SGM LEKTRA SGM-101F Page 33 Technical Documentation Manual Download

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Page 33 of 60

SGM-101F - programming menu

10-PROGRAMMING MENU

10.0 M00 - Instantaneous fl ow rate and total net displaying

Displaying only. The display shows the instantaneous

ow rate and net

totalizer value. The “*R” symbol indicates that the transducers echo signal
quality is good; The “*H” symbol indicates that the transducers echo signal
quality is insuf

cient to ensure the correct

ow measurement.

Flow. 25.36 m3/h *R
NET. 24780x1 m3

10.1 M01 - Instantaneous fl ow rate and velocity displaying

Displaying only. The display shows the instantaneous

ow rate and the

uid velocity value in the pipe.

Flow. 25.36 m3/h *R
Vel. 1.6841x1 m/s

10.2 M02 - Instantaneous fl ow rate and forward tot. displaying

Displaying only. The display shows the instantaneous

ow rate and

forward totalizer (POS) value.

Flow. 25.36 m3/h *R
POS. 32562x1 m3

10.3 M03 - Instantaneous fl ow rate and reverse tot. displaying

Displaying only. The display shows the instantaneous

ow rate and

reverse totalizer (NEG) value.

Flow 25.36 m3/h *R
NEG. 7782x1 m3

10.4 M04 - Instantaneous fl ow rate with date and time

displaying

Displaying only. The display shows the instantaneous

ow rate value and

the date (year-month-day) and time (hours: minutes: seconds).

14-04-26 15:43:15 *R
Flow 25.36 m3/h

10.5 M05 - Heat meter totalizer displaying

(for specifi c version only)

Displaying only. The display shows the energy

ow and Heat meter

totalizer value.

EFR 2.2450 GJ/h *R
E.T.

12E+0 GJ

10.6 M06 - T1 and T2 displaying (Heat meter only)

Displaying only. The display shows the T1 and T2 inputs.

T1= 32.812C, 112.76
T2= 32.812C, 112.76

10.7 M07 - AL3 and AL4 analog input displaying

NOT AVAILABLE.

AI3= 0.0152, 0.0729
AI4= 0.0152, 0.0729

10.8 M08 - Measurement status and error codes displaying

Displaying only. The display shows the system codes and messages.
A summary codes table is on page 55.

*H--------------------H--
Poor Signal Detected

10.9 M09 - Daily totalizer displaying

Displaying only. The display shows the daily

ow totalizer.

Net Flow Today M09

592 m3

10.10 M10 - Pipe outer circumference programming

The display shows the previously set value. By entering a new value, the
system will automatically calculate the pipe outer diameter new value
(M11).

Pipe Outer Perimeter

314.159

Summary of Contents for SGM-101F

Page 1: ...SGM 101F transit time ultrasonic flowmeter technical documentation EN Rev B ...

Page 2: ...SITIONING 7 INSTALLATION 8 ELECTRICAL CONNECTIONS 9 CONFIGURATION 10 PROGRAMMING MENU 11 MAIN PARAMETERS DESCRIPTION 12 TROUBLESHOOTING 13 COMMUNICATION PROTOCOL 14 NOTE 15 FACTORY TEST AND QUALITY CERTIFICATE page 3 page 4 page 6 page 7 page 10 page 11 page 15 page 24 page 28 page 33 page 51 page 55 page 56 page 57 page 60 ...

Page 3: ...ginal term of guarantee whereas if the Product is replaced it will have 12 twelve months of guarantee The warranty will be null if the Client modifies repair or uses the Products for other purposes than the normal conditions foreseen by instructions or Contract In no circumstances shall SGM LEKTRA be liable for direct indirect or consequential or other loss or damage whether caused by negligence o...

Page 4: ...intop 7 Heat counter connector opz 3 2 1 5 4 6 7 2 1 IDENTIFICATION Each meter has an adhesive identification plate on which are the meter main data The following picture describes the information and data on the identification plate 1 Product code 3 Serial number 2 Power supply SGM 101FWATL 1NA 230Vdc 50 60Hz FU0101600357 2 3 1 Mod P S S N ...

Page 5: ... measure the fluid velocity inside a pipe The clamp on transducers models allow an easy installation The transit time flow meter uses two ultrasonic transducers that work as transmitters and receivers They are installed externally to the pipe at a specific distance from each other They can be installed at V mode 2 sonic section at W mode 4 sonic section or at Z mode 1 sonic section The installatio...

Page 6: ...urement period 500ms Serial port RS485 Communication protocol MODBUS RTU or ASCII opz Data logger on SD card opt or via MODBUS Programmable frequency output 0 5000Hz Relay output n 1 for pulse totalizer or alarm Medium speed range 12m s Unit working temperature 20 60 C Ambient humidity non condensing 85 RH 40 C Tasducer working temperature TS 2 TM 1 TL 1 30 90 C TS2H TM1H 30 160 C TC 1 TLC2 40 160...

Page 7: ...S 180 179 215 120 138 157 74 Ø8 Ø8 4 80 132 5 4 1 SGM 101F MECHANICAL DIMENSIONS Transducer Type Features TS 2 Dimensions 67mm 28mm 32mm Pipe Ø range 20 100mm 4 Temperature 30 90 C Menu 23 19 CLAMP ON TS 2 4 2 TRANSDUCERS DIMENSIONS AND FEATURES ...

Page 8: ...nu 23 19 CLAMP ON TS 2 TM 1 Dimensions 89mm 42mm 44mm Pipe Ø range 50 700mm 2 40 Temperature 30 90 C Menu 23 16 CLAMP ON TM 1 TM1H Dimensions 89mm 42mm 44mm Pipe Ø range 50 700mm 2 40 Temperature 30 160 C Menu 23 16 CLAMP ON TM 1 TL 1 Dimensions 123mm 57mm 54mm Pipe Ø range 300 4000mm 3 160 Temperature 30 900 C Menu 23 20 CLAMP ON TL 1 ...

Page 9: ... 3 160 Temperature 40 160 C Max pressure 1 6Mpa 16bar Menu 23 17 INSERZ TC 1 TLC2 for non metallic pipes Dimensions 165mm 287mm 330mm Pipe Ø range 80 4000mm 3 160 Temperature 40 160 C Max pressure 1 6Mpa 16bar Menu 23 21 INSERZ TLC 2 PT100 With brass plate Dimensions Ø3 185 CONNECTOR 4 WIRES CABLE M12 Temperature 40 160 C ...

Page 10: ...NESS Value measured on site using an appropriate tool caliper ecc or from the technical data of the hydraulic circuit programming in M12 In the presence of tubes without inner lining is possible to use the SGM 100T thi ckness gauge 5 3 PIPE MATERIAL Value detectable on site or from the technical data of the hydraulic circuit programming in M14 5 4 INNER LINING MATERIAL Value detectable on site or ...

Page 11: ...etter will be the SNR and consequently the accuracy In normal operating conditions the Q value displayed to the menu M90 is between 60 and 90 In the case of a lower value check 1 Any interference with other instruments 2 The transducers coupling with the pipe surface clean the pipe or add more coupling grease 3 The mounting position on the pipe 6 1 3 Total transit time and Delta Time M93 The numbe...

Page 12: ...s positioning 6 4 MARKING TOOLS To mark the transducers positioning points on the pipe surface are sufficient simple but at the same time effective tools a paper tape with a minimum width of 50mm a pencil or a thin tip pen a meter 6 5 MARKING METHODS 6 5 1 Z type positioning For a correct transducers positioning proceed as follows 1 wrap the pipe with the paper tape making sure that the edges are ...

Page 13: ...w the straight line D parallel to the pipe axis and equal to the value showed in M25 previously calculated to identify point E D A B E 5 Points A and E are the mounting positions of the transducers A E 3 Identify the point B positioned at 180 degrees from point A A B ...

Page 14: ...r a correct transducers positioning proceed as follows 1 Identify point A which will be the mounting position of the first transducer A 2 From point A draw a straight line S parallel to the pipe axis and equal to the value showed in M25 previously calculated to identify point E A B ...

Page 15: ...ing to the transducers model at least as shown in the following table A B TS 2 TM 1 TL 1 A 70mm 90mm 140mm B 40mm 55mm 80mm 6 7 CLAMP ON TRANSDUCERS FIXING 1 On the transducer lower surface apply a thick layer of acoustic coupling grease 2 Fix the transducer on the pipe surface at the transducer installation point already cleaned 3 Securely fasten the transducers on the pipe with the supplied stee...

Page 16: ... which allows to respect the minimum distance between the element of resistance to flow such as curves or derivations and the measuring point See the following table Flow resistance element Upstream side Downstream side 90 curves 15 x DN 5 x DN T junction 40 x DN 5 x DN Adaptors 18 x DN 5 x DN Valves 40 x DN 5 x DN Pumps 20 x DN P ...

Page 17: ...r other surface deterioration circular cross section The ideal points for the transducer positioning are hydraulic circuit lowest point a vertical pipes with the upward flow b inclined pipes with the upward flow c vertical open drain pipes with a section restriction to avoid sudden pipe emptying during flow measurement d a b c Restriction d In the case of a horizontal pipe the transducers position...

Page 18: ...sducers must never be placed in the highest point of the concerned hydraulic circuit because there is greater chance that in that pipeline section will create air pockets vertical open drain pipes without a section restriction to avoid sudden pipe emptying during flow measurement 7 2 POSITIONING DISTANCE The value calculated automatically by the system shown in menu M25 refers to the Lout mounting...

Page 19: ...stream transducer Forward flow direction 7 4 Z INSTALLING Is the installation method for pipes with diameters in the DN300 4000 range Upstream transducer Downstream transducer Forward flow direction 7 5 W INSTALLING Is the installation method for pipes with diameters in the DN20 50 range Upstream transducer Downstream transducer Forward flow direction ...

Page 20: ...in distance from wall ø Pipe Distance transducer Distance between the transducer 200mm Transducer Pipe Transducer 3 Procuring the necessary equipment for drilling the pressure pipes 4 Set the pipe parameters in the menu M23 choose the option 17 or 21 TC 1 or TLC 2 insertion transducer in the menu M24 choose 1 Z installation and in the menu M25 check the positioning distance 5 Determine the best lo...

Page 21: ...ert the drill bit in the ball valve and tighten the seal gland on the male threads so that there is no leakage Fasten the power drill to rod 4 Turn on the drill and drill pipe 5 Unscrew the seal gland and slowly pull out the drill as soon as possible close the ball valve to avoid leakage Use a meter or a caliper to measure the A dimension Slowly insert the transducer into the valve support and ope...

Page 22: ...ation To check the transducers ultrasonic signal emitting orientation check that 1 the outputs cables of both transducers are oriented orthogonally to the pipe axis 9 0 2 the outputs cable on the transducers have the same direction ...

Page 23: ...Page 23 of 60 SGM 101F installation 3 The inclined surfaces of the ultrasonic transducer signal emitter should be directed towards each other 4 Proceed to the electrical connection ...

Page 24: ...ion cables 2 Remove the caps from the cable glands and open the cover by unscrewing the screws 3 Lead the cables into the transmitter through the cable glands 4 Close the cap and tighten the cable glands SCH N L RELAY UP GND DN GND 4 20mA RS485 B A 8 2 POWER CONNECTION 8 2 1 Supply voltages in AC SCH N L RELAY UP GND DN GND 4 20mA RS485 B A L N GROUND POWER SUPPLY ...

Page 25: ...30Vdc SCH RELAY UP GND DN GND 4 20mA RS485 B A 0V 10 30 Vdc GROUND POWER SUPPLY SGM 101F electrical connections SCH RELAY UP GND DN GND 4 20mA RS485 B A Upstream transducer Downstream transducer Forward flow direction 8 3 TRANSDUCER CONNECTION ...

Page 26: ...IN Vout 10V IN1 IN2 COM GND 24 220 110 0 SGM 101F electrical connections 8 4 OUTPUT SIGNALS CONNECTION 6 4 1 Analog output 8 4 2 Pulse output SCH RELAY UP GND DN GND 4 20mA RS485 B A 199 B1X Pulse counter Pulse input 12 COM GT IN1 IN2 RST Internal circuit Pull up resistance Programmable pulse width M54 ...

Page 27: ...Page 27 of 60 SGM 101F electrical connections 8 4 3 MODBUS port SCH RELAY UP GND DN GND 4 20mA RS485 B A PLC Pin 1 Blue Pin 2 Brown Pin 3 Pin 4 Black T1 T2 8 5 HEAT METER PT100 CONNECTION ...

Page 28: ...lection Press UP ARROW select to the previous menu during normal menu displaying edit the selected digit during menu programming or selecting select the previous option during menu programming Press SCROLL select the next menu during normal menu displaying select the digit to the right during menu programming or selecting select the next option during menu programming Press ENTER access to the pro...

Page 29: ...tion programming M25 Transducers mounting distance displaying M78 OCT output programming M26 Data storage mode programming M79 Relay output programming M27 Default settings library M80 Batch output programming M28 HOLD mode programming M81 Batch volume programming M29 Empty pipe condition threshold programming M82 SGM 101F unit events displaying M30 Measurement units standard programming M83 Total...

Page 30: ...menu to enable and disable the forward POS reverse NEG or net NET flow totalizer 9 5 5 How to reset the totalizers Use the M37 menu 9 5 6 How to use the delay time The delay time acts as a filter to make stable the measure By setting 0 in the M40 menu there is no filter The maximum setting is 9990sec that refers to a response time of 9990 seconds The delay time is normally used 10s 9 5 7 How to us...

Page 31: ... totalized volume can be sent as an output pulse The totalizer will generate one pulse per volume unit The pulse totalizer can be generated by the OCT relays or BUZZER hardware devices For example configure the forward flow pulse output POS where each pulse corresponds to 0 1 cubic meters of flow the pulse output will be configured with the OCT output so that for every 0 1 cubic meter of volume OC...

Page 32: ...talizers Use M82 to display the partial totalizer daily monthly or yearly 9 5 21 How to use the manual totalizer Use M38 then press ENTER to start and stop the totalizer 9 5 22 How to check the ESN and other minor details The ESN is an 8 digit code that identifies the product the version and the manufacture date The user can use the ESN also for the instrumentation management Can be found in M61 O...

Page 33: ...h R NEG 7782x1 m3 10 4 M04 Instantaneous flow rate with date and time displaying Displaying only The display shows the instantaneous flow rate value and the date year month day and time hours minutes seconds 14 04 26 15 43 15 R Flow 25 36 m3 h 10 5 M05 Heat meter totalizer displaying for specific version only Displaying only The display shows the energy flow and Heat meter totalizer value EFR 2 24...

Page 34: ... mm 10 14 M14 Pipe material programming The display shows the previous setting The available materials are 0 Carbon Steel 1 Stainless Steel 2 Cast Iron 3 Ductile Iron 4 Copper 5 PVC Plastics in general 6 Aluminium 7 Asbestos 8 Fiberglass Epoxy 9 Other the 9 option actives M15 for the sound speed in the pipe material Pipe Material 1 Stainless Steel 10 15 M15 Pipe material sound velocity programming...

Page 35: ... display shows the previous setting The available fluids are 0 Water general 1 Sea Water 2 Kerosene 3 Gasoline 4 Fuel Oil 5 Crude Oil 6 Propane 45 C 7 Butane 0 C 8 Other Liquid the 8 option actives M21 for the sound speed in the fluid 9 Diesel Oil 10 Castor Oil 11 Peanut Oil 12 Gasoline 90 13 Gasoline 93 14 Alcohol 15 Water 125 C Fluid Type 0 Water General 10 21 M21 Fluid sound velocity programmin...

Page 36: ...S 2 see features on page 7 20 Clamp on TL 1 see features on page 8 21 Insertion TLC2 see features on page 9 22 Clamp on M2 23 Clamp on L2 Transducer Type 16 Clamp on TM 1 10 24 M24 Transducers mounting method programming The display shows the previous setting The available mounting methods are 0 V 1 Z Transducer Mounting 0 V 10 25 M25 Transducers mounting distance displaying The display shows the ...

Page 37: ... the 1 option press UP ARROW or SCROLL and confirm by pressing ENTER The system automatically displays M23 Save load Parameters 4 259mm Z Stainles Save Load Parameters 1 Save Parameters 10 28 M28 HOLD mode programming The display shows the previous setting Selecting YES in the case of transducer echo signal temporary loss the SGM 101F maintains the last valid measurement Selecting NO the instantan...

Page 38: ...ows press ENTER Press UP ARROW or SCROLL to select the volume measure unit and press ENTER to confirm Available settings Cubic Meter m3 Liter l US Gallon Gal UK Gallon IGL Million US Gallon Cubic Feet CF US Oil Barrel OB UK Oil Barrel IB Totalizer Unit Liter I 10 33 M33 Totalizers multiplier programming The display shows the previous setting Default value x1 Available settings 0 x0 001 1E 3 1 x0 0...

Page 39: ...ll Select Totalizer Reset Finished Totalizer Press ENT When Ready 10 38 M38 Partial totalizer In this menu a partial totalizer with manual start and stop is available To start the partial totalization press ENTER Pressing ENTER will stop the totalization Further pressing ENTER will reset and restart the partial totalizer Press UP ARROW or SCROLL to exit 128 73SEC 5 2547 ON 21 m3 10 39 M39 Language...

Page 40: ...u it s possible to set an Offset value to be added or subtracted from the instantaneous flow rate Manual Zero Point 0 m3 h 10 45 M45 Correction factor programming In this menu it s possible to set the correction factor Verify on matched ultrasonic transducers the presence of a label indicating the value to set Default value 1 Scale Factor 1 10 46 M46 MODBUS network address programming In this menu...

Page 41: ...elect ON with UP ARROW and press ENTER Pressing UP ARROW is possible to select which data to include in the data logger To enable the data storage press ENTER select ON and confirm with ENTER See the table below for the available data Data Logger Option ON 0 Data and Time ON 0 DATE AND TIME 1 SYSTEM STATUS 2 CURRENT WINDOWS 3 SIGNAL STRENGTH 4 FLOW RATE 5 VELOCITY 6 NET TOTALIZER 7 POS TOTALIZER 8...

Page 42: ...ted Set the timer M51 will display the next data recording time and the data recording number still to be made Data Logger Set up Start Time 15 50 00 Data Logger Set up Interval 00 01 00 Data Logger Set up Log Times 1000 Data Logger Set up NEXT 17 13 50 0977 10 52 M52 Data transmission programming In this menu it s possible to set the data transmission mode Default mode 1 INVIA CON RS 485 Availabl...

Page 43: ...utput signal 0mA 4 output signal 4mA 8 output signal 8mA 12 output signal 12mA 16 output signal 16mA 20 output signal 20mA CL Checkup mA 0 10 59 M59 Analog output status displaying In this menu it s possible to display the analog output signal instantaneous value NB It is not a measured value but a value derived from a mathematical calculation depending on the M55 M56 and M57 settings CL Current O...

Page 44: ... the frequency output high flow rate High FO Flow Rate 10800 m3 h 10 70 M70 Backlight interval programming In this menu it s possible to set the display backlight time Range 0 60000 seconds LCD Backlight Option 10 Sec 10 71 M71 LCD contrast programming In this menu it s possible to set the LCD contrast Range 00 31 Press ENTER to enter then increase the contrast with the UP ARROW or decrease the co...

Page 45: ...ver 100 18 Timer M51 Daily 5 Fo Over 120 19 Timed Alarm 1 6 Alarm 1 20 Timed Alarm 2 7 Reverse Alarm 2 21 Batch Total Full 8 Batch Controller 22 Timer by M51 9 POS Int Pulse 23 Batch 90 Full 10 NEG Int Pulse 24 Key Stroking ON 11 NET Int Pulse 25 Disable BEEPER 12 Energy POS Pulse 13 Energy NEG Pulse BEEPER SET UP 24 Key Stroking ON 10 78 M78 OCT output programming In this menu it s possible to se...

Page 46: ...ng 1 Serial Port 2 Al3 Rising Edge 3 Al3 Falling Edge 4 Al4 Rising Edge 5 Al4 Falling Edge 6 Al5 Rising Edge 7 Al5 Falling Edge 8 Timer Periodical 9 Time daily Batch Trigger Select 0 Key Pressing 10 81 M81 Batch volume programming In this menu it s possible to preset the batch volume value To preset the batch volume proceed as follows press ENTER Set the predetermined volume Change the digit with ...

Page 47: ...ion Enabling In this menu it s possible to enable the flow totalizers automatic correction during the period in which the unit SGM 101F is turned off An average flow rate value is calculated using the measured flow rate before shutdown and the flow rate measured after the system restarts This calculated average flow rate value is then used to increase the flow totalizer Automatic Amending OFF 10 8...

Page 48: ... quality Q has a range from 00 0 to 99 9 Normally the Q value is greater than 60 0 Strength Quality UP 78 5 DN 78 8 Q 92 10 91 M91 TOM TOS displaying In this menu it s possible to display the ratio between the calculated and the measured transit time Normally the value should be 100 3 Differences in excess of the above could mean improper transducers mounting or incorrect programming values T O M ...

Page 49: ...red flow rate displaying In this menu it s possible to display the last measured instantaneous flow rate value Last Flow Rate 24 5 m3 h 10 99 M 4 SGM 101F on off times number displaying In this menu it s possible to see how many times the unit SGM 101F has been switched on and off ON OFF Times 00000024 10 100 M 5 Calculator and Converter In this menu it s possible to use the scientific calculator ...

Page 50: ... M 7 Monthly totalizer displaying In this menu it s possible to display the monthly totalizer Total Flow for Month 135 248 m3 10 103 M 8 Annual totalizer displaying In this menu it s possible to display the annual totalizer Total Flow This Year 35874 8 m3 10 104 M 9 Echo absence error total time displaying H In this menu it s possible to display the echo absence error condition total time TIMER NO...

Page 51: ...terial Pipe Material Carbon Steel Stainless Steel Cast Iron Ductile Iron Copper PVC Plastics in general Aluminium Asbestos Fiberglass Epoxy Other M14 Inner lining material Liner Material None No Liner Tar Epoxy Rubber Mortar Polypropylene Polystyrol Polystyrene Polyester Polyethylene Ebonite Teflon Other M16 Pipe inner lining thickness Liner Thickness Pipe cross section Pipe inner lining thickness...

Page 52: ...pe pipe thickness pipe material eventual inner lining and its thickness transducers mounting method M25 Instantaneous flow rate measure unit Flow Rate Unit Measure units associated with the instantaneous flow rate measurement Is possible to select 8 different measure units for the volume Cubic Meter m3 Liter l US Gallon Gal UK Gallon IGL Million US Gallon Cubic Feet CF US Oil Barrel OB UK Oil Barr...

Page 53: ...w velocity is less than the cutoff value the display will show the instantaneous flow rate measure at fixed 0 Range 0 000 0 25m s Displayed flowrate Actual flowrate LV M41 Zero flow calibration Set Zero When the fluid in the pipe is stopped the flow value must be equal to 0 In case it is not need to calibrate the Zero flow Displayed flowrate Before setting After setting Actual flowrate NB Make sur...

Page 54: ...0mA 4 20mA vs Vel 4 20mA vs Energy M55 4 20mA output scale beginning 4mA Output Value It s the value of quantity babed on M55 choice that is associatet to analog output begin scale M56 4 20mA output full scale VALORE RIF A 20 mA It s the value of quantity babed on M55 choice that is associatet to analog output end scale M57 Date and Time YY MM DD HH MM SS Time and date maintaining is secured by an...

Page 55: ...Error Memory parameter data error Press ENT key and restore default parameters System Data Memory Error System stored data block error Restart or contact headquarters Circuit Hardware Error Sub CPU circuit fatal error Restart or contact headquarters Timer Slow Fast Error System Clock error Restart or contact headquarters Clock Error Abnormal clock inside the hardware Contact headquarters CPU or IR...

Page 56: ...tOver 1 Frequency output over 120 2 frequency output Improper setting or actual flow too high Check the values setted in menu M66 M67 M68 and M69 and if the actual flow is too high F Refer to table 2 1 Error in self diagnosis during power on 2 Permanent hardware error 1 Restart 2 Contact headquarters G Adjustig gain S1 S2 S3 S4 displayed on M00 M01 M02 and M03 The instrument is running the automat...

Page 57: ...____________________ ________________________________________________________________________________________ ________________ _____________________________________________________________________________________ __________________________________________________________________________________________ ________________________________________________________________________________________ _______...

Page 58: ...______________________________ ________________________________________________________________________________________ ________________ _____________________________________________________________________________________ __________________________________________________________________________________________ ______________________________________________________________________________________...

Page 59: ...Page 59 of 60 ...

Page 60: ...that the equipment is conform to the technical requirements on Technical Data and it is made in conformity to the procedure Quality Control Manager Production and check date Transit time ultrasonic flowmeter LTH Electronics Ltd Chaul End Lane Luton Bedfordshire LU4 8EZ England Telephone 44 0 1582 593693 Fax 44 0 1582 598036 email sales lth co uk web www lth co uk ...

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