118_4416655_Rev06
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Water bottom measurement<br />
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5 Water bottom measurement<br />
5.1 Introduction water bottom measurement<br />
The water bottom probe is based on a capacitive measurement principle. The probe is one plate of the capacitor<br />
and earthed, electrically conducting parts as water and the tank shell, is the other plate. A change in water level is<br />
detected by the water bottom probe as a change in capacitance.<br />
5.1.1 Water probe versions<br />
There are three different water probe versions which can be interfaced:<br />
• The 765 VITO water probe;<br />
• The 766 VITO combi probe;<br />
• The 768 VITO combi probe<br />
The 765 VITO water probe, the 766 VITO combi probe and the 768 VITO combi probe are connected to the 762<br />
VITO Interface, which is connected to the HCU board or ICU-HPI board in the level gauge or indicator.<br />
Figure 5.1 VITO water probes<br />
Instruction manual VITO Page 35
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