Linear dependencyFor tanks with a linear dependency between level and volume or weight, technical units
can be set by entering the maximum volume or weight in V2H5 and V0H6.
# VH Entry Significance
➤ Linearisation
1 V2H0 5
H
Linear
2 V2H5 e.g. 500 kg
VH
Max. volume
Volumen/weight at
level F
➤ Basic calibration
3 V0H6 e.g. 500 kg
VH
Value for 20 mA
Volumen/weight at
level F
Result
•
Lower range-value E = e.g. 0 kg (4 mA)
•
Upper range-value F = e.g. 500 kg
(20 mA)
Linearisation tableIf volume or weight is not proportional to level within the set measuring range, then a
linearisation table must be entered before the measured value can be displayed in
technical units. The prerequisites are as follows:
•
The max. 30 value pairs for the linearisation curve are known
•
The level values must be entered in increasing order. The curve constantly
increases (monotonic).
•
The levels for the first and last points correspond to those of the empty and full
calibration (E and F)
•
The level points are entered in the units of calibration.
# VH Entry Significance
1 If no calibration yet see Section 6.1/6.2
➤ Linearisation
2 V2H0 4
H
Delete existing
curve
3 V2H0 2
H
Linearisation mode
"manual"
4 V2H1 e.g. 1
H
1st value pair
5 V2H2 e.g. 0 m/ft
H
Level point 1
6 V2H3 e.g. 0 kg
H
Volume/weight
point 1
7 Repeat steps 4...6 for up to 30 value pairs
8 V2H0 1
H
Activate
linearisation
➤Basic calibration
9 V0H6 e.g. 600 kg
VH
Value for 20 mA
Volumen/weight at
level F
10 V0H0
V0H9
Measured value in
technical units
Level in m/ft
F
E
BA171Y38
100%
0
V2H5
V0H6
level
technical
units
F
E
BA171Y41
F m/ft
0
Vmax
V0H6
level m/ft
technical
units
Micropilot FMR 231 Chapter 6 Calibration with Display/Remote Operation
Endress+Hauser 29
To Next Page
Loading...
