Endress+Hauser NRF81 - Page 189

Tankside Monitor NRF81 Operating menu
Endress+Hauser 189
Linear approximation of the HyTD correction
The real amount of deformation varies non-linearly with the level due to the construction
of the tank. However, as the correction values are typically small compared to the
measured level, a simple straight line method can be used with good results.
H
2
1
L
L
0
3
A0028724
 51 Calculation of the HyTD correction
1 Linear correction according to "Deformation factor (→  191)"
2 Real correction
3 Starting level (→  190)
L Measured level
H HyTD correction value (→  190)
Calculation of the HyTD correction
L < L
0
C = 0
HyTD
=
= C = - (L - L ) x D
HyTD 0
L > L
0
A0028715
L Measured level
L
0
Starting level
c
HyTD
HyTD correction value
D Deformation factor