4x50 EtherNetIP.190129.1v4: User manual
WWW.EILERSEN.COM
Version: 2020-11-24, rev.: 1v4
Page: 18
4.1.2 Corner calibration of weighing system
In systems where the load is not always placed symmetrically the same place
(for example a platform weight where the load can be placed randomly on the
platform when a weighing is to take place), a fine calibration of a systems cor-
ners can be made, so that the weight indicates the same independent of the
position of the load. This is done as follows:
1)
Check that the weighing arrangement is empty. Zero the weighing sys-
tem.
2)
Place a known load (
CalLoad
) directly above the load cell that is to be
corner calibrated.
3)
Calculate the corner calibration factor that should be multiplied on the
uncalibrated gross weight of the load cell in order to achieve correct
showing as:
CornerCalFactor[x] = (CalLoad)/(LcGross[x])
After this the determined corner calibration factor is used to calculate
the calibrated gross weight of the load cell as follows:
LcGrossCal[x] = CornerCalFactor[x] * LcGross[x]
4.1.3 Calculation of uncalibrated system weight
Based on the load cell gross values (
LcGross[x]
or
LcGrossCal[x]
), whether
they are corner calibrated or not, an uncalibrated system weight can be calcu-
lated as either:
Gross =
LcGross[X1] + LcGross[X2] + …
or:
Gross = LcGr
ossCal[X1] + LcGrossCal[X2] + …