Load Cell Systems TLM8 Manuale utente

ENGLISH ENGLISH ENGLISH ENGLISH

Installation and User Manual

version 1.06

TLM8

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..................................................................................................................... 7

KEYS AND SYMBOLS FUNCTIONS....................................................................................... 9

MENU MAP ............................................................................................................................ 10

SETPOINT ................................................................................................................................ 10

SYSTEM PARAMETERS ......................................................................................................... 10

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

CONFIRMATION AND CHANGE OF ACTIVE CHANNELS ................................................... 16

EQUALIZATION ....................................................................................................................... 17

FILTER ON THE WEIGHT ....................................................................................................... 18

ANTI PEAK.........................................................................................................................................19

ZERO PARAMETERS.............................................................................................................. 19

RESETTABLE WEIGHT SETTING FOR SMALL WEIGHT CHANGES ...........................................19

AUTOMATIC ZERO SETTING AT POWER-ON ...............................................................................19

ZERO TRACKING ..............................................................................................................................19

SETTING UNITS OF MEASURE.............................................................................................. 20

DISPLAY COEFFICIENT ...................................................................................................................20

OUTPUTS AND INPUTS CONFIGURATION .......................................................................... 22

SEMI-AUTOMATIC TARE (NET/GROSS) ............................................................................... 23

PRESET TARE (SUBTRACTIVE TARE DEVICE)................................................................... 24

SEMI-AUTOMATIC ZERO (WEIGHT ZERO-SETTING FOR SMALL VARIATIONS) ............ 24

PEAK ........................................................................................................................................ 25

ANALOG OUTPUT................................................................................................................... 25

SERIAL COMMUNICATION SETTING.................................................................................... 26

RS485 SERIAL COMMUNICATION ..................................................................................................28

DIRECT CONNECTION BETWEEN RS485 AND RS232 WITHOUT CONVERTER .......................28

AUTOMATIC DIAGNOSTICS OF LOAD DISTRIBUTION....................................................... 29

TEST......................................................................................................................................... 30

EVENTS LOG........................................................................................................................... 30

INFO MENU.............................................................................................................................. 31

SETPOINT PROGRAMMING................................................................................................. 31

USE WITH W SERIES INSTRUMENTS................................................................................. 32

CONNECTION TO THE WEIGHT INDICATOR ....................................................................... 32

ADDITIONAL MENU MAP ....................................................................................................... 33

TLM8 REMOTE CONTROL ..................................................................................................... 34

REMOTE KEYPAD LOCKING ...........................................................................................................34

ADDITIONAL ALARMS ........................................................................................................... 34

ALARMS................................................................................................................................. 35

PRINTING EXAMPLES .......................................................................................................... 37

RESERVED FOR THE INSTALLER ...................................................................................... 39

MENU LOCKING...................................................................................................................... 39

MENU UNLOCKING................................................................................................................. 39

TEMPORARY MENU UNLOCKING......................................................................................... 39

DATA DELETION AND PROGRAM SELECTION................................................................... 39

KEYPAD OR DISPLAY LOCKING .......................................................................................... 40

DECLARATION OF CONFORMITY - EU............................................................................... 41

DECLARATION OF CONFORMITY - UKCA ......................................................................... 42

- 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.

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 top of the

display shows the gross weight; the bottom shows the response

signal of each load cell expressed in mV with three 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.

-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).

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 inputs suitable for assembly on back panel fitted

Omega/DIN rail. Dimensions: 148x92x60 mm. Backlit LCD graphic display, 128x64 pixel resolution,

60x32 mm viewing area. 5-key keypad.

16 bit analog output (tension or current).

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, printer. Optional: integrated Profibus DP,

DeviceNet, CANopen, Profinet IO, Ethernet/IP, Ethernet TCP/IP, Modbus TCP, RS232/RS485,

SERCOS III, PowerLink, CC-Link output.

8 independent channels:automatic detection of connected load cells.

Digital equalization: load cell response uniformed via software.

Load distribution: graph showing the weight percentage on each load cell.

Automatic diagnostics: load distribution check to detect any faults.

Events log: storage of the last 50 events: calibrations, zero-settings, errors, equalizations.

Alarm Relay: outputs can be set to switch in case of alarm.

- 6 -

TECHNICAL SPECIFICATIONS

POWER SUPPLY and CONSUMPTION (VDC)

12/24 VDC ±10%; 5 W

NO. OF LOAD CELLS IN PARALLEL and SUPPLY

max 16 (350 ohm); 5 VDC / 240 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

8 channels, 24 bit (16000000 points), 4.8 kHz

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

600 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

21 levels / 5÷600 Hz

RELAY OUTPUTS

N. 5 - max 115 VAC; 150 mA

DIGITAL INPUTS

N. 3 - 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

ANALOG OUTPUT

16 bit - 65535 divisions

0÷20 mA; 4÷20 mA (max 400 ohm);

0÷10 V; 0÷5 V (min 2 kohm)

RELAY OUTPUTS

N. 5 - max 30 VAC, 60 VDC; 150 mA

Equipment to be powered by 12-24 VDC LPS or Class 2 power source.

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