Endress+Hauser Waterpilot FMX21, Operating Instructions Manual

Page: 53 / 144

Waterpilot FMX21 Commissioning
Hauser 53
11. Enter the volume value for the upper calibration point via the "Full calib." parameter,
here 1 000 l (264 gal) for example.
 Menu path: Setup → Extended setup → Level → Full calib.
12. Enter the height value for the upper calibration point via the "Full height" parameter,
here 4 m (13 ft) for example.
 Menu path: Setup → Extended setup → Level → Full height
13. Enter the density of the medium via the "Adjust density" parameter, here "1 g/cm³" (1
SGU) for example.
 Menu path: Setup → Extended setup → Level → Adjust density
14. Set the volume value for the lower current value (4 mA) via the "Set LRV" parameter
(0 l).
 Menu path: Setup → Extended setup → Current output → Set LRV
15. Set the volume value for the upper current value (20 mA) via the "Set URV" parameter
(1 000 l (264 gal)).
 Menu path: Setup → Extended setup → Current output → Set URV
16. 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" parameter.
 Menu path: Setup → Extended setup → Level → Process density
The process density can only be changed if automatic density correction is switched
off (see Step 4).
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 "Output unit" →  96.
9.9.6 "In height" level selection Calibration with reference pressure
(wet calibration)
Example:
In this example, the volume in a tank should be measured in liters. The maximum volume
of 1 000 l (264 gal) corresponds to a level of 4 m (13 ft).
The minimum volume of 0 liters corresponds to a level of 0 m since the process membrane
of the probe is at the start of the level measuring range. The density of the medium is 1
g/cm 3 (1 SGU).
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 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.