Salter Brecknell 800 Series - Manual (Page 33)

7.3.5 PIECE COUNTING - UNKNOWN AVERAGE PIECE WEIGHT
This mode is used to indicate the number of pieces of an item you have placed on
the scale’s platform and is accessed by pressing the UNITS key. To ensure
accuracy, the parts you are counting must be consistent in weight.
The indicator uses the sampling method to determine the average piece weight
(APW) of the items you wish to count. When sampling items, always count the parts
in your hand and place them on the platform all at once. If the APW of the items is
too light or the total weight of the sample is too light, accuracy cannot be
guaranteed. You will get an error message, but piece counting will still be allowed.
For your convenience, the 800 series indicator retains the APW value even when
the unit is powered off.
NOTE : Piece counting must be enabled in the Setup Menu in order to use this
feature. See Chapter 4 for more information.
1. If the items you will be counting require a container, you should first tare off the
weight of that container by following the appropriate procedure in either Section
7.3.2 or Section 7.3.3.
2. Press the SAMPLE key. The indicator displays “10 0” and is prompting you to
place ten identical items on the platform.
NOTE: If you wish to change the sample number, simply press the SAMPLE key
repeatedly until the desired sample number appears. Available choices are 20,
50, 100, 200 and 500.
3. Place the sample items on the platform all at once and allow the weight indication
to stabilize. If the total weight of the sample is sufficient, the zero indicated after
the sample number will change to a “–“. For example, “10 –“. If it does not,
repeat Step 2 to increment the sample size. If you cannot obtain the proper
message after 500 pieces, the APW of the items you wish to count is too light for
your scale to process accurately.
4. Press the SAMPLE key again to take the sample. The indicator now displays the
number of pieces on the platform.
5. To exit the piece count mode, press the UNITS key. The same APW value will
remain in scale memory until you repeat Step # 2.
NOTE : There is an alternative method to the one described above which allows you
to enter non-standard sample values. This alternative procedure follows below.
1. If the items you will be counting require a container, you should first tare off the
weight of that container by following the appropriate procedure in either Section
7.3.2 or Section 7.3.3.
2. Place the sample items on the platform all at once and allow the weight indication
to stabilize.
3. Use the numeric keys to enter the number of items you have placed on the
platform.
4. Press the SAMPLE key to take the sample. If the sample size and weight is
sufficient, the indicator now displays the number of pieces on the platform.
5. To exit the piece count mode, press the UNITS key. The same APW value will
remain in scale memory until you repeat Step # 2.