Display Mode Parameters - Rice Lake 482-AG Technical Manual

Filter Sensitivity (RFSENS) and Threshold (RFTHRH)
The rolling averaging filter can be used by itself to eliminate vibration effects, but heavy filtering also increases settling time.
The RFSENS and RFTHRH parameters can be used to temporarily override filter averaging and improve settling time.
• RFSENS specifies the number of consecutive A/D readings that must fall outside the filter threshold before filtering is
suspended
• RFTHRH sets a threshold value, in display divisions; When the specified number of consecutive A/D readings fall
outside of this threshold, filtering is suspended; Set RFTHRH to NONE to turn off the filter override; Adaptive Filter and
Rolling Filter Sub-menu Parameters
Setting the Rolling Averaging Filter Parameters
1. Set the rolling filter stage parameters (RFSTG1-3) to 1.
2. Set the Rolling Filter Cutout Threshold (RFTHRH) to NONE.
3. Return to the weigh mode.
4. Remove all weight from the scale, then watch the indicator to determine the magnitude of vibration effects on the
scale.
5. Record the weight below which all but a few readings fall. This value is used to calculate the RFTHRH parameter in
step 8.
Example – if a heavy-capacity scale (10000 x 5 lb) produces vibration-related readings of up to 50 lb, with occasional
spikes to 75 lb, record 50 lb as the threshold weight value.
6. Place the indicator in configuration mode and set the rolling filter stage parameters (RFSTG1-3) to eliminate the
vibration effects on the scale. Leave RFTHRH set to NONE.
7. Determine the lowest effect value for the RFSTG1-3 parameters. If needed, the rolling filter cutout sensitivity
(RFSENS) and the rolling filter cutout threshold (RFTHRH) can be used to reset the averaging filter so the response to
a rate change is faster.
8. Calculate the RFTHRH parameter value by converting the weight value recorded in Step 5 to display divisions:
(Threshold_Weight_Value / Display_Divisions).
In the example in Step 5, with a threshold value of 50 lb, and a display divisions value of 5 lb, RFTHRH should be set
to 10DD.
9. Set the RFSENS parameter high enough to ignore transient peaks. Longer transients (typically caused by lower
vibration frequencies) will cause more consecutive out-of-band readings, so RFSENS should be set higher to counter
low frequency transients.
3.1.2

Display Mode Parameters

Parameter Settings
GROUP WGDELTA Weight Delta – percentage that the display value must drop before the scale returns to live weighing; valid values are 0-99%.
Default: 00
LIVE — Live Mode – if enabled, the indicator always displays the current scale weight
HOLD SPTIME Display Mode Sampling Time – amount of time in seconds that the indicator will sample the scale before it displays the
average of those samples; Valid values are 1-10 seconds; Default: 2
HDELTA Hold Delta – percentage that the display value must drop before the scale returns to live weighing;
valid values are 0-99%. Default: 00
HDTHRS Hold Delta Threshold – when the weight reaches the threshold value, the HDELTA function is disabled;
valid values are 0000 - 9999; Default: 500
Description
Table 3-4. Display Mode Parameters
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Configuration
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