LINK Systems System 1100 Tonnage Monitor - Manual (Page 88)

UNBALANCED LOADS AND SCALE FACTOR
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8-2
may prevent the machine from operating with acceptable non-central
loads. This can be rectified by a simple procedure involving
changing both the machine rating number (scale factor) and the
channel calibration numbers.
After a System 1100 is calibrated using the standard procedures in
the Section 6 of this manual, the allowable tonnage per channel,
as set by machine rating alarms can be increased while maintaining
calibrated tonnage readings by the following procedures.
For a two channel System 1100, the machine rating number which
should be programmed to shift the machine rating alarms to a
desired tonnage is determined by dividing the desired allowable
tonnage per channel by 0.625. To keep the System 1100 correctly
calibrated, it is then necessary to change each calibration number
for both channels of the two channel unit to the new calibration
numbers.
ORIGINAL MACHINE RATING
N1 N1
C' = ------------------------- * C
NEW MACHINE RATING
and,
ORIGINAL MACHINE RATING
N2 N2
C' = ------------------------- * C
NEW MACHINE RATING
where,
N1
C' = New calibration number for channel 1
N1
C = Original calibration number for channel 1
N2
C' = New calibration number for channel 2
N2
C = Original calibration number for channel 2
For a four channel System 1100, the machine rating number which
should be programmed to shift the machine rating alarms to a
desired tonnage is determined by dividing the desired allowable
tonnage per channel by 0.3125. To keep the System 1100 correctly
calibrated after changing the machine rating number, it is
necessary to change each calibration number for each channel of the
four channel unit to the new calibration numbers,