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Installation user’s manual

AWT20L

AND

AWT20L5

WEIGHT TRANSMITTER

AWT20L_07.10_UK

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Summary of Contents for AWT20L

Page 1: ...Installation user s manual AWT20L AND AWT20L5 WEIGHT TRANSMITTER AWT20L_07 10_UK ...

Page 2: ...the simbologies used in the manual in order to warn the reader Caution High Voltage Caution This operation must be executed by skilled workers Read carefully the following indications Further information SYSTEM IDENTIFICATION ...

Page 3: ...ECTIONS 5 PUTTING INTO OPERATIONS 6 TARE ZERO SETTING 6 MECHANICAL INSTALLATION CHECK 7 CALIBRATION 8 LOAD CELLS VERIFY 11 ANALOG OUTPUT MODIFY 12 TRANSMITTER AWT20L 5VCC VERSION 13 TARE ZERO SETTING 5VCC VERSION 13 CALIBRATION OF INSTRUMENT 5VCC VERSION 14 EARTHING SYSTEM 15 DECLARATION OF CONFORMITY 17 ...

Page 4: ... load cells and the cables relevant to the signal amplifiers must be led alone into the piping or trough and laid as far as possible from the power cables 6 The entry into the cable board of both cells and amplifiers must be independent on one side or the other of the board and directly connected to the terminal board of the device without being interrupted by bearing terminal boards or passing th...

Page 5: ... FINE FULL SCALE by trimmer 10 range OPERATING TEMPERATURE RANGE 10 to 50 C STORAGE TEMPERATURE RANGE 20 to 70 C THERMIC STABILITY 0 01 of range for 10 C TIME OF THERMIC STABILIZATION 10 minutes ANALOG OUTPUT AWT20L is provided with the following outputs 0 10 Vdc terminals 22 23 0 20 mA 4 20 mA terminals 21 23 To modify the output follow the procedures at chapter ANALOG OUTPUT MODIFY In the standa...

Page 6: ...TRICAL CONNECTIONS WARNING The procedures here below described have to be carried out by specialized personnel only 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Filter 23 21 22 25 24 26 F S E2 ZERO ZERO ...

Page 7: ... to zero as follows Use the zero fine trimmer for little variations if it isn t sufficient use the dip switches of coarse zero to approach zero display as much as possible then use the trimmer of fine zero again DIP SWITCHES OF COARSE ZERO 0 OFF 1 ON REGISTERED VALUES WITH 1001 AMPLIFICATION AND ALL AMPLIFICATION TRIMMER CLOCKWISE input mV to set to zero DIP SWITCHES POSITION from mV ALL ZERO TRIM...

Page 8: ...th a tester measure the load cells supply on the terminals 1 and 2 and make sure that there is a supply of about 10 Vdc When the container is empty measure the signal in mV on the terminals 3 and 4 Put a calibrating weight on the scale and measure the signal in mV again Make sure that the signal increase corresponds to the result of the following equation mVtot F S cells mVS S mVtot Millivolt corr...

Page 9: ... exact value if the trimmer isn t sufficient use the dip switches of coarse full scale Then check the 0Vdc or 0mA or 4mA again and if necessary adjust it again put the calibrating weight and check the output repeat this operation until the output is corrected DIP SWITCHES OF COARSE FULL SCALE to obtain 20 mA or 10 Vdc output corresponding to the input mV 0 OFF 1 ON REGISTERED VALUES WITH ZERO DIP ...

Page 10: ... dip switches and the trimmer of fine full scale to obtain in output 20 mA or 5 10 Vdc Bring the mV input to zero and check the 4 0 mA or 0 Vdc output otherwise adjust the new value Move the mV input to the full scale load cells supply x rated output and make sure that the output signal is 20 mA or 10 Vdc Adjust the full scale if necessary If you want the signal 20mA or 10Vdc not at the cells full...

Page 11: ...10 mVtot F S mVS S 9 99 x 2 2500 x 4 x 4000 19 98 10000 x 4000 x 19 98 x 4000 10000 7 992mV so with a input signal of 7 99 mV the output signal obtained must be 10 Vdc or 20 mA ...

Page 12: ...50 ohm or similar to the one indicated on the load cell data sheet The insulation value between the shield and any other cores must be higher than 20 millions ohm Load cells tension measure Use a tester with a supply not higher than 9Vdc From underneath the container take out the cell you intend to check Connect the positive and negative supply of the load cell to the AWT20L and make sure that the...

Page 13: ... mA output on terminals 21 23 Close the jumper E1 to obtain an analog output of 4 20 mA output on terminals 21 23 To increase the tare suppression over 17mV put a resistance of 10K 1 8 of Watt instead of R33 normally is 22 k To have an analogue output with 35 mV in input one must enter a 49 9K resistance 1 precision and temperature precision of 15 ppm in parallel to R11 ...

Page 14: ... fine trimmer for little variations if it isn t sufficient use the dip switches of coarse zero to approach zero display as much as possible then use the trimmer of fine zero again DIP SWITCHES OF COARSE ZERO 0 OFF 1 ON REGISTERED VALUES WITH 1001 AMPLIFICATION AND ALL AMPLIFICATION TRIMMER CLOCKWISE input mV to set to zero DIP SWITCHES POSITION from mV ALL ZERO TRIMMER ANTICLOCKWISE to mV ALL ZERO...

Page 15: ...s operation until the output is corrected DIP SWITCHES OF COARSE FULL SCALE to obtain 10 Vdc output corresponding to the input mV 0 OFF 1 ON REGISTERED VALUES WITH ZERO DIP SWITCHES IN 0000 POSITION AND ALL ZERO TRIMMER ANTI CLOCKWISE input mV to obtain 10Vdc DIP SWITCHES POSITION from mV ALL AMPLIFICATION TRIMMER ANTICLOCKWISE to mV ALL AMPLIFICATION TRIMMER CLOCKWISE 1 2 3 4 1 1 1 1 0 1 1 1 1 0 ...

Page 16: ...ast 16 mm2 cross section l Use Earth plate of suitable length in order to obtain a total resistance of earthing plant lower than 1 Ω WEIGHING STRUCTURE Connect the weighing structure and the possible connected structures for example silos that release material on the weighing structure to the earth through copper cables having at least a 16 mm2 cross section NOTES l In the case the weighing system...

Page 17: ...n weighing structure silo Weighing structure Load cell U bolt between plate under cell and weighing structure not supplied Ø 4 6 16 mm earth cable section not supplied Ø 8 50 mm earth cable section not supplied Junction box ...

Page 18: ...CLARATION OF CONFORMITY This device conforms to the essential standards and norms relative to the applicable European regulations The Declaration of Conformity is available in the web site www diniargeo com ...

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