Audit Trail Support; Conversion Factors For Secondary Units; Digital Filtering; Digital Rolling Average Filter (Avgonl) - Rice Lake Synergy 680HE Technical Manual

11.4 Audit Trail Support

Audit trail support provides tracking information for configuration and calibration events. To prevent potential misuse, all
configuration and calibration changes are counted as change events.
Audit trail information can be printed from Revolution or by sending the DUMPAUDIT serial reporting command. Revolution can
be used to display audit trail information. The audit trail display includes the legally relevant (LR) version number (firmware
version for the code which provides audit trail information), a calibration count and a configuration count.
See Section 3.4.10 on page 18

11.5 Conversion Factors for Secondary Units

The 680HE has the capability to mathematically convert a weight into many different types of units and instantly display those
results with a press of the
Units
Secondary units can be specified on the Format menu using the SECNDR parameter.
Multipliers are preconfigured within the indicator.
Note
Ensure the secondary decimal point position is set appropriately for the scale capacity in the secondary units.

11.6 Digital Filtering

Digital filtering is used to create a stable scale reading in challenging environments. The 680HE allows selection of Digital
Rolling Average Filtering
(Section
page 67) or None (RAW) for no filtering. See
parameter.
The scale's sample rate effects all types of filtering. The A/D sample rate is selected by the SMPRAT scale parameter. The A/D
sample rate is the number of weight readings the indicator takes per second (SMPRAT). This can be 6.25, 7.5, 12.5, 15, 25, 30,
50, 60 or 120 hertz (readings per second). Set the A/D sample rate to the lowest setting required for the application. Lower
settings result in better stability.

11.6.1 Digital Rolling Average Filter (AVGONL)

The digital rolling average filter uses mathematical averaging with three stages. These configurable stages control the effect of
a single A/D reading on the displayed weight. When an A/D reading outside of a predetermined band is encountered, the digital
rolling average filter is overridden and the display jumps directly to the new value.
Digital Filter Stages (DIGFL1-3)
The filter stages can each be set to a value of 1–256. The value assigned to each stage sets the number of readings received
from the preceding filter stage before averaging. Setting the filter stages to 1 effectively disables the rolling filter.
A rolling average is passed to successive filtering stages for an overall filtering effect which is effectively a weighted average of
the product of the values assigned to the filter stages (DIGFL1 x DIGFL2 x DIGFL3) within a time frame corresponding to the
sum of the values (DIGFL1 + DIGFL2 + DIGFL3).
Digital Filter Sensitivity (DFSENS) and Threshold (DFTHRH)
The rolling averaging filter can be used by itself to eliminate vibration effects, but heavy filtering also increases settling time.
The DFSENS and DFTHRH parameters can be used to temporarily override filter averaging and improve settling time.
• DFSENS specifies the number of consecutive A/D readings which must fall outside the filter threshold (DFTHRH) before
filtering is suspended
• DFTHRH sets a threshold value, in display divisions; When the specified number of consecutive A/D readings
(DFSENS) fall outside of this threshold, filtering is suspended; Set DFTHRH to NONE to turn off the filter override
for steps to view the Audit Trail counters.
key.
11.6.1), Adaptive Filtering
Section 4.4.1 on page 23
© Rice Lake Weighing Systems ● All Rights Reserved
66), Damping
(Section 11.6.2 on page
for configuration menu layout and the location of FLTCHN
Appendix
(Section 11.6.3 on
65