Fobitec WS-3 Bedienungsanleitung

User Instructions for Indicator WS-3

Tel. 0030 2310 795686

Fax. 0030 2310 795687

INDUSTRIAL AREA OF SINDOS THESSALONIKI 57022 P.O. BOX 1217 GREECE

CONTENTS

PROLOGUE..................................................................................................................................................2

USEFUL INFORMATION............................................................................................................................2

DESCRIPTION OF INDICATOR WS-3.....................................................................................................3

KEYBOARD FUNCTION.............................................................................................................................4

SYSTEM PARAMETERS........................................................................................................5

“Ad.FiLt” ADC Filter, Converter filter AD....................................................................5

“Ad.GAIn” ADC Gain.....................................................................................................5

“Ad.noiS.” ADC noise, Noise level at the load cell input........................................5

“Ad.driF.” ADC thermal drift correction.......................................................................6

“dec.Pnt.” (decimal point).............................................................................................6

“reSoL.” (resolution)......................................................................................................6

“d.FILt.”: Display Filter.................................................................................................6

“Comm.”: Communication Mode.................................................................................7

“Pr.dEL.”: Print Delay....................................................................................................7

“totAL”: Totalizing Weighing..........................................................................................8

"PASS": Password, User access to critical operations ...........................................8

“rESEt”: Reset, Restoring parameters in initial settings.........................................8

USER PARAMETERS.............................................................................................................9

“U.tArE”: User Tare,.......................................................................................................9

“P._____”: Maximum “empty scale” weight................................................................9

"P.-----": Maximum allowed scale weight......................................................................9

“CALIbr.”: Calibration......................................................................................................9

“FILtEr”: Filter..................................................................................................................9

“CLOCk”: Clock..............................................................................................................9

“HIStor.”: History..........................................................................................................10

“PrInt”: Print, Printing of all saved weighings..........................................................10

“CLEAr”: Clear, Clearing of the saved weighings...................................................10

TARE ZERO...........................................................................................................................10

Automatic Calculation of User tare ..................................................................................................10

FUNCTION OF TOTALIZING WEIGHING.............................................................................................10

ERROR CODES.........................................................................................................................................11

BASIC TECHNICAL CHARACTERISTICS ............................................................................................12

CONNECTIONS .........................................................................................................................................13

PROLOGUE

Thank you very much for choosing our electronic weighing scale. In order to use this scale

properly, we would like to ask you to read these instructions manual carefully.

USEFUL INFORMATION

-The indicator should be placed in a dry place in order to be protected from rain, from

getting wet, and it shouldn‟t be exposed to the sun for a long period of time.

-The indicator should be placed safely on its base or on a desk. Pay attention, as the

screen can get damaged from falling.

-The keyboard should be cleaned only with a dry cloth (DO NOT USE ANY CHEMICAL

SUBSTANCES)

-The keys are designed to be pressed by hands and you should never use them with any

other object.

-The scale that is connected with the indicator, should be placed in a stable and flat

surface, protected by air flow, current fluctuations, vibrations (and by water, if the scale‟s

load cell is not waterproof).

-You should never place weight on the scale higher than the MAXIMUM WEIGHT VALUE.

-You should never perform any welding, if you haven‟t removed earlier all the electronic

components (indicator - load cells - printer).

-To protect the indicator, it should always be off when it is not used and also use power

protection before its power supply.

-Turn on the scale 5‟ before use.

-For any additional information or issues of the scale you should contact the customer

service.

DESCRIPTION OF INDICATOR WS-3

1) 6 digit LED display

Display of weight: “-99999” .. “999999” with adjusted decimal point.

Display of parameters, messages, etc.

2) Display LED “0”, it lights when the weight measurement is placed in the minimum weight

range, which means that the scale is considered with no weight on.

3) Display LED “instability” of the weight. As long as it lights on, the weight measurement is

considered unstable.

4) Keys “MENU”, “ENTER”, “NEXT/PRINT”, “DOWN/TARE”, “UP/ZERO”

KEYBOARD FUNCTION

In the majority of operations, the keys have the following functions:

MENU:

Enters / Exits the parameters menu for adjustments, cancelation of numerical alteration, return a

level back to the menu structure, temporary pause/ cancelation of the weighing process.

Equipped with a LED, that lights up / flashes according to the user‟s operations.

ENTER:

Selection of function / parameter, validation of selection / number, passing to the next parameter.

It is used in the function “Totalizing Weightings” (“Total”), see below.

Equipped with LED, which lights up / flashes according to the user‟s operations.

NEXT / PRINT:

Change of the way of numbers‟ alterations, passing to the next digit during the number change

process. When the process begins, the displayed number can be altered using the keys UP /

DOWN.

DOWN / TARE:

Previous menu selection, reduction of digit / number during the process of number alteration.

Tare calculation (TARE) when the system is at rest and this is allowed (see system parameter

“PASS” ).

UP / ZERO :

Next menu selection, digit / number increase during the number alteration process. Tare serving

(ZERO) when the system is at weighing mode.

SYSTEM PARAMETERS

“SYS.Par.”: System parameters

System parameters are set on the menu “SYS.Par.”, on which we have access when we press

the keys “NEXT” and “MENU” simultaneously for 7 seconds while the system is in weighing

mode.

“Ad.FiLt” ADC Filter, Converter filter AD

The higher the value, the lower the weighing sample rate per second.

Value: 0 .. 3 Default: 1

adc filter : Hz

0 : 16.7

1 : 10

2 : 8,35

3 : 5

“Ad.GAIn” ADC Gain

It takes two values, 0 και 1. It must be 0 if the load cells connected have sensitivity higher or

equal to 20mV/V, while it must be 1 if the load cells connected have sensitivity lower or equal to

10mV/V.

Value: 0 .. 1 Default: 1

0 : gain X 1

1 : gain X 128

“Ad.noiS.” ADC noise, Noise level at the load cell input

It operates as a threshold for noise / microchanges rejection.

The higher the value the more “unconscious” becomes the system in microprojections,

which means it takes the measurement as „stable‟ easier, at the same time though the response

time increases in small weight changes.

It is influenced by the previous parameter System Parameter ADC Gain. Suggested values for

ADC Gain==0 are 2...15 while for ADC Gain==1 it is 30...100

Value: 1 .. 250 Default: 10

“Ad.driF.” ADC thermal drift correction - Thermal drift correction for the

converter AD

Displayed units per second.

Value: 0,0 .. 1,0 Default: 0,0

When it is higher than 0, it eliminates the very slow changes in the indication that usually

happens due to the thermal drift of the load cell and the AD converter. For example, if it is 0,2 it

eliminates the drift lower or equal to 0,2 units per second, which means 1 unit per 5 seconds,

while if it is 0,5 it eliminates 0,5 units per second, which means 1 unit per 2 seconds.

“dec.Pnt.” (decimal point)

Decimal Point position in weight display

Value: 0 .. 5 Default: 0

0 : “123456” …5 : “1.23456”

“reSoL.” (resolution)

Last digit Resolution in weight display

Value: 1, 2, 5 Default: 1

“d.FILt.”: Display Filter

Weight Display Filter. With 0 value it is completely rejected and the display response in

alterations becomes more direct. It filters more micro changes during higher values, however it

delays the response display of the indication.

Value: 0 .. 10 Default: 5

“Comm.”: Communication Mode

Communication port function (RS232)

Value: 0 .. 5 Default: 0

0 : without communication

1 : manual function, printing of the current weight indication and recording it to the

weighting history, by pressing the key “NEXT / PRINT” for a second.

2 : automatic function, printing and recording of the weighing history each time that the

scale is loaded and the weight remains stable for a certain time (see next parameter). If you want

to repeat the printing and registration, the scale should be unloaded (area „0‟) in between.

3 : manual function like „1‟, the tare functions are recorded as well (ZERO), the

calibration changes and the error reports also.

4 : automatic function like „2‟, the tare functions are recorded as well (ZERO), the

calibration changes and the error reports also.

5 : Continuous data transmission to the repeater or computer, “repeater mode”.

The device sends one string every 50msec in the following format:

[US/ST] ",GS," [+/-] [ weight] " kg" [LF]

where:

[US/ST] is 2 characters,

'US' when the measurement is unstable and

'ST' when it is stable

[+/-] is the sign of the weight measurement

[ weight] is the absolute weight value,

numerical characters „0‟ to ‟9‟ and the dot '.' as the decimal point

[LF] is the character LINE-FEED („\n'), end of line

Example: for stable weight 150,50 kg, the string will be

“ST,GS,+ 150.50 kg”

“Pr.dEL.”: Print Delay

Delay of the automatic printing, in seconds.

Value: 1 .. 10 Default: 3

“totAL”: Totalizing Weighing

Activates the function Totalizing Weighing.

Value: 0 .. 1 Default: 0

When this function is activated, the device shows (and saves to the indelible memory,

along with the user parameters) the number of the weighings totalized alongside the totalized

weight value.

For all of them to appear on the display, the user should press briefly (<0.4 secs.) the key

ENTER. The device will show on the screen “totAL “for 1 second, then “Id “followed by the

number of the weightings for 1 second and then it will display the total accumulated for 5

seconds or until another key is pressed. throughout all the above, the LED in the keys MENU +

ENTER are flashing to highlight the special situation.

To accumulate one of the displayed weights in the Total, the user needs to press ENTER

continuously ( >0.7 secs.). Then the message “tot.Add” appears and then the sequence of the

indications as described above in the display of the total.

To reset the total, the user needs to press briefly ENTER for the total to be displayed, and

then press continuously (>1 sec.) the ZERO (arrow up). Once zeroing is done, the message

“tot.Clr.” appears on the screen.

"PASS": Password, User access to critical operations

When it is "1" it allows the user to access critical functions / parameters.

Value: 0 .. 1 Default: 1

“rESEt”: Reset, Restoring parameters in initial settings

We choose number, in accordance to what we want to reset / restore.

Value: 0 .. 5 Default: 0

0 : return

1 : zeroing of weighting history

2 : zeroing of tare / calibration

3 : Restoration of user parameters

4 : Restoration of system parameters

5 : Total restore, execution of all the above from 1 to 4

USER PARAMETERS

“USr.PAr.”: User Parameters

In the menu “Usr.Par.”we have access when we briefly press the key "MENU".

“U.tArE”: User Tare,

With this selection the user can choose and set the tare weight, which will be deducted steadily

from the weighing and it will be reported in the printings of the weighing.

“P._____”: Maximum “empty scale” weight

It is not displayed when System Parameter Pass == 0.

When the weight on the scale is lower than this value, the scale is considered empty and it can

start / stop the weighing operation.

Value: 0 .. 199990 Default: 0 (decimal point depending on setting)

"P.-----": Maximum allowed scale weight

It is not displayed when System Parameter Pass == 0.

It must be set to the maximum permitted weight. When it is over that, the device displays

overload error.

Value: 0 .. 999999 Default: 999999 (decimal point depending on setting)

“CALIbr.”: Calibration

It is not displayed when System Parameter Pass == 0.

We place on the scale the known weight (if possible higher than the half of the maximum weight

value ). Then, we choose this function. We correct the indication to the desired weight, and we

press "ENTER" ("MENU" for cancellation). In case of inability to calibrate, an error message

appears (see below).

“FILtEr”: Filter

It is not displayed when System Parameter Pass == 0.

Integration filter for algorithm approximation of weight and vibration / noise rejection, the higher it

is, the slower the weight approximation.

Value: 0 .. 10 Default: 2

“CLOCk”: Clock

It is not displayed when printing is not On (System Parameter Print == 0 ).

The user checks / corrects the time and the date of the device, which is useful in printing.

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