Saia-Burgess Controls AG
Manual for PCD2|3.W7x0
│ Document 26-
833 E
NG07 │ 2018-10-18
Configuration
3
3-2
Weight considered as empty
Empty
Empty
indicates the maximum weight used to assess whether the weighing vessel
is empty. One unit represents roughly the nominal loading of the cell divided by
30,000, i.e. for a 20 kg weighing cell, one unit will be approx. 0.7 grams.
Enable Autozero
Autozero
With
A utozero
equal to “1”, the scale is automatically reset to zero if it is empty.
The scale is considered to be empty if the residual weight is less than the value
entered for
Empty
.
Filter for differential weighing
Lowpass
To compensate for short-term fluctuations in the flow of material, the differential
weight is smoothed with a first-order filter. The value for the time constant for this
low-pass filter can be preset here.
The time constant is passed to the weighing module in encoded form:
Lowpass
Time constant for the filter
0
0.25 seconds
1
0.5 seconds
2
1 second
3
2 seconds
4
4 seconds
5
8 seconds
6
16 seconds
7
32 seconds
Check weight
This parameter is set to different values for scales calibrated with a check weight
and scales that work with calibrated weighing cells.
Calibration with check weight:
A “1” at the
Full
input calibrates the scale to the check weight. The check weight
must not exceed the maximum permissible weight for the scale. The actual value
of the check weight is stored as the
Check weight
parameter, with the format of
the weight display required. If the check weight is not placed on the scale for a
Full
calibration, an error message will be generated (bit 6 of the ErrorID).
The check weight should be at least 1/50 of the nominal loading of the weighing
cell.
Example:
Scale:
Nominal load for weighing cells: 200kg
Check weight:
50kg
With
Check weight
= 50,000, the resolution is 1 gram. The display range is then 0
to 200,000 grams.
With
Check weight
= 500, the resolution is 0.1 kg. The display range is then 0.0 to
200.0 kg.
