6 Level Measurement
This chapter describes the parameters which must be enterd to commision a Cerabar S
for level measurement. This chapter contains the following information:
• Calibration via tool
• Empty/ Full calibration
• Dry calibration
• Damping
• Locking/unlocking of the manufacturer's-specific parameters
• Analog input block parameter
• Measuring point information
Note!
Additional functions that are required for level measurement, e.g. linearization can be
accessed only via a Foundation Fieldbus tool.
6.1 Calibration via a configuration tool
The calibration is made via a configuration tool (remote operation).
Parameter Significance
Lower Range
Value
Entry of pressure for lower range-value – zero
(bargraph and pressure for "empty")
Upper Range
Value
Entry of pressure for upper range-value – span, max. turndown 20:1
(bargraph and pressure for "full")
Set Lower Range
Value
Acting pressure is taken as lower range-value – zero
(bargraph and pressure for "empty")
Set Upper Range
Value
Acting pressure is taken as upper range-value – span, max. turndown 20:1
(bargraph and pressure for "full")
Set Bias Pressure
Entry of bias pressure (affects display module and parameter "Biased Pressure" only)
Bias Pres Autom
Acting pressure is taken as bias pressure (affects display module and parameter
"Biased Pressure" only)
Set Output Damp.
Entry of damping τ (0...40 s)
Select Press Unit
Options pressure unit: mbar, bar, Pa, hPa, kPa, MPa, mm H
2
O, m H
2
O, in H
2
O,
ft H
2
O, psi, g / cm
2
, kg / cm
2
, kgf / cm
2
, atm, lb / ft
2
, torr, mm Hg or in Hg.
Linearization
Operating mode: "level linear" (level, volume and weight) or "level horizontal cylinder"
(volume and weight)
Start Point
Zero for output scaling (corresponds to lower range-value)
Full Scale
Scale value for output scaling (corresponds to upper range-value)
Unit After
Linearization
Selecting units for mesuring the level, volume or weight – the options depend on the
operating mode selected. The linearized value is shown in these units. The
measured value is not converted into the new units.
Density Factor
Density factor – Applications with media with a density not equal to 1 g/cm³.
Note!
Cerabar S FF 6 Level Measurement
Endress+Hauser 39
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