Endress+Hauser Deltabar FMD72, Руководство по эксплуатации

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Commissioning Deltabar FMD72
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11.7.7 Calibration with partially-filled tank (wet calibration)
Example:
This example explains a wet calibration for cases in which it is not possible to empty the tank and
then fill it to 100%. During this wet calibration, a level of 20% is used as the calibration point for
"Empty" and a level of "80%" is used as the calibration point for "Full". The calibration is then
extended to 0% to 100% and lower range-value (LRV)/upper range-value (URV) are adapted
accordingly.
Prerequisite:
• The default value in level mode for the calibration mode is "Wet".
• This value can be adjusted: Menu path: Setup
®
Extended Setup
®
Level
®
Calibration Mode
Description
1 Select the "Level" measuring mode via the
"Measuring mode (005)" parameter.
Menu path: Setup
®
Measuring mode
20 %
1
80 %
2
20 %
80 %
A0017668
1 See table, step 3
2 See table, step 4
2 Select a unit via the "Unit before lin. (025)"
parameter, here "%" for example.
Menu path: Setup
®
Extended Setup
®
Level
®
Unit Before Lin.
3 20% of the container is full. Enter the level value for
the lower calibration value via the "Empty Calib.
(028)" parameter, here 20% for example.
Menu path: Setup
® Extended Setup ® Level ®
Empty Calibration
4 80% of the container is full. Enter the level value for
the upper calibration value via the "Full Calib. (031)"
parameter, here 80% for example.
Menu path: Setup
®
Extended Setup
®
Level
®
Full Calibration
5 The pressure values for full/empty calibration are
automatically recorded and applied. The upper range
value (URV) and lower range value (LRV)
automatically accept the values that were entered in
"Empty Calib. (028)" and "Full Calib. (031)". These
automatically entered values can be edited if
necessary and, for example, changed to a value
ranging from 0 to 100%.
If the process uses a medium other than that on which the calibration was based, the
new density must be specified in the "Process Density (035)" parameter. In this case,
you have to enter the various densities via the following menu path:
• Setup
®
Advanced Setup
®
Level
®
Adjust Density (034) (e.g. 1.0 kg/l for water)
• Setup ®
Advanced Setup
®
Level
®
Process Density (035) (e.g. 0.8 kg/l for oil)