Avery Weigh-Tronix PC-905, User Instructions

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16 PC-905 Counting Scale User Instructions
Scale Setup and Operation
3.10 Using Reverse Sampling for Counting, Method 2
Method 1 or 2 are chosen in the
Service Menu. See the Service
Manual for instructions. Reverse sampling, method 2, is independent of the bulk or dribble modes. It
does not matter which of those you have enabled.
Reverse sampling occurs when you place an unknown number of items on
the scale, determine a piece weight (by method 1 or 2), and the scale counts
items as they are removed from the scale.
Method 1 and 2 are slightly different. Method 1 results in negative counts as
parts are removed. Method 2 results in positive counts as parts are removed.
Method 2 is explained below, method 1 in the previous section.
Method 2 can be done with or without taring a container. Both ways are
explained below:
Method #2 - With a Tare
Weight
1. Enter a tare weight by keying in a known tare weight and pressing the
TARE key, or place an empty container on the scale and press the
TARE key.
2. Place the full container on the scale.
3. Press the SAMPLE key. . .
ADD XXX is displayed.
4. Remove the number of parts shown by the ADD XXX prompt. . .
The display will flash ADD XXX .
5. Press the SAMPLE key. . .
The display will show the number of parts remaining in the
container.
6. Place the parts that were sampled back into the container. . .
The total number of parts is displayed.
7. If you want to see positive counts as items are removed from the
scale, press the
ZERO key. . .
The scale will clear the count and tare value and as parts are
removed from the scale, the display will show a positive number.
Method #2 - Without a Tare
Weight
1. Without a tare weight entered place full container on the scale.
2. Press the SAMPLE key. . .
ADD XXX is displayed.
3. Remove the number of parts shown by the ADD XXX prompt. . .
The display will flash ADD XXX .
4. Press the SAMPLE key. . .
The display will show the number of parts removed from the scale.
5. Keep removing parts to see the total number removed.
6. You can add more parts to the scale, then press the ZERO key to zero
the count and continue removing parts and counting what you
remove.