Rice Lake REVOLUTION 682 Synergy Plus, Technical Manual

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Appendix
© Rice Lake Weighing Systems ● All Rights Reserved 115
16.7.2 Adaptive Filter (Adaptive Only)
The adaptive filter has two settings, Adaptive Filter Sensitivity and Adaptive Filter Threshold . It maintains a running average of
the A/D readings when the weight change remains less than the defined threshold value. The filter automatically applies less
value to each successive A/D reading the longer the weight change is less than the threshold value. The amount of value given
to the most recent A/D reading is determined by the sensitivity setting.
Adaptive Filter Sensitivity
Adaptive Filter Sensitivity can be set to Heavy , Medium or Light . A Heavy setting results in an output which is more stable to
weight changes than the Light setting. A Heavy setting also results in small changes in weight data (a few grads) on the scale
base to not be seen as quickly as with the Light setting.
If the difference in typical subsequent weight values on the scale are only a few display divisions, use a Light setting. On a truck
scale where the changes in subsequent weight values are 100s of display divisions, a Heavy setting is more appropriate.
Adaptive Filter Threshold
Set the Adaptive Filtering Threshold for the amount of observed instability in the system. This parameter can be set in the range
of 0–2000 and is entered as a weight value. When a new sampled weight value is acquired, the adaptive filter compares the
new value to the previous (filtered) output value.
If the difference between the new value and the previous output value is greater than the
Adaptive Filtering Threshold
parameter the adaptive filter is reset to the new weight value.
If the difference between the new value and the previous output value is less than the
Adaptive Filtering Threshold parameter,
the two values are averaged together using a weighted average. The weighted average is based on the amount of time the
system has been stable, and selected Adaptive Filter Sensitivity sensitivity.
With the Adaptive Filtering Threshold set at zero, determine the amount of instability present. Enter this amount of weight
instability to set the threshold of the adaptive filter. The adaptive filter is set to OFF , the Adaptive Filtering Threshold parameter
is set to zero.
16.7.3 Damping Filter (Damping Only)
The damping filter is a simple filter which adjusts the amount of time it takes for a change in weight to be processed through the
scale. The Damping Value parameter is a time interval specified in tenths of a second (10 = 1 second). This Damping Value is
used to determine the amount of time it takes for the scale to reach its final weight output. When Damping Value is set to ten, a
transition from 0 lb to 500 lb on the scale takes one second. The closer the weight gets to its final amount, the slower the weight
changes on the display.
Figure 16-5. 500 lb Displayed Weight Progression
0
500
0
500
DAMPVAL
When Full Weight
Value Displays
When Weight is Placed on Scale
and Full Weight Value Displays
When Weight
is Placed
on Scale
With No Damping With Damping