BERTHOLD TECHNOLOGIES LB 444 - Multiplication Factor

04/03 347 LB 444
70
8.5.2 Multiplication Factor
Each measured value is multiplied by the value stored as Factor. This allows you to chan-
ge the gradient of the calibration curve.
Example:
Measuring range 1.1 - 1.3 g/cm
3
If you enter 1.1 at Factor, 1.21 g/cm
3
will be displayed instead of 1.1 g/cm
3
. Instead of
1.3 g/cm
3
the value 1.43 g/cm
3
is now displayed. Thus even the low point of the measur-
ing range is increased, provided it is not at 0.
Remedy:
This can be corrected by entering the appropriate data under Offset and Factor.
Example:
For 1.1 g/cm
3
the indicated value is correct; instead of 1.2 g/cm
3
the reading should
show 1.25 g/cm
3
.
Input value for Factor:
33
33
actualactual
nominalnominal
g/cm 1.1 - g/cm 1.2
g/cm 1.1 - g/cm 1.25
=
L - H
L - H
= F
= 1.5
Input value for Offset:
K = L
nominal
- L
actual
F = 1.1 g/cm
3
- 1.1 g/cm
3
· 1.5 g/cm
3
= -0.55
H = upper value of the measuring range in g/cm
3
L = 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
= 1.12 g/cm
3
L
nominal
= 1.15 g/cm
3
H
actual
= 1.25 g/cm
3
H
nominal
= 1.3 g/cm
3
F
gcm gcm
gcm gcm
=
−
−
13 115
125 112
33
33
./ . /
./ ./
K = 1.15 g/cm
3
- 1.12 g/cm
3
· 1.1538 = - 0.1423