RADWAG WLC/A1/C/2 User manual

WLC
USER MANUAL
WLC/A1/C/2 Precision Scale
WLC/A2/C/2 Precision Scale
WLC/A2 Precision Scale
ITKU-105-08-11-18-EN

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NOVEMBER 2018

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CONTENTS
1. GENERAL INFORMATION............................................................................................................................5
2. PRECAUTIONS .............................................................................................................................................5
2.1. Operation ................................................................................................................................................ 5
2.2. Battery Power Supply.............................................................................................................................. 5
2.3. Operation under Conditions Difficult due to Electrostatics ....................................................................... 6
3. WARRANTY CONDITIONS...........................................................................................................................6
4. DESIGN .........................................................................................................................................................7
4.1. Dimensions ............................................................................................................................................. 7
4.2. Connectors Arrangement ........................................................................................................................ 8
4.3. Pins Overview ......................................................................................................................................... 8
5. UNPACKING AND INSTALLATION..............................................................................................................9
5.1. Under-Pan Weighing ............................................................................................................................... 9
6. START-UP AND OPERATION.....................................................................................................................10
6.1. Levelling................................................................................................................................................ 10
6.2. Connecting the Scale to the Mains ........................................................................................................ 10
6.3. Warm-Up Time...................................................................................................................................... 11
6.4. Battery Charge Status ........................................................................................................................... 11
6.5. Battery Charge Status Check ................................................................................................................ 12
7. MAINTENANCE ACTIVITIES ......................................................................................................................12
7.1. Cleaning ABS Components................................................................................................................... 12
7.2. Cleaning Glass Components................................................................................................................. 12
7.3. Cleaning Stainless Steel Components................................................................................................... 13
7.4. Cleaning Powder-Coated Components ................................................................................................. 13
7.5. Cleaning Aluminium Components ......................................................................................................... 13
8. OPERATION PANEL...................................................................................................................................14
9. KEYS ...........................................................................................................................................................14
10. PROGRAM STRUCTURE..........................................................................................................................15
10.1. Function Groups.................................................................................................................................. 15
10.2. Operating the Menu ............................................................................................................................ 16
10.3. Return to the Weighing Mode.............................................................................................................. 16
11. WEIGHING OPERATION...........................................................................................................................16
11.1. Good Weighing Practice...................................................................................................................... 17
11.2. Zeroing................................................................................................................................................ 17
11.3. Taring.................................................................................................................................................. 18
11.4. Entering Tare Value Manually ............................................................................................................. 18
11.5. Dual Range Devices............................................................................................................................ 18
11.6. Units.................................................................................................................................................... 19
11.6.1. Start Unit .................................................................................................................................. 19
11.6.2. Temporary Unit......................................................................................................................... 20
12. ADJUSTMENT........................................................................................................................................... 20
12.1. External Adjustment ............................................................................................................................ 21
12.2. User Adjustment.................................................................................................................................. 22
12.3. Manual Internal Adjustment................................................................................................................. 22
12.4. Automatic Internal Adjustment............................................................................................................. 23
12.5. Automatic Internal Adjustment Time.................................................................................................... 24
12.6. Adjustment Test .................................................................................................................................. 24
12.7. Adjustment Report .............................................................................................................................. 25
13. SCALE PARAMETERS.............................................................................................................................25
13.1. Filter.................................................................................................................................................... 25
13.2. Value Release..................................................................................................................................... 25
13.3. Ambient Conditions ............................................................................................................................. 26
13.4. Autozero Function ............................................................................................................................... 26
13.5. Tare Function...................................................................................................................................... 26
13.6. Tare: Enter Mode ................................................................................................................................ 27
13.7. Tare: Values Memory.......................................................................................................................... 27
13.7.1. Entering Tare Value to the Weighing Device Memory .............................................................. 27
13.7.2. Selecting Tare Value from the Weighing Device Memory ......................................................... 28
13.8. Last Digit ............................................................................................................................................. 28
14. COMMUNICATION....................................................................................................................................29
14.1. RS232 (1) Port Settings ...................................................................................................................... 29
14.2. RS232 (2) Port Settings ...................................................................................................................... 29
14.3. USB A Port.......................................................................................................................................... 29

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14.4. USB B Port.......................................................................................................................................... 30
15. PERIPHERAL DEVICES............................................................................................................................32
15.1. Computer ............................................................................................................................................ 32
15.1.1. Computer Port .......................................................................................................................... 32
15.1.2. Continuous Transmission .........................................................................................................32
15.1.3. Printout Interval for Continuous Transmission .......................................................................... 33
15.2. Printer ................................................................................................................................................. 33
15.2.1. Printer Port ............................................................................................................................... 33
15.3. Additional Display................................................................................................................................ 33
15.3.1. Additional Display Port ............................................................................................................. 34
16. PRINTOUTS ..............................................................................................................................................34
16.1. Adjustment Report .............................................................................................................................. 34
16.2. GLP Printout ....................................................................................................................................... 35
17. MISCELLANEOUS PARAMETERS...........................................................................................................36
17.1. Backlight ............................................................................................................................................. 36
17.2. 'Beep' Sound....................................................................................................................................... 36
17.3. Automatic Shutdown ........................................................................................................................... 36
17.4. Date and Time..................................................................................................................................... 37
17.5. Default User Settings .......................................................................................................................... 37
18. SCALE DATA............................................................................................................................................38
19. WORKING MODES – General Information..............................................................................................38
19.1. Running Working Mode....................................................................................................................... 38
19.2. Working Modes Local Settings ............................................................................................................ 39
19.2.1. Working Mode Accessibility......................................................................................................39
19.2.2. Save Mode ............................................................................................................................... 39
19.2.3. Automatic Printout Time Interval............................................................................................... 40
19.2.4. Lo Threshold ............................................................................................................................ 40
20. WORKING MODE – WEIGHING................................................................................................................41
20.1. Local Settings...................................................................................................................................... 41
21. WORKING MODE – PARTS COUNTING..................................................................................................41
21.1. Local Settings...................................................................................................................................... 41
21.1.1. Selecting Operation Mode ........................................................................................................41
21.2. Setting Sample Mass by Entering Mass of a Single Part..................................................................... 42
21.3. Setting Sample Mass by Determining Mass of a Single Part ............................................................... 42
22. WORKING MODE – +/- CONTROL...........................................................................................................43
22.1. Local Settings...................................................................................................................................... 43
22.2. Declaring Checkweighing Thresholds ................................................................................................. 43
23. WORKING MODE – PERCENT WEIGHING.............................................................................................. 44
23.1. Local Settings...................................................................................................................................... 44
23.1.1. Selecting Operation Mode ........................................................................................................44
23.2. Reference Sample Mass Determined by Weighing ............................................................................. 45
23.3. Reference Sample Mass Determined by Entering the Mass Value...................................................... 45
24. WORKING MODE – PEAK HOLD.............................................................................................................45
24.1. Local Settings...................................................................................................................................... 45
24.2. Peak Hold Operation........................................................................................................................... 46
25. WORKING MODE – TOTALIZING............................................................................................................. 46
25.1. Local Settings...................................................................................................................................... 46
25.2. Totalizing Operation ............................................................................................................................ 46
26. WORKING MODE – ANIMAL WEIGHING................................................................................................. 47
26.1. Local Settings...................................................................................................................................... 48
26.2. Animal Weighing Operation................................................................................................................. 48
27. IMPORT / EXPORT....................................................................................................................................48
27.1. Weighing Records Export.................................................................................................................... 49
27.2. ALIBI Weighings Export ...................................................................................................................... 49
27.3. Parameters Export / Import ................................................................................................................. 49
28. INPUTS / OUTPUTS.................................................................................................................................. 50
28.1. Inputs / Outputs Parameters................................................................................................................ 50
28.2. Inputs Setup........................................................................................................................................ 50
28.3. Outputs Setup ..................................................................................................................................... 51
29. DIAGRAMS OF CONNECTION CABLES .................................................................................................52
30. TROUBLESHOOTING...............................................................................................................................53
31. ERROR MESSAGES.................................................................................................................................53

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1.GENERAL INFORMATION
WLC/A1, WLC/A2 precision scales enable fast and accurate mass
measurements under laboratory and industrial conditions. The devices are
equipped with an internal battery which allows their operation in places where
there is no access to the mains. The WLC series features a stainless steel
weighing pan, and a backlit LCD guaranteeing clear weighing result
presentation.
WLC/A1, WLC/A2 precision scales are equipped with the following interfaces:
2 x RS232, USB type A, and USB type B. The interfaces enable cooperation
between the scale and peripheral devices (e.g. printer, computer, USB flash
drive).
2.PRECAUTIONS
2.1. Operation
A. Prior the first use, carefully read this User Manual. Use the device only
as intended.
B. Indicators to be decommissioned must be decommissioned in accordance
with valid legal regulations.
2.2. Battery Power Supply
WLC/A1, WLC/A2 series scales are devices intended to be supplied by SLA
battery (sealed lead acid) of 3- 4 Ah capacity.
Do not let battery discharge in case of prolonged storage
of the device in low temperature.
Accumulators do not belong to regular household waste.
The European legislation requires discharged accumulators
to be collected and disposed separately from other
communal waste with the aim of being recycled. Dear user,
you are obliged to dispose of the worn out batteries as
regulated.
Notice: Symbols on batteries identify harmful compounds:
Pb = lead, Cd = cadmium, Hg = mercury.
A worn out battery can be replaced only by the manufacturer
or by the authorized service.

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2.3. Operation under Conditions Difficult due to Electrostatics
If the device is to be operated in a place characterized with conditions that are
difficult due to electrostatics (e.g. printing house, packing centre, etc.),
you must connect it to the earth wire. To enable this, the device features
functional earthing terminal, marked with symbol.
3.WARRANTY CONDITIONS
A. RADWAG feels obliged to repair or exchange all elements that appear
to be faulty by production or by construction.
B. Defining defects of unclear origin and means of their elimination can only
be realized with assistance of manufacturer and user representatives.
C. RADWAG does not bear any responsibility for damage or losses
resulting from unauthorized or inadequate performing of production
or service processes.
D. The warranty does not cover:
•mechanical damage caused by product exploitation other than
intended, damage of thermal and chemical origin, damage caused by
lightning, overvoltage in the power network or other random event,
•inappropriate cleaning habits.
E. Loss of warranty takes place if:
•a repair is carried out outside RADWAG authorized service point,
•service claims intrusion into mechanical or electronic construction
by unauthorized people,
•the device does not bear company security stickers.
F. Warranty conditions outline the warranty period for rechargeable
batteries attached to the device for 12 months.
G. For detailed warranty conditions read the warranty certificate.
H. Contact with the central authorized service: [phone] ext. 106
and 107.

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4. DESIGN
4.1. Dimensions
Figure 1a. WLC/A1 precision scale
Figure 1b. WLC/A2 precision scale

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4.2. Connectors Arrangement
Figure 2. Connectors view
1- power supply socket 12 VDC
2- RS232 (1) connector
3- RS232 (2) connector
4- USB A "host"
5- USB B "device"
4.3. Pins Overview
Pin2 – RxD
Pin3 – TxD
Pin4 – 5 VDC
Pin5 – GND
RS232 (1) connector
DB9/M (male)
Pin1 - GNDWE
Pin2 - OUT1
Pin3 - OUT2
Pin4 - COMM
Pin6 - IN4
Pin7 - IN3
Pin8 - TxD2
Pin9 - 5 VDC
Pin10 - GNDRS
Pin11 - IN2
Pin12 - IN1
Pin13 - RxD2
Pin14 - OUT4
Pin15 - OUT3
IN/OUT, RS232 (2) connector
DSUB15/F (female)

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5.UNPACKING AND INSTALLATION
•Unpack the device and place it on a flat and even surface. Keep it far
away from any sources of heat.
•Install the weighing pan, follow the below figures:
WLC/A1 precision scale WLC/A2 precision scale
5.1. Under-Pan Weighing
The WLC/A1, WLC/A2 scales enable weighing loads below scale (so called
under-pan weighing). This is an alternative for loads of non-standard
dimensions and shapes, and for loads generating magnetic field.
Preparing the scale for the under-pan weighing:
1. Unpack the scale, assembly it
following section 5 of this user
manual.
-
2. Put the scale right side down.

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3. Remove the hole plug.
4. Mount the hook and put the
scale bottom side down.
6.START-UP AND OPERATION
6.1. Levelling
To level the weighing instrument turn its feet. Keep turning the feet until the air
bubble takes central position:
6.2. Connecting the Scale to the Mains
The weighing device can be connected to the mains only with a power supply
that comes standard with the particular model.

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Nominal voltage of the power supply (specified on the power supply data plate)
has to be compatible with the mains nominal voltage.
Procedure:
•Connect the power supply to the mains. Plug it to the power supply socket
(back side of the scale housing).
•Press key. The key is also used to switch the scale on/off.
•Display test proceeds (all symbols are backlit for a moment), program
name and number is displayed first, ZERO indication with reading unit
next (displayed reading unit is conditioned by scale type).
•In case the weighing result is not zero after indication stabilisation, press
key.
6.3. Warm-Up Time
•For correct scale operation, the workroom temperature must range
between +15°C ÷+30°C.
•It takes 30 minutes for the device to warm up.
•During the thermal stabilization, the indications on the screen can change.
•If you want to carry out adjustment operation, make sure that your device
is thermally stable.
•Temperature and humidity variations during operation may cause
indication errors. To remove the indication errors perform user adjustment.
6.4. Battery Charge Status
The scale of standard design is equipped with an internal battery. Battery state
is signalled by pictogram, the pictogram is displayed in the top bar of the
display.
pictogram display mode Meaning
No pictogram Battery charged. Regular scale operation.
Pictogram displayed continuously Too low battery charge (the scale is about to shut
down). Charge the battery immediately.
Blinking pictogram, blink frequency:
ca. 1 s
Battery charge in progress. The device is connected
to the power supply charging the battery.
Blinking pictogram, blink frequency:
ca. 0.5 s Battery error. Battery is damaged.

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6.5. Battery Charge Status Check
•Press and keys combination.
•Battery charge state, given in %, is displayed for 2 s.
•Next, home screen is displayed automatically.
7.MAINTENANCE ACTIVITIES
In order to ensure safety in the course of cleaning, it is necessary to disconnect
the device from the mains. With this condition met, uninstall the weighing pan
and other detachable components.
Cleaning the weighing pan while still installed may cause
damage of the measuring system.
7.1. Cleaning ABS Components
To clean dry surfaces and avoid smudging, use clean non-colouring cloths
made of cellulose or cotton. You can use a solution of water and detergent
(soap, dishwashing detergent, glass cleaner). Gently rub the cleaned surface
and let it dry. Repeat cleaning process if needed.
In the case of hard to remove contamination, e.g. residues of adhesive, rubber,
resin, polyurethane foam etc., you can use a special cleaning agents based on
a mixture of aliphatic hydrocarbons that do not dissolve plastics. Before using
the cleanser for all surfaces we recommend carrying out tests. Do not use
cleansers containing abrasive substances.
7.2. Cleaning Glass Components
Select dissolvent depending on a dirt. Never soak the glass panes in alkaline
solutions since they interact with glass and may cause damage. Do not use
cleansers containing abrasive substances.
For organic dirt use acetone first, next use water or detergent. For other than
organic dirt use diluted acid solutions (soluble salts of hydrochloric or nitric
acid) or base solutions (ammonium or sodium base). To remove ACIDS use
protophilic solvent (sodium carbonate), to remove BASE use protogenic solvent
(mineral acid of various concentration).
In case of heavy contamination use brush and detergent, nevertheless avoid
detergents containing large and hard molecules which could potentially scratch
glass panes.

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At the end of the cleaning process rinse the pane using distilled water. Use soft
brush with wooden or plastic handle exclusively in order to avoid risk
of scratches. Do not use wire brush. Rinsing is a necessary cleaning process
stage allowing to remove remaining soap, detergents and other cleansers from
the panes prior their reinstallation. After preliminary cleaning process stage,
rinse the pane using running water first, distilled next.
Avoid drying the panes either using paper towel or forced air circulation since
some fibres, grains or contamination of other type could permeate into the
panes thus causing weighing errors. We do not recommend using driers when
drying measuring glass tools. It is a frequent treatment to leave glass
components on a rack to dry.
7.3. Cleaning Stainless Steel Components
Avoid using cleansers containing any corrosive chemicals, e.g. bleach
(including chlorine). Do not use cleansers containing abrasive substances.
Always remove the dirt using microfiber cloth to avoid damage of protective
coating.
In case of a daily maintenance:
1. Remove the dirt using cloth dipped in warm water.
2. For best results, add a little bit of dishwashing detergent.
7.4. Cleaning Powder-Coated Components
For preliminary cleaning process stage you need running water or wet sponge
featuring large holes, this will help you to remove loose, heavy dirt. Do not use
cleansers containing abrasive substances.
Next, using cloth and cleanser-water solution (soap, dishwashing liquid) gently
rub the cleaned surface.
Avoid using cleanser without water since it may result with damage of the
cleaned surface, please mind that large amount of water mixed with cleanser
is a must.
7.5. Cleaning Aluminium Components
While cleaning aluminium components use products acid by nature, e.g. spirit
vinegar, lemon. Do not use cleansers containing abrasive substances. Avoid
using hard brush, this may cause scratches. It is recommended to use
microfibre cloth.
While polishing the surface use circular movements. Use clean, dry cloth
to make the surface shine.

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8.OPERATION PANEL
Operation panel of WLC/A2 precision scale
Operation panel of WLC/A1/C/2, WLC/A2/C/2 precision scales
9.KEYS
Press to switch the weighing device on/off – hold the key for about
1 second.
Function key, press to change the working mode.
Press to send the weighing result to a printer or computer.
Press to zero the scale.

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Press to tare the scale.
Press to perform internal adjustment manually (WLC/A1/C/2,
WLC/A2/C/2 scales).
Upon pressing + keys combination, functions
of given keys change. Detailed information concerning use
of + keys combination is to be found further down
this manual.
10. PROGRAM STRUCTURE
Program menu is divided into function groups. Function group is a group
of interrelated parameters.
10.1. Function Groups
Function group
number Function group name Description
P1 CAL User adjustment
P2 rEAd Readout parameters
P3 Func Working modes
P4 Conn Communication
P5 ducE Peripheral devices
P6 Prnt Printouts
P7 Othr Operation-related functions
P8 InFo Scale data
P9 Unit Units
IO - Inputs / Outputs
IE - Import / Export

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10.2. Operating the Menu
In order to navigate the program menu use the operation panel.
+ Press to enter the main menu.
+
Press to:
•enter tare manually.
•enter tare from tare database,
•change value by 1 digit up,
•scroll the menu up.
+ Press to check battery/accumulator state.
+ Press to view date/time.
Press to:
•scroll the menu down,
•change current parameter value.
Press to:
•enter given submenu,
•modify given parameter.
Press to confirm modification.
Press to:
•exit, function remains unmodified,
•move one menu level up.
10.3. Return to the Weighing Mode
Introduced menu modifications are automatically saved to scale memory upon
return to the home screen. To return to the home screen press key
repeatedly.
11. WEIGHING OPERATION
Load the weighing pan. Read the result when stability marker is displayed.
Only stable weighing results can be recorded (stability
marker ).

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11.1. Good Weighing Practice
To assure long-term operation and correct mass measurements, follow the
rules presented below:
Load the weighing pan steadily
avoiding mechanical shocks.
Place weighed loads centrally on the
weighing pan (eccentricity errors are
specified by EN 45501 standard, point
3.6.2.).
Do not apply concentrated force (total
load in one point).
Avoid side loading, in particular side
shocks.
11.2. Zeroing
To zero mass indication press key. Zero indication and the following
pictograms are displayed: and . The instrument can be zeroed only
when the indication is stable.
Indication can be zeroed only within ±2% range of maximum
capacity. If the zeroed value is greater than ±2% of the
maximum capacity, then the software displays message
<Err2>, and short sound signal is heard.

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11.3. Taring
To determine net weight value, load the weighing pan with a packaging, wait
for a stable indication and press key. Zero indication and the following
pictograms are displayed: Net and . The weighing device has been tared.
Upon loading, net mass is displayed.
Taring can be carried out repeatedly within the whole weighing range.
Remember not to exceed the maximum capacity, i.e. sum of tare weight value
and load weight value must be lower than the maximum capacity value. Upon
unloading the weighing pan, the sum of tared masses with minus sign
is displayed.
It is impossible to tare zero or negative values. When you
tare zero or negative values, message <Err3> is displayed,
short sound signal is heard.
11.4. Entering Tare Value Manually
•Press and keys combination, tare value edit box is displayed.
•Enter tare value, to do it press and keys:
Press to select digit that is to be edited.
Press to set digit value, 0 - 9 .
•Press key to confirm, the scale returns to the weighing mode,
modified tare value with '–' sign is displayed.
•You can enter tare value at any time during the weighing operation.
11.5. Dual Range Devices
N/A in case of single range scales
Switching from weighing with the accuracy of the I weighing range to weighing
with the accuracy of the II weighing range takes place automatically upon
exceeding Max of the I weighing range. Upon switching to weighing with the
accuracy of the II weighing range, respective pictogram/marker
is displayed in the top left hand corner.

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To return to weighing with accuracy of the I weighing range:
•Take the load off the weighing pan.
•As the indication returns to zero and when symbols and are
displayed, press button.
•II weighing range pictogram/marker gets blank, the scale returns
to weighings with the accuracy of the I weighing range.
11.6. Units
<P9.Unit> parameter group enables change of start unit and temporary unit.
Unit change can be performed in the course of weighing or during operation
of other modes. 'Parts counting' and 'Percent weighing' modes are exceptions.
11.6.1. Start Unit
Parameter for setting unit that is displayed and used after device start-up.
Procedure:
•Enter <P9.Unit / 9.1.UnSt> submenu.
•Press key, available units are displayed successively one by one.
Options in case when the main unit is [kg]:
•kg (kilogram),
•g (gram),
•lb (pound)*,
•N (Newton).
*) –unit disabled for verified weighing devices.
Options in case when the main unit is [g]:
•g (gram),
•kg (kilogram),
•ct (carat),
•lb (pound)*.
*) –unit disabled for verified weighing devices.
•Select start unit and press key, next go back to the home screen,
to do it press key.
•Upon next start-up the scale runs with set start unit.

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11.6.2. Temporary Unit
Temporary unit runs from the moment it is set to the scale shut-down and
restart.
Procedure:
•Enter <P9.Unit / 9.2.Unin> submenu.
•Press key, available units are displayed successively one by one.
Options in case when the main unit is [kg]:
•kg (kilogram),
•g (gram),
•lb (pound)*,
•N (Newton).
*) –unit disabled for verified weighing devices.
Options in case when the main unit is [g]:
•g (gram),
•kg (kilogram),
•ct (carat),
•lb (pound)*.
*) –unit disabled for verified weighing devices.
•Select temporary unit and press key, next go back to the home
screen.
12. ADJUSTMENT
In order to ensure the highest weighing accuracy, it is recommended
to periodically introduce corrective factor of indications to scale memory,
the said factor must be referred to a reference weight. This is so called
adjustment. Adjustment has to be carried out:
•prior weighing,
•if long breaks between successive measuring series occur,
•if the ambient temperature has changed dynamically,
•if the scale has been relocated.