.2.2 Solution tank display
2.2 Brief description
Sheet 16
The machine has a fill level indicator for the fresh water tank in the MFD which
displays the current fill level in steps of 20%.
The fill level is measured via a differential pressure sensor. The pressure sensor is
connected to an immersion tube via a hose which is located next to the water filling
opening of the fresh water tank. The immersion tube extends to just above the bottom
of the fresh water tank. A certain pressure is present at the pressure sensor via the
immersion tube and the hoses, which is converted into an electrical signal by the
electronics of the pressure sensor. This signal is evaluated by the machine control unit
and shown on the display as a fill level signal.
The sensor is supplied with a voltage of 5V via A01:X14.5. The minus connection
comes from A01:X15.15,and the analogue signal of the pressure sensor is present at
A01:X15.3.
In case a water column is present in the immersion tube, the water filling indication is
misaligned. The recalibration of the filling indication display is done by the following
procedure: empty the fresh water tank complete. This will also empty the immersion
tube in the fresh water tank and recalibrate the filling indication.