Trotec LD6000 Operating Manual
Contents
1. 8 7 3 F amp V Mode Frequency and Volume 9 7 3 1 Mode Description 2 HR re rl 9 32 WOOESCELUON a sm cn cs sudo 9 7 3 3 Measuring Procedure 9 7 4 V Mode Level Mode 9 7 4 1 Mode Description 9 042 Mode Selecon 126 000 a eo RET 9 7 4 3 Measuring Procedure 9 7 5 Clear Current Measurement Series 10 7 6 Manual Filter Adjustment and Acoustic Activation 10 2 8 Acoustic Long Term Measuring 10 8 1 Parameter Settings for Acoustic Long Term Measuring 19 8 2 Measuring Procedure 11 9 Trace Gas Detection 11 9 1 Putting the Device into Operation 11 9 2 Display essen een 12 9 3 Normal Measuring with Acoustic Feedback 12 9 4 Defining Alarm Thresholds 13 9 5 Measuring with Zero Calibration 13 9 6 Clearing the Measurement Series Clearing Zero Calibration 13 10 Saving and Loading Measuring Data 14 11 Transferring Measuring Data to a PC 14 12 Troubleshooting 15 13 Changing the Battery Cleaning and Maintenance 16 14 Technical Data 16 15 Information for Use in the Field 17 15 1 Acoustic Leak Detection 1 1 0 17 15 1 1 How Sound Is Crea2. To transfer your data to the PC navigate to the main menu and select the Data Transfer display symbol see chapter 6 2 qm 24 01 11 17 00 Menu Help Please ensure that your PC is connected to the LD6000 and then navigate to the display symbol Data Transfer Confirm your selection and follow the instructions as shown on your PC 14 LD6000 Operating Instructions EN 12 Troubleshooting Acoustic leak detection List of possible errors or faults ErrorFault Description No sound in the headphones The screen remains blank Display brightness too dim The company logo remains on the display iP Possible Cause The sound receiver or the headphones are not connected properly Wrong filter settings The cable that connects the sound receiver and the unit appears to be defective The cable that connects the headphones to the unit appears to be defective in such a case the sound level indicator on the display still works properly Memory settings The batteries are empty The unit is defective The brightness setting has not been set correctly Battery power very low The unit is defective Trace Gas Detection List of possible errors or faults Error Fault Description Possible Cause Recommended Action Check the connections between the connected sound receiver and the connected headphones and the LD6000 Select a broader frequency range e g 50
3. Regardless of the measuring mode you have selected the following parameters can be set for all the measuring modes that can be used to carry out leak detection in the same consistent manner dem 24 01 11 17 00 Menu Help Save 100 50 500 Sensor sensitivity setting Selection of predefined filter settings Volume setting 6 LD6000 Operating Instructions EN 7 1 Parameter Settings in the Acoustic Modes 7 1 1 Adjusting the Sensor Sensitivity dem 24 01 11 17 00 Menu Help Save 0 Em il 30 40 50 60 70 80 90 100 TA 5 CS m4 a n h 1200 To set the sensitivity of the sensor which is connected to your leak detection device navigate in the display window to the symbol for the sensor sensitivity setting activate the symbol and confirm your selection The sensor sensitivity settings window opens The microphone amplification factor that has been currently selected is displayed on a scale from 0 to 100 Turn the dial on the right or touch the touch screen and pull your finger to the sensitivity value which you would like to select The sensitivity value is ideal when the control bar amp on the left is half red as shown Press the cancel key to leave the window without changing the sensitivity value Press the dial on the right to confirm the new setting or press the cancel key You can also confirm the setting change by pressing the symbol for the sensor sensitivity on the touch scree
4. EN LD6000 Operating Instructions 15 13 Changing the Battery Cleaning and Maintenance Changing the Battery There is a battery symbol above the menu bar on the left hand side of the dis play that shows you how much power you batteries have left The more green segments there are the higher the battery capacity If there is only one red segment left then the batteries need to be replaced very soon As soon as the battery voltage drops below the strength that is required to power the unit a warning symbol starts to blink in the middle of the display The batteries should be replaced immediately Change the batteries as follows Power off the unit Unscrew and remove the battery compartment lid see chapter 4 legend item take out the used batteries and replace them with new ones Please make sure that the poles of the batteries you are inserting are properly aligned with the poles inside the battery compartment To power the LD6000 you may either choose to use high quality batteries type LR14 C 1 5 V recommended capacity gt 4 500 mAh or rechargeable batteries When using rechargeable batteries you must make sure that you only use NIMH rechargeable batteries type HR14 1 2 V Do not dispose of batteries in household waste Do not throw into water or fire Please make sure that you dispose of your used batteries according to existing government guidelines and regulations Cleaning and Maintenance LD6000 Measuring Dev
5. Thick pipes or pipes made of synthetic material on the other hand do not oscillate as strongly and the sound that the leak generates does not spread out nearly as far The frequency and the material of the pipes play a major role as far as the distance that the sound travels is concerned As is the case with ground borne sound low frequency sounds travel further distances and softer materials like PVC or PE pipes absorb the energy that the leak causes more strongly than metallic pipes 15 1 1 3 Current Induced Sound Current borne sound is generated at narrow points or bottlenecks for example at valves that are only half or partly open at household connecting points where pipes can have differing diameters or dimensions or when corrosion has formed and pipes are crusted with rust on the inside These factors can cause turbulent currents which can generate frequencies of over 4 000 Hz 15 1 1 4 Interference Factors Sounds from surrounding sources that have been absorbed and filtered by the ground have a similar frequency spectrum to the sound that a leak generates The interference this causes can be likened to stop and go traffic on the roads but with the difference that such a traffic situation is far more disruptive with regard to traffic flow when it happens on a major road than somewhere in the centre of a small town The higher the pressure in the pipe on which an inspection is to be carried out the higher the amount of energy tha
6. e Do NOT immerse the sensor head of the hydrogen sensor in standing water or any other liquids and do not dip into sludge or any sludge like substances e Do NOT bring the sensor head of the hydrogen sensor into contact with fine powder or powdery substances e The user is solely responsible for determining whether he or she considers the measuring results to be valid and for any conclusions that are reached or any measures that are taken as a result thereof We can neither guarantee the validity of any measuring results nor can we accept liability for any such results We are on no account able to accept liability for any damage which may be caused as a consequence of the use of these measuring results 3 Scope of Delivery 2 Intended Use The LD6000 is a combo detector designed to allow the user to carry out elec troacoustic leak detection in pipe systems and to perform non destructive pinpoint leak detection in systems which have been previously flooded with trace gas using the indicative measurement of different hydrogen concentrations The device may be used for this purpose only and only within the technical data parameters as specified Any other use is considered to be not intended for this purpose Electrical and Electronic Equipment WEEE electronic equipment must not be treated as domestic waste but must be disposed of mg Professionally in accordance with Directive 2002 96EU of the EUROPEAN COUNCIL AND PARLIAMENT of 27
7. see chapter 6 4 5 When this product leaves the factory the frequency range is from 0 to 1 200 Hz with a 100 Hz high pass filter and an 800 Hz low pass filter To carry out the setting navigate in the window to the presetting or O which you wish to select activate the setting and confirm your selection by pressing the dial on the right The window then closes and the symbol for the selected filter setting appears as the filter mode symbol Press the cancel key to leave the window without changing the filter setting Important The current measurement series will be cleared when any changes are carried out to the filter settings In addition to the predefined filters you can change the predefined filter settings manually in all the measuring modes at any time between individual meas urements while leak detection is being carried out In order to do so follow the instructions as described in chapter 7 6 7 1 3 Volume Setting qm 24 01 11 17 00 Menu Help Save 0 ra a 30 40 50 60 70 80 90 100 m Hz a ho 1200 You can adjust the volume of the headphones to suit your requirements The volume does not depend on the predefined hearing protection intensity see chapter 6 4 6 which you may have selected 100 LO 0 The volume you have selected will either be displayed as a number or in the form of a tachometer in the symbol for the volume of the headphones Changing the Volume Before or After
8. 3 minutes and is displayed as a blue progress bar below the numerical display The sensor self calibrates during the warm up phase This self calibration is designed to determine the base value for the different hydrogen concentrations that are detected during measuring EN LD6000 Operating Instructions 11 The sensor calibrates independently according to the existing hydrogen concentration in the surrounding air This is why it is especially important that you ensure that the sensor is not near a hydrogen source during the warm up phase We therefore recommend that you either go outside into the open with the LD6000 during the warm up phase or remain in place where you know that the hydrogen concentration is lower lt 1 ppm H9 As soon as the sensor has reached its operating temperature the warm up bar disappears and the LD6000 is ready to use 9 2 Display dm 24 01 11 17 00 Menu Help Save 1000 1000 500 19 IN SI 0 0 5 Bis die You can read and adjust the following parameters and carry out the following actions on the display for trace gas detection e Bar display and the number which displays the current value underneath it e Preset alarm value e Digital display with the current measuring value e Five position bars for the bar display and the numerical display of the previous 5 measurements beginning with Position 1 for the last measurement up to Position 5 f
9. January 2003 regarding old electrical and electronic equipment ey In accordance with the EU European Union Directives on Waste Please dispose of this appliance in a manner appropriate to the relevant legal requirements at the end of its product life The following components are included in the standard scope of delivery e LD6000 measuring device e LD K sound blocking headphones e LD6000 BM universal microphone with magnet adapter e LD6000 DA tripod adapter e LD6000 VL stick extension with tip e LD6000 TG shoulder strap e PC connecting cable e LD6000 carry case The following components are available as optional accessories e LD6000 BMW wind protected ground microphone with dead man s button e LD6000 VK connecting cable e LD6000 DM tripod magnet for LD6000 BMW ground microphone e LD6000 H2 hydrogen hand sensor e LD6000 H2 hydrogen ground sensor EN LD6000 Operating Instructions 3 4 Control Elements and Connecting Ports 0n Off key Left hand volume dial This dial has two functions you can either press OA or turn 2 B the dual function dial Turn the dial to adjust the volume of your headphones while measuring is being carried out Press the dial to clear the current measurement series Record button Touch display You can also use the high resolution colour touch screen to carry out adjustments to the measuring device in pla
10. briefly place your finger on the menu or selection box you wish to select You can also turn the dial either clockwise or anticlock wise continuously to go through all the menu or selec tion boxes in order to get to the box you wish to select Press the dial when you are finished to confirm your se lection The menu or selection box which you have se lected will now be shown mn Press the cancel key to leave the menu or selection box y which is just being shown and return to the last command line which was confirmed 6 2 Main Menu qm 24 01 11 17 00 Help You are in the main menu when you power on the LD6000 for the first time You can navigate to the following sectors from there e Help menu chapter 6 3 e Setting menu chapter 6 4 e Measuring operation acoustic leak detection chapter 7 e Measuring operation acoustic long term measurements 4 chapter 8 e Measuring operation trace gas detection chapter 9 e PC data transfer chapter 11 Press menu in the upper screen bar or the cancel key to return to the main menu from the selected sector 6 3 Help The LD6000 is equipped with an integrated help function which can be accessed from either side Navigate to the menu item Help in the upper menu bar as described in chapter 6 1 to get to the Help main page Scroll to the Help topic which you would like to find out more about and confirm your selection by pressing the dial on the rig
11. connecting cable for LD6000 Temperature conditions Operating 10 C to 60 C Storage 20 C to 60 C 16 LD6000 Operating Instructions EN 15 Information for Use in the Field 15 1 Acoustic Leak Detection 15 1 1 How Sound Is Created When there is a leak in a high pressure pipe system water that leaks out generates sound that is caused by the friction that occurs when the water escapes through the hole at high speed This also leads to oscillations in the pipe itself The sound is carried along the pipe and can be picked up at contact points valves hydrant fittings which can actually be quite far from the actual leak itself and transformed into audible sound by structure borne sound microphones 15 1 1 1 Ground Borne Sound When water that is escaping from a leak comes into contact with the ground then this causes the parts of the ground that it comes into contact with to os cillate The sound spreads out from the leak in circles and can be picked up by a ground microphone near the actual leak The frequency of these signals lies between 30 and 700 Hz Frequencies whose wave lengths are smaller than the depth that the pipes have been laid in are strongly absorbed because of the low pass effect of the surrounding soil This means that only the low frequencies normally reach the surface of the ground If the water has been escaping from the leak for a relatively long period of time a water blister sometimes forms and
12. door symbol on the display Loading Measuring Data qm 24 01 11 17 00 Menu Help Select memory To call up any data that you have previously saved navigate to the display symbol Load Measuring Data and confirm your selection by pressing the right hand dial You can also confirm your selection directly by pressing the symbol Load Measuring Data on the touch screen You can then call up the measuring data you have saved from any one of the memory spaces Turn the right hand dial to navigate to the memory space you wish to select and confirm your selection by pressing the display symbol Load Measuring Data The measuring value you have selected is now displayed 17 Transferring Measuring Data To A PC The measuring values which you have saved to your internal memory can be transferred to your PC for further assessment or documentation You will need the PC connecting cable included in the scope of delivery and a software tool which you can download free of charge at www trotec com IS The software tool which you may choose to download is absolutely free of charge and is not a part of the standard scope of delivery The software is provided without any form of support and any form of guarantee The intuitive user interface is exceptionally easy to work with and understand Further information regarding the software and its use can be found in the application included The display now changes to the memory transfer page
13. mode measuring modes can be changed between individual measurements and the meas urements that were taken prior to the mode change can be either analysed or measuring can be continued The measurement series remains unaffected and is not cleared 7 4 V Mode Level Mode 7 4 1 Mode Description In V mode the measured minimum value only is displayed as a single bar 7 4 2 Mode Selection mm 24 01 11 17 00 Menu Help Save 100 _aii Smart mode f F amp V mode 50 0 a EN 0 600 1200 The measuring mode symbol on the display shows which mode is currently being used If the V mode has not been set navigate to the measuring mode symbol 0 activate the symbol and confirm your selection The window for selecting the measuring mode will then open To set the V mode navigate to the list item V mode and confirm your selection by pressing the right hand dial The window will close and the V mode symbol will be shown 7 4 3 Measuring Procedure mm 24 01 11 17 00 Menu Help Save 50 100 0 0 500 1000 Press the record button to start measuring Keep the button pressed for the duration of the measuring operation The device will stop measuring when the record button is no longer pressed The display can show a measurement series which is made up of the last ten individual measurements The first measurement is displayed on Position 1 Each further measurement beginning with Pos
14. the LD6000 LD6000 BM universal microphone The LD6000 BM is a universal microphone which can be either be used as a probe microphone or a contact microphone Connect the LD6000 VL extension kit to the universal microphone and use as a probe microphone to pinpoint leaks or screw on the optionally available magnet and use as a contact microphone when carrying out leak detection where ferromagnetic pipes for example are involved The contact microphone can then be used in connection with the LD 6000 DA tripod adapter as a ground microphone to locate any potential leaks Using the LD6000 BMW Ground Microphone The LD6000 BMW is a wind protected ground microphone which can be used when carrying out leak detection on solid stable surfaces The LD6000 BMW can be combined with the LD6000 DM tripod magnet for use on loose or unstable surfaces 4 LD6000 Operating Instructions EN Depending on the type of acoustic measurement the microphones can be connected to the LD6000 as follows The LD6000 BM as a Ground Microphone Connect the LD6000 DA tripod adapter to the base of the LD6000 BM and connect the microphone to the microphone jack see chapter 4 legend item of the LD6000 The LD6000 BM as a Contact Microphone Connect the magnet base to the base of the LD6000 BM and connect the microphone to the microphone jack see chapter 4 legend item of the LD6000 The LD6000 BM as a Probe Microphone Connect the tip of the LD6000 VL t
15. 1000 Press the record button to start measuring Keep the button pressed for the duration of the measuring operation The device will stop measuring when the record button is no longer pressed 50 100 0 IN The display can show a measurement series which is made up of the last ten individual measurements The first measurement is displayed on Position 1 Each further measurement beginning with Position 2 will be placed on an ascending position When Position 10 has been reached the oldest of the ten measurements i e the measurement on Position 1 will be cleared so that the last measurement that was taken last is always on Position 10 The single bars are used to visualise the following information in F amp V mode As is the case in V mode the height of the bar shows the sound amplitude on a sound level scale from 0 to 100 In addition the colour of the bar visualises the frequency range with the highest noise amplitude The brighter the colour the higher the frequency The sound level and frequency are also shown as a number under the bars In addition the sound value that is currently being measured is displayed in the form of a bar The symbol of a waterdrop is used to denote the highest minimum sound level in the measurement series and therefore the point at which a leak is most likely IS Because the measuring values are not determined using a specific mode but only shown in a specific
16. 5 litres Because a standard 50 litre bottle contains 10 000 litres of gas at 200 bar two such bottles of forming gas were required in the above example You should also keep in mind when planning how much gas you will need that in addition you will need a reserve for the gas that escapes at the leak Volumen table of various pipe diameters for calculating gas amounts Pipe diameter in mm VL volume in litres with regard to the length of pipe in metres 40 1 26 50 1 96 60 2 83 80 9 02 100 7 85 125 12 27 150 17 66 200 31 4 250 49 06 300 70 65 18 LD6000 Operating Instructions EN EN LD6000 Operating Instructions 19 TRT BALD6000 WM 01 EN Trotec GmbH amp Co KG Grebbener Str 7 D 52525 Heinsberg Tel 492452962 400 Fax 492452962 200 www trotec com E Mail info trotec com
17. Measuring To change the volume of your headphones before or after measuring navigate in the window to the symbol for selecting the headphone volume activate the symbol and confirm your selection The window for selecting the headphone volume opens The volume that has been selected for your headphones is displayed on a scale from 0 to 100 Turn the dial on the right or touch the touch screen and pull your finger to the volume which you would like to select Press the cancel key to leave the window without changing the volume setting EN LD6000 Operating Instructions 7 Press the dial on the right to confirm the new setting or press the cancel key You can also confirm the setting change by pressing the symbol for the head phone volume on the touch screen A change in volume has no affect on the measuring curve and the current measurement series is not cleared Changing the Volume During Measuring You can change the volume at any time during meas uring by either turning the dial clockwise if you would like to turn up the volume or anti clockwise if you wish to turn down the volume PDI 7 2 Smart Mode 7 2 1 Mode Description The Smart Mode displays a double bar comprising a noise level indicator and the smart indicator for enhanced leak detection The smart indicator is based on a complex calculation and analysis system which includes factors like frequency sound levels and evaluations This algori
18. YTROTEC Combo Leak Detector LD6000 Operating Instructions Table of Contents 1 Safety Instructions 3 2 Intended Use 3 3 Scope of Delivery 3 4 Control Elements and Connecting Ports 4 5 Powering Up and Operating the Device 4 5 1 Microphone Jack and Sensor Port 4 5 1 1 Connecting the Microphones for Acoustic Leak Detection nenne 4 5 1 2 Connecting the Hydrogen Sensor for Trace Gas Detection 5 5 2 Powering On and Off ns cone ara naar 5 6 Navigation and Menu Structure 5 Oe NVO Eee 5 0 2 A nee ar E E era E 5 Co NOD e ue 5 6 4 Settings dca dcd dace anced Gate wedi Gee oe Boe eae anes 5 0 4 1 Tie and Dale poo cone er ran 6 6 4 2 Languages ac kod Ss clad de cr Rida eee he has ak 6 b43 POWER ON TIME suc ang ea 6 044 OCR a a et aa ue 6 6 4 5 Frequency Range 6 6 4 6 Hearing Protection 6 047 TOUCH SION ana mu ca mee aude 6 6 4 8 Clear Memory 6 7 Acoustic Leak Detection 6 7 1 Parameter Settings in Acoustic Modes 7 7 1 1 Adjusting the Sensor Sensitivity 7 7 1 2 Selecting the Filter Presetting r4 7 1 3 Volume Setting nn rigen das een 7 1 25 SO MIA MORE a eng Re rn 8 7 2 1 Mode Description 8 72 2 MODE SPIECHOR zen een 8 7 2 3 Measuring Procedure
19. ce of the dial Cancel key 5 Powering Up and Operating the Device 5 1 Microphone Jack and Sensor Port First place the batteries into the battery compartment of the LD6000 and connect all the components which you require to perform your specific measuring operation Headphones Connect the headphones to the headphone jack of the LD6000 if necessary see chapter 4 legend item Use the supplied LD K headphones only The headphones have been designed specifically for use with the LD6000 and for carrying out acoustic leak detection The state of the art electronics incorporated in the high quality hearing protector capsule ensure optimal results while providing excellent soundproofing qualities Right hand navigation dial This dial has two functions you can either press A or turn B the dual function dial Turn the dial to access menu and setting functions and to specify selected settings Press the dial to confirm selections and settings The navigation dial on the right can also be used to execute a variety of settings which will be dealt with more closely in the following chapters Headphone key Headphone jack Connection for PC cable Screw on battery compartment lid LD6000 H2 hydrogen sensor connecting port Microphone jack 5 1 1 Connecting the Microphones for Acoustic Leak Detection Please be sure to use one of the following microphones only when carrying out acoustic leak detection with
20. continues to contain the water that is leaking from the pipe The sound that is transmitted through the ground is therefore barely audible and is almost impossible to pick up with a ground microphone The sound caused by the leak can be made audible again if compressed air can be fed into the pipe system that is being examined In such a case the com pressed air is fed into the pipe system with a minimal amount of overpressure via a hydrant or house connecting point This combination of water and air generates a sound at the leak that is clearly audible The diagram below shows the influence of the ground formation on the distance that the ground borne sound waves can travel with reference to the leak frequency in metres Low frequency sounds spread out further than high frequency sounds and compact ground conducts the sound to the surface better than ground which is not as compact 160 140 Has Concrete 80 B Clay 60 C Earth 50 Sand 0 Ce Sa 25 Hz 250 Hz 2 500 Hz 15 1 1 2 Structure Borne Sound Structure borne sound oscillations occur when water escapes from a leak with high pressure and at a correspondingly high speed which causes the pipe in question to oscillate The sound that is generated at the point where water is escaping spreads out to all sides of the pipe Small diameter or thin steel pipes will oscillate strongly and the sound that the leak is causing can be picked up at a considerable distance from the leak itself
21. ction with concentration dependent signal optic and acoustic Control Via touch screen keys buttons or dials Amplification 120 dB with low noise factor Input impedance IMQ Filter up to 256 freely selectable for stick and ground microphone Display Colour LCD automatic backlight 480 x 272 pixels Battery check via micro controller Input impedance lt 10 Q Power 4 x batteries type LR14 C 1 5 V up to 14 h in non stop operation SEW INE up to 40 h in normal operation Bayonet microphone sensor Connections 6 3 mm phone jack headphones Protection class IP54 Housing Aluminum powder coated Temperature conditions Operating 5 C to 55 C Storage 25 C to 65 C L 210 x W 160 x H 60 mm 1050 g Technical Data LD6000 H2 hydrogen hand sensor Article Number 3 110 008 111 Dimensions approx Weight approx Reaction sensitivity 1 ppm H2 Measuring range 10 ppm H to 20 000 ppm H Resolution 1 ppm Hs Reaction time 0 55 Design Hand sensor with flexible swan neck length 50 cm and 160 cm connecting cable for LD6000 Temperature conditions Technical Data LD6000 H2 hydrogen ground sensor Article Number 3 110 008 015 Operating 10 C to 60 C Storage 20 C to 60 C Reaction sensitivity 1 ppm H Measuring range 10 ppm H to 20 000 ppm H Resolution 1 ppm H Reaction time 0 55 Ground sensor with two part stick microphone Design length approx 1 m and rubber sleeve approx 200 cm
22. d 8 2 Measuring Procedure dem 24 01 11 17 00 Menu Help Save amp A A 79 SEER 0 500 1000 Press the record button or the record symbol on the display to start ms long term measuring The measurement begins and ends with the preselected times You can interrupt the recording at any time by pressing the pause symbol the record symbol or the record button Continue measuring by pressing the pause symbol the record symbol or the record button To clear the long term measurement series on the display press either the left hand dial and keep pressed for 3 seconds or by pressing the clear symbol on the display 9 Trace Gas Detection The LD6000 is excellently suited for detecting leaks together with the optionally available LD6000 H2 hydrogen sensor and the formation gas type 95 5 which comprises 95 nitrogen and 5 hydrogen To select the trace gas detection activate the symbol mm h for the trace gas detection in the main menu and confirm your selection You will then arrive at the display 9 1 Putting the Device into Operation mm 24 01 11 17 00 Menu Help Save i i i 1000 500 O O LED 0 0 C al BK 0 x As soon as you change to trace gas detection on the display when the hydrogen sensor is connected the device recognises the sensor and warms it up to operating temperature This warm up phase takes approximately
23. e measuring modes that can be used during acoustic leak detection has both a selection of predefined filters as well as a selection of user defined filters which can be configured in the setting window Frequency Range The settings of the high pass filter HP the low pass filter LP and the maximum breadth of the colour spectrum can all be changed Repeat the procedure as described in Time and Date see chapter 6 4 1 to enter the configuration you have selected 6 4 6 Hearing Protection The LD6000 is equipped with an automatic noise level absorber which ensures that the noise requirements according to VBG 121 VBG Association of Institutions for Statutory Accident Insurance and Prevention are met when the LD K head phones included in the scope of delivery are used The noise protection intensity of the headphones can be adapted individually to suit the user The intensity ranges from 0 relatively low to 3 maximum Each of the three stages complies with the requirements as laid down in VBG 121 The configuration corresponds to the procedure for setting the time and date as described in chapter 6 4 1 6 4 7 Touch Screen You can use this setting window to deactivate the touch screen function or to carry out a calibration or performance check Use the dial on the right to navigate to the selection field of your choice and confirm your selection by pressing the dial If on off has been selected you can activate or deactivat
24. e sensor sensitivity To set the sensor sensitivity perform the same steps as described for current measurements in chapter 7 1 1 Selecting the filter presetting To select the filter presetting perform the same steps as described for current measurements in chapter 7 1 2 Adapting the filter and activating the acoustics manually To adapt the filter and activate the acoustics manually perform the same steps as described for current measurements in chapter 7 6 Setting the volume To select the volume for long term measuring perform the same steps as described for current measurements in chapter 7 1 3 In addition the volume function for long term measuring can be deactivated at any time by pressing the headphone key The volume that has been set is not affected by the mute function The mute function mutes the headphones Selecting the time intervals for long term measuring There are four predefined time intervals available for selection 5 15 30 and 60 minutes To select a time interval navigate to the time interval symbol on the display and confirm your selection The window for setting the time interval will open Navigate to the time interval you wish to select by pressing the right hand dial or by touching the touch screen and confirm your selection by pressing the right hand dial or press the cancel key The time scale on the display will now display the time interval that has been selecte
25. e the touch screen function respectively by pressing the dial To leave the setting menu either press the dial or press the cancel key or the door symbol on the screen 6 4 8 Clear Memory You can clear two different memory values in this window setting Clear Memory clears all the values that have been saved into the device Clear Parameter Memory clears all the user defined configurations for the high pass filter low pass filter and the maximum breadth of the frequency spectrum in the window setting Frequency Range see chapter 6 4 5 You can also use the touch screen to clear the memory or use the dial on the right to navigate to the selection field you have chosen before pressing the dial to confirm your choice A tick symbol will appear to acknowledge that the memory has been cleared To leave the setting menu either press the dial or press the cancel key or the door symbol on the screen 7 Acoustic Leak Detection In order to be able to carry out acoustic leak detection with the LD6000 first activate the symbol for your acoustic leak detection measuring operation in the main menu and confirm your selection How to get to the display IS The first selected mode is the predefined smart mode There are two other modes available in addition to the smart mode a F amp V mode frequency and volume and a V mode sound level These measuring modes will be described in more detail in three later chapters 7 2 to 7 4
26. ed It might then take several minutes or even hours for the gas to reach the surface This depends on the leak and the type of ground and surface It takes approxi mately 60 minutes for the gas to reach the surface when ground in green areas for example is slightly moist and the pipes are circa 1 5 m under the ground You have to follow the path of the pipes repeatedly until the gas escapes through the surface Then look for the highest concentration within the area where the gas has escaped and mark this point to show that this is where the leak is 15 2 3 Determining Correct Quantities Using Experience Gained in the Field If a pressure test with water has already been carried out on the pipe then the pressure at which water no longer escapes through the leak can be used to calculate the quantity of gas that is needed If not the operating pressure can be used On this basis and with the help of the volume table below it is possible to calcu late the maximum amount of forming gas that is required to locate the leak Formula G VLx Lx D G Amount of gas with regard to inspection pressure L Volume in litres with regard to the length of pipe in metres L Length of pipe m Inspection pressure bar Example A DN 125 pipe is 300 metres long and is to be filled with a pressure of 5 bar Volume per metre x length 12 27 litres x 300 metres 3 681 litres at 1 bar pressure At 5 bar pressure 3681 litres x 5 bar 18 40
27. ed Action You cannot commence measuring the cross symbol above the function key does not disappear the sensor does not warm up No or hardly any display of existing gas concentrations Reaction time too long 1 The sensor cable has not been connected properly Port Jack or plug defective Cable defective Sensor defective Sensor was connected to the unit in a room with existing gas concentrations Sensor defective Sensor is not working properly e Check the connections between the connected H2 sensor and the LD6000 e Replace the sensor with a spare sensor if possible or use the sensor from a second LD6000 to check to see if the sensor is working properly e Check the connections between the connected H2 sensor and the LD6000 e Replace the sensor with a spare sensor if possible or use the sensor from a second LD6000 to check to see if the sensor is working properly e Check the connections between the connected H2 sensor and the LD6000 e Replace the sensor with a spare sensor if possible or use the sensor from a second LD6000 to check to see if the sensor is working properly Please contact our Customer Support Centre Leave the room and go somewhere where existing hydrogen levels are normal e g out in the open Power up the unit AGAIN and then return to the room which you had previously left Please contact our Customer Support Centre Please contact our Customer Support Centre
28. ed out in Zone 1 the digital display now shows a relative measured value of 000 and an absolute measured value of 200 10 i A new measurement is carried out in Zone 2 The digital display now shows a relative measured value of 100 and an absolute measured value of 300 300 i i Then measuring is carried out in Zone 3 After the measurement has been carried out the digital display only shows the absolute measured value 100 and no measuring value 000 100 Important The defined alarm thresholds are always set with regard to the relative measured value An alarm threshold of 150 digits as shown in the example above would only trigger a signal after the first measurement in Zone 1 before zero calibration was carried out even though the absolute measured value that was measured in Zone 1 after zero calibration and also in Zone 2 was above the alarm threshold 9 6 Clearing the Measurement Series Clearing Zero Calibration You can use the clear function to clear both the measurement series and the zero Calibration in trace gas mode Either of the two cannot be cleared individually You can either clear both of them or neither of them Press the left hand dial to clear both the zero calibration J and the current measurement series Both memory Sy parameters are now cleared There are now no measuring values and no reference value To save measurement series permanently into the memory follow the ins
29. eld A and the red high pass filter bar B in the frequency band To change the frequency value of the high pass filter turn the right hand dial or touch the touch screen and pull the high pass filter bar to the position where you would like it to be qm 24 01 11 17 00 Menu Help Save 1 2 3 4 5 6 7 8 9 10 LL ll nt 4 ODO ee Aa 50 80 ror a Z 0 500 1000 To change the frequency value of the low pass filter press the right hand dial once The low pass filter is now active This is indicated by the red high pass filter value field A and the red high pass filter bar B in the frequency band 50 100 0 To set the frequency value of the high pass filter turn the right hand dial or touch the touch screen and pull the high pass filter bar to the position where you would like it to be When working in the field the setting for the low pass filter is ideal when all the high frequency sounds lie within the selected range and the high pass filter is set so that the bottom left hand sector of the selection box is on the right hand sloping flank of the biggest part of the spectrum Wrong filter adaptation Press the cancel key to leave the window Right filter adaptation Acoustic activation during filter adaptation The LD6000 is equipped with a function which allows you to activate the acoustics while the filter is being adapted This function can be turned on or off by pressing the headphone key The
30. erator has proved invaluable when working with both non metallic and metallic pipes which because of transformer stations or high tension underground power cables cannot be detected using conventional detection methods 15 2 Leak Detection with Trace Gas 15 2 1 Functioning Principle The optionally available LD6000 H2 hydrogen hand sensor is excellently suited for trace gas detection in combination with the LD6000 In such cases the pipe that is to undergo inspection is flooded with forming gas 95 5 95 nitrogen 5 hydrogen Because of its specific structure hydrogen is able to permeate almost all materials like earth concrete floor tiles etc It can then be easily traced at the surface with the LD6000 and the connected hydrogen sensor Forming gas 95 5 is neither toxic nor flammable This means that it can be considered harmless and even used in fire protected industrial areas You must however always make sure that you you follow the rules and regulations that apply to such areas 15 2 2 How to Carry Out Leak Detection with a Forming Gas After the pipe that is to undergo inspection has been emptied the gas bottle is connected and the pipe is then filled slowly from one end until the hydrogen sensor at the other end of the pipe or at a control point along the pipe signals that gas concentrations have been detected Then the second end is sealed and the pressure is gradually increased until the inspection pressure has been reach
31. et closer to an area with a higher hydrogen concentration The value decreases again when you move away from this area or enter adjoining areas with lower hydrogen concentrations There is a hydrogen concentration of 250 digits on the display as shown in the example Activating the Acoustic Feedback As it may become difficult to keep an eye on the display the whole time while trying to detect the direction which the biggest trace gas increase is coming from the LD6000 is also equipped with an acoustic feedback to help you during leak detection The LD6000 is equipped with a signal display which is connected to a piezo element and additionally able to transmit a signal tone to the connected LD K headphones The acoustic feedback is initially set to deactivated To activate the acoustic feedback navigate to the measuring tone symbol with the right hand dial and activate the symbol by either pressing the dial or by directly touching the touch screen where the measuring tone symbol is When the acoustic feedback is activated the sound is emitted via both the connected headphones as well as the internal piezo element The sound is emitted in the same volume and the same frequency via the piezo element The tone sequence increases when the measuring values in Crease and decreases when the measuring values decrease The sound is emitted in the same volume as a continuous tone via the headphones The frequency depends on the mea
32. hat in the product description All due care has been taken in compiling this document We accept no liability for errors or omissions TROTEC LD6000 Operating Instructions EN This measuring device was designed and manufactured in line with the latest technological advancements and complies with the requirements as laid down in existing European and national guidelines Conformity has been certified The relevant declarations and documents are in the manufacturer s possession As the user you must read and adhere to the following safety instructions in order to ensure that this condition is maintained and that no danger results from the use of this device 1 Safety Instructions We do not accept any liability for any damages which might occur as a result of improper use or the non observance of these instructions The guarantee expires with immediate effect in such cases These instructions must be read in full before the device is put into operation for the first time For reasons of safety and CE compliance you may on no account carry out any changes or modifications on either the device itself or any other components which may be used in connection with this measuring device The following instructions must be adhered to before the device is taken into use e Do NOT carry out measurements on live components e Please observe the measuring range of the measuring sensor e Please observe the operating and storage conditions
33. ht to get to the help text you need Press the door symbol within the help sector to navigate back out of the help sector step by step Return to the Help main page from a Help text by pressing the door symbol Press the door symbol to return to the main menu from the Help main page n Press the cancel key to leave the help sector immediately You will then return to the main menu 6 4 Settings mm 24 01 11 17 00 Menu Help Date Time Language Power off time Backlight vig AY gt y Fe Freq range Ear protection Touch screen Level WwW 3 DTROTEC You can reach the menu Settings via the Settings symbol in the main menu Navigate to the settings you wish to select and carry out your selection in order to perform the following configurations Clear Memory EN LD6000 Operating Instructions 5 6 4 1 Time and Date Use the dial on the right to navigate to the selection field of your choice The selection field you have chosen will be marked with a red border Press the dial on the right to confirm your selection The field you have selected is now active and highlighted in yellow Press the dial again or press the cancel key to deactivate the field you have selected When the selection field is active you can enter a value by turning the dial on the right and pressing the dial to confirm that the value you have entered is correct You can now navigate to the next selection field To enter the value
34. ice Use a slightly moist lint free cloth only to clean the main unit Do NOT use any detergents or cleaning fluids Use clean clear water only We recommend that you remove the batteries from the battery compartment when you are not planning on using your measuring device for a longer period LD6000 H2 hydrogen sensor The measuring tip of the hydrogen hand sensor is equipped with a brass coloured hexagonal protection cap sinter filter which is designed to protect the sensor system Use compressed air to remove any dirt particles which might happen to settle on the sinter filter Unscrew the sinter filter from the measuring tip and direct the jet of compressed air from behind from the direction of the inner thread of the filter towards the filter element to remove any dirt particles from the filter element Replace the sinter filter back on the sensor tip and screw back on The swan neck hydrogen hand sensor can be cleaned with a slightly moist lint free cloth if necessary 14 Technical Data Technical Data LD6000 Article Number 3 110 008 010 Acoustic Leak Detection F amp V smart long term Operation Mode measuring and trace gas leak detection Measuring modes for minimum levels averaged levels pulse wave measurements simultaneous F amp V Measuring functions and analysis logging function memory preference for device functions manual filter settings sound level overmodulation protection trace gas dete
35. in the measurement series and therefore the point at which a leak is most likely IS Because the measuring values determined during leak detection are not determined using a specific mode but only shown in a specific mode measuring modes can be changed between individual measurements and the measurements that were taken prior to the mode change can be either analysed or measuring can be continued The measurement series remains unaffected and is not cleared 8 LD6000 Operating Instructions EN 7 3 F amp V Mode Frequency and Volume 7 3 1 Mode Description The sound amplitude of the minimum measured value bar height and the frequency range with the highest sound amplitude bar colour are displayed as a bar in F amp V mode 7 3 2 Mode Selection m 24 01 11 17 00 Menu Help Save 100 i LO 0 a A 0 600 1200 h The measuring mode symbol on the display shows which mode has been set If the F amp V mode has not already been set navigate to the measuring mode symbol 0 activate the symbol and confirm your selection The window for selecting the measuring mode will then open To set the F amp V mode navigate to the list item F amp V mode and confirm your selection by pressing the right hand dial The window will close and the F amp V mode symbol will be shown 7 3 3 Measuring Procedure dem 24 01 11 17 00 Menu Help Save 1 2 3 4 5 E 3 o EAE O La oO 0 0 Uoo F 4 0 0 500
36. ition 2 will be placed on an ascending position When Position 10 has been reached the oldest of the ten measurements i e the measurement on Position 1 will be cleared so that the last measurement that was taken last is always on Position 10 EN LD6000 Operating Instructions 9 When in V mode the height of the bar shows the noise amplitude of the measured minimum value on a sound level scale from 0 to 100 In addition the value that is being currently measured is displayed on the bar The symbol of a waterdrop 2 is used to denote the highest minimum sound level in the measurement series and therefore the point at which a leak is most likely IS Because the measuring values during leak detection are not determined using a specific mode but only shown in a specific mode measuring modes can be changed between individual measure ments and the measurements that were taken prior to the mode change can be either analysed or measuring can be continued The measurement series remains unaffected and is not cleared 7 5 Clear Current Measurement Series As many as 10 single measurements can be carried out with the LD6000 and used as a measurement series which can then be seen on the display This series remains in the memory even when the device is powered off unless certain parameters are changed This function is of a particular advantage in the field as this means that the last measuring value can then be carried ove
37. n Important The current measurement series will be cleared when any changes are carried out to the sensitivity settings The sensitivity value you have selected will either be displayed as a number or in the form of a tachometer in the symbol for the sensitivity setting 7 1 2 Selecting the Filter Presetting dem 24 01 11 17 00 Menu Help Save a A R R 7 a Q 50 100 0 iz esi x 0 iz 0 1000 You can select one of three filters when carrying out acoustic leak detection Each of the filters can be changed individually during measuring To select one of the predefined filter settings navigate to the filter mode symbol on the display activate the symbol and confirm your selection The window for the filter presetting selection opens There are three presettings to choose from e Fittings amp There is a predefined frequency range from 0 to 2 000 Hz with a 200 Hz high pass filter and an 800 Hz low pass filter which are ideal for checking the status of fittings and hydrants e Ground There is a predefined frequency range from 0 to 1 000 Hz with a 50 Hz high pass filter and a 400 Hz low pass filter which are ideal for checking the status of pipe runs This is the factory default setting and therefore the setting when the device is put into operation for the first time User This presetting uses the filter range which you the user defined according to your own specific filter preferences
38. o the base of the LD6000 BM either with or without the extension piece and connect the microphone to the microphone jack see chapter 4 legend item of the LD6000 LD6000 BMW Ground Microphone Connect the LD6000 DM tripod magnet to the base of the LD6000 BMW if necessary Connect the LD6000 VK connecting cable to the microphone and plug the microphone into the microphone jack see chapter 4 legend item of the LD6000 5 1 2 Connecting the Hydrogen Sensor for Trace Gas Detection The LD6000 H2 hydrogen sensor can be connected to the LD6000 to carry out non destructive leak detection in systems that have previously been flooded with trace gas Connect the sensor to the hydrogen sensor port see chapter 4 legend item of the LD6000 You will find instructions on how to carry out measuring in chapter 9 and further practical information guidelines regarding the use of trace gas in leak detection in chapter 15 2 5 2 Powering On and Off Press the ON Off key to power on see chapter 4 legend item The start screen appears and changes to the main menu as soon as the measuring device is ready for use Press the ON Off key and hold for approx 3 seconds to power off see chapter 4 legend item 6 Navigation and Menu Structure 6 1 Navigation The LD6000 has a number of menu and selection boxes which you can select by either using the touch screen or the navigation dial on the right When using the touch screen simply
39. or the fifth of the last previous 5 measurements e Start Stop symbol to start and stop a measurement e Perform zero calibration e Switch the measuring tone on and off e Define the alarm threshold e Record symbol for the measurement operation The functions and setting possibilities of these parameters will be explained in detail in the following chapters 9 3 Normal Measuring with Acoustic Feedback IS Information on the displayed values The LD6000 H2 hydrogen sensor is able to detect highly resolved hydrogen concentrations from 10 to 20 000 ppm The LD6000 displays the detected hydrogen concentrations as digits but without an accompanying value in a range from 0 to 1 000 digits Important The correlation from display and H concentration is not linear but logarithmic The displayed digital value does not automatically correspond with the ppm value dem 24 01 11 17 00 Menu Help Save 500 1000 UN 500 0 0 Qe Starting Measuring Press the start stop symbol on the touch screen or press the record key to begin a measurement The measurement and will be continued until one of the keys is pressed to discontinue measuring A pulsating record symbol indicates that measuring is being carried out The current measuring value is either displayed as a number on the digital dis play or as both as a number and a bar on the right hand red bar display 6 The display value increases if you g
40. ortant to ensure that no value exceeds the range on the display otherwise you will be unable to tell what the actual value was The fact that the measuring values can be saved into the internal memory is an added benefit as it can then be carried over to the place where measuring is to be carried out next This method allows you to determine the section of pipe with the highest sound intensity without changing the control settings The next leak detection stage can then be carried out on this particular section of pipe over ground EN LD6000 Operating Instructions 17 15 1 2 2 Pinpointing the Leak Using a Ground Microphone If you have managed to detect a defective section of pipe using the stick microphone you can use the ground microphone to pinpoint the leak Always make sure that the distance between any two points that you have selected for the ground microphone is not too far apart as you could otherwise end up missing the leak As a rule the distance apart should not be more than one metre 15 1 2 3 Pipe Detection with Pulse Wave Generator The LD6000 can also be used in combination with the optionally available LD PULS pulse wave generator to locate the course of pipes The pulse generator generates up to 60 oscillations per minute These oscillations can be carried along the pipes up to a distance of 600 metres in especially favourable con ditions They can then be picked up by the ground microphone The LD PULS pulse gen
41. r to the next measuring point where the measurement series can then be continued It must be pointed out that the measurement series will be cleared as soon as the sensor sensitivity settings or the predefined filter settings are changed Follow the instructions in chapter 10 to find out more on how the measurement series can be saved permanently To clear the individual measurements or the measurement series shown on the display press the dial on the left and keep pressed for 3 seconds All 10 positions on the dis play have now been cleared and are empty 7 6 Manual Filter Adjustment and Acoustic Activation mm 24 01 11 17 00 Menu Help Save 1 100 i LO 0 ror A A h 0 500 1000 ho You can change the preselected filter frequencies at any time between individual measurements in each of the three acoustic leak detection measuring modes Navigate to the frequency range display activate the display and confirm your selection The window for the acoustic filter adaption will then open The high pass filter the low pass filter the frequency spectrum and the status symbol for the acoustic activation are all presented on the display The frequency spectrum is also presented as a colour gradient Dark colours indicate low frequency sounds and bright colours indicate high frequency sounds The preset high pass filter is active This is indicated by the red high pass filter value fi
42. sta tus symbol for the acoustic activation function in the window shows the current function status When this function is active the sound from the microphone is passed on through to the headphones while the filter is being adapted This means that you can either enter numerical values to set the limits for the frequency ranges you wish to select or you can set the limits using the acoustic method 8 Acoustic Long Term Measuring You can carry out long term measuring with the LD6000 in order to determine over a longer period whether a certain sound can be attributed to either a leak or a sound that is coming from the surrounding area noises generated by a canal pump etc To select the acoustic long term measuring mode activate the symbol for acoustic long term measuring in the main menu and confirm your selection You will then arrive at the display 10 LD6000 Operating Instructions EN 8 1 Parameter Settings for Acoustic Long Term Measuring dem 24 01 11 17 00 Menu Help Save NN 0 500 1000 You can set the following parameters and carry out the following actions on the display e Set the sensor sensitivity e Select the filter presetting e Adapt the filter and activate the acoustics manually e Set the volume e Set time intervals for long term measuring e Start long term measuring chapter 8 2 e Clear the display chapter 8 2 e Stop continue long term measuring chapter 8 2 Setting th
43. suring value The frequency increases when the measuring values increase the tone becomes higher and decreases when the measuring values decrease the tone becomes higher 12 LD6000 Operating Instructions EN 9 4 Defining Alarm Thresholds In order to allow you to identify certain hydrogen concentrations more easily the LD6000 is equipped with a permanent alarm function with alarm thresholds that can be configured individually The factory setting is 500 digits An acoustic alarm sounds when the alarm threshold is exceeded The warning tone sounds different than the standard feedback signal When the alarm tone sounds via the piezo element the signal changes constantly in a tone sequence with long tones in short intervals When the alarm tone sounds via the headphones the continuous tone is emitted without interruption with maximum frequency when the predefined alarm thresholds have been exceeded qm 24 01 11 17 00 Menu Help Save Digits 0 200 400 600 800 1000 a of We o di To set the alarm threshold which you wish to select navigate in the display window to the symbol for the threshold setting activate the symbol and confirm your selection i i 500 0 The window for setting the alarm threshold will then open The current alarm threshold is displayed on a step scale ranging from 0 to 1 000 digits You can select a new threshold value by either turning the dial on the right or placing a finger on
44. t forms at the leak This means that leaks become less audible if the pressure in the pipe is lower than 3 bar If the pressure is lower than 1 5 bar then a leak cannot be heard even when in it is in the close vicinity 15 1 2 Schematic Leak Detection In order to Keep costs down it often makes sense to adopt a systematic approach to carrying out leak detection This is especially true when water pipes are concerned for example The first thing you need to know is the course of the pipe You will also need to differentiate clearly between the preliminary leak detection stage and the stage which involves pinpointing the actual leak If this first stage were not to be performed then the whole length of the pipe would have to be inspected order to determine the exact spot where the leak is 15 1 2 1 Narrowing Down the Leak Using a Stick Microphone You can narrow down the position of a leak by inspecting the parts of the pipe system that you are able to access with the probe tip of the stick microphone Particular attention must be paid the type of sound that is recorded leaks generate a dull muffled sound and valves produce a brighter sharper sound Both sounds are very helpful when it comes to narrowing down the position of a leak but it is important to remember that similar sounds like that of water flowing through the pipe can be generated when water is taken from the pipe via a tap for example When narrowing down the leak it is imp
45. ted 17 15 1 1 1 Ground Borne Sound 17 15 1 1 2 Structure Borne Sound 17 15 1 1 3 Current Induced Sound 17 15 1 1 4 Interference Factors 17 15 1 2 Schematic Leak Detection 17 15 1 2 1 Narrowing Down the Leak Using a Stick Microphone 17 15 1 2 2 Pinpointing the Leak Using a Ground Microphone 18 15 1 2 3 Pipe Detection with Pulse Wave Generator 18 15 2 Leak Detection with Trace Gas 18 15 2 1 Functioning Principle 18 15 2 2 How to Carry Out Leak Detection with a Forming Gas 18 15 2 3 Determining Correct Quantities Using Experience Gained in the Field 18 This publication replaces all previous publications No part of this publication may be reproduced processed using electronic systems replicated or distributed in any way without prior written authorisation by us Subject to technical modifications All rights reserved Names of goods are used without guarantee of free usage and used for the most part according to the manufacturers syntax The names of goods used are registered and should be considered as such We reserve the right to modify the design in the interest of ongoing product improvement such as shape and colour modifications The scope of delivery may vary from t
46. the touch screen and pulling it to the value which you wish to select Press the cancel key to leave the window without changing the threshold value Press the dial on the right to confirm your selection or press the cancel key 9 5 Measuring with Zero Calibration It may become necessary to use the zero calibration function to define a reference value during measuring so that fluctuating hydrogen concentrations at different measuring points can be defined more clearly As soon as a reference value has been defined a value that is relative to the newly defined reference value appears on the display This can be of particular advantage when sections of pipe are measured in areas with high hydrogen concentrations because it allows you to narrow down the position of the leak on a step by step basis 0 To determine a reference value navigate to the zero calibration symbol with the right hand dial and activate the symbol by pressing the dial You can also activate the zero calibration symbol by touching the symbol on touch Screen Important The current measurement series is cleared when zero calibration is performed When you perform a zero calibration you are defining the existing hydrogen concentration i e the current measuring value as the new reference value This in turn changes the displayed measurement value when compared to the normal measurement with zero calibration The digit display now shows two values the relati
47. thm has been tried and tested and is especially effective when background noise levels are high and the sound emitted by the leak is very quiet 7 2 2 Mode Selection m 24 01 11 17 00 Menu Help Save 100 50 f F amp V mode A V mode A a 0 600 1200 The measuring mode symbol on the display shows which mode has been set 0 ll If the smart mode has not already been set navigate to the measuring mode symbol activate the symbol and confirm your selection The window for selecting the measuring mode will then open To set the smart mode navigate to the list item smart mode and confirm your selection by pressing the right hand dial The window will close and the smart mode symbol will be shown 7 2 3 Measuring Procedure dm 24 01 11 17 00 Menu Help Save 100 50 0 Press the record button to start measuring Keep the button pressed for the duration of the measuring operation The device will stop measuring when the record button is no longer pressed The display can show a measurement series which is made up of the last ten individual measurements The first measurement is displayed on Position 1 Each further measurement beginning with Position 2 will be placed on an ascending position When Position 10 has been reached the oldest of the ten measurements i e the measurement on Position 1 will be cleared so that the last measurement that was taken last is always on Posi
48. tion 10 The double bar can be used to visualise the following information in smart mode The right hand thin bar shows the sound amplitude on a sound level scale from 0 to 100 The grey bar represents the minimum measured value i e the quietest sound that is relevant for the detection of the leak This value is also displayed as a number below the bar In addition the sound value that is currently being measured is displayed as such on the bar IS The value displayed on the bar is of great help for example when used in combination with the LD PULS pulse wave genera tor during leak detection In this case you do not want to analyse the quietest sound you want to pick up the impulse generated by the LD PULS as clearly as possible The left hand broad bar is the smart indicator The smart indicator is based on a complex set of calculations and analysis methods see chapter 7 2 1 The higher the smart indicator value the more reliable the information on the leak The smart indicator bar also displays the colour of the frequency which was used for the calculation that is required to provide an indication on the whereabouts of the leak According to the rule of thumb the closer the leak the higher the smart indicator bar value and the lighter the colour The smart indicator bar value is also displayed as a number next to the actual bar O The symbol of a waterdrop O is used to denote the highest minimum sound level
49. to 2 000 Hz and generate a clearly audible sound by scratching a surface or turning on a radio for example If the action you have carried out causes the numerical or bar display to change and these sounds can be clearly heard in your headphones then you can be sure that the headphones and microphone are working properly Now carry out the measurement again and adapt the frequency range to suit the measuring operation e Check the connections between the connected sound receiver and the LD6000 e Replace the cable with a spare cable if possible or use the cable from a second LD6000 to check to see if the sound receiver is working properly e Check the connections between the connected headphones and the LD6000 e Connect a spare pair of headphones which you may have or another pair from a second LD6000 to the unit and check the function again If the actions that you have carried out have not been successful then go to Clear memory in the menu and clear the parameter memory If you can still not hear anything over the headphones then please contact our Customer Support Centre Replace the batteries inside your unit with new ones of the same high quality and type Please contact our Customer Support Centre Go to the menu item Settings and increase the display brightness Replace the batteries inside your unit with new ones of the same high quality and type Please contact our Customer Support Centre Recommend
50. tructions as described in chapter 10 EN LD6000 Operating Instructions 13 10 Saving and Loading Measuring Data Any measurement reading and any measurement series can be saved to the internal memory of the LD6000 permanently and either called up at a later point or transferred to your PC The menu item save is only visible when you are in a measuring mode To save a measurement or a measurement series into the memory navigate to the menu item save with the right hand dial and press the dial to confirm your selection You can also use the touch screen to select the memory item save The display now changes to the memory page Saving Measuring Data qm 24 01 11 17 00 Menu Help Select memory To save your measuring data navigate to the display symbol Save Measuring Value and confirm your selection by pressing the right hand dial You can also confirm your selection directly by pressing the symbol Save Measuring Value on the touch screen The measuring values can then be saved to any memory space you wish Turn the right hand dial to navigate to 1 of the 20 memory spaces and confirm your selection by pressing the display symbol Save Measuring Value The measuring value is now on the memory space which you previously selected You can navigate to memory spaces outside the touch screen display by touching the navigation symbols You can either leave the memory page by pressing the cancel key or the
51. ve measured value relative to the defined reference value 000 display at the point of zero calibration as large digits in the middle of the digit display and the measured absolute meas ured value as reference value when zero calibration was carried out in the lower right hand area of the digital display The displayed value changes as follows when the hydrogen concentration increases the relative measured value shows the increasing values in relation to the defined reference value The absolute measured value shows the actual existing hydrogen concentration The relative measured value is not only displayed on the digital display but also on the red bar display as well as on the numerical display below If the hydrogen concentration sinks below the defined reference value the displayed relative measured value no longer changes 000 but the absolute measured value still displays the existing hydrogen concentration Here an example to explain how this works There are different hydrogen concentrations in three fictive adjoining zones The concentration in Zone 1 is 200 digits the concentration in Zone 2 is 300 digits the concentration in Zone 3 is 100 digits 200 000 200 First measuring is carried out in Zone 1 The measured value on the display is 200 digits Now a zero calibration is carried out in Zone 1 and the existing hydrogen concentration 200 digits is defined as the reference value When a second measurement is carri
52. via the touch screen first press your finger against the selection field which you wish to activate and then enter the value using the number pad Press OK to confirm that the value you have entered is correct and press DEL to clear the value Press the cancel key or the door symbol on the screen to leave the setting menu 6 4 2 Languages You can select from one of several display languages Scroll down to the language you wish to select and press the dial on the right to conform your selection Press the cancel key or the door symbol on the screen to leave the setting menu 6 4 3 Power Off Time You can conserve battery power by selecting a time between 1 and 60 minutes after which the device then automatically powers off when not in use Repeat the procedure as described in Time and Date see chapter 6 4 1 to enter the length of time you have selected 6 4 4 Backlight The brightness of the display can be adjusted from 0 to 100 to suit your individual requirements There is also a scale with three individual colour seg ments which show you just how much battery power the brightness setting you have selected consumes The batteries will last longest when the scale is green and used up fastest when the scale is red Turn the dial on the right to increase or dim the brightness and leave the menu by either pressing the dial or by pressing the cancel key or the door symbol on your screen 6 4 5 Frequency Range Each of th
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