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

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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