Salter Brecknell 650 - Manual (Page 13)

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3.3.4 CLEARING A TARE
1. To clear a tare, press the CLR key twice at any time. The TARE and NET annunciator
disappears and gross weight is displayed.
3.3.5 PIECE COUNTING
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 “Sample” soft key.
Piece counting is accomplished by determining an average piece weight (APW). The two
variables that affect the accuracy of the APW are the number of samples used and the total
weight of the samples. The 650 allows you control over these two variables. See section 5.3.1
Minimum Accuracy Feature and see section 5.3.2 Minimum Sample Size. Setting these two
functions guards against an APW of the items that is too light and also guards against the total
weight of the sample being too light. Accuracy cannot be guaranteed without adequate sample
size and sample weight. If the sample pieces don’t meet the minimum requirements, you will get
an error message to add additional pieces to achieve the preset level of counting accuracy.
3.3.5.1 Create a new APW from sampling
1. If the items you will be counting require a container, you must first place the empty
container on the scale platform and then press the “Tare” soft key. The scale switches
to NET mode and sets the displayed weight to zero.
NOTE: Enabling the Auto Tare feature in the Supervisor Menu (Chapter 5) can
eliminate this step.
2. Press the “Sample” soft key. The scale will display “ Add X PCS to Platter then Press
the ENT key” as determined from section 5.3.2 Minimum Sample Size. You may
choose a larger sample size from the soft keys or press the KEYIN soft key and enter
any size sample number.
3. Place the sample pieces on the platform all at once and press the ENT key to complete
the sample process. If the sample pieces used meet the accuracy criteria set in section
5.3.1 Minimum Accuracy Feature and 5.3.2 Minimum Sample Size, the scale will now
calculate the APW and display the number of pieces and APW on the scale. If it does
not, the scale displays a prompting message to add a certain number of pieces to
continue piece counting.
NOTE 1: You can eliminate the need to press the ENT key by enabling the Auto
Sampling feature in the Supervisor Menu (Chapter 5).
NOTE 2: You can program the scale to automatically switch from the local scale to
the remote scale (if equipped) by enabling the Auto Switch Channel feature in the
Configuration Menu (Chapter 5). The scale will automatically switch channels after a
successfully sample has been made.
3.3.6 CLEARING THE PIECE COUNT
1. To clear the piece count, either press the CLR key twice or press the SAMPLE soft key
and begin a new sample process.
NOTE: You can eliminate the need to press the CLR key by enabling the Auto Tare
APW Clear feature in the Configuration Menu (Chapter 5). Be careful here, enabling auto
clear functions require a new tare and APW input each time the scale weight goes to zero.