LINK Systems System 1100 Tonnage Monitor - Manual (Page 89)

UNBALANCED LOADS AND SCALE FACTOR
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8-3
ORIGINAL MACHINE RATING
N1 N1
C' = ------------------------- * C
NEW MACHINE RATING
ORIGINAL MACHINE RATING
N2 N2
C' = ------------------------- * C
NEW MACHINE RATING
ORIGINAL MACHINE RATING
N3 N3
C' = ------------------------- * C
NEW MACHINE RATING
and
ORIGINAL MACHINE RATING
N4 N4
C' = ------------------------- * C
NEW MACHINE RATING
N1 N2 N3 N4
where C' , C' , C' , C' , are the new calibration numbers to which
N1 N2
channels 1 through 4 should be adjusted, respectively. C , C ,
N3 N4
C , C , are the original calibration numbers for channels 1 through
4, which were determined by the procedures followed in the Section
6 of this manual.
The following examples illustrate how the System 1100 Tonnage
Monitors on the machines of Examples 1 and 2 of this section can be
set up to permit more tonnage on each channel while retaining
calibration.
Example 3. Following the instructions in the Section 6 of this
manual for the two channel System 1100 unit on the machine of
Example 1 resulted in a machine rating number of 100.0 tons being
programmed into the unit. The calibration numbers were found to be
144 for channel 1 and 148 for channel 2. It is desired to shift
the machine rating alarms on each channel from 62.5 tons (125% of
50 tons for each side) to 70 tons for each channel. To do this,
calculate the new machine rating number (scale factor). The
required number is:
70 tons
MACHINE RATING NUMBER = --------- = 112 tons