Berthold LB 444 K-40 - Automatic Measuring Time Switchover

01/10 347 LB 444 K-40
33
2.1
2%102%20
2%102%22
minmin
=
−
−
=
−
−
=
OKOK
OKOK
LH
LH
F
actualactual
alnoalno
Input value for Offset:
22.1*1010*
min
−
=
−
=
−
= FLLK
actualalno
H = upper value of the measuring range in g/cm
3
H = lower value of the measuring range in g/cm
3
The same is true if upper and lower point of the measuring range are to be changed by
different values.
Example:
L
actual
= 11% K20
L
nominal
= 12% K20
H
actual
= 26% K20
H
nominal
= 28% K20
0666.1
1126
1228
=
−
−
=F
K = 12 – 11*1.0666 = 0.2674
7.5 Automatic Measuring Time Switchover
To quickly update the measured value if sudden concentration changes occur, you can
enable automatic measuring time switchover (Rapid switchover on the menu Parameter,
see chapter 6.36.4).
The smallest value that can be entered is 8 s.
If a sudden concentration change occurs which exceeds the entered threshold (Sigma),
the entered time constant is reduced to 1/10 of the original value, but not less than 0.8
s. Thus, the output signal adjusts much quicker to the new concentration value. The
changed time response of the output signal is illustrated in Figure 13.