LAUMAS TLB User manual

ENGLISH ENGLISH ENGLISH ENGLISH
Installation and User Manual
version 1.16
TLB

SYMBOLS
Here are the symbols used in the manual to draw the reader's attention:
Caution! Risk of electric shock.
Caution! This operation must be performed by skilled personnel.
Pay particular attention to the following instructions.
Further information.
WARRANTY
24 months from the date of the delivery note. Warranty covers only failures of defective components (due to construction
defects or defects in materials) and includes replacement or repair of the components and related labor costs.
Warranty is automatically forfeited in the event of:
- tampering, deletion, removal of the identification label and/or serial number of the product
- misuse, transformation, alteration, repair of products not carried out by Laumas personnel
Laumas provides a 1-year warranty from the date of the delivery note on defects in material or manufacture of the battery.
GUIDELINES FOR PROPER DISPOSAL
This symbol on the product or packaging indicates that:
-This is electrical/electronic equipment and cannot be disposed of as municipal solid waste, but must be delivered
to a recycling center
-Improper use or disposal can pollute the environment or damage human health
-Non-compliance with these guidelines will be penalized in accordance with the regulations in force in the country
of destination
-It is recommended to dispose of the packing and packaging as required by local regulations

TABLE OF CONTENTS
USER WARNINGS ................................................................................................................... 1
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS . 1
RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS................ 2
LOAD CELL INPUT TEST (QUICK ACCESS) .......................................................................... 4
LOAD CELL TESTING............................................................................................................... 4
MAIN SPECIFICATIONS OF THE INSTRUMENT................................................................... 5
TECHNICAL SPECIFICATIONS .............................................................................................. 6
ELECTRICAL CONNECTIONS................................................................................................ 7
BASIC INFORMATION............................................................................................................... 7
WIRING DIAGRAM..................................................................................................................... 8
TLB –TLB485 –TLBPROFI............................................................................................................... 8
TLB (other models) ............................................................................................................................ 9
LED AND KEYS FUNCTIONS ............................................................................................... 10
MENU MAP ............................................................................................................................ 11
SETPOINT ................................................................................................................................ 11
SYSTEM PARAMETERS ......................................................................................................... 11
INSTRUMENT COMMISSIONING.......................................................................................... 12
PROGRAMMING OF SYSTEM PARAMETERS.................................................................... 13
THEORETICAL CALIBRATION............................................................................................... 13
MAXIMUM CAPACITY...................................................................................................................... 14
TARE WEIGHT ZERO SETTING ...................................................................................................... 14
ZERO VALUE MANUAL ENTRY...................................................................................................... 14
REAL CALIBRATION (WITH SAMPLE WEIGHTS) ................................................................ 15
FILTER ON THE WEIGHT ....................................................................................................... 16
ANTI PEAK........................................................................................................................................ 16
ZERO PARAMETERS.............................................................................................................. 17
RESETTABLE WEIGHT SETTING FOR SMALL WEIGHT CHANGES.......................................... 17
AUTOMATIC ZERO SETTING AT POWER-ON .............................................................................. 17
ZERO TRACKING ............................................................................................................................. 17
SETTING UNITS OF MEASURE.............................................................................................. 18
DISPLAY COEFFICIENT .................................................................................................................. 18
OUTPUTS AND INPUTS CONFIGURATION .......................................................................... 20
SEMI-AUTOMATIC TARE (NET/GROSS) ............................................................................... 21
PRESET TARE (SUBTRACTIVE TARE DEVICE)................................................................... 22
SEMI-AUTOMATIC ZERO (WEIGHT ZERO-SETTING FOR SMALL VARIATIONS) ............ 23
PEAK ........................................................................................................................................ 23
ANALOG OUTPUT (TLB ONLY) ............................................................................................. 24
SERIAL COMMUNICATION SETTING.................................................................................... 26
RS485 SERIAL COMMUNICATION ................................................................................................. 27
DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER ...................... 28
TEST......................................................................................................................................... 28

INFO MENU.............................................................................................................................. 28
SETPOINT PROGRAMMING................................................................................................. 29
ALARMS................................................................................................................................. 30
RESERVED FOR THE INSTALLER ...................................................................................... 31
MENU LOCKING...................................................................................................................... 31
MENU UNLOCKING................................................................................................................. 31
TEMPORARY MENU UNLOCKING......................................................................................... 31
DATA DELETION AND PROGRAM SELECTION................................................................... 31
KEYPAD OR DISPLAY LOCKING .......................................................................................... 32
DECLARATION OF CONFORMITY - EU............................................................................... 33
DECLARATION OF CONFORMITY - UKCA ......................................................................... 34

- 1 -
USER WARNINGS
RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT
-Keep away from heat sources and direct sunlight
-Repair the instrument from rain (except special IP versions)
-Do not wash with water jets (except special IP versions)
-Do not dip in water
-Do not spill liquid on the instrument
-Do not use solvents to clean the instrument
-Do not install in areas subject to explosion hazard (except special Atex versions)
-If the working temperature reaches the permitted limits, it is advisable to distance the instruments
to ensure adequate air flow and avoid malfunctions (e.g.: sudden shutdowns or disconnections)
RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING INSTRUMENTS
The terminals indicated on the instrument’s wiring diagram to be connected to earth must have
the same potential as the weighed structure (same earthing pit or earthing system). If you are
unable to ensure this condition, connect with an earthing wire the terminals of the instrument
(including the terminal –SUPPLY) to the weighed structure.
The cell cable must be individually led to its panel input and not share a conduit with other cables;
connect it directly to the instrument terminal strip without breaking its route with support terminal strips.
Use “RC” filters on the instrument-driven solenoid valve and remote control switch coils.
Avoid inverters in the instrument panel; if inevitable, use special filters for the inverters and separate
them with sheet metal partitions.
The panel installer must provide electric protections for the instruments (fuses, door lock switch etc.).
It is advisable to leave the equipment always switched on to prevent the formation of condensation.
MAXIMUM CABLE LENGTHS
-RS485: 1000 metres with AWG24, shielded and twisted cables
-Analog current output: up to 500 metres with 0.5 mm2 cable
-Analog voltage output: up to 300 metres with 0.5 mm2cable

- 2 -
RECOMMENDATIONS FOR CORRECT INSTALLATION OF THE LOAD CELLS
SIZING OF LOAD CELLS CAPACITY
For safety reasons, in case of static weighing, it is advisable to use the load cells at a maximum of 70-
80% of its nominal capacity (assuming that the load is uniformly distributed over the entire weighed
structure); depending on the handling mode of the load to weigh, consider to further reduce the % of
load with respect to the nominal capacity (ex.: forklifts handling, bridge cranes, etc.).
In case of weighing with dynamic loads, the installer has to estimate the thrust speed, the acceleration,
the frequency, etc.
INSTALLING LOAD CELLS
The load cells must be placed on rigid, stable in-line structures; it is important to use the mounting
modules for load cells to compensate for misalignment of the support surfaces.
CONNECTING SEVERAL CELLS IN PARALLEL
Connect several cells in parallel by using - if necessary - a watertight junction box with terminal box.
The cell connection extension cables must be shielded, led individually into their piping or conduit and
laid as far as possible from the power cables (in case of 4-wire connections, use cables with 4x1 mm2
minimum cross-section).
PROTECTION OF THE CELL CABLE
Use water-proof sheaths and joints in order to protect the cables of the cells.
MECHANICAL RESTRAINTS (pipes, etc.)
When pipes are present, we recommend the use of hoses and flexible couplings with open mouthpieces
with rubber protection; in case of hard pipes, place the pipe support or anchor bracket as far as possible
from the weighed structure (at a distance at least 40 times the diameter of the pipe).
WELDING
Avoid welding with the load cells already installed. If this cannot be avoided, place the welder ground
clamp close to the required welding point to prevent sending current through the load cell body.
WINDY CONDITIONS - KNOCKS –VIBRATIONS
The use of weigh modules is strongly recommended for all load cells to compensate for misalignment
of the support surfaces. The system designer must ensure that the plant is protected against lateral
shifting and tipping relating to: shocks and vibration; windy conditions; seismic conditions in the
installation setting; stability of the support structure.

- 3 -
EARTHING THE WEIGHED STRUCTURE
By means of a copper wire with suitable cross-section, connect the cell upper support plate with the
lower support plate, then connect all the lower plates to a single earthing system. Electrostatic charges
accumulated because of the product rubbing against the pipes and the weighed container walls are
discharged to the ground without going through or damaging the load cells. Failure to implement a
proper earthing system might not affect the operation of the weighing system; this, however, does not
rule out the possibility that the cells and connected instrument may become damaged in the future. It
is forbidden to ensure earthing system continuity by using metal parts contained in the weighed
structure.
FAILURE TO FOLLOW THE INSTALLATION RECOMMENDATIONS WILL BE CONSIDERED
A MISUSE OF THE EQUIPMENT

- 4 -
LOAD CELL INPUT TEST (QUICK ACCESS)
From the weight display, press for 3 seconds: the display shows the response signal of the load
cells expressed in mV with four decimals.
Example: a load cell with 2.000 mV/V sensitivity provides a response signal between 0 and 10 mV.
LOAD CELL TESTING
Load cell resistance measurement (use a digital multimeter):
-Turn off the instrument.
-Disconnect the load cells from the instrument and check that there is no moisture in the cell junction
box caused by condensation or water infiltration. If so, drain the system or replace it if necessary.
-The value between the positive signal wire and the negative signal wire must be equal or similar
to the one indicated in the load cell data sheet (output resistance).
-The value between the positive excitation wire and the negative excitation wire must be equal or
similar to the one indicated in the load cell data sheet (input resistance).
-The insulation value between the shield and any other cell wire and between any other cell wire
and the body of the load cell must be higher than 20 Mohm.
Load cell voltage measurement (use a digital multimeter):
-Turn on the instrument.
-Take out the load cell to be tested from underneath the container, or alternatively, lift the container
support.
-Make sure that the excitation of two wires of the load cell connected to the instrument (or amplifier)
is 5 VDC ±3%.
-Measure the response signal between the positive and the negative signal wires by directly
connecting them to the tester, and make sure that it is comprised between 0 and ±0.5 mV.
-Apply load to the cell and make sure that there is a signal increment.
IF ONE OF THE ABOVE CONDITIONS IS NOT MET, PLEASE CONTACT THE TECHNICAL
ASSISTANCE SERVICE.


3 s

- 5 -
MAIN SPECIFICATIONS OF THE INSTRUMENT
Weight transmitter with 6-wire load cells input suitable for assembly on back panel fitted Omega/DIN
rail. Dimensions: 25x115x120 mm. Six-digit semi-alphanumeric display, 8 mm height, 7 segment.
Four-key keyboard.
RS485 serial port for connection to: PC/PLC up to 32 instruments (max 99 with line repeaters) by
ASCII Laumas or ModBus R.T.U. protocol, remote display.
Optional: integrated CANopen, DeviceNet, CC-Link, PROFIBUS DP, Modbus/TCP, Ethernet TCP/IP,
Ethernet/IP, PROFINET IO, EtherCAT, POWERLINK, SERCOS III output.
TLB only: optoisolated 16 bit analog output (tension or current).

- 6 -
TECHNICAL SPECIFICATIONS
POWER SUPPLY and CONSUMPTION
12/24 VDC ±10%; 5 W
No. OF LOAD CELLS IN PARALLEL and SUPPLY
max 8 (350 ohm); 5 VDC / 120 mA
LINEARITY
< 0.01% F.S.
ANALOG OUTPUT LINEARITY (TLB only)
< 0.01% F.S.
THERMAL DRIFT
< 0.0005% F.S./°C
ANALOG OUTPUT THERMAL DRIFT (TLB only)
< 0.003 % F.S./°C
A/D CONVERTER
24 bit (16000000 points)
DIVISIONS
(with measurement range ±10 mV = sens. 2 mV/V)
±999999
MEASUREMENT RANGE
±39 mV
MAX SENSITIVITY OF USABLE LOAD CELLS
±7 mV/V
MAX CONVERSIONS PER SECOND
300 conversions/second
DISPLAY RANGE
±999999
NO. OF DECIMALS / DISPLAY INCREMENTS
0÷4 / x 1 x 2 x 5 x 10 x 20 x 50 x 100
DIGITAL FILTER / READINGS PER SECOND
10 levels / 5÷300 Hz
RELAY OUTPUTS
N. 3 - max 115 VAC; 150 mA
DIGITAL INPUTS
N. 2 - optoisolated 5 - 24 VDC PNP
SERIAL PORTS
RS485
BAUD RATE
2400, 4800, 9600, 19200, 38400, 115200
HUMIDITY (non condensing)
85%
STORAGE TEMPERATURE
-30°C +80°C
WORKING TEMPERATURE
-20°C +60°C
OPTOISOLATED ANALOG OUTPUT (TLB only)
16 bit - 65535 divisions
0÷20 mA; 4÷20 mA (max 300 ohm);
0÷10 V; 0÷5 V, ±10 V; ±5 V (min 10 kohm)
RELAY OUTPUTS
N. 3 - max 30 VAC, 60 VDC; 150 mA
WORKING TEMPERATURE
-20 °C +60 °C
Equipment to be powered by 12-24 VDC LPS or Class 2 power source.

- 7 -
ELECTRICAL CONNECTIONS
BASIC INFORMATION
-It is recommended that the power supply negative pole be grounded.
-It is possible to supply up to 8 350 ohm load cells, or 16 700 ohm load cells.
-For 4-wire load cells, make a jumper between EX- and REF- and between EX+ and REF+.
-Connect terminal “–SUPPLY” to the RS485 common of the connected instruments in the event
that these receive alternating current input or that they have an optically isolated RS485.
-In case of an RS485 network with several devices it is recommended to activate the 120 ohm
termination resistance on the two devices located at the ends of the network, as described in the
paragraph RS485 SERIAL CONNECTION.

- 8 -
WIRING DIAGRAM
TLB –TLB485 –TLBPROFI
3 outputs: controlled by setpoint values or by remote device via protocol.
2 inputs (default: input 1= SEMI-AUTOMATIC ZERO; input 2= NET/GROSS): settable to have the
following functions: SEMI-AUTOMATIC ZERO, NET/GROSS, PEAK or REMOTE CONTROL (see
section OUTPUTS AND INPUTS CONFIGURATION).
TERMINALS LEGEND
1
-LOAD CELL EXCITATION (-EX)
11
+ANALOG OUTPUT 0÷10 V
(TLB only)
2
+LOAD CELL EXCITATION (+EX)
12
-ANALOG OUTPUT COMMON
(TLB only)
3
+LOAD CELL REF/SENSE
13
OUTPUT No. 1
4
-LOAD CELL REF/SENSE
14
OUTPUT No. 2
5
-LOAD CELL SIGNAL
15
OUTPUT No. 3
6
+LOAD CELL SIGNAL
16
OUTPUT COMMON
7
INPUT No. 1 (+VDC min 5 V max 24 V)
17
RS485: +
8
INPUT No. 2 (+VDC min 5 V max 24 V)
18
RS485: -
9
INPUT COMMON (-VDC 0 V)
19
+SUPPLY (12/24 VDC)
10
+ANALOG OUTPUT 0÷20 or 4÷20 mA
(TLB only)
20
-SUPPLY (12/24 VDC)
RS485: SHIELD, GND
LOAD CELL
13 14 15 16 17 18 19 20
1 2 34 7 8 9
IN 1
IN 2
IN COMMON
12/24 VDC
SUPPLY
+
-
INPUTS
supply 5÷24 VDC
OUTPUTS
max 115 VAC 150 mA
10 11 12
+ 0÷20 - 4÷20 mA
+ 0÷10 VDC
ANALOG
OUTPUT
- COMMON
TLB ONLY
RS485
65
+SIG
-SIG
-REF
+REF
+EX
-EX
SH OUT 1
OUT 2 OUT 3 OUT COMMON
+RS485
-RS485
+12/24 VDC
0 VDC
1 2 3465
+SIG
-SIG
+EX
-EX
4-WIRE LOAD CELL

- 9 -
TLB (other models)
3 outputs: controlled by setpoint values or by remote device via protocol.
2 inputs (default: input 1= SEMI-AUTOMATIC ZERO; input 2= NET/GROSS): settable to have the
following functions: SEMI-AUTOMATIC ZERO, NET/GROSS, PEAK or REMOTE CONTROL (see
section OUTPUTS AND INPUTS CONFIGURATION).
TERMINALS LEGEND
1
-LOAD CELL EXCITATION (-EX)
15
OUTPUT No. 1
2
+LOAD CELL EXCITATION (+EX)
16
OUTPUT No. 2
3
+LOAD CELL REF/SENSE
17
OUTPUT No. 3
4
-LOAD CELL REF/SENSE
18
OUTPUT COMMON
5
-LOAD CELL SIGNAL
19
RS485: +
6
+LOAD CELL SIGNAL
20
RS485: -
7
INPUT No. 1 (+VDC min 5 V max 24 V)
21
+SUPPLY (12/24 VDC)
8
INPUT No. 2 (+VDC min 5 V max 24 V)
22
-SUPPLY (12/24 VDC)
RS485: SHIELD, GND
9
INPUT COMMON (-VDC 0 V)
LOAD CELL
15 16 17 18 19 20
1 2 34 7 8 9
IN 1
IN 2
IN COMMON
12/24 VDC
SUPPLY
+
-
INPUTS
supply 5÷24 VDC
OUTPUTS
max 115 VAC 150 mA RS485
6
5
+SIG
-SIG
-REF
+REF
+EX
-EX
SH OUT 1
OUT 2 OUT 3 OUT COMMON
+RS485
-RS485
+12/24 VDC
0 VDC
1 2 346
5
+SIG
-SIG
+EX
-EX
4-WIRE LOAD CELL
21 22

- 10 -
LED AND KEYS FUNCTIONS
LED
Main function
Secondary function *
NET
net weight (semi-automatic tare or preset tare)
LED lit: output 3 closed
zero (deviation from zero not more than ±0.25 divisions)
LED lit: output 2 closed
stability
LED lit: output 1 closed
kg
unit of measure: kg
g
unit of measure: g
LED lit: input 2 closed
L
unit of measure other than kg or g
LED lit: input 1 closed
*) To activate the secondary LED function, during weight display press and hold down the keys
and (press immediately followed by ).
KEY
Short press
Long press (3 s)
Into menus
Semi-automatic zero
Tare resetting
Cancel or return to previous
menu
Gross Net
Net Gross
Select figure to be modified
or go to previous menu item.
Gross weight:
mV load cell test
Net weight:
temporarily display
the gross weight
Modify selected figure or go
to next menu item
Setting setpoint and hysteresis
Confirm or enter in
submenu
+
Setting general parameters
(press immediately followed
by )
+
Setting preset tare (press
immediately followed by )
Into menus LEDs light up in sequence to indicate that it is not displaying a weight.
0

- 11 -
MENU MAP
Into menus changes are applied right after pressing the key (no further confirmation is required).
SETPOINT
SYSTEM PARAMETERS

 
 
…


…









+


 

 
 
 
 
 

 





 




3 s

 




 
 
 
 
 






+


3 s




TLB only


- 12 -
INSTRUMENT COMMISSIONING
Upon switch-on, the display shows in sequence:
- → (ONLY in case of approved program);
-instrument model (e.g.: );
- followed by the software code (e.g.:  );
-program type:  (base);
-followed by the software version (e.g.:  );
- followed by the hardware code (e.g.:  );
-serial number (e.g.: );
Check that the display shows the weight and that when loading the load cells there is an increase in
weight. If there is not check and verify the connections and correct positioning of the load cells.
-If the instrument has already been theoretical CALIBRATED (plant system identification tag
present on the instrument and on the cover: load cell’s rated data already entered):
▫Reset to zero (see section TARE WEIGHT ZERO SETTING).
▫Check the calibration with sample weights and correct the indicated weight if necessary (see
section REAL CALIBRATION (WITH SAMPLE WEIGHTS)).
-If the instrument HAS NOT BEEN CALIBRATED (missing plant system identification tag)
proceed with calibration:
▫If load cells data are unknown, follow the procedure in section REAL CALIBRATION (WITH
SAMPLE WEIGHTS).
▫Enter the rated data of load cells following the procedure given in section THEORETICAL
CALIBRATION.
▫Reset to zero (see section TARE WEIGHT ZERO SETTING).
▫Check the calibration with sample weights and correct the indicated weight if necessary (see
section REAL CALIBRATION (WITH SAMPLE WEIGHTS)).
-If you use the analog output, set the desired analog output type and the full scale value (see
section ANALOG OUTPUT).
-If you use serial communication, set the related parameters (see section SERIAL
COMMUNICATION SETTING).
-If setpoint are used, set the required weight values and the relevant parameters (see sections
SETPOINT PROGRAMMING and OUTPUTS AND INPUTS CONFIGURATION).

- 13 -
PROGRAMMING OF SYSTEM PARAMETERS
From the weight display, press simultaneously keys and to access the parameter setting.
: to enter a menu/confirm the data entry.
: to modify the displayed figure or menu item.
: to select a new figure or modify the displayed menu item.
: to cancel and return to the previous menu.
THEORETICAL CALIBRATION
This function allows the load cell rated values to be set.
To perform the theoretical calibration set the following parameters in sequence:
- (default: ): the system full scale is given by one cell capacity multiplied by the
number of cells used. Example: 4 cells of 1000 kg FULL SCALE = 1000 x 4 = 4000.
The instrument is supplied with a theoretical full scale value  corresponding to 10000. To
restore factory values, set 0 as full scale.
- (default: 2.00000 mV/V): sensitivity is a load cell rated parameter expressed in mV/V.
Set the average sensitivity value indicated on the load cells. It’s possible to set a value between
0.50000 and 7.00000 mV/V. Example of 4-cell system with sensitivity: 2.00100, 2.00150, 2.00200,
2.00250; enter 2.00175, calculated as (2.00100 + 2.00150 + 2.00200 + 2.00250) / 4.
-:the division (resolution) is the minimum weight increment value which can be displayed.
It is automatically calculated by the system according to the performed calibration, so that it is
equal to 1/10000 of full scale. It can be changed and be variable between 0.0001 and 100 with x1
x2 x5 x10 increments.
-By modifying the theoretical full scale or the sensitivity, the real calibration is cancelled
and the theoretical calibration only is considered valid.
-If the theoretical full scale and the recalculated full scale in real calibration (see section
REAL CALIBRATION (WITH SAMPLE WEIGHTS)) are equal, this means that the
calibration currently in use is theoretical; if they are different, the calibration in use is the
real calibration based on sample weights.
-By modifying the theoretical full scale or the sensitivity, the system’s parameters
containing a weight value will be set to default values (setpoint, hysteresis, etc.).

+





- 14 -
MAXIMUM CAPACITY
: maximum displayable weight (from 0 to full scale; default: 0). When the weight exceeds this
value by 9 divisions, the display shows . To disable this function, set 0.
TARE WEIGHT ZERO SETTING
This menu may also be accessed directly from the weight display, holding down the key
for 3 seconds.
Perform this procedure after having set the THEORETICAL CALIBRATION data.
Use this function to set to zero the weight of the empty system after commissioning and then later on
to compensate zero variations due to the presence of product residues.
Procedure:
-Confirm the message  by pressing .
-The weight value to be set to zero is displayed. In this phase all of the LEDs are flashing.
-Confirming once again, the weight is set to zero (the value is stored to the permanent memory).
-Press to display the value of the total weight reset by the instrument, given by the sum of all
of the previous zero settings.
ZERO VALUE MANUAL ENTRY
WARNING: Perform this procedure only if it’s not possible to reset the weighed structure tare, for
example because it contains product that cannot be unloaded.
Set in this parameter the estimated zero value (from 0 to 999999; default: 0).


+

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- 15 -
REAL CALIBRATION (WITH SAMPLE WEIGHTS)
After having performed the THEORETICAL CALIBRATION and TARE WEIGHT ZERO SETTING,
this function allows correct calibration to be done using sample weights of known value and, if
necessary, any deviations of the indicated value from the correct value to be corrected.
Load onto the weighing system a sample weight, which must be at least 50% of the maximum quantity
to be weighed.
By confirming the message  the flashing value of the weight currently on the system is
displayed. In this phase all of the LEDs are off. Adjust the value on display by using the arrow keys if
necessary. After confirming, the new set weight will appear with all the LEDs flashing. After an
additional confirmation, the message  will be restored and by repeatedly pressing the key
the weight will once again be displayed.
Example: for a system of maximum capacity 1000 kg and 1 kg division, two sample weights are
available, one of 500 kg and the other one of 300 kg. Load both weights onto the system and correct
the indicated weight to 800. Now remove the 300 kg weight, the system must show 500; remove the
500 kg weight too; the system must read zero. If this does not happen, it means that there is a
mechanical problem affecting the system linearity.
WARNING: identify and correct any mechanical problems before repeating the procedure.
-If theoretical full scale and recalculated full scale in real calibration are equal, it means that
the theoretical calibration is currently in use; otherwise, the real calibration based on
sample weights is in use.
-If the correction made changes the previous full scale for more than 20%, all the
parameters with settable weight values are reset to default values.
LINEARISATION OPTION ON MAX 8 POINTS:
It is possible to perform a linearisation of the weight repeating the above-described procedure
up to a maximum of eight points, using eight different sample weights. The procedure ends by
pressing the button or after entering the eighth value; at this point it will no longer be possible
to change the calibration value, but only to perform a new real calibration. To perform a new calibration,
should return to the weight display and then re-entering into the calibration menu.
By pressing after having confirmed the sample weight that has been set, the full scale appears,
recalculated according to the value of the maximum sample weight entered and making reference to
the cell sensitivity set in the theoretical calibration ().
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- 16 -
FILTER ON THE WEIGHT
Setting this parameter allows a stable weight display to be obtained.
To increase the effect (weight more stable) increase the value (from 0 to 9, default 4).
As seen in the diagram:
-By confirming the  message, the currently programmed filter value is displayed.
-By changing and confirming the value, the weight is displayed and it will be possible to
experimentally verify its stability.
-If stability is not satisfactory, confirming brings back the message  and the filter may be
modified again until an optimum result is achieved.
The filter enables to stabilise a weight as long as its variations are smaller than the corresponding
“response time”. It is necessary to set this filter according to the type of application and to the full scale
value set.
FILTER VALUE
Response times [ms]
Display and serial port
refresh frequency [Hz]
0
12
300
1
150
100
2
260
50
3
425
25
4 (default)
850
12.5
5
1700
12.5
6
2500
12.5
7
4000
10
8
6000
10
9
7000
5
ANTI PEAK
When the weight is stable, the anti peak filter removes any sudden disturbances with a maximum duration
of 1 second. Confirm the filter on the weight with and select one of the following options:
-: anti peak filter enabled (default);
-: anti peak filter disabled.
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