When you want to display the measured variable (V0H0) converted into the selected level
unit, enter converted values for the minimum and maximum level values. The "Display at
4 mA" (V3H1) parameter corresponds to the minimum level value and the "Display at
20 mA" (V3H2) parameter to the maximum level value.
#
Matrix Path through the
menus
Entry
1
Example:
– Lower and upper range-values are set:
"Set 4 mA Value" (V0H1) = 0 mbar
"Set 20 mA Value" (V0H2) = 1500 mbar
2
The current measured value (V0H0) displays
in the pressure mode (V0H0) = 750 mbar.
Main group: Linearisation
3
Select operation mode e.g. "Level linear"
V3H0
➤
Level
linear
Confirm
4
The minimum level, maximum level and
current measured variable are displayed as
follows:
– "Display at 4 mA" (V3H1) = 0 %
– "Dispaly at 20 mA" (V3H2) = 100 %
– "Measured Value" (V0H0) = 50 %
5
Select unit for level, volume or weight
V3H3
➤
Unit after
Linearisation
e.g. m
Confirm
#
Matrix Path through the
menus
Entry
6
Enter the converted minimum level value
V3H1
➤
Display at
4 mA
e.g. 0 (m)
Confirm
7
Enter the converted maximum level value
V3H2
➤
Display at
20 mA
e.g. 15 (m)
Confirm
Results
•
The parameters for the minimum and
maximum level value indicate:
– "Display at 4 mA" (V3H1) = 0 m
– "Display at 20 mA" (V3H2) = 15 m
•
The current measured value (V0H0)
indicates:
– "Measured value" (V0H0) = 7.5 m
Density correction
If the calibration has been made with water or the product changes at a later date, the
calibration values can be corrected by entering a density factor.
Determining the
density factor
Example: A tank is filled with water and calibrated. The density of the water (old density)
is 1 g/cm
3
. Later the tank will be used as a storage tank and be filled with the actual
medium to be measured. The new density is 1.2 g/cm
3
. V3H4 still contains the factory
setting 1, i.e. the current factor is 1.
#
Matrix Path through the
menus
Text
Main group: Linearisation
1
Entry of a density factor, e.g. after the product
changes
V3H4
➤
Density factor
e.g. 1.2
Confirm
Result
•
The measured value in V0H0 is divided
by the density factor and is thus correct
for the new product.
Note!
The density factor affects the level measurement. When changing the product density,
please note that an existing linearisation curve can only be used with the new densitiy
factor.
density factor = current factor
new density
old density
•
density factor
1
1 2 g / c m
1g / c m
1 2
3
3
= •
=
.
.
BA174Y50
Measurement with
product
ρ
= 1.2
Calibration with
water
ρ
= 1.0
Note!
Deltabar S
6 Level Measurement
Hauser
39
