GSE 574 - Table 4 Minimum Sampled Weight Accuracy Requirements

GSE Scale Systems - 71
Chapter 6 Counting Mode Technical Reference Manual
alpha display, where the "xx" is the total maximum
number of parts that may be on the scale in order for an
enhancement to occur. Additional parts may then be
added, up to the number shown. As soon as motion
ceases, if the quantity displayed is more than the original
sampled amount and less than the displayed maximum
enhance amount then the piece weight will be re-
calculated. Then the achieved accuracy will be re-
evaluated. If the required accuracy still has not been
achieved, another enhancement will be required and this
step will be repeated with a larger maximum enhance
amount. If more parts than specified are added, the
display will read Code 53 Accy >Req'd indicating that
the required accuracy has not been achieved and
counting may not continue.
ACHIEVED ACCURACY MEETS OR EXCEEDS
SETUP REQUIREMENTS:
Achieved accuracy is insufficient to allow an
enhancement to occur: The message Can't Enhnc is
displayed briefly. This will not normally occur unless
the sampled number of parts was very large and / or the
piece weight was relatively small.
Sampled amount is sufficient to allow enhancements:
The maximum number of parts which can be counted
and allow an enhancement to occur is displayed briefly
and the quantity is then displayed.
In order for a given accuracy to be achieved, the weight
of the sampled parts must meet or exceed a specific
minimum. Table 4, Minimum Accuracy Weight
Requirements shows the required sample weight for
various accuracy requirements on a variety of platform
capacities. Table 4 is calculated for the filter selection of
8 seconds. It also is based on a load cell full scale input
of 2 mV/V. If a 1 mV/V full scale cell is used, all
minimum weight requirements should be 2 times the the
value stated. If a 3 mV/V cell is used, the value should
be 2/3 the value shown.
If a different filter selection is used other than the 8
second filter, refer to table 5 for minimum weight
required multiplication factors. Take the minimum
weight required value from the table using the 8 second
filter and multiply it by the factor for the specified filter
selection. This will yield the minimum weight required
for the new filter selected.
Note however, that parts counting based on weight is
dependent on a reasonably consistent part weight. Some
SECTION - 6.1
Required
Accuracy
90%
91%
92%
93%
94%
95%
96%
97%
98%
98.48%
99%
99.20%
99.40%
99.60%
99.68%
99.8%
99.88%
99.96%
Percent of
Capacity
0.00504%
0.00576%
0.0063%
0.0072%
0.00846%
0.0108%
0.0126%
0.01683%
0.0252%
0.033%
0.0504%
0.063%
0.0846%
0.126%
0.1575%
0.252%
0.4212%
1.26%
2 lb
Platform
0.0001008 lb
0.0001152 lb
0.000126 lb
0.000144 lb
0.0001692 lb
0.0002016 lb
0.000252 lb
0.0003366 lb
0.000504 lb
0.000666 lb
0.001008 lb
0.00126 lb
0.001692 lb
0.00252 lb
0.00315 lb
0.00504 lb
0.008406 lb
0.0252 lb
10 lb
Platform
0.000504 lb
0.000576 lb
0.00063 lb
0.00072 lb
0.000846 lb
0.001008 lb
0.00126 lb
0.001692 lb
0.00252 lb
0.00333 lb
0.00504 lb
0.0063 lb
0.00846 lb
0.0126 lb
0.01575 lb
0.0252 lb
0.04212 lb
0.126 lb
50 lb
Platform
0.00252 lb
0.00288 lb
0.00324 lb
0.0036 lb
0.00432 lb
0.00504 lb
0.0063 lb
0.00846 lb
0.0126 lb
0.01674 lb
0.0252 lb
0.0315 lb
0.0423 lb
0.063 lb
0.07884 lb
0.126 lb
0.2106 lb
0.63 lb
200 lb
Platform
0.01008 lb
0.01152 lb
0.0126 lb
0.0144 lb
0.01692 lb
0.02016 lb
0.0252 lb
0.03366 lb
0.0504 lb
0.0666 lb
0.1008 lb
0.126 lb
0.1692 lb
0.252 lb
0.315 lb
0.504 lb
0.8424 lb
2.52 lb
Table 4, Minimum Sampled Weight Accuracy Requirements