Table of Contents
Advertisement
™
Advanced Rattletrap
digital filtering (selections with RT after the
number) indicate a mode that can be viewed as a hybrid combination of
the best features of analog and digital filtering. RATTLETRAP™ uses a
vibration-dampening algorithm developed in actual industrial applica-
tions with extreme vibration present. This filtering mode evaluates the
frequency of a repeating vibration, then derives a composite displayed
weight equal to the actual weight on the scale less the vibration-induced
flaws. It is particularly effective for eliminating repeating vibration or
mechanical interference from nearby machinery. RT selections will
eliminate much more mechanical vibration than standard digital
filtering, but usually also increase settling time over standard digital
filtering.
CONFIG
SCALE 1
DIGFLTR
1
2
4
8
16
32
64
128
4 RT
8 RT
16 RT
32 RT
64 RT
128 RT
Digital filtering is most effective in eliminating effects of mechanical
noise and vibrations when combined with analog filtering. Such
mechanical noise usually shows on the display as a random changing of
the least-significant digit. The trade off with using a high number of
averages (and therefore a very accurate reading) is that the settling time
increases as the number of averages chosen increases. So even though
the higher-numbered selections give a more accurate reading, if speed
of display is important use the lowest selection which gives a stable
display.
When using digital filtering, analog filtering is usually set to High
(2 Hz). When testing the effect of the analog filter, set the digital filter
to 1.
Appendix
9-5
Advertisement
Table of Contents
