Appendix
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Instruction manual VITO
Page 45
Situation 2 (probe fully covered with product)
Read the measured capacitance by item
MX
.
Enter this value into item
VR
.
Situation 3 (probe partly covered by water and partly covered by product)
Check the water level by means of a manual measurement.
An interpolation is applied on the measured capacitance to find the capacitance value at zero water level.
Refer to figure: manual measurement of water level.
The interpolation of the capacitance value is done as follows:
Round off the % water value to 0.1%.
To calculate the value for item
VR
(minimum capacitance), the actual
measured capacitance (item
MX
) and the maximum capacitance (item
VT
)
should be known. These two values can be read by the PET or via the
service program from the instrument.
The minimum capacitance value is then calculated as follows:
For example:
Water level (measured by manual dip)
= 0.122 m (or 4.80 inch or 0.400 ft)
WB
= 0.025 m (or 0.98 inch or 0.082 ft)
MX
= 185.224 pF
VT
= 430.4 pF (obtained from “CheckList
765/766/768 Final Assembly”)
Manual measurement of water level
Step 1:
% water (rounded off to 0.1%):
Summary of Contents for Enraf VITO
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