COMMISSIONING
Part No.: 4417340 Revision 1 Service Manual 235
954 SmartServo FlexLine
Interface measurement
Interface 3 is used as product / water interface measurement (with
interface 2 another interface can be measured). The set point must be
set to such a value that half of the displacer volume is immersed in the
water and the other half of the displacer volume is immersed in the
product. That can be calculated as follows (refer to Figure 7-41 and to
Appendix B for detailed displacer information):
()
()
[]
11
22
Setpoint3 0.001* [Displacer weight] - [Displacer volume] + kg
product water
ρρ
=
where:
[Setpoint3]: set point interface 3 measurement [kg]
[Displacer weight]: displacer weight [g]
[Displacer volume]: displacer volume [cm
3
]
ρ
product
: density of the product [g/cm
3
]
ρ
water
: density of water [g/cm
3
]
Figure 7-41 Calculation of set point
Example:
Displacer #0815.343: ø45 mm
Displacer weight: 223 g
Displacer volume: 105 cm
3
Volume lower conical part: 3.2 cm
3
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