8400-M022-O1 Rev K
Model 190 Indicator
23
Filter Setting Recommendations
Non-Critical Sample Rate
If the sample rate is not critical, as in static weighing, set:
dFLt=
0
(
F=2
,
b=
1),
dFLt=
1
(
F=
6,
b=
12,
Sr=
2),
or
dFLt=
2
(
F=20
,
b=12
,
Sr=
1).
Digital Filtering (
dFLt=
) selections 0, 1, and 2 have fixed factory settings for Filter
Level, Break Range, and Sample Rate.
Critical Sample Rate
If the sample rate is critical, as in a filling operation, use Custom Filtering
(set
dFLt=
to “3”).
1.
Sr=
SAMPLE RATE (1 to 120 samples/second) determination:
Set the sample rate as close as possible to produce a display graduation change for
every graduation of material added to the scale.
Material Flow Rate (lbs/second)
Resolution
EXAMPLE: 100lbs/sec
10lbs
2.
b=
BREAK RANGE (1 to 255 graduations) determination:
Turn the filtering off by setting the
dFLt=
setting to “0”. Operate the system as it will be
normally used and, by observation, determine the number of grads of instability that
needs to be filtered out. Set the break range (
b=
) to that value.
Weight Change
Graduation Value
EXAMPLE: 20,000 x 10lb capacity scale with 800lb variation in the weight display.
800
10
3.
F=
FILTER SETTING (1 to 99) determination: Set to desired results.
4.
If stability is unacceptable with any setting of
F=
, reduce the sample rate and/or increase
the break range,
b=
setting for increased filtering.
=
Sr
= 10s/s =
Sr
=
b
=
b
= 80
