Interface INF1 Instruction Manual

Installation User Manual
User Manual

KEY TO SYMBOLS
Below are the symbols used in this manual to draw the reader's attention:
Warning! Risk of electrocution.
Warning! This operation must be performed by skilled workers.
Further information.
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TABLE OF CONTENTS
USER WARNINGS
RECOMMENDATIONS FOR INSTRUMENT INSTALLATION
RECOMMENDATIONS FOR LOAD CELL INSTALLATION
LOAD CELL INPUT TEST (QUICK ACCESS)
LOAD CELL TESTING
MAIN INSTRUMENT SPECIFICATIONS
TECHNICAL SPECIFICATIONS
ELECTRICAL CONNECTIONS
BASIC INFORMATION
WIRING DIAGRAM
INF1 - INF485
INF1 (other models)
LED AND KEYS FUNCTIONS
MENU MAP
SETPOINT
SYSTEM PARAMETERS
INSTRUMENT COMMISSIONING
PROGRAMMING OF SYSTEM PARAMETERS
THEORETICAL CALIBRATION
MAXIMUM CAPACITY
TARE WEIGHT ZERO SETTING
ZERO VALUE MANUAL ENTRY
REAL CALIBRATION (WITH SAMPLE WEIGHTS)
FILTER ON THE WEIGHT
ANTI PEAK
ZERO PARAMETERS
RESETTABLE WEIGHT SETTING FOR SMALL WEIGHT CHANGES
AUTOMATIC ZERO SETTING AT POWER-ON
ZERO TRACKING
SETTING UNITS OF MEASURE
DISPLAY COEFFICIENT
INPUT AND OUTPUT CONFIGURATION
SEMI-AUTOMATIC TARE (NET/GROSS)
PRESET TARE (SUBTRACTIVE TARE DEVICE)
SEMI-AUTOMATIC ZERO (ZERO-SETTING FOR SMALL VARIATIONS)
PEAK
ANALOG OUTPUT
SERIAL COMMUNICATION SETTING
RS485 SERIAL COMMUNICATION
DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER
TEST
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SETPOINT PROGRAMMING
ALARMS
COMMUNICATION PROTOCOLS
CONTINUOUS FAST WEIGHT TRANSMISSION PROTOCOL
ASCII BIDIRECTIONAL PROTOCOL
SETPOINT PROGRAMMING
SETPOINT STORAGE IN EEPROM MEMORY
READING WEIGHT, SETPOINT AND PEAK (IF PRESENT) FROM PC
SEMI-AUTOMATIC ZERO (ZERO-SETTING FOR SMALL VARIATIONS)
SWITCHING FROM GROSS TO NET WEIGHT
SWITCHING FROM NET TO GROSS WEIGHT
READING OF DECIMALS AND DIVISION NUMBER
TARE ZERO-SETTING
REAL CALIBRATION (WITH SAMPLE WEIGHT)
KEYPAD LOCK (BLOCK THE ACCESS TO THE INSTRUMENT)
KEYPAD UNLOCK
DISPLAY AND KEYPAD LOCK
CHECK-SUM CALCULATION
MODBUS-RTU PROTOCOL
FUNCTIONS SUPPORTED IN MODBUS
COMMUNICATION ERROR MANAGEMENT
LIST OF AVAILABLE REGISTERS
POSSIBLE COMMANDS TO BE SENT TO COMMAND REGISTER (40006)
ANALOG OUTPUT SETTING
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
COMMUNICATION EXAMPLES
CANOPEN
TECHNICAL SPECIFICATIONS AND CONNECTIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
DEVICENET
TECHNICAL SPECIFICATIONS AND CONNECTIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
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CC-LINK
TECHNICAL SPECIFICATIONS AND CONNECTIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
ETHERNET TCP/IP
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC SETUP
DIAGNOSTIC
WEBSITE
ETHERCAT
TECHNICAL SPECIFICATIONS
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
ETHERNET/IP
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
MODBUS/TCP
TECHNICAL SPECIFICATIONS
PC/PLC SETUP
IP ADDRESS SETTING
POWERLINK
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
PROFIBUS-DP
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
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PROFINET-IO
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
SERCOSIII
MENU LOCKING
MENU UNLOCKING
TEMPORARY MENU UNLOCKING
DATA DELETION AND PROGRAM SELECTION
KEYPAD OR DISPLAY LOCKING
TECHNICAL SPECIFICATIONS
INSTRUMENT SETUP
PC/PLC SETUP
POSSIBLE COMMANDS TO BE SENT TO THE COMMAND REGISTER
REAL CALIBRATION COMMANDS (WITH SAMPLE WEIGHTS)
RESERVED FOR THE INSTALLER
WARRANTY
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USER WARNINGS
RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT
-Keep away from heat sources and direct sunlight
-Do not wash with water jets
-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
-If the working temperature reaches the permitted limits, it is advisable to distance the
instrument to ensure adequate air flow and avoid malfunctions (Example: sudden
shutdowns or disconnections)
The terminals to be connected to ground as indicated in the instrument's wiring
diagram, must have the same potential as the weighed structure (same earthing pit or
earthing system). If you are unable to ensure this condition, connect a grounding
wire from the terminals of the instrument (including the terminal - SUPPLY) to the
weighed structure.
The cell cable should be individually led to its panel input should 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 meters with AWG24, shielded and twisted cables
-Analog current output: up to 500 meters with 0.5 mm2 cable
-Analog voltage output: up to 300 meters with 0.5 mm2 cable
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 a watertight junction box and terminal box if necessary. 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).
RECOMMENDATIONS FOR INSTRUMENT INSTALLATION
RECOMMENDATIONS FOR LOAD CELL INSTALLATION
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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 and 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 activity
in the installation setting and stability of the support structure.
GROUNDING 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 grounding 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 grounding system may not affect the operation of the
weighing system, however, this does not rule out the possibility that the cells and
connected instrument may be damaged. It is not recommended to achieve grounding
continuity through metal parts contained in the weighed structure.
FAILURE TO FOLLOW THE INSTALLATION RECOMMENDATIONS WILL BE
CONSIDERED A MISUSE OF THE EQUIPMENT
OK OK
NO NO
NO
OK
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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.
-Turn off the instrument.
-Disconnect the load cells from the instrument and make sure that there is no
moisture in the load 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.
-Turn on the instrument.
-Remove the load cell to be tested from beneath the container or lift the container
support.
-Make sure that the two excitation wires from the load cell that are connected to
the instrument (or amplifier) read 5 VDC ±3%.
-Measure the response signal between the positive and the negative signal wires by
directly connecting them to the multimeter, and make sure that it reads between 0 and
0.5 mV.
-Apply load to the load cell and make sure that there is a signal increment.
IF ONE OF THE ABOVE CONDITIONS IS NOT MET, PLEASE CONTACT
TECHNICAL SUPPORT.
3 s
LOAD CELL INPUT TEST (QUICK ACCESS)
LOAD CELL TESTING
Load cell resistance measurement (use a digital multimeter):
Load cell voltage measurement (use a digital multimeter):
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The INF1 is a weight transmitter with a 6-wire load cell 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 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.
Optoisolated 16 bit analog output (tension or current).
MAIN INSTRUMENT SPECIFICATIONS
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POWER SUPPLY & CONSUMPTION 12/24 VDC ±10%; 5 W
No. OF LOAD CELLS IN PARALLEL & SUPPLY max 8 (350 ohm); 5 VDC / 120 mA
LINEARITY < 0.01% F.S.
ANALOG OUTPUT LINEARITY < 0.01% F.S.
THERMAL DRIFT < 0.0005% F.S./°C
ANALOG OUTPUT THERMAL DRIFT < 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
3 RELAY OUTPUTS max 115 VAC; 150 mA
2 DIGITAL INPUTS 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 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 max 30 VAC, 60 VDC; 150 mA
Equipment to be powered by 12-24 VDC LPS or Class 2 power source.
TECHNICAL SPECIFICATIONS
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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.
This is described in the RS485 SERIAL COMMUNICATION section.
LOAD CELL
13 14 15 16 17 18 19 20
1 2 34 7 8 9
12/24 VDC
SUPPLY
INPUTS
supply 5-24 VDC
OUTPUTS
max 115 VAC 150 mA
10 11 12
ANALOG
OUTPUT
INF1 ONLY
RS485
65
WIRING DIAGRAM
INF1 - INF1485 - INF1PROFI
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 INPUT AND OUPUT CONFIGURATION).
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TERMINALS LEGEND
1 -LOAD CELL EXCITATION (-EX) 11 +ANALOG OUTPUT
0-10 V
2 +LOAD CELL EXCITATION (+EX) 12 -ANALOG OUTPUT
COMMON
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 20 -SUPPLY(12/24 VDC) RS485:
SHIELD, GND
INF1 (other models)
LOAD CELL
1 2 34 7 8 9
12/24 VDC
SUPPLY
INPUTS
supply 5-24 VDC
OUTPUTS
max 115 VAC 150 mA RS485
65
15 16 17 18 19 20 21 22
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 INPUT AND OUTPUT CONFIGURATION).
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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)
9 INPUT COMMON (-VDC 0 V)
TERMINALS LEGEND
22 -SUPPLY (12/24 VDC) RS485:
SHIELD,GND
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.
mV load cell test 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 menu LEDs light up in sequence to indicate that it is not displaying a weight.
0
LED AND KEYS FUNCTIONS
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MENU MAP
key (no further confirmation is Into menu changes are applied right after pressing the
required).
SETPOINT
SYSTEM PARAMETERS
+
3 s
+
3 s
INF1 only
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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 TARE WEIGHT ZERO SETTING).
Check the calibration with sample weights and correct the indicated weight if
necessary (see REAL CALIBRATION (WITH SAMPLE WEIGHTS)).
-If the instrument HAS NOT BEEN CALIBRATED (missing plant system
identification tag)proceed with calibration:
If load cells data is unknown, follow the procedure in the REAL CALIBRATION
(WITH SAMPLE WEIGHTS) section.
Enter the rated data of the load cells following the procedure given in the
THEORETICAL CALIBRATION section.
Reset to zero (see TARE WEIGHT ZERO SETTING).
Check the calibration with sample weights and correct the indicated weight if
necessary (see REAL CALIBRATION (WITH SAMPLE WEIGHTS)).
-If you use the analog output, set the desired analog output type and the full scale
value (see ANALOG OUTPUT).
-If you use serial communication, set the related parameters (see SERIAL
COMMUNICATION SETTING).
-If setpoints are used, set the required weight values and the relevant parameters (see
SETPOINT PROGRAMMING and INPUT AND OUTPUT CONFIGURATION).
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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
FULL SCALE = 1,000 x 4
corresponding
the number of cells used. Example: 4 cells of 1000 kg
= 4,000. The instrument is supplied with a theoretical full scale value
to 10,000. 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, the sensitivity or the division, the real
calibration is canceled and the theoretical calibration only is considered valid.
-If the theoretical full scale and the recalculated full scale in real calibration (see
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 divisions, the system's
parameters containing a weight value will be set to default values (setpoint,
hysteresis, etc.).
+
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MAXIMUM CAPACITY
: maximum displayable weight (from 0 to max 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
key
This menu may also be accessed directly from the weight display, holding down
the 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 weighted structure
tare, for example because it contains product that cannot be unloaded. Set in this
parameter the estimated zero value (from 0 to max 999999; default: 0).
+
+
+
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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 a sample weight onto the weighing system that is 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 1,000 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, then remove the 500 kg weight too and 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 5 POINTS:
It is possible to perform a linearisation of the weight repeating the above-described
procedure up to a maximum of five points, using five different sample weights. The
procedure ends by pressing the button or after entering the fifth 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, return to the weight display and then re-enter
the calibration menu.
By pressing after confirming the sample weight that has been set, the full scale appears
recalculated according to the value of the maximum sample weight entered, with reference
to the cell sensitivity set in the theoretical calibration ( ).
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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 stabilize 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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