RADWAG WTC series Manuale utente
USER MANUAL
Counting scales – WTC/LW series
MANUFACTURER OF ELECTRONIC WEIGHING INSTRUMENTS
RADWAG 26 – 600 Bracka 28 Street, POLAND
Radom, phone+4848 3848 800, phone/fax +4848 385 00 10,
Sales Department +4848 366 80 06
www.radwag.com
MAY 2007
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TABLE OF CONTENTS
1. INTENDED USE - MAIN FUNCTIONS.......................................................3
2. CONSTRUCTION.......................................................................................3
2.1. Indicator...........................................................................................................3
2.2. Keyboard and display window.........................................................................4
2.3. Additional markers...........................................................................................4
2.4. Function buttons and functions........................................................................5
3. OPERATION...............................................................................................6
3.1. Tarring.............................................................................................................6
3.2. Zeroing............................................................................................................6
4. COUNTING PIECES WITH SAME UNIT MASS........................................7
4.1. Single piece mass is known ............................................................................7
4.2. By determination of single unit mass...............................................................8
5. SUMMING OF WEIGHING WHILE COUNTING PIECES..........................9
6. PROGRAM VALUE WHILE COUNTING PIECES ...................................11
7. ACCURACY OF THE SCALE...................................................................12
8. BACKLIGHT..............................................................................................13
9. BATTERY CHARGING.............................................................................13
10. TECHNICAL PARAMETERS..................................................................14
11. MESSAGES ON SCALE DISPLAY........................................................14
1. INTENDED USE - MAIN FUNCTIONS
Scales series WTC /LW are designed for counting pieces with same unit
mass. Counting process can be realized as:
Specification of sample mass (one piece)
Calculation of sample mass from some determined amount of
samples on the weighing pan
TARE functions allows for determination of net mass of measured loads – tare
range equal to max capacity of the instrument – Max.
Functional possibilities
−Setting alarm function for counting (threshold)
−Change of scale readability
−Totalizing in counting pieces mode
−Counting pieces
2. CONSTRUCTION
2.1. Indicator
Fig. 1 – Indicator construction
1 Fixing screws 7 Electronic PCB
2 Accumulator cover 8 Cover
3 Accumulator 9 Keyboard
4 Hausing 10 Display
5 Power supply socket 11 Tensometer connector
6 Press down plate 12 RS 232 connector
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2.2. Keyboard and display window
Fig. 2 – buttons and displays
Scales are equipped with three displays: mass, piece mass, quantity of
pieces, and functional keyboard with numeric and function keys.
2.3. Additional markers
Character Description
Zero indication of scale
Stable weighing result
TARE button applied – net indication
Display indicates total quantity of pieces (sum) or function
of summing details is active
Scale powered from mains
Power supply from battery is low (please charge the
battery)
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2.4. Function buttons and functions
1. Turn on/off
2. Confirm the quantity of pieces as a standard mass
3.
Pressing this button, will cause the display to show in field
WEIGHT, message “total” – display of total sum of counted
pieces
4. Deleting sum of counted pieces
5. Confirms mass of single unit mass
6. Possibility of setting a threshold for counting pieces mode
(after crossing this threshold, scale generates beep signal)
7. Deleting the value
8. TARE button (for determination of net mass)
9. ZERO button (setting zero point of the scale), switching on/off
scale’s backlight
10. Summing of following weighing for counting mode or change
of readability of the scale
11. Decimal point – for insertion of single unit mass value.
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3. OPERATION
3.1. Tarring
Place the package of the good(s) on the weighing pan. After stabilization of
weighing result, please press button TARE. Display will show ZERO
indication. Lower part of the display WEIGHT, the marker of tare application
will be visible.
Fig. 3 – Tarring of scale indication
After taking the load off the weighing pan, the display will show mass
indication with negative (minus) sign in front of mass.
Press button TARE, so that indication goes back to zero.
Tare function will be canceled automatically.
Tarring is available in all weighing range of the scale.
3.2. Zeroing
It is available in range up to +/- 2% of maximal capacity of the scale.
Procedure:
−If the scale indication is lower than 2% Max
−Press button ZERO to zero indication
−Markers of zero indication and stable result are visible
Fig. 4 – zeroing of scale indication
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−After taking the load off the weighing pan, mass indication with negative
(minus) sign is visible on the display
−Press button ZERO, indication will go back to zero.
4. COUNTING PIECES WITH SAME UNIT MASS
4.1. Single piece mass is known
In case unit mass of the counted objects is known, counting mode can be
realized in following way:
−Place on the weighing pan a container in which the pieces will be
counted, and press button TARE
−Using numeric keyboard, please insert unit mass. Use decimal point.
−Place counted pieces on the weighing pan of the scale.
−Press button
−Display described as COUNT will show quantity of pieces
−add following pieces, their quantity will increase automatically.
Fig. 5 – counting pieces
−take the weighed elements off the pan. In order to perform
another weighing / counting, insert another unit mass
and confirm it.
−Going back to weighing mode is possible after pressing
button for CANCELING
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4.2. By determination of single unit mass
If unit mass of counted objects is not known, please act as described below:
−Place a container for counting pieces on the weighing pan, and press
button TARE
−Using numeric keyboard of the indicator, insert quantity of pieces
(reference mass), which will be used to calculate single piece mass
CAUTION:
reference mass has to be natural number.
−Place counted pieces on the weight pan of the scale
−Press button
−Display described as UNIT WEIGHT will show unit mass of a sample
−Display described as COUNT will show quantity of details, used for
calculation of unit mass
−Add another details, their quantity will increase automatically.
Fig. 6 – counting pieces 2
−take the weighed elements off the pan. In order to perform another
weighing / counting, insert another unit mass and proceed as described
above.
−Going back to weighing mode is possible after pressing
button for CANCELING
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5. SUMMING OF WEIGHING WHILE COUNTING PIECES
While counting pieces, it is possible to use summing function. Please follow
below procedure:
1. Start counting pieces as described in points 4.1. or 4.2.
2. when scale shows quantity of pieces, press button PLUS
3. for a moment, quantity of pieces visible in display window COUNT with
be invisible, it is a signal that value has been accepted. At the same
time, display described as WEIGHT will show marker of summing: (M+)
Fig 7 – function for summing details
4. take the counted objects off the weighing pan (leave the container),
scale will go back to zero indication
5. put into the container another details, and press button PLUS
6. if the package needs to be changed, put it on the weighing pan, and
press button TARE. If the same package is still in use, and it is taken
off the pan together with the counted details, please tare the empty
package again, after placing it on the weighing pan of the scale.
7. In order to see quantity of summed details please
press button
8. The display with show headline of the operation, quantity of
summed weighing (in field UNIT WEIGHT) and total quantity
of details (in field COUNT).
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Fig. 8 – view of sum from a few weighings
9. Continuous summing of weighing is possible after
pressing button
10. Proceed according to points 5 – 7
CANCELING SUM OF COUNTED DETAILS
the moment, the sum of counted details is visible ( please see drawing no. 8),
and press button:
Scale will go back to weighing mode, sum marker will be no longer visible
(marker over M+will disappear).
Fig. 9 – cancelling sum of counted details
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