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STATISTICAL QUALITY CONTROL (SQC)
The statistical quality control (SQC) feature is useful
during various types of process filling operations, to
monitor and/or control the process to eliminate
under- and over-filling.
As samples are weighed and stored in the balance, a
trend analysis is developed and can be displayed.
Up to 10 batches with up to 80 samples in a batch
are visible for quality control purposes. Each batch of
samples is shown, with the maximum, minimum, standard
deviation and mean values for each batch. An ongoing
examination of the relative deviation of the samples
along with other statistical data can be viewed.
The filling process operation can be effectively monitored
by observing the results on the view trace screen.
SQC collection can be done manually (manual mode,
requires key press after each step) or automatically
(auto mode, the weights are automatically recorded
when stable).
In the upper left portion of the home screen, select SQC.
EDIT SETTINGS
1. Confirm the default values (Nominal, Inaccuracy,
Imprecision, Density, Atmospheric Pressure, Water
Temperature, etc.) are correct.
2. To view/edit the default values, touch the EDIT
SETTINGS button.
3. The Settings screen appears.
• Settings Available: NOMINAL TARGET WEIGHT,
+TOLERANCE 1, -TOLERANCE 1, +TOLERANCE 2,
-TOLERANCE 2
• Functions Available: RETURN TO APPLICATION
4. To adjust the Nominal Target weight value, touch the
NOMINAL button. A numeric input window appears.
5. Key in the desired Nominal Weight, then press √. The
display returns to the previous screen with the new
value highlighted.
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OPERATION CONTINUED
6. Continue to enter the required information following
• Positive Tolerance 1, via the +TOLERANCE 1 button.
• Negative Tolerance 1, via the -TOLERANCE 1 button.
• Positive Tolerance 2, via the +TOLERANCE 2 button.
• Negative Tolerance 2, via the -TOLERANCE 2 button.
7.
BEGIN THE SQC PROCESS
1.
2. First batch: the screen prompts for the batch name.
3. Enter the batch name, then press √.
4. The process screen is then displayed. Follow the
5. The current number of samples, along with the average,
6. Continue to follow the screen instructions by weighing
the above procedure:
NOTE: Tolerances can be in either weight (default)
or percent.
When finished, press RETURN TO APPLICATION and the
SQC home screen appears.
Touch the BEGIN NEW BATCH button.
screen instructions, then press ACCEPT to store the
sample weight.
sum, minimum value, maximum value and range are
displayed.
samples and pressing ACCEPT to store each sample's
weight. The sample size is 10 (default). It can be
changed in Setup from 2 to 80 pieces.
0924 IH-4737
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