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User’s & Technical Manual –

LEVEL TRANSMITTER LTR7000

GELEC

Industrial Electronics

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21

LTR7000 Connection Diagram (V & mA outputs used)

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Summary of Contents for LTR7000

Page 1: ...User s Technical Manual LEVEL TRANSMITTER LTR7000 GELEC Industrial Electronics PAGE 1 LEVEL TRANSMITTER LTR7000 INDUSTRIAL ELECTRONICS ...

Page 2: ...WARRANTY GENERAL TERMS AND CONDITIONS 4 3 DISPOSAL OF OLD ELECTRICAL ELECTRONIC EQUIPMENT 5 4 LEVEL TRANSMITTER LTR7000 5 5 GENERAL DESCRIPTION 6 6 FEATURES 8 7 LTR7000 OVERVIEW CONFIGURATION 11 8 INSTALLATION 14 9 ELECTRICAL SECTION 17 10 CALIBRATION PROCESS DEFAULT SETTINGS 22 11 DIMENSIONS 27 12 TECHNICAL SPECIFICATIONS 28 ...

Page 3: ...nnection cabling with wet hands Disconnect power supply from the LTR7000 before maintenance or configuration to avoid the risk of electric shock Attempting to use a malfunctioning LTR7000 can be dangerous Install the LTR7000 in an appropriate area LTR7000 consists of a waterproof stainless steel tube and an IP66 polycarbonate enclosure with cable gland which makes it appropriate for harsh industri...

Page 4: ...LEC and authorized distributors will at their option either repair or replace the faulty product with the same or similar model GELEC and authorized distributors shall have no obligation under this warranty however in the following cases Any defect caused by freight damage accident disaster faulty maintenance or improper handling Any defect caused by modification alteration abuse misuse or incorre...

Page 5: ...ffective use of the LTR7000 we recommend that you read the information in this manual carefully and follow the instructions contained This manual is a complete guide for the LTR7000 with information on unit user maintenance unit installation and operational instructions Do not touch parts of the LTR7000 that are not referred in this manual Keep this manual for immediate reference It should help in...

Page 6: ...t signal 4 20 0 20 4 21mA 0 5 0 10V proportional to the level height and available for further processing The two output signals can be utilized simultaneously or independently and their respective output range is selected through a dip switch LTR7000 zero and span settings can be easily rescaled in order to meet each application s operating requirements while factory default settings can be resto...

Page 7: ...elevant output signal Status LED calibration button configuration dip switch Factory calibrated to full measuring range Factory default settings can be restored Stainless steel square tube 12x12mm IP66 robust and durable structure 15 36 VDC 2 5W max Protective circuit against reverse polarity ADVANTAGES Reliable and cost effective operating philosophy Unaffected from media variables foam viscosity...

Page 8: ...LOG OUTPUTS FIVE OUTPUT RANGES AVAILABLE LTR7000 provides two analog outputs mA V which can be used either simultaneously or independently There are five common output signal standards available covering the majority of process control applications The selection of the desired output range can be made from the internal configuration dip switch SW1 SW2 SW3 The available output ranges are the follow...

Page 9: ...de its output ranges in different level limits than the factory pre calibrated ones There is also the option to restore the default factory calibration settings at any time if needed Refer to the relevant section for more information TWO ERROR STATES ERROR OUTPUT LTR7000 is designed to detect and manage two Error states that are likely to occur As long as the device is in Error state the STATUS LE...

Page 10: ... OVERHEATING Internal overheating is unlikely to occur and may be caused due to wrong electrical connections excessive temperature in the installation area or LTR7000 hardware damage Confirm that all connections and installation environment meet the device specifications ERROR 2 STATUS LED FLASHING RED 1Hz THE FLOAT IS MAGNETICALLY UNCOUPLED FROM THE ACTIVE MEASURING SEGMENT OR INTERNAL HARDWARE F...

Page 11: ...e calibration button inside the transmitter enclosure is used in LTR7000 calibration process and when the calibration settings need to be reset to default This button must be used by an engineer familiar with the device operation and the application in general Refer to the relevant sections in this manual for more information CONFIGURATION DIP SWITCH The internal 4 position dip switch specifies th...

Page 12: ...mA output range is not set to 4 21mA setting SW1 ON SW2 OFF V output doesn t have a normal behavior with this mA setting selected and cannot be used SW4 switch Output value during ERROR state With SW4 switch you can select the output value during ERROR state according to the selected output range Refer to the ERROR section in this manual for more information about the possible errors 4 20mA 0 20mA...

Page 13: ...egment of the LTR7000 square tube includes the measuring hall effect sensors and this is defined by two engraved lines at the back side of the tube The bottom engraved line is located 3cm above the bottom of the tube in all LTR7000 versions The top engraved line can be found close to the transmitter enclosure The distance between them depends on the LTR7000 version Install LTR7000 in a way that th...

Page 14: ...o keep it protected from steam extremely low high temperatures direct sunlight and excessive amount of liquids on the enclosure Fluid insertion into housing may cause permanent damage electric shock or fire Install far from strong magnetic fields that could affect the device measurement and provide sufficient space for maintenance and inspection Maintain the sensor clean and never operate it with ...

Page 15: ...suring segment limits even if the fluid level gets out of these limits in some process stages tank draining overflowing etc The magnetic float must move freely during level alterations and not being blocked by the measuring chamber or possible sediments dirt dregs etc Ensure that the float installation environment allows proper and smooth vertical movement Partial or full blockage will cause fault...

Page 16: ...ent during process stages follow the below procedure Empty the tank so the magnetic float drops at the lowest possible position inside the measuring chamber Having the dip switch SW4 to ON position and the LTR7000 far from the measuring chamber and the magnetic float monitor its output with a multimeter At this point the output provides an error value 24mA because the magnet is uncoupled from the ...

Page 17: ...not solder the conductors as it affects the proper connection quality Two conductors with the same cross section make contact safely in the clamping parts If necessary copper ferrules can be used as a protection against splicing when stranded conductors are wired In general terms ensure that you are having reliable mechanical connection and electrical contact CABLE GLAND At the bottom side of the ...

Page 18: ...tput signal during ERROR state almost equal to power supply voltage VPS 1V The output current limit is 500mA while the Current Limit Initial Peak is 3A max If you don t need this output leave the relevant terminals unconnected Refer to the relevant section in this manual for more information TERMINALS 5 4 V OUTPUT SIGNAL Terminals 5 VOUT and 4 COM provide the Voltage output signal during operation...

Page 19: ...For having the signal unaffected from any interference it is recommended to use a shielded cable with twisted pair properly grounded at the side of the signal receiving device MAXIMUM LOAD RESISTANCE RL The output current is proportional to level height In order to get proper and linear mA fluctuation a maximum load resistance RL including line resistance must not be exceeded depending on the supp...

Page 20: ...User s Technical Manual LEVEL TRANSMITTER LTR7000 GELEC Industrial Electronics PAGE 20 LTR7000 Connection Diagram only mA output used LTR7000 Connection Diagram only V output used ...

Page 21: ...User s Technical Manual LEVEL TRANSMITTER LTR7000 GELEC Industrial Electronics PAGE 21 LTR7000 Connection Diagram V mA outputs used ...

Page 22: ... if the level during process exits the calibrated level limits but it is still within the LTR7000 active measuring segment there will not be an ERROR 2 output signal In this case the output maintains the minimum maximum value of the selected output range LOW LEVEL Low Level is defined as the level where the LTR7000 provides the minimum output value of the selected output range for example 4mA if t...

Page 23: ...t value of the selected output range for example 20mA if the selected range is 4 20mA Unless otherwise stated on the product label LTR7000 is factory calibrated to provide the maximum output when the float s magnet north pole is aligned with the top engraved line which defines the high end of the device s active measuring segment FACTORY CALIBRATED HIGH LEVEL max output signal ...

Page 24: ... LTR7000 GELEC Industrial Electronics PAGE 24 OPERATING LEVEL between LOW and HIGH Any modification of the calibration must be processed by an engineer familiar with the device operation the associated equipment and the application in general ...

Page 25: ...econfigures its output linearization Use Calibration Button carefully and avoid any contact with the LTR7000 board and components Short circuits or electrostatic discharge may permanently damage the device After any calibration procedure connect properly a multimeter to confirm the desired output behavior RESET TO DEFAULT SETTINGS The default factory calibration settings can be restored with the f...

Page 26: ...sent data are not saved and the device maintains the value it had before entering Low Level Calibration mode HIGH LEVEL CALIBRATION PROCEDURE LTR7000 should be in normal operation STATUS LED constant GREEN before proceeding Set the fluid at the level you want the LTR7000 to provide the maximum output value and wait until it becomes calm Press and hold CALIBRATION BUTTON until the STATUS LED starts...

Page 27: ... TRANSMITTER LTR7000 GELEC Industrial Electronics PAGE 27 11 DIMENSIONS LTR7065 LTR7100 LTR7135 LTR7170 LTR7205 A TOTAL HEIGHT 790 1140 1490 1840 2190 B MEASURING SEGMENT 650 1000 1350 1700 2050 C OFFSET 30 All dimensions are in mm ...

Page 28: ...s Internal Hall Effect Sensors Contactless switching Hall voltage generator for magnetic sensing Noise rejection Temperature compensated 120 Gauss 12mT typical sensitivity Resolution 7mm ELECTRICAL DATA Supply voltage 15 36 VDC Power consumption 2 5 W max ERROR OUTPUT Terminals 2 6 Current limit 500 mA Current limit initial peak 3 A max short circuit protection V OUTPUT Terminals 5 4 Available out...

Page 29: ...ted cooper alloy Clamping parts resistance Electrolytic corrosion Rusting Stress corrosion cracking Conductor cross section range IEC rigid solid 0 34 1 5 mm2 IEC flexible stranded 0 34 1 5 mm2 AWG 22 16 Conductor stripping length 6mm max NOT soldered Tightening torque 0 2 Nm Cable gland M16x1 5mm clamping range Ø4 10mm STANDARDS In conformance with the following standards CE Specifications are su...

Page 30: ... Technical Manual LEVEL TRANSMITTER LTR7000 GELEC Industrial Electronics PAGE 30 INDUSTRIAL ELECTRONICS 4 Kikladon Str Maroussi Athens Greece GR 15125 Telephone 30 210 6144074 Fax 30 210 6144074 info gelec gr ...

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