Endress+Hauser Waterpilot FMX21 - Page 46

Commissioning Waterpilot FMX21
46 Endress+Hauser
Description
14 If density correction is required, assign the
temperature probe in the "Auto dens. corr."
parameter. A density correction is only possible
for water. A temperature-density curve that is
saved in the device is used. For this reason, the
"Adjust density" (step 10) and "Process density"
(step 13) parameters are not used here.
Menu path: Expert → Application → Level →
Auto dens. corr.
15 Result:
The measuring range is configured for
0 to 1 000 l (0 to 264 gal).
For this level mode, the measured variables %, level, volume and mass are available,
see "Unit before lin." .
9.10.4 "In pressure" level selection Calibration with reference
pressure (wet calibration)
Example:
In this example, the level in a tank should be measured in "m". The maximum level is
3 m (9.8 ft).
The pressure range is derived from the level and the density of the medium. In this
situation, the device sets the pressure range to 0 to +300 mbar (0 to 4.5 psi).
Prerequisite:
• The measured variable is in direct proportion to the pressure.
• The tank can be filled and emptied.
The values entered for "Empty calib./Full calib." and" Set LRV/Set URV" and the
pressures present must be at least 1% apart. The value will be rejected, and a warning
message displayed, if the values are too close together. Other limit values are not
checked, i.e. the values entered must be appropriate for the sensor and the measuring
task for the device to be able to measure correctly.
Description
1 Perform a "position adjustment" →  40.
0 mbar
300 mbar
3 m
0 m
A0018824
1 See table, step 9.
2 See table, step 10.
2 Select the "Level" measuring mode via the
"Measuring mode" parameter.
Menu path: Setup → Measuring mode
L
WARNING
Changing the measuring mode affects the
span (URV)
This situation can result in product overflow.
‣
If the measuring mode is changed, the
setting for the span (URV) must be
checked in the "Setup" operating menu and
readjusted if necessary.
3 Select a pressure unit via the "Press. eng. unit"
parameter, here "mbar" for example.
Menu path: Setup → Press. eng. unit
4 Select the "In pressure" level mode via the "Level
selection" parameter.
Menu path: Setup → Extended setup → Level →
Level selection.