39
8.10 Scale Filtering Parameters
19 Display Update Rate (0)
This parameter will set the LED display update rate. The update rate has
nothing to do with the actual AD converter update rate or filtering. The
parameter may have a value between 0-9. A value of 0 will introduce no delay
in the display update, while a maximum value of 9 will introduce a display
update rate of a 3-second delay. The update rate at a value of 0 is very fast and
the display may appear jittery in some applications. In this case increase the
value of this parameter.
41 Digital Averaging Filter (64)
Changing this parameter changes the mount of averaging performed on the
final weight. This function is used to help filter the scale from vibrations and
display a stable weight. The default setting should be adequate for most
installations however if heavier filtering is required then increase the filter
value. Changing the filter does alter the settling time for the final weight
response. Values that can be entered are 1-255 followed by the [TARE] key.
The higher the number the heavier the filtering. Error 14 is displayed for an
invalid entry.
42 Filter Faststep threshold (8)
The filter averaging system has a filter bypass mode called faststep. Faststep
dramatically improves the display response time for a step change in weight.
When the faststep mode is active the digital averaging filter is bypassed
(parameter 41) displaying an instant change in weight. The threshold or the
amount of instant weight change that has to occur before the indicator is to go
into faststep mode is defined by this parameter. This parameter normally does
not have to be changed. Let us look at an example, we have a 500lb-floor
scale. The faststep value is 8. If a 200 pound man jumps on the scale, the scale
will go into faststep mode, bypassing the averaging filter and displaying a
quick jump to 200lbs. When the final weight is settling filter averaging is
returned back to normal weight averaging. If you place a 5 pound weight on
the scale the faststep will not kick in and the weight change will be a little
slower. How slow the weight changes to the 5lb load is a function of
parameter 41.
43 Fastep Sensitivity (8)
This parameter normally does not need to be changed, and may be removed in
future releases of the software. This parameter controls how sensitive faststep
is to be (see parameter 42). The value entered here indicates how many AD
samples the weight has to change in a row before the faststep filter kicks in.
For example a 200 pound man jumps on a 500 pound scale. The “Faststep
parameter” 42 has been set to 20 and the “Fastep Sensitivity” parameter 43 has
been set to 5. Only when a weight change of more than 20lbs and has occurred
5 samples in a row then the filter averaging will go into fastep
mode. Increasing this parameter makes the Fastep filter threshold less
sensitive.
44 Disable Faststep (0)
