
3-6
Table 3-4. Check Cal Percentage Selection/Module Position.
Module
Position
Resistance
(ohms)
1 Cell 2 Cells 3 Cells 4 Cells
1
13400
125%
114%
78%
59%
2
94800
125%
125%
110%
84%
3
15800
125%
97%
66%
50%
4
70400
41%
22%
15%
11%
5
546000
53%
28%
19%
14%
6
395000
74%
39%
26%
20%
7
309000
94%
50%
33%
25%
8
237000
125%
65%
44%
33%
Percent of Full Scale (2 mV/V) Output when Check Cal Button is Pressed.
3.5 FILTER SELECTION
3.5.1 Standard Filter.
Standard filtering offers simple successive
averaging of A-D conversions to stabilize the
output signal. Pressing and holding the enter
button accesses the selection mode: the
increment/decrement toggle switch changes the
setting. As the setting is changed, the OPTION
STATUS LED flashes to indicate the selection.
Average selections of 1, 2, 4, 8, 16, 32, 64 or 128
are available (Table 3-5).
Table 3-5. Standard Filter Selections
Setting
(Flashes)
Conversions
Averaged
1
1
2
2
3
4
4
8
5
16
6
32
7
64
8
128
Hold down enter key and toggle INC/DEC key for
selections.
3.5.2 Optional Digital Filtering.
Optional digital filtering offers the benefits of
successive averaging without the corresponding
delay in response time to real weight changes.
Digital filtering software determines the number of
A-I) conversions to be averaged on a moving basis
(Figure 3-3). Conventional averaging takes place
at the selected rate within a window of counts
defined as 'band (Table 3-6). If the signal exceeds
the band count limits, averaging continues on a
reduced basis within the larger window of counts
designated 'response'. Once the signal exceeds
both windows, band and response, averaging
stops until the signal begins to stabilize again. This
two-dimensional approach provides fast, accurate,
and stable weight data for difficult process
weighing applications. Consult BLH technical note
7D-071' for a complete explanation of optional
digital filtering.
Pressing and holding the ENTER button accesses
the filter selection mode: the increment/decrement
toggle switch changes the setting. As the setting is
changed, the OPTION STATUS LED flashes to
indicate the selection (one flash = setting one,
etc.). Table 3-6 (upper portion) defines the
parameters of each of the eight possible
selections. Releasing the ENTER button stores the