Level measurement
Cerabar S/Deltabar S/Deltapilot S 4...20mA HART
36
Hauser
!
Note!
1.
For this level type, the measured variables " %", " Volume", " Mass",
"%- %", "%- Volume" and "%- Mass" are available.
See Page 79 ff.
2.
You can also specify customer-specific units. See parameter description for PRESS. ENG. UNIT
(
Page 83), UNIT VOLUME (
Page 84) and MASS UNIT
(
Page 85).
3.
Once you have selected the "Pressure Linearized" level type, the warning message "W710 Set
span too small. Not allowed." can appear. At this stage the linearisation table already consists
of two points as standard. It could be the case that the 2nd value, and thus the highest X-VAL.
of the linearisation table, is smaller than the minimum span permitted (
MINIMUM SPAN,
Page 119). The message goes out as soon as the highest X-VAL. is larger than the minimum
span.
4.
A level value is assigned to both the lower and upper current value with the SET LRV
(
Page 98) and SET URV (
You can use the ASSIGN CURRENT parameter (
Page 113) to specify whether the current
output should depict the 1st or 2nd measured variable. Depending on the setting of the
ASSIGN CURRENT parameter, enter the following values for SET LRV and SET URV:
– ASSIGN CURRENT = tank content (factory setting)
%-value, volume value or
mass value
– ASSIGNMENT = height
level value
The following applies for the setting ASSIGN CURRENT "Tank content":
If you enter values for TANK CONTENT MIN (
Page 101 or 104) and TANK CONTENT
MAX (
Page 101 or 105), the SET LRV and SET URV parameters are also changed. If you
want to assign values other than those for TANK CONTENT MIN and TANK CONTENT MAX
to the lower and upper current values, the desired values must be entered for SET LRV and
SET URV.
The following applies for the setting ASSIGN CURRENT "Height":
If you enter values for LEVEL MIN (
Page 86) and LEVEL MAX (
and SET URV parameters are also changed. If you want to assign values other than those for
LEVEL MIN and LEVEL MAX to the lower and upper current values, the desired values must
be entered for SET LRV and SET URV.
5.
You can use the MENU DESCRIPTOR parameter (
Page 110) to specify which measured
value should be displayed on the on-site display.