Red Lion LEGEND - Manual (Page 16)

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 Process
Count display value. A Count Scale Factor value of 1.0000 and a Scale
Multiplier of “1” results 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 and Total 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 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. For
details, refer to Scaling for Rate Indication in the Appendix.
TOTAL SCALE FACTOR
The number of pulses counted (internal total count value) is multiplied by the
Count Scale Factor, the Scale Multiplier, and the Total Scale Factor to obtain the
desired Total display value. A value of 1.0000 results in the same scaling as the
Process Count display. The Total Scale Factor value is used for converting the
number of pulses counted to the required units of measure for the Total display.
This includes conversion from different units of measure (i.e feet to meters, etc.).
The Total Scale Factor value can range from 0.0001 to 5.9999. For details, refer
to Scaling for Count and Total Indication in the Appendix.
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