Red Lion LEGEND - Manual (Page 13)

PROGRAM SCALE FACTORS MODULE
The Scale Factors are accessed from the Scale Factors Module in the main
display loop or from the Scaling Module in the programming loop.
Since the Scale Factors may need to be changed periodically, this module
allows the operator to change a scale factor value WITHOUT entering the
programming loop. The following flowchart shows only the Scale Factor
portion:
COUNT SCALE FACTOR
The number of pulses counted (internal count value) is multiplied by the
count scale factor value and the Scale Multiplier to obtain the desired count
display value. A Count Scale Factor Value of 1.0000 and a Scale Multiplier of
“1” will result in the display of the actual number of input pulses that were
counted. The Count Scale Factor value is used for converting the number of
pulses counted to the required units of measure for the display. This includes
conversion from different units of measure (i.e feet to meters, etc.).
The Count Scale Factor Value can range from 0.0001 to 5.9999. It is
important to note that the precision of a counter application cannot be
improved by using a Scale Factor greater than “1”. To accomplish greater
precision, more pulse information must be generated per measuring unit. For
details, refer to Scaling for Count Indication in the Appendix.
RATE SCALE FACTOR
The internal rate value (pulses per second) is multiplied by the Rate Scale
Factor, Rate Scale Multiplier, and Rate Conversion Factor values to obtain
the desired rate display value. The Rate Scale Factor value is used for
converting the internal rate (in pulses per second) to the required units of
measure for the display. This includes conversion from different units of
measure (i.e feet to meters, etc.).
The Rate Scale Factor Values range from 0.0001 to 5.9999. Due to the way the
rate is calculated, high resolution and accuracy are achieved at all input rates,
slow or fast. For details, refer to Scaling for Rate Indication in the Appendix.
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