Endress+Hauser Liquicap M FMI51 HART - Function: Medium Property; Operating Mode: Empty Calibr. and Function - Wet

Liquicap M FMI51 HART Commissioning
Endress+Hauser 47
Subfunction: "Cal. type"
In the "Dry" "Cal. type" empty and full calibration can be carried out without the probe being
in contact with the liquid. The calibration values can be entered directly in units of length.
In the "Wet" "Cal. Type", the probe must be covered by the liquid in the installed state for a
full calibration. This calibration can also be carried out if the tank is partially full. Both the
empty calibration and full calibration must be performed.
7.3.3 Function: "Medium property"
This function is only displayed if the function value "Dry" was selected under the
subfunction "Cal. type".
Subfunction: "Medium property"
The properties of the medium are entered here.
• "Nonconductive": the conductivity of the medium is ≤ 1 µS/cm - only with the ground
tube
• "Conductive": the conductivity of the medium is ≥ 100 µS/cm
• "Interface": the properties of the two media can be entered in the operating program of
ToF Tool. The associated calibration values are then calculated
• "Unknown": the medium properties are not known. The capacitance values of the "Empty
calibr." and "Full calibr." functions can be entered directly
Subfunction: "DC value"
This subfunction is only displayed if the function value "Nonconductive" was selected
under the subfunction "Medium property".
The dielectric constant for the liquid to be measured is entered here, go to the "Measuring
condition"→  15.
Subfunction: "Unit level"
This subfunction is only displayed if the function value "Conductive" or "Nonconductive"
was selected under "Medium property".
The desired level unit for Basic setup is entered here.
7.3.4 Operating mode: "Empty calibr." and function - "Wet"
The calibration data can be calculated with CapCalc.xls
With "Empty calibration", the 0% value or the 4 mA value is assigned to the level value.
The procedure applies to the "Wet" type of calibration. Information on "Dry" calibration
is provided below.
Subfunction: "Value empty"
The current level value is entered here, for example 5% partial filling → "Value empty" 5%
or 0% partial filling → "Value empty" 0%.
To keep the calibration error to a minimum, the level should be between 0% and 30%.
Subfunction: "Measure capacity"
The capacitance value currently measured is displayed here.