TScale JC 15, User Manual

Page: 17 / 30

JC series dual counting scale user’s guide
- 11-
6.3.1 Weighing a sample to determine the Unit Weight
To determine the average weight of the items to be counted place a known quantity of
the items on the scale and then enter the quantity being weighed.
The scale will then divide the total weight by the number of samples and display the
average unit weight.
• Zero the scale by pressing the Zero key if necessary. If a container is to be
used, place the container on the scale and tare as discussed earlier.
• Place a known quantity of items on the scale. After the “
Weight ” display is
stable enter the quantity of items using the numeric keys followed by pressing
the
Smpl key. The number of units will be displayed on the " Count " display and
the computed average weight will be shown on the " Unit Weight " display.
• As more items are added to the scale, the weight and the count will increase.
• If the scale is not stable, the calculation will not be completed.
• If the weight is below zero, “
Count ” display will show negative count.
6.3.2 Entering a known Unit Weight
• If the unit weight is already known then it can be entered using the keypad.
• Enter the value of the unit weight using the numeric keys followed by pressing
the
U. Wt. key within few seconds while the display is flashing. If no action is
initiated within a few seconds, the " Unit Weight ” display will revert to the
previous value, otherwise it will show the new value that has been entered.
• The sample is then added to the scale and the weight will be displayed as well
as the quantity based upon the unit weight. When weighing in kilograms the unit
weight is shown in grams. When weighing in pounds the unit weight is shown in
pounds.
• After the unit weight has been determined or entered, the scale can be used
for parts counting. The scale may be tared to account for the net weight as
discussed in an earlier section.
• After the scale is tared, the items to be counted are added and the "
Count "
display will show the number of items computed using the weight and the unit
weight.
• It is possible to increase the accuracy of the unit weight at any time during the
counting process by manually entering the sample quantity and then pressing
Smpl . Ensure that the quantity displayed matches the quantity on the scale
before pressing the key. The unit weight will be adjusted based upon a larger
sample quantity
providing greater accuracy when counting larger sample sizes.
6.3.3 Automatic update of unit weight
• The scales will automatically update the unit weight when a sample less than
the initial sample count is added. A beep will be heard when the value is
updated. It is wise to check the quantity is correct when the unit weight has been
updated automatically.
• To lock the unit weight and prevent Auto-update, press
U.Wt.
• This feature is turned off as soon as the number of items added exceeds the
count used as a sample.