Honeywell Enraf VITO, Инструкция по эксплуатации

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Water bottom measurement
___________________________________________________________________________
Instruction manual VITO Page 38
The offset (water probe bottom position) item WB then becomes:
WB
= (‘
A
’ + product level) - (nozzle height – ‘
B
’) = 0.016 m (or 0.62 inch or 0.052 ft)
Note:
If WB is a negative figure then it is possible to have a negative water level reading.
Water probe length :
The 765 VITO water probe and 766 / 768 VITO combi probe can have different water probe lengths. The actual
water probe length can be found from the Model selection code of the probe. This length must be entered in item
WP (water probe length). Table 5 – 1 gives an overview:
Position 2 Model
selection code
(765/766/768)
Item
WP
( LD =M)
[metres]
Item
WP
( LD =F)
[feet]
Item
WP
( LD =I)
[inch]
Item
WP
( LD =P)
[fractions]
A +000.4850 +0001.591 +00019.09 +01’07”02
B +000.9850 +0003.232 +00038.78 +03’02”12
C +001.9850 +0006.512 +00078.15 +06’06”02
Table 5 – 1
Minimum and Maximum capacitance :
Factory calibration values for the maximum capacity and minimum capacity are listed on the “CheckList
765/766/768 Final Assembly”, delivered with every VITO probe.
The value at VR is the minimum capacity (capacitance measured in air). This is an approximate value and
depends on the dielectric property of the stored product. This value needs to be adjusted.
The value at VT is the maximum capacity (capacitance measured in water) and needs no adjustement.
Calibrating the water probe :
Refer to Appendix B for information about calibrating the water probe. Where the water dip is mentioned, please
refer to the measured water level at the probe position as described before.