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Manual - FUJI TECOM INC.

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1. POWER SUPPLY POWER SWITCH COMPANY LOGO 40 1 TlE C O M CIHIA NIGIE Bla lrir x Lic 2 5 o o SELF CHECKING Niolw DII ANSI MG s E N s o R gt gt gt gt l gt gt gt gt gt gt gt gt gt l gt gt gt ERROR N OIN C ONNINIEICIT TIONN GAIN CONTROL SELECT ADJUST SWITCH S EINIS lA D J UI SIT x slEIN s A b J U s T x AUT ol 7 MAIN UA L A U TIO MIAIN UIAIL ENTER SWITCH gt slEiN s A p J U s T x L m m JIH GOB EERTIGN SELECT ADJUST SWITCH X20 LEVELS SAR x AIUIT O AIA OLY x O O STANDS FOR VOLTAGE x A STANDS FOR GAIN LEVEL Y Nt SNe FORG LIEIVIETL x AINIUIAIL OJO V ENTER SWITCH FILTER SETTING SELECT ADJUST SWITCH x Flr IL TIEIR x SID TH RU sl l THRU SELECT ADJUST SWITCH s EINI s A b u u s v x 51 ADJUST x lalulTio MIA NIU AIL UT lo MIA ENTER SWITCH MEMBRANE SWITCH 1 POWER SWITCH ON OFF SE MS 2 ENTER SWITCH LI 3 SELECT ADJUST SWITCH gt lt XBY SELECT ADJUST SWITCH 4 SELECT SWITCH 5 SPEAKER TOTAL 5 ITEMS ENTER SWITCH xt MARK x APPEARS BACK LITE IS ON One way rule is used to move in the menus To return to the previous screen cycle repeat the screen change process To change and c
2. Q Leak position Pipe length 4 3 False Leak Noise When the blue and red pick ups detect other noise than leak noise the correlator will identify the noise source as leak position and display the data on the LCD When the correlator reports the leakage you should check whether the pipe is actually embedded and has leakage by means of another water leak detection device bowling and investigation False leak noises include the following items 1 Friction noise between flowing water and pipe 2 Noise generated from sewage 3 Noise generated from flowing water 4 Mechanical noise 22 4 4 Preparations 4 4 Preparations 1 Radio mode Leak position Pipe length Insert battery boxes into the main unit and pre amplifiers Mount the receiving antenna to main unit Plug pick ups in the pre amplifiers respectively f you do not connect the pick up sensor an error message No sensor connection appears when the pre amplifier is turned on Turn on the main unit and pre amplifiers Note The two pick ups must have the same specifications The standard pick up cannot be used together with the pick up for VP pipe option 23 4 4 Preparations 2 Cable mo
3. Leak position lt D The noise generated from the leak position is transmitted to both the pick ups f the noise is transmitted to only one pick up the leak position cannot be identified In such the case try to reduce the distance between pick ups The existence of leak noise must have been identified based on the pre investigation The material of the target pipe is identified The reason is that the sound velocity propagation speed of the leak noise depends on the pipe material The bore of the target pipe is identified The reason is that the sound velocity propagation speed of the leak noise depends on the bore 4 The pipe length between pick ups is identified 25 4 5 Preparation at Site 2 Installation of pick ups D The candidate pick up mount positions include fire hydrant gate valve and meter Determine the mount positions and install the pick ups Since the pick up is completely waterproof it can be immersed into the water According to Section 3 4 Inspection of Pre amplifiers check the signals from each pick up reach the appropriate pre amplifier Check the mount positions and pick up magnets are free from contaminants such as mud The contaminants may prevent correct leak detection When several leak positions exist on the same pipe including branch pipe determine the pick up mount positio
4. key This allows you to enter characters After you complete entering the note and return to the main menu with the Escape key the note will automatically be stored When the main unit 15 turned off on this memo screen the memo will be erased When the Delete key is pressed on this memo screen all the data being displayed on the screen will be deleted 9 HELP gt When 9 HELP is selected from the main menu the screen shown left appears This screen contains descriptions about keys and menus You should use this menu when you are not confident on how to operate the equipment on site The next paragraph describes the contents SS TTI SI Mena noes SHH ee 0 2 oe 4 5 B 12 8 9 40 4 7 Menu on Main Unit Help menu list KEY FUNCTION 0 9 Enters numerical values or selects a menu Enters a decimal point Enter Confirms the input Escape Returns to the previous screen Delete Erases the numerical values input CURSOR Moves the cursor or selects the item Monitor Changes the headphone output Light Turns on off the backlight MAIN MENU 0 STATUS SETUP Specifies the Td range filters and calendar and time 0 0 Td Range Setup Selects automatic or manual setup When the automatic mode is selected the Td range is automatically set based on the pipe conditions When the manual mode is selected you should select the Td range from the table 0 1 Filter Se
5. TdMAx 74 9ms Total 2 CORRELATION 100 00 02704718 11 19 05 INPUT IZE LENGTH Eoia amp 1 0 DATA After 1 PIPE DATA SETUP is selected from the main menu the screen shown left appears This screen contains the previously set values You can enter the material bore and length of the pipe Select 0 PIPE DATA INPUT A part of the pipe material list appears at the bottom of the screen as shown left Move up or down the cursor with the up or down button of the CURSOR key to find and select the material number corres ponding to the embedded pipe After the material is confirmed the cursor appears on the bore A part of the bore list appears at the bottom of the Screen as seen in the material Move up or down the cursor with the up or down button of the CURSOR key to find and select the bore number 33 4 7 Menu on Main Unit 02 04 18 11 18 43 After the confirmation the cursor appears on the length NPUT Enter the pipe length with the numeric keys When you intend to measure multiple pipes enter the parameters to and following fields one after another TdMAM O Oms Total 0 00m 1 0 2 PIPE LENGTH LENGTH 1 PIPE DATA EDIT You can change or add the pipe data For the data input see the previous paragraph 2 LEAK POSITION DETECT This function will be discussed in the next paragraph 2 CORRELATION 34 4 7 Menu on Main Unit 2 CORRELA
6. STATUS SETUP 1 FILTER SETUP 1 MANUAL SETUP 2 NOTCH FILTER you can select the notch filter setting from OFF 50 Hz and 60 Hz OFF is the normal setting The notch filter setting can be selected only in the manual mode The following paragraph describes filter types In addition to high pass or low pass filter which cuts the frequency components above or below the certain level there are various filters such as band pass filter BPF that passes a certain frequency band band rejection filter BRF that does not pass a certain frequency band to some extent this filter does not remove the relevant frequency band completely and therefore it is not called band cut filter notch filter NF that is one type of the band rejection filter and handles the narrower band and comb filter that is an aggregation of multiple notch filters Sound Sound Sound volume volume volume Ow Frequency High Low Frequency High Low Frequency High High pass filter Low pass filter Band pass filter Sound volume LOW Frequency High Original frequency characteristics Sound Sound Sound volume volume volume ow Frequency High Low Frequency High Low Frequency High Band rejection filter Notch filter Comb filter 57 5 8 Manual Calculation of Sound Velocity As shown above the notch filter cuts the components in a certain frequency band Although multiple notch filters are combined in this leak detector and thus it may be a
7. or all deletes the data saved 7 NOISE RECORDING The leak noise measured with the pick ups is recorded to the internal memory This data processing menu records replays deletes or all deletes the data The recording time is about 16 seconds for one data set Up to four data sets can be recorded 8 MEMO You can enter up to 227 characters showing necessary information for example site situation Only alphanumeric and basic symbols can be used 9 HELP When this menu is selected descriptions about keys and menus appear on the screen The data save function will be discussed in Chapter 5 Practice in detail 30 4 7 Menu on Main Unit 0 STATUS SETUP gt ann 02 04 18 11 09 45 When 0 STATUS SETUP is selected from the main 0 5 TAT US E ETUP menu the screen shown left appears This screen contains the previously set values UP USTMENT 0 Td RANGE SETUP S 02 04 18 11 10 38 O 0 Td RANGE SETUP 0 AUTO 1 MANUAL TE Se fe 02704718 11 11 11 Tad RANGE MANUAL 2 8 5 DooDoo A ccoccoccocsis c O0 J4 n25 1 5 5 5 5 1 in I I I I I You can specify the Td range delay time Two modes automatic and manual are available and the automatic mode has already been selected as shipping default Normally you should use the automatic mode When the manual mode is selected TdMax is displayed in the pipe c
8. After the main unit has been turned off for a long period check the date and time for correctness after power on If they differ from the current ones provide resetting by referencing Section 3 6 Setup of Date and Time For the reference purpose only about one hour charging can retain the data for about one to two weeks Other data will not be erased The backup battery is not fully charged before the shipment Fuji Tecom recommends you to turn on the main unit to charge this backup battery after the equipment is delivered to you 3 3 Checking and or Replacing the Batteries Pre amplifier 3 3 Checking and or Replacing the Batteries Pre amplifier 1 Checking the battery power LEAK NOISE CORRELATOR PLEASE REPLACE THE BATTERIES Speaker There are blue and red pre amplifiers Check both units respectively Before using the pre amplifiers be sure to check the batteries have enough capacity To this end press the Power switch on each pre amplifier Each unit is equipped with the self check function that always monitors the battery voltage After the pre amplifier is turned on it checks the battery voltage first of all and if the voltage is below the specified level the message Change batteries appears on the LCD When this is your case replace the batteries with new ones If the LCD is turned off during the self check
9. and Stereo The current output mode is displayed on the screen Battery voltage When the battery voltage gets below the specified level the warning symbol flashes at an interval of 1 s Wired operation mode is detected Radio operation mode is detected The unique symbol is displayed on the screen 65 7 4 Specifications of Pre amplifier PC data transfer function Transferable data Low battery shutdown function Voltage External interface Correlated data waveform monitor data and recorded noise data 3 9 V RS 232C 7 4 Specifications of Pre amplifier Applicable standard Service temperature range External dimensions Weight e Battery Consumption ampere Continuous operating time Minimum operating voltage e Display Operating key Terminals Function Correlation mode Amplifier gain setup mode e Filter setup mode Monitor function Power save function Key operation confirmation function Backlight function IP52 20 to 50 150mm W X 110mm D X 240mm H Antenna and Grip are not included in these figures Approx 2 85 kg including batteries LR20 X 6 9 VDC Under 550mA at 9 V Backlight is turned on 8 h min at 20 Backlight is turned off and the signals are being received 6 0 V Character LCD Membrane switch Power Enter Select Adjust Light Speaker Some pictorial symbols a
10. and confirm it When 2 All DELETE is selected a confirmation message pops up When you really want to delete all the data acknowledge the deletion The deleted data cannot be recovered When 7 NOISE RECORDING is selected from the main menu the screen shown left appears You can record replay delete or all delete the leak noise data collected with the pick ups When 0 RECORDING is selected the main unit prompts the file number to which the recorded noise data will be saved After you select the file number the main unit furthermore prompts you to determine whether the recorded noise data is saved or not If the current file number is OK press the Enter key If the data has already been saved to the selected file number pressing the Enter key will erase the existing data 38 4 7 Menu on Main Unit B B 03 04 08 10 06 28 7 NOISE RECORDING No OHz Blue 100 0Hz 42 14 B000Hz GHz Red 1 135 0Hz 15 2TdB B000Hz 0 RUN P suM 7989 YZ 0 During the recording the same screen as the waveform monitor is displayed as shown left While the leak noise is being recorded the following menus are active 0 RUN 1 PAUSE also used for reexecution After the leak noise is recorded for sixteen seconds the screen stops movement When 0 RUN is selected during the recording or standstill mode or after the elapse of sixteen second recording time record
11. the target pipe This completes the setting necessary to detect the leak position 5 Select 2 Correlation The measurement is executed and the result appears on the screen To ensure the correctness of the result manually set the Td range and filters re execute the measurement and check the change from the previous data e Smaller Td range increases the resolution of data collection Fuji Tecom recommends you to use small Td range as far as possible when the distance between pick ups is short 44 4 9 Menus on Pre amplifier 4 9 Menus on Pre amplifier This section describes the screen configuration on each pre amplifier
12. this additional time is called time difference Since the time difference is determined by calculating the correlation coefficient N is a product of time difference and sound velocity When N is known the distance from the leak position to the red pick up is calculated from D N 2 since D is given as one of preconditions The equation is expressed as follows _ DN D VxT 2 2 Where Td Delay time time difference 63 7 3 Specifications of Main Unit 7 3 Specifications of Main Unit Applicable standard Storage temperature range e Storage humidity range Service temperature range Service humidity range External dimensions Weight e Battery Consumption ampere Continuous operating time Minimum operating voltage e Impact resistance applicable standard e Vibration resistance applicable standard Display Operating key e Interface and terminal Input e Function Correlation operation Operation Delay time range Time resolution High pass filter Low pass filter Notch filter Auto filter Correlative operation data memory IP52 20 to 60 10 to 90 RH No condensation permitted 20 to 50 30 to 90 RH No condensation permitted 197mm W X 100mm D X 250mm Projections are not included in these figures Approx 3 1 kg including batteries LR20 X 4 6V DC Ni Cad pack size D batt
13. 030 314 150 6inch 899 274 50 2inch 4400 1341 20 3 4inch 4070 1241 20 3 4inch 4530 1381 40 1 1 2inch 1030 314 40 1 1 2inch 1030 314 200 8inch 899 274 100 4inch 4290 1308 25 tinch 3900 1189 25 inch 4490 1369 50 2inch 1030 314 50 2inch 1030 314 150 Ginch 4120 1256 30 1 1 4inch 3970 1210 30 1 1 4inch 4460 1359 200 Binch 3960 1207 40 1 1 2inch 3940 1201 40 1 1 2inch 4430 1350 300 12inch 3700 1128 50 2inch 3840 1170 50 2inch 4400 1341 450 18inch 3390 1033 65 2 1 2inch 4360 1329 600 24inch 3110 948 75 3inch 4300 1311 900 36inch 3010 917 100 4inch 4230 1289 1200 48inch 3110 948 125 5inch 4130 1259 1500 60inch 2920 890 150 6inch 4100 1250 1800 72inch 3010 917 200 8inch 4040 1231 2100 84inch 3080 939 250 10inch 4000 1219 2400 96inch 2960 902 300 12inch 3900 1189 76 INSPECTION CERTIFICATE MODEL LC 2500 DATE SERIAL No We hereby certify that the undersigner checked the above instrument with careful attention under the Fuji interoffice inspection standard consisting of four main items as follows 1 EXTERNAL APPEARANCE Knob lever amp key Connector Joint 3 ELECTRIC FUNCTION Indicator amp Display Output Sensitivity Frequency Input Power 4 OPERATION ON TEST SITE cees Distance Location Level Depth x Flow Direction xPressure Inspected by Ins
14. 04 18 11 50 46 3 WHITE NOISE LENGTH 100 00m 1 YELOCITY 1346m s 2 lt 4 FFT ANALYSIS gt When the pipe data is incomplete you can measure the pick up to pick up distance and the sound velocity of the leak noise through this menu to complement the data This menu will be discussed in Chapter 5 Practice in detail When 4 FFT ANALYSIS is selected from the main menu the screen shown below appears The upper waveform shows the result of the frequency analysis for the data collected with the blue pick up while the lower waveform shows the result of the frequency analysis for the data collected with the red pick up The vertical and horizontal axes show signal level and frequency respectively The frequency horizontal axis can be changed with the menu 2 FREQUENCY RANGE 02704718 11 32 33 ANALYSIS GHz Blue 100 0Hz 1777148 5000Hz 0Hz Red 200 0Hz RUN 23 EE BOOOHz 1 Frequency range Frequency and maximum signal level sUM OT2 Y2 2 Magnification factor of vertical axis Smaller value shows larger leak noise Number of averaging cycles Menu It has the following contents 0 RUN Starts the calculation 1 PAUSE Suspends the calculation To resume the calculation reselect this menu 2 FREQUENCY RANGE Changes the display range of the horizontal axis 1 2 5 and 5 kHz ranges are available
15. 100 standard pick up VP pick up and Hydrophone sensor Piezoelectric pick up 2 5 V g peak IP68 The pick up must meet the standard after it is submerged in the water at the depth of 2 m for 5 days 1 m asphalt 30 mm x130 mm H 0 42 kg 5V 3 wire 100 Q max 67 8 Troubleshooting The procedures described herein should be used when your leak detection system is faulty If the appropriate troubleshooting does not restore the equipment or the troubles are not defined in this chapter please contact Fuji distributor or Fuji Tecom 1 The main unit and or pre Check whether batteries are mounted amplifier are not turned on Take out the battery box and replace the batteries with new ones Check whether the polarity of the batteries is correct Check whether the fuse is blown out If it is broken replace it with new one Fuse 2A slow blow type 2 Keys on the mainunit and or Press each key certainly The key when pressed generates a confirma pre amplifier are not ope tionsound rable 3 The main unit does not receive Check whether the pre amplifiers are turned on the radio signals or the receiv Check whether a receive antenna is certainly connected to the main unit ing performance is poor Check whether buildings exist between main unit and pre amplifiers If these structures exist the radio waves might not reach the main unit Hold the pre amplifiers and t
16. 2A M3x6 Screw Battery terminal spacer LC250A27A M3x10 Screw Battery box TYPE C103 Right cover assembly LC250A36A M3x8 Screw Battery cover LC250A33A Latch 70 amp 6 9 Serial number seal for main unit 4 MP142035 Receiver antenna G 02 004 Belt assembly LC250A32A BNC connector BNC356 BJ M3x8 Screw Top cover LC250A19A Side cover left LC250A18A Headphone jack 01J0154 M3x8 Screw LCD LCD fixing plate LC250A21A Receiver unit G 02 007 M6 Spring washer M6 Flat washer M6 Hexagon nut Waterproof ventilation filter Bottom cover LC250A20A Company seal RS232C connector M2x8 Screw Frame assembly for main unit LC250A02A e Main unit 71 e Parts list of Pre amplifier 9698968669669 o600009oo9oo oepooopo Handgrip 3 MP142050 Antenna G 93 044 Blue Red colour plate 4 MP142039 40 M3x8 Screw Switch membrane 4 MP142003 Antenna isolation bushing 4 MP142022 Acrylic resion plate 4 MP142042 Isolation washer for antenna 4 MP142021 M6 lug terminal M6 Hexagon Nut Frame assembly for pre amplifier 1 MP142023 Cover for test only for demestic use Grip packing 4 MP142052 Round knob Rubber cover side 2 MP142000 Waterproof cap for headphones 4 MP942027 MA Flat metal washer Cable connector cap R04 CR6 P U connector cap R20 CR Headphone jack 01J0164 Cable connector R01 02R9 6F P U connector R20 R8M Fla
17. 3 SAVE Saves the measured waveform monitor data to the internal memory 37 4 7 Menu on Main Unit lt 5 CORRELATION FILE gt Er 08 04 08 08 22 55 5 CORRELATION FILE 0 RECALL 1 DELETE 2 ALL DELETE 3 SAVE No 0 N MAIN MENU 6 FFT FILE Er OG 08 04 08 08 24 11 B FFT FILE 0 RECALL 1 DELETE 2 ALL DELETE 3 SAVE No 0 N MAIN MENU 7 NOISE RECORDING gt 02 04 18 11 84 35 NOUISE RECORDING RECORDING PLAY 2 DELETE SIALL DELETE When 5 CORRELATION FILE is selected from the main menu the screen shown left appears You can display delete or all delete the leak position data saved Selecting the desired item displays the list that contains data file numbers as well as corresponding measurement dates and times Select the file number to be displayed or deleted with the numeric key and confirm it When 2 All DELETE is selected a confir mation message pops up When you really want to delete all the data acknowledge the deletion The deleted data cannot be recovered When 6 FFT FILE is selected from the main menu the screen shown left appears You can display delete or all delete the waveform monitor data saved Selecting the desired item displays the list that contains data file numbers as well as corresponding measurement dates and times Select the file number to be displayed or deleted with the numeric key
18. 5 Save to WHITEI The data will be saved to 1 0 0 12 1 0 0 13 or 1 0 0 14 WHITEI 2 or 3 for pipe material 53 5 3 White Noise Method Case 2 B 02 04 18 11 57 08 3 WHITE NOISE 0 PIPE LENGTH 1 VELOCITY 2 RUN 5 MATERIAL En 08704708 10 81 14 3 2 RUN i m n s LPF 26500Hz 0 00m Om s HPF 380Hz Td z 25 52ms N F 50Hz rat S Naan 60 0ms 0 0ms 50 0ms RUN D SUM 008 Y2 0 0 Select 3 WHITE NOISE from the main menu The screen shown left appears Since the material and bore are known but the length is unknown in this case select 1 VELOCITY The screen shown left appears Enter the sound velocity The calculated length is displayed in the field of L Access the pipe data input screen and enter the value as pipe length 54 5 3 White Noise Method Case 3 In this case both the bore sound velocity and length of the pipe are unknown and therefore the sound velocity data obtained from the pipe material type is input as an estimated value to temporarily detect the leak position For the sound velocities see the table below The speed of the leak noise propagating inside the pipe generally depends on the material and bore Metal pipes provide higher sound velocity than resin pipes while larger bore decreases the velocity for the same pipe ma
19. CORRELATION Rub the pick up magnets bottom surfaces each other Check the following operation result and correlation waveform appears on the correlation screen The delay time is Td 0 0 ms The peak correlation waveform is displayed at the position where this delay time is 0 0 ms En 02 04 18 11 08 08 2 CORARELATION LPF 2500Hz Blue 0 00m HFF 380Hz ed MF 50Hz Td 0 0 ms 60 Oms 0 0ms 50 0ms 4 Pe 50 040 Y2 1 Note 1 Do not rub the pick ups strongly Otherwise Td might not be 0 0 ms Note 2 When contaminants such as mud are adhered to the magnet Td might not be 0 0 ms Before checking remove these contaminants 3 6 Setup of Date and Time 3 6 Setup of Date and Time The current time last two digits of Christian Era month day hour minute and second is displayed on the upper right corner of the LCD Check the date and time If they differ from the current ones conduct resetting according to the following procedure The date and time determined will be saved together with the measured data and therefore you should provide correct setting 02 04 18 11 08 46 Select 0 STATUS SETUP from the main menu PHPHCO MnCo mrEmO c Eh qe oe Won D som N 25 P sb W F EE oF N M H Select 3 DATE TIME ADJUSTMENT from the main menu p ms 25001 F UP USTMENT BH amp 220418 11 10 20
20. D Pick up sensor Detects the leak noise at the measurement point Magnet Allows the pick up to attract a pipe or other target 3 Pick up cord Sends the signals acquired with the pick up to the pre amplifier Pick up connector Connects the pick up and pre amplifier 12 3 Pre operation Check 3 1 Checking and or Replacing the Batteries Main Unit 3 1 Checking and or Replacing the Batteries Main Unit 1 Checking the battery power Battery power indicator CLight Monitor Delete Escape 10 0 Before using the correlator be sure to check the batteries have enough capacity To this end turn on the main unit When it is not fully charged the open space is observed in the battery power indicator as shown in the figure above This open space is enlarged as the main unit consumes the battery power If the battery power indicator is flashing replace the batteries immediately Before the replacement be sure to turn off the main unit Fuji Tecom recommends that you should prepare spare batteries to cope with the runout of battery power during the operation 3 1 Checking and or Replacing the Batteries Main Unit 2 Removing and attaching the battery cover and replacing the batteries The main unit needs four 4 commercially available size D alkali dry batteries LR20 When other batteries are used the continuous operating time of the
21. E 4 ZOOM OUT 8 GRADING 5 SAVE TO WHITE1 6 SAVE TO WHITE2 7 SAVE TO WHITES 4 FFT ANALYSIS 0 RUN I 1 PAUSE 5 CORRELATION FILE 5 0 RECALL 2 FRO RANGE 0 1kHz r 1 DELETE 3 SEVE B 2 5kHz 2 ALL DELETE 2 5kHz L 3 SAVE No 0 6 FFTFILE 0 RECALL 1 DELETE 7 NCISE RECORDING 0 RECORDING 2 ALL DELETE 1 RECALL 3 SAVE No 0 8 MEMO 2 DELETE 3 ALL DELETE 9 HELP 28 4 7 Menu on Main Unit 4 7 Menu on Main Unit MAIN MENU 02 04 18 11 08 46 After the main unit is turned on FUJI TECOM appears in the center of the screen and changes to the main menu shown left several seconds later This section describes this main menu The current date and time appear on the upper right corner of the screen When the date and time are not correct provide resetting by referencing Section 3 6 Setup of Date and Time U TAT IPE HIT FT ORR FT 015 EMO ELF N 75 AG 2 sp E si N M 0 STATUS SETUP You can specify the Td range filters and date and time In addition you can access 1 Set Pipe Conditions from this menu 1 PIPE CONDITION SETUP You can enter or change the pipe data material bore and length After the data input you can directly access 2 Leak Position Detect from this menu 2 CORRELATION You can start the detection after the necessary conditions are defined The leak position and correlation waveform which were processed base
22. FUJ LEAK NOISE CORRELATOR LC 2500 INSTRUCTION MANUAL Instruments for the location of underground utilities and water leaks FUJI TECUM inc Preface This manual describes the Fuji leak noise correlator Model LC 2500 Before using your equipment be sure to read this manual to comprehend proper operating and handling procedures Applicability Pick ups are mounted to the fittings such as fire hydrant valve or meter on the underground piping to capture the leak noise and identify the leak position Precautions Before using this correlator completely read and comprehend the safety notes listed below Follow the instructions and procedures described in this manual to operate this instrument Always observe the precautions indicated on this instrument and manual Symbols The following symbols are used in this manual for the purpose of warning so that you can avoid property and personal damages N WARNING This symbol indicates the existence of a potential danger that may cause death or serious injury N CAUTION This symbol indicates the existence of a potential danger that may cause slight or moderate injury CAUTION This symbol indicates the existence of a potential danger that may cause serious damage of LC 2500 or surrounding properties N WARNING While listening the leak noise with a headphone set during the operation of this unit be completely carefu
23. T When PIPE DATA INPUT is selected new data input mode becomes active and resultantly the data already input is deleted As shown left move the cursor to the item you want to change and change the data with numeric keys To delete the pipe data be sure to select PIPE DATA EDIT When PIPE DATA INPUT is selected new data input mode becomes active and resultantly the data already input is deleted As shown left move the cursor to the Material filed of the item you want to delete and delete the data with the Delete key This function deletes the data in the Material Bore and Length fields of the target item 50 Waveform Monitor Function 5 2 5 3 White Noise Method 5 2 Waveform Monitor Function This function uses DSP Digital Signal Processor built in the main unit and executes the FFT Fast Fourier Transform operation for the leak noise data collected with pick ups to analyze the leak noise frequencies The waveform monitor function can analyze the frequency components of the leak noise collected with pick ups and help the filter setup manual setup 5 3 White Noise Method To detect the leak position with this correlator it is necessary that the material and bore sound velocity of the pipe and the distance between pick ups have been identified If any of these parameters is unknown the leak position cannot be measured However a part of the pipe data may be unknown depending on the site conditio
24. TION 02 04 18 15 55 33 After the parameter setup is complete in 0 STATUS SETUP and 1 PIPE DATA SETUP selecting 2 CORRELATION from the main menu displays the screen shown left The leak position is calculated based on the set parameters After the calculation is completed the distances to the leak position from blue and red pre amplifiers are displayed This screen shows the distances from blue and red pick ups are both 0 m The symbol shows pb that the leak position is under calculation During the calculation the value in SUM at the bottom is increased one after another This value shows how many times the calculation is iterated the maximum is 999 Larger SUM value provides higher reliability of the calculation result Filter settings Leak position Maximum position on the correlation waveform Td range Vertical axis showing degree of correlation Smaller value results in better correlation Number of averaging summation The menu will be discussed in the next paragraph 35 4 7 Menu on Main Unit About menu 0 RUN You should select this menu to start the calculation To recollect the data select 1 PAUSE once and start the calculation 1 PAUSE This menu suspends the calculation To resume the calculation select this 1 PAUSE again When you press 0 START mistakenly the current calculation resul
25. The cursor appears Move the cursor to the parameter you 3 DATE TIME ADJUSTMENT want to change and enter the value Then press the Escape N2 04 18 11 11 key The previous screen reappears This sets the new date and time l STAT ETUF 20 4 Operating Procedure 4 1 Radio and Cable Modes 4 1 Radio and Cable Modes 1 Radio mode Leak position 2 Cable mode This mode is used when the radio communications cannot be established between leak detector and pre amplifiers due to interference with buildings and the like or the radio waves interfere with those emitted from any radio stations Usually the leak detection is implemented under the radio mode shown in 1 above Cable draum option E Connecting cable option rai qu Leak position 21 4 2 Example of Operation 4 3 False Leak Noise 4 2 Example of Operation This section describes how to operate the leak detection for the pipe shown below In this example it is assumed that the water leaks from a certain position of the pipe The pre amplifiers detect the leak noise and send the signals to the main unit
26. al e Correlator This equipment calculates the correlation coefficient of the signals acquired with pick ups The pre amplifiers send the signals which have been acquired with the pick ups mounted in two places to the leak detector and the leak detector calculates the correlation coefficient of these signals calculates the time difference between the two signal inputs and obtains the leak position e Sound velocity The leak detector displays the velocity of the sound propagating in the water filled in the pipe Metal pipes provide higher sound velocity than resin pipes while larger bore decreases the velocity for the same pipe material e Filter As already explained in Section 5 7 Notch Filter using filters can extract only the frequency components necessary for the measurement e Td range Td range means a delay time The delay time refers to the time difference between the time when one pick up acquires a signal and the time when another pick up acquires a signal When a signal source exists in the center of the span between pick ups the signal propagation times are identical and the time difference Td equals to 0 When the signal source is close to the reference pick up Td will be positive value When the signal source is far from the reference pick up Td will be negative value e DSP Digital Signal Processor This microprocessor can process the digital signals such as audio image and animation signals in real time at high spe
27. ase Cover Metal Cable Clump Lifting Lug M2x5 Screw Upper Rubber Cover Steinless Steel Wire Wire Connection Lug Thermal Shrinkage Tube _5 Waterproof Connector Rubber Bushing Tying band CV 70 9 4 Bead Noiseless Cable 3m 74 e Pick up sensor 75 List for Velocity of Each Pipe Diameter used by LC 2500 Kind of Pipe Ductile Cast lron Pipe Cast Iron Pipe Asbestos Cement Pipe Polyvinyl Chloride Pipe Lead Pipe Mark DIP CIP ACP PVC LEAD Diameter Velocity ft s Velocity m s Diameter Velocity f s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s 75 3inch 4400 1341 75 3inch 4300 1311 75 3inch 3640 1109 13 1 2inch 2040 622 10 3 8inch 3710 1131 100 4inch 4300 1311 100 4inch 4200 1280 100 4inch 3540 1079 20 3 4inch 1870 570 13 1 2inch 3610 1100 150 Ginch 4170 1271 150 6inch 4070 1241 150 6inch 3480 1061 25 1inch 1810 552 20 3 4inch 3480 1061 200 8inch 4070 1241 200 8inch 3940 1201 200 Binch 3440 1049 40 1 1 2inch 1590 485 25 inch 3410 1039 250 10inch 3900 1189 250 10inch 3870 1180 250 10inch 3440 1049 50 2inch 1470 448 30 1 1 4inch 3380 1030 300 12inch 3770 1149 300 12inch 3770 1149 300 12inch 3410 1039 75 3inch 1440 439 40 1 1 2in
28. ch 3310 1009 350 14inch 3710 1131 350 14inch 3740 1140 350 14inch 3410 1039 100 4inch 1370 418 50 2inch 3280 1000 400 16inch 3710 1131 400 16inch 3670 1119 400 16inch 3410 1039 150 6inch 1370 418 450 18inch 3670 1119 450 18inch 3640 1109 450 18inch 3410 1039 200 8inch 1370 418 500 20inch 3640 1109 500 20inch 3610 1100 500 20inch 3380 1030 250 10inch 1370 418 600 24inch 3580 1091 600 24inch 3540 1079 800 32inch 3150 960 300 12inch 1370 418 900 36inch 3510 1070 750 30inch 3510 1070 1100 44inch 3230 985 400 16inch 1130 344 1200 48inch 3480 1061 900 36inch 3480 1061 450 18inch 1130 344 1500 60inch 3440 1049 1200 48inch 3440 1049 500 20inch 1130 344 1500 60inch 3410 1039 600 24inch 1130 344 Kind of Pipe Low Density Polyethylene Pipe High Density Polyethylene Pipe Polyethylene Main Pipe Steel Pipe Copper Pipe Galvanized Steel Pipe Mark LDPE HDPE PEMAINS SP COP GALV GP Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s Diameter Velocity ft s Velocity m s 20 3 4inch 1030 314 20 3 4inch 1020 311 75 inch 899 274 13 1 2inch 4550 1387 10 3 8inch 4300 1311 10 3 8inch 4560 1390 25 tinch 1030 314 25 1inch 1030 314 100 4inch 899 274 25 1inch 4510 1375 13 1 2inch 4200 1280 13 1 2inch 4560 1390 30 1 1 4inch 1030 314 30 1 1 4inch 1
29. d on the data obtained from the measurement are displayed The result of operation can be saved to the internal memory The result is saved to the internal memory by selecting 2 Correlation 7 Save The number of data savings is 100 3 WHITE NOISE Pipe Length Sound Velocity Measurement When the pipe data is incomplete you can measure the pick up to pick up distance and the sound velocity of the leak noise through this menu to complement the data The calculated sound velocity can be saved to the internal memory The calculated sound velocity is saved to the internal memory by selecting 3 White Noise 2 Measurement 5 WHITEI 6 WHITE2 7 WHITE3 4 FFT ANALYSIS The leak noise data collected with the pick ups is subject to frequency analysis and the result is plotted as a graph The result can be saved to the internal memory The result is saved to the internal memory by selecting 4 Waveform Monitor 3 Save The number of data savings is 50 for blue and red pick ups respectively i e 100 in total 29 4 7 Menu on Main Unit 5 CORRELATION FILE The data processed with the menu 2 CORRELATION can be saved to the internal memory This data processing menu displays deletes or all deletes the data saved 6 FFT FILE The data processed with the menu 4 FFT ANALYSIS can be saved to the internal memory This data processing menu displays deletes
30. de the cable drum and connecting cable are optional CA A rod Leak position Insert battery boxes into the main unit and pre amplifiers Arrange cables from cable drums to pre amplifiers Plug the cable in each pre amplifier Plug in the main unit by use of the connecting cable from each cable drum dentify the blue and red pre amplifiers to avoid illegal cable connection Plug pick ups in the appropriate pre amplifiers f you fail to connect the pick up an error message No sensor connection appears when the pre amplifier is turned on Turn on the main unit and pre amplifiers Note After turning on main unit check the following symbol appears on the LCD SIs Cable mode indication symbol After pulling out the cable from the cable drum plug it in the main unit If the connecting cable has been connected to the main unit in advance the cable will be twisted and damaged by means of rotating cable drum 24 4 5 Preparation at Site 4 5 Preparation at Site 1 Preparation of necessary conditions and data To find the leak position with the correlator as shown below the following four conditions as well as data must be needed
31. detector will differ from the specification described herein due to difference in battery capacity Remove the battery cover take out the battery box and replace the old batteries with new ones After reinsertion of battery box be sure to remount the battery cover Spin a latch 90 degrees 2e Terminal post If those batteries that are not specified by FUJI TECOM are used and resultantly the detector fails the warranty statement will be invalid When replacing batteries be careful of their orientations Incorrect orientation will cause bursting fire and or injury Do not mount different types of batteries mixing in the battery box Otherwise bursting or leakage will occur Dispose of the replaced batteries according to your local rules and regulations Pay attention not to dispose of the battery box together with the batteries 14 3 2 Backup Battery 3 2 Backup Battery A data backup battery is built in the main unit This battery is used to count dates and times and store the recorded leak noise data This secondary vanadium coin battery is rechargeable After the main unit is turned on the secondary battery is automatically charged with the main batteries Therefore when the main unit stands for longer period the secondary battery is self discharged to decrease the power level If the backup battery is completely discharged the date time and recorded leak noise data are lost
32. eds e FFT Fast Fourier Transform Concretely speaking the FFT operation calculates the Fourier coefficients of the Fourier series This leak detector digitally samples the input signal waveforms stores the sampled waveforms executes the FFT operation for them and displays the result Pick ups acquire the time dependent data and it is difficult to execute the frequency analysis for the raw data After the data is processed by the FFT operation the frequency analysis can be executed for those signals that alter as the time changes Even when the noise acquired with the pick ups are listened you cannot identify the major frequency components You can identify the time dependent signal change After the FFT operation the frequency analysis can be used and therefore you can identify the major frequency components of the signal e White noise This noise uniformly contains all the frequency components that exist in a certain frequency band Young s modulus modulus of longitudinal elasticity When a load is applied to an object within a certain range and removed the object completely recovers to the original state This property is called elasticity The displacement is proportional to the load within the elastic region The relationship is expressed as follows o E e Where Stress E Young s modulus Strain The proportional constant is called Young s modulus 62 7 2 Principle of Leak Noise Cor
33. ery X 4 4 8 VDC Under 550mA at 6V Backlight is turned on 8 h min at 20 Backlight is turned on and the signals are being received 4 2 V JIS C0041 1999 JIS C0040 1999 Dot matrix LCD Membrane switch 0 1 2 3 4 5 6 7 8 9 1 1 25 lt Enter Escape Delete Light Monitor Some pictorial symbols are used Receiving antenna waterproof Wired control input with waterproof cap Headphone output with drip proof cap RS 232C Fuse holder Power switch with drip proof cap LCD contrast Radio or Cable Polarity correlation 50 ms 100 ms 200 ms 400 ms 800 ms 1600 ms 25 us in 50 ms range 50 us in 100 ms range 100 us in 200 ms range 200 us in 400 ms range 400 us in 800 ms range 800 us in 1600 ms range 80 Hz 180 Hz 380 Hz 800 Hz THRU 630 Hz 1250 Hz 2500 Hz 5000 Hz OFF 50 Hz 60 Hz Filters are automatically selected according to the result of FFT operation Measurement conditions calendar and time and operation result can be saved by 100 data sets 64 7 3 Specifications of Main Unit Pipe conditions Pipe material 11 types bore XXXX mm sound velocity XXXX m s pipe length XXXX XX m Manual sound velocity calculation function Input Outside diameter XXXX X mm wall thickness XX X mm Young s modulus XXXXXX MPa Automatic delay time range setup function Conditions Correlation e
34. hrough 8 Evaluation so that you can select the desired menu item lt O START P gt 27 4 6 Menus on Main Unit _ 0 50ms I 1 100 MEIN MENU 2 200ms 3 400ms 0 AUTO L 4 800ms 0 STATUS SETUP 0 Td RANGE 1 MANUAL 5 1600ms 1 FILTER SETUP 0 AUTO 1 MANUAL 0 LOW PASS FILTER 0 630Hz 2 PIPE DATA SETUP _ 1 1250Hz 3 TIME ADJUSTMENT r 2 2500Hz 3 5000Hz 1 PIPE DATA SETUP 0 PIPE DATA INPUT 0 PIPE MATERIAL 0 DIP t 1 HIGH PASS FILTER 0 THRU 1 1 80Hz 2 ACP r 2 180Hz 3 VP r 3 380Hz I 4 LP 4 800Hz r 5 PE1 2 NOTCHFILTER 4 0 OFF 6 PE2 t 1 50Hz L 7 PE3 2 60Hz 8 GP I 9 SSP I 10 CUP 11 etc 0 INPUT VELOCITY 12 WHITE1 t 1 METAL PIPE 0 OD 13 WHITE2 L 2 NON METAL PIPE 1 THICK L 14 WHITE3 I 3 SAVE TO ETC1 2 YOUNG S 15 etc I 4 SAVE TO ETC2 16 etc2 5 SAVE TO ETC3 17 etc3 18 DIRECT 1 PIPE SIZE 1 14 PIPE SIZE 2 PIPE LENGTH I 1 PIPE DATA EDIT 2 CORRELATION 2 CORRELATION 0 RUN I 1 PAUSE 3 WHITE NOISE 0 PIPE LENGTH t 2 SEARCH 1 VELOCITY 0 PIPE MATERIAL t 3 ZOOM IN 2 RUN 0 RUN 4 ZOOM OUT 1 PAUSE 5 STATUS SETUP 2 SEARTH 6 PIPE SETUP 3 ZOOMIN t 7 SAV
35. ied leak position data 42 4 7 Menu on Main Unit 5 1 Delete Deletes the specified leak position data 5 2 All Delete Deletes all the leak position data saved 6 FFT FILE You can display delete or all delete the waveform monitor data saved 6 0 Display Displays the specified waveform monitor data 6 1 Delete Deletes the specified waveform monitor data 6 2 AII Delete Deletes all the waveform monitor data saved 7 NOISE RECORDING You can record replay delete or all delete the leak noise 7 0 Record Records the leak noise 7 1 Replay Replays the specified leak noise data 7 2 Delete Deletes the specified leak noise data 7 3 Delete Deletes all the leak noise data saved 8 MEMO You can record the necessary information for example site situation 43 4 8 Basic Data Input Operation on Main Unit 4 8 Basic Data Input Operation on Main Unit This section describes the basic flow for the detection of leak position The following flow shows the operation in wireless communication mode 1 Turn on the main unit and check the battery power is enough and the equipment receives signals from each pre amplifier 2 Select 0 Status Setup 0 Td Range Setup 0 Automatic Setup 3 Select 0 Status Setup 0 Filter Setup 0 Automatic Setup to set the filters 4 Access 1 Pipe Data Setup and enter the material bore and length of
36. ing is restarted and the existing data is lost To save the data press the Escape key to return to the previous screen Even if the recording time is less than 16 seconds the data already recorded will be saved bb During the replay the symbol shown left is observed the center of the screen pr During the recording the symbol shown left is observed in the center of the screen Selecting any of menus 1 through 3 displays the list that contains data file numbers as well as corresponding measurement dates and times Select the file number to be displayed or deleted with the numeric key and confirm it When 2 ALL DELETE is selected a confirmation message pops up When you really want to delete all the data acknowledge the deletion The deleted data cannot be recovered 39 4 7 Menu on Main Unit 8 MEMORANDUM gt 02 04 18 11 44 50 When 8 MEMO is selected from the main menu the screen shown left appears You can enter up to 227 characters showing necessary information for example site situation First the abcdefg hid cursor appears on the alphanumeric table at the bottom Enter the note in alphanumerics and press the Enter key to confirm it Now the note appears from the upper left corner in the frame To edit the note move the cursor to EDIT on the bottom corner and select it The cursor appears in the frame Move the cursor to the desired position and press the Enter
37. is invalid The white noise oscillator system is optional unit Please contact Fuji Tecom Inc about its details The following paragraphs describe concrete operating procedures 52 5 3 White Noise Method Case 1 Er 02 04 18 11 57 08 3 WHITE NOISE O PIPE LENGTH 0 00m 1 VELOCITY 5 2 RUN E H 08 04 08 10 24 20 EES 3 0 PIPE LENGTH LENGTH Al CANCEL ENT 4 DEL B nuo Zn 03 04 08 10 81 14 3 2 RUN MEUSE m Yi m s LPF 2500Hz 0 00n Om s HPF 380Hz X 25 52ms N F 5Hz fin 0 RUN p suM oo8 YZ 0 Saving the data Select 3 WHITE NOISE from the main menu The screen shown left appears Since the pipe length is known but the sound velocity is unknown in this case select 0 PIPE LENGTH The screen shown left appears Enter the pipe length Return to the white noise screen with the Escape key and select 2 RUN Although the values and calculation result are not shown in this screen the calculated sound velocity is actually displayed in the field of V Also the input values are displayed in the parentheses You can save the calculated value to the internal memory To this end use the menu 3 2 RUN 5 WHITE 6 WHITE2 7 WHITE3 Basically use the same operation as the leak position data Select 3 2 RUN 1 PAUSE during the measurement Change the menu and select 3 2
38. l since it will be difficult to hear the background sounds Do not replace the batteries and or operate this unit with wet hands When the batteries have been mounted to the battery box handle this unit with great care If the terminals are short circuited heat generation bursting fire and or injury will occur When inserting the batteries into the battery case pay attention to the polarity Incorrect polarity will result in leakage heat generation damage and other troubles Do not put the batteries into the fire Otherwise you will suffer from bursting fire and or injury Do not disassemble the batteries Otherwise you will suffer from bursting fire and or injury N CAUTION Do not hold the handle to swing the detector Mount the battery cover certainly Otherwise the battery box may come off Do not swing the pick up CAUTION Do not leave or install this unit in a hot place Otherwise the detector may fail Use this unit only for the leak noise detection This detector is not a complete waterproof model Avoid immersion into water or operation in the rain Do not drop the detector nor apply strong impact to it Do not disassemble the detector Do not touch the panel display strongly Otherwise the detector may fail When the detector will not be used for a long period remove the batteries Do not bend the antenna by a
39. lacing the Batteries Main Unit 322 Backup Battery ose inerte tie 3 3 Checking and or Replacing the Batteries Pre amplifier 3 4 Inspection of Pre amplifiers eee 3 5 Comprehensive Inspection sse 3 6 Setup ot Date and aute Mec ee tee CRM 4 1 Radio and Cable Modes 4 2 Example of Operation 4 3 False Leak Noise 4 4 Preparations essem emm eme eminente 4 5 Preparation AU SIG o estes Oe Baha 4 6 Menus on Main Unit eee 4 7 Menu on Main Unit Main Menu emm 4 8 Basic Data Input Operation on Main Unit em 4 9 Menus on Pre amplifier 4 10 Pre amplifier Menu ceu oe ee ea eater abe etus 4 11 Self Check Function of Pre amplifier sss 4 12 Forced Turn off Function ees 4 13 Pick up sensor Mount Hooker 4 14 Listening with headphone sss 10 12 13 13 15 16 18 19 20 21 21 22 22 23 25 27 29 44 45 46 46 47 47 48 Main Unit gt 5 1 Pipe Data Handling 5 2 Waveform Monitor Function ees 5 3 White Noise Method een 5 4 Leak Noise Record Function 5 5 Evaluation of Detected Position eene 5 6 Auto Eilter onset tete e nn i e at 5 7 Notch Filter 5 8 Manual Calculation of Sound Velocity sss 59 LCD Contrast eec temet e eet e e S C a 5 10 Data Transfer to PC lt Pre amplifier gt 5 11 Automatic Sensitivity Adjustment m 6 PreservatiOn ceuntienncieht i Reb tide p iet UD io ER e LUN HUI 6 1 Storage Method 7 Technical Data Fal DefifiltiOn
40. listening the leak noise 5 5 Evaluation of Detected Position L coul 02 04 18 14 03 27 When 1 PAUSE 8 GRADE is selected on the CORRELATION Correla tion screen the screen shown left appears This 8 GRADING PP screen shows the degree of correlation evaluated based on GRADE the leak position measurement The evaluation is A HIGH CONFIDENCE FACTOR classified into three ranks B LOW CONFIDENCE FACTOR A B and C HIGH CONFIDENCE FACTOR C NO CONFIDENCE FACTOR B LOW CONFIDENCE FACTOR C NO CONFIDENCE FACTOR This evaluation is based on the correlation waveform and therefore you should use it as a guideline Even when the evaluation result A is reported there is necessarily no leakage 56 Auto Filter 5 6 5 7 Notch Filter 5 6 AutoFilter When you select 0 STATUS SETUP 1 FILTER SETUP 0 AUTOMATIC SETUP the leak detector automatically sets the filters This function executes the FFT operation for the leak noise signals sent from the blue and red amplifiers processes the frequency components under certain conditions and determines appropriate filter setting Basically the filter setting is determined so that the major frequency components of the leak noise data will be included Upon completion of FFT operation select 5 FILTER SETUP from the menu Now the filters are set and the condition setup screen reappears 5 7 Notch Filter After selecting 0
41. locity 41 4 7 Menu on Main Unit 1 0 2 Pipe Length You should enter the pipe length 1 1 Pipe Data Change You can change the pipe data input 2 CORRELATION You can detect the leak position 2 0 Run Starts the leak detection 2 Pause Suspends the leak detection 2 2 Search Turns on off the search function 2 3 Zoom up Magnifies the screen 2 4 Zoom down Reduces the screen 2 7 Save Saves the measurement result 2 8 Evaluation Evaluates the degree of abnormal noise detection based on the correlation waveform WHITE NOISE You can calculate the pick up to pick up distance or sound velocity 3 0 Pipe Length You should use this menu when the length is known but the material and bore sound velocity are unknown 3 1 Sound Velocity You should use this menu when only the material and or bore sound velocity is known but the length is unknown 3 2 Measurement You can measure the pipe length or sound velocity 3 2 5 Save to WHITE1 2 3 You can save the measurement result 4 FFT ANALYSIS You can execute the frequency analysis for the data collected with the pick ups 4 0 Start Starts the frequency analysis 4 Pause Suspends the frequency analysis 4 2 Frequency Range Sets the frequency range horizontal axis 4 3 Save Saves the result of frequency analysis 5 CORRELATION FILE You can display delete or all delete the leak position data saved 5 0 Display Displays the specif
42. m the pick up to a certain value The level indicator of the pre amplifier has ten adjustment steps and this function when works adjusts the sensitivity so that the indicator points level 5 or 6 However if the input signal level is extremely strong or weak the indicator might not point 5 or 6 due to internal processing 60 6 Preservation 6 1 Storage Method 6 1 Storage Method When this correlator will not be used for a long period store it according to the following procedures 1 Check any of the system components including instruction manual is not missing 2 Remove the batteries If the batteries are mounted in the unit for a long period leakage may occur to damage the equipment Before storing the batteries cover and insulate each of them with vinyl tapes to prevent short circuit 3 Do not store the batteries in a wet place After Operation When storing the detector after operation observe the following precautions 1 Clean each pick up to remove the mud and dirt completely and place it in the storage case The contaminated pick up may stain the main unit and pre amplifiers to cause malfunctions 2 If the detector is wet by rain wipe it to remove raindrops completely and place it in the storage case 3 Place only the detector in the storage case Otherwise it may be damaged or faulty 61 7 Technical Data 7 1 Definitions 7 1 Definitions This section describes the terms used in this manu
43. n The white noise method will be an effective solution The white noise method can handle the following three cases Items to be obtained Case Material Bore Sound velocity Distance 0 2 3 Estimated value Using the white noise method calculate the value identified with Upon completion of data calculation enter the pipe data 51 5 3 White Noise Method Principe of white noise method An white noise method is mounted to the same position as the blue pick up and the sound velocity and pick up to pick up distance are calculated from the time difference generated on the vibration sounds propagating to the red pick up from the blue pick up The following figure shows the system configuration for the white noise method The white noise oscillator system composed of oscillator and vibrator is mounted to the same position as the blue pick up 7 L4 M Pre amplifier blue Pre amplifier red White noise generator Battery 12 VDC EI a Oscillator Leak position Caution The white noise method can be used as long as the section between the pick ups consists of only one pipe When multiples pipes exist between the pick ups this method
44. n case of blowout replace it with new one 3 Waist strap hook You should hook both ends of the waist strap here Shoulder strap hook You should hook both ends of the shoulder strap here Headphone jack To listen the leak noise with a headphone set plug in it here Items 4 and are located on the left panel as well 2 2 Panel and Switches Pre amplifier 2 2 Panel and Switches Pre amplifier 1 Front panel Select Adjust D Antenna Transmits radio waves Q Hook Hooks the pick up sensor LCD You should control the pre amplifier through this screen Select Adjust key Selects the setting and adjusts the sensitivity Light key Turns on off the backlight for membrane switches and LCD While this Light key is active a light symbol is observed on the upper right corner of the LCD Speaker key Turns on off the speaker D Enter key Changes the menu and confirms the setting Power key Turns on off the pre amplifier 10 2 2 Panel and Switches Pre amplifier 2 Right panel 9 Headphone jack To listen the leak noise with a headphone set plug in it here Cable connector To use the pre amplifier in the cable mode plug in the cable here D Pick up input connector The pick up is connected here 2 3 Pick up Sensor 2 3 Pick up Sensor
45. ns so that the position that is generating the largest leak noise is located between these positions 3 Operation of pre amplifiers D Plug the pick up in each pre amplifier When the pre amplifier is turned on without connection of pick up an error message No sensor connection appears Tap lightly on each pick up magnet to check signals are certainly reaching the pre amplifier To set the sensitivity of the pre amplifier manually adjust it so that the normal signal level will be 5 or 6 26 4 6 Menus on Main Unit 4 6 Menus on Main Unit 1 Operation on main unit An interactive system is employed for operations on the main unit Operate the equipment by following the messages displayed on the screen Start the operation from the main menu Select the desired menu with the numeric key and confirm the selection with the Enter key This procedure may be omitted depending on the situation The following indication if observed at the bottom of the screen shows that pressing the Escape key returns you to the previous screen el MAIN MENU After the numerical parameters such as pipe length are input pressing the Enter key confirms those parameters The following indication if observed on any of screens including leak position detect screen selecting 0 starts detection of leakage Pressing up down right or left button of the CURSOR key changes the menu items among 1 Pause t
46. ondition setup menu and therefore you should specify Td so that it will not exceed the maximum value 1 FILTER SETUP annus 02 04 18 11 11 42 You can specify high pass low pass and notch filters 0 1 FI i TEI R SETUP Two modes automatic and manual are available and the 0 AUTO automatic mode has already been selected as shipping default Normally you should use the automatic mode 1 MANUAL 31 4 7 Menu on Main Unit 02704718 11 13 14 PASS FILTER 02 04 18 11 18 82 PASS gt 2 PIPE DATA SETUP This menu will be discussed in the next paragraph 3 CALENDAR AND TIME SETUP ER When the manual mode is selected generally set the filters by referencing the following examples High pass filter 380 Hz Low pass filter 2500 Hz For resin pipes the leak noise contains lots of low frequency components and therefore the following settings may improve the filter performance High pass filter 80 Hz Low pass filter 630 Hz The notch filter will be discussed in Chapter 5 Practice in detail Generally turn on this filter When the automatic mode has been selected the notch filter is turned off You should use this menu when it is necessary to set or change the date and time For the procedure see Section 3 6 Setup of Date and Time 32 4 7 Menu on Main Unit lt 1 PIPE DATA SETUP gt 0 PIPE DATA INPUT Red
47. onfirm the menu use the Enter key 45 4 10 Pre amplifier Menu 4 11 Self Check Function of Pre amplifier 4 10 Pre amplifier Menu Sensitivity Adjustment gt You can select automatic or manual adjustment Although the automatic adjustment will be discussed in Chapter 5 Practice in detail selecting this mode processes the signals input from the pick up and controls the pre amplifier to a certain sensitivity level In the manual adjustment you should control the sensitivity by yourself This time set the sensitivity being careful that the level indicator will not exceeds the specified range Fuji Tecom recommends that you should adjust the sensitivity while listening the noise from the speaker or headphone Listening the noise helps you judge whether the sensitivity adjustment is appropriate or not The screen where the signal level is displayed indicates the automatic or manual adjustment mode whichever effective After plugging in the headphone jack press the Speaker key N CAUTION When listening the noise with the headphone use complete care so that you will not hurt your ears lt Filter gt You can select the option whether the low band noise is filtered or not Usually select STD When the waveform monitored on the main unit contains many frequency components of less than 100 Hz attempt the THRU setting The correlation may be improved Generally external noises contain many f
48. ontrast 5 10 Data Transfer to PC The data saved in the internal memory detected leak position data waveform monitor data and leak noise data can be transferred to a personal computer The paragraph below describes the procedure Communication cable terminal 5 11 Automatic Sensitivity Adjustment Operating procedure gt 1 Remove the battery cover from the main unit Place this unit with the back facing upward Do not remove the battery box from the unit Turn on the main unit Note that the data cannot be transferred to the PC with the detector turned off 2 Prepare the communication cable specified by Fuji Tecom Plug the communication cable in the communication cable terminal on the leak detector and the COM port on the PC Proceed the operation according to LC 2500 for Windows User s Manual lt Pre amplifier gt 5 11 Automatic Sensitivity Adjustment Each preamplifier is capable of automatically adjusting the sensitivity of the signals input from the pick up When the input signals are weak the sensitivity can be increased to enhance the reliability If the sensitivity is excessively increased the input signals are distorted to fail accurate measurement Always check the sensitivity using the level indicator If the indicator exceeds the specified range the data acquisition may be illegal This automatic sensitivity adjustment automatically sets the signal level input fro
49. oung s modulus in calculation For outside diameter wall thickness and Young s modulus refer to the relevant standard The pipe manufacturers have the data Since diameters and wall thickness are stipulated in the JIS standard you should also refer to it List of Young s Modulus Material Young s modulus Mpa Material Young s modulus Mpa DIP 157000 HDPE 823 CIP 117500 PE MAINS 784 ACP 23500 SP 191000 PVC 3000 COP 124500 LEAD 15200 GALV GP 210000 LDPE 215 Above figures are our survey data and for reference purpose only After you select metal or resin pipe and enter the outside diameter wall thickness and Young s modulus the calculation is automatically executed Upon completion of calculation be sure to save the result to 1 etc2 or etc3 58 5 9 LCD Contrast 5 10 Data Transfer to PC Note that the result will not automatically be saved Operation flow Selection of 1 METAL PIPE selection of 0 OUTSIDE DIAMETER input of outside diameter selection of wall thickness input of wall thickness selection of Young s modulus calculation selec tion of 3 SAVE TO ETC 1 After the above sequence is completed the data will be saved to the internal memory of the leak detector The saved data can be called when you enter the pipe data 5 9 LCD Contrast The contrast of the LCD is adjusted in the factory before shipment Do not adjust the c
50. pplying unreasonable force Do not pull the pick up cable unreasonably Otherwise the cable may be broken to dysfunction the pick up Always be aware of the ambient conditions When disposing this detector follow your local rules and regulations Warranty Period FUJI TECOM warrants this correlator LC 2500 to be free from defects in material and or workmanship for one 1 year from the purchase The written warranty is an effective tool with which FUJI TECOM can provide utmost service operations to the customer If this correlator fails within the warranty period FUJI TECOM will repair it free of charge The repair within the warranty period needs showing the written warranty with the serial numbers of this instrument So the customer should keep it carefully If the customer does not or fails to notify its serial numbers FUJI TECOM will claim repair fees If this correlator fails after the expiration of the warranty period or the failure is attributable to customer s abuse misuse modification and any other unauthorized actions the repair will be non gratuitous Please consult FUJI TECOM for details Table of Contents Main unit pre amplifier and pick up sensor gt System Components 1 1 Component WAGE ST Te EE 2 Equipment Description 2 1 Panel and Switches Main Unit 2 2 Panel and Switches Pre amplifier 3 1 Checking and or Rep
51. ppropriate to essentially call comb filter the word notch filter is used for the sake of convenience Five notch filters are used to process the 50 Hz and 60 Hz frequency bands respectively For 50 Hz band mode the filters cut the harmonics in 50 100 150 200 and 250 Hz bands For 60 Hz band mode the filters cut the harmonics in 60 120 180 240 and 300 Hz bands When it is likely that pick ups acquire the harmonics in 50 and 60 Hz commercial bands Fuji Tecom recommends you to use the notch filters in the detection of leak position 5 8 Manual Calculation of Sound Velocity This main unit stores sound velocities of various pipes in its internal memory Basically available pipe materials and bores are stored to the memory but they might not cover all the applications encountered When parameters of the pipe material and bore are known but the data is not defined in the internal memory you can calculate the sound velocity of the pipe from the outside diameter wall thickness and Young s modulus modulus of longitudinal elasticity When selecting 1 PIPE DATA SETUP 0 PIPE DATA INPUT 0 PIPE MATERIAL 11 you can access the following options 0 SOUND VELOCITY INPUT 1 METAL PIPE 2 RESIN PIPE 3 4 5 SAVE TO ETC 1 2 3 The reason why metal and resin pipes are separately used is that the different equations are needed although they use the same data outside diameter wall thickness and Y
52. re amplifier 2 Press the Power switch 3 Press the Enter key and tap lightly on the pick up magnet This time check the level indicator oscillates If the indicator is standstill or moves slowly the pick up may be faulty Plug in another pick up and repeat checking Otherwise change the pre amplifier and conduct the same checking If the level indicator normally oscillates on another pre amplifier the former unit may be faulty Level Indicator LCD Screen on Pre amplifier 18 3 5 Comprehensive Inspection 3 5 Comprehensive Inspection 1 Main unit and pre amplifiers Checking the signal transmission and receive performance in radio communications D Turn on both the main unit and blue pre amplifier The symbol shown left appears on the upper section of the main unit LCD No indication shows the signals from the pre amplifier do not reach the main unit If this is your case the main unit cannot receive the signals due to environmental conditions or the pre amplifier s transmission system or the main unit s receiving system may be faulty Conduct the same checking for the red pre amplifier R is observed instead of B 2 Main unit and pick up sensors Checking the correlation D Plug the pick ups in both the blue and red pre amplifiers respectively and turn on the units Turn on the main unit Access the main menu of the main unit and select 2
53. re used Pick up input waterproof Wired control input with waterproof cap Headphone output with drip proof cap Automatic or manual mode is selected Standard STD or though THRU mode is selected The speaker and headphone outputs stereo are monitored Only the backlight is supported When there is no key input for 3 min this function works confirmation sound is generated from the speaker and headphone LCD and operation keys are backlit Self check and continuous monitor function Battery voltage When the battery voltage gets below the specified level a warning message is issued and then the equipment is turned off Pick up connection is detected Wired operation mode is detected 66 7 5 Specifications of Pick up e Input nput frequency range nput sensitivity e Signal to noise ratio e Radio communication system Transmission frequency Modulation Transmitting power Output impedance e Compatible sensor 7 5 Specifications of Pick up e Type Voltage sensitivity Applicable standard Drop resistance External dimensions Weight Power supply voltage Power supply system Output impedance 0 1 Hz to 5 kHz at THRU filter setting 100 Hz to 5 kHz at STD filter setting SOU V max 35 dB min 400 MHz band Direct frequency modulation 0 5 W 500 mW 50 Q Amplifier built in type acceleration pick up LC 2
54. relator 7 2 Principle of Leak Noise Correlator This section describes the principle of the leak noise correlator 4 Pre amplifier blue zB as El TH Leak position i L L lt lt gt D lt gt Before commencing the leak detection process the following four conditions are required 1 The leak noise is reaching the two measurement points 2 The material of the target pipe is identified 3 The bore of the target pipe is identified 4 The distance between the two pick ups is identified If any of these conditions is not met the leak position cannot be detected Calculation of leak position The leak position is close to the red pre amplifier The leak noise generated from the leak position is detected with the pick up of the red pre amplifier first The leak noise is propagating to both the blue and red pick ups The propagation speeds are identical When the leak noise is generated at a given timing and reaches the red pick up it has also traveled toward the blue pick up by distance L which is equal to the distance from leak position to red pick up The leak noise furthermore travels by remaining distance N and reaches the blue pick up Therefore an additional time equal to N divided by sound velocity is needed for the leak noise to reach the blue pick up
55. replace the batteries as well e Fuji Tecom recommends that you should prepare spare batteries to cope with the runout of battery power during the operation 16 3 3 Checking and or Replacing the Batteries Pre amplifier 2 Replacing the batteries Each pre amplifier needs six 6 commercially available size D alkali dry batteries LR20 When other batteries are used the continuous operating time of the detector will differ from the specification described herein due to difference in battery capacity Remove the battery cover take out the battery box and replace the old batteries with new ones After reinsertion of battery box be sure to remount the battery cover If those batteries that are not specified by FUJI TECOM are used and resultantly the detector fails the warranty statement will be invalid When replacing batteries be careful of their orientations Incorrect orientation will cause bursting fire and or injury Do not mount different types of batteries mixing in the battery box Otherwise bursting or leakage will occur Dispose of the replaced batteries according to your local rules and regulations Pay attention not to dispose of the battery box together with the batteries 3 4 Inspection of Pre amplifiers 3 4 Inspection of Pre amplifiers There are blue and red pre amplifiers Check both units respectively using the same procedures 1 Plug the pick up in the p
56. requency components of less than 100 Hz Therefore if even these components are collected with the pre amplifier the measurement result may be incorrect due to influence of unwanted noises 4 11 Self Check Function of Pre amplifier The pre amplifier contains the following self check functions 1 Battery voltage check the error message blinks After the pre amplifier is turned on this function works first If the battery voltage is below the specified level an error message appears on the screen and all the keys except for the Power key are disabled This function is always working and when the battery voltage gets below the specified level during the measurement the same action will be implemented 2 Pick up connection check the error message is highlighted When the pick up is still not plugged in the pre amplifier after power on an error message appears and you cannot access any other screen until the pick up is connected to the pre amplifier This function prevents faulty pick up connection 3 Cable connection check When the cable is plugged in the cable operation mode connector the pre amplifier automatically recognizes the cable and cuts the power to the radio transmitter 46 12 Forced Turn off Function 1 4 4 13 Pick up Sensor Mount Hook 4 12 Forced Turn off Function The power supply voltage is always monitored on the main unit and pre amplifiers When the battery voltage gets below the specified level
57. ry to approach the main unit The coverage of the radio communication distance between the main unit and each pre amplifier is about 750 m in the open space Try to install the pre amplifiers at higher position 4 The material bore and length Use the white noise method to calculate the unknown parameters of the pipe are not known See Section 5 3 White Noise Method for details 5 The error message does not Try to replace the batteries with new ones disappear from the pre ampli Plug in the pick up connector firmly fier 68 FUJI TECOM INC Head Office 1 3 1 Kanda Izumi cho Chiyoda ku Tokyo 101 0024 Japan Tel 81 3 3862 3196 Fax 81 3 3866 1979 Technical Development and Training Center 8 6 16 Nobidome Niiza city Saitama 352 0011 Japan Tel 81 48 479 0581 Fax 81 48 479 0584 Technical Information Telephone Service 8 6 16 Nobidome Niiza city Saitama 352 0011 Japan Tel 81 48 479 0582 69 e Parts list of Main Unit 69669669 99090 9ooogopQgoeo OVO Switch membrane LC250A14A Acrylic resin plate LC250A16A CONT Seat LC250A12A Waterproof cap for headphone jack 4 M942027 M3x8 Screw Cable connector R01 02R9 6F Cable connector cap R04 CR6 Shaft A LC250A30A Side cover right LC250A17A Fuse holder F 7155 Rocker switch JW MW 11RK Fuse M3x8 Screw M3 Hexagon Nut Battery terminal LC250A26A Battery terminal plate LC250A28A Box assembly LC250A2
58. s cessit E ee 7 2 Principle of Leak Noise Correlator 7 3 Specifications of Main Unit 7 4 Specifications of Pre amplifier 7 5 Specifications of Pick up Sensor sse Pats list of Main Unit sms Pats list of Pre amphifier cree ge lee tene Pats list of Pick up sensor aa a a List for Velocity of Each Pipe Diameter used by LC 2500 sss 49 49 51 51 56 56 57 57 58 59 59 60 61 61 62 62 63 64 66 67 68 70 72 74 76 1 System Components 1 1 Component List 1 1 Component List This leak noise correlator LC 2500 consists of the following components After you purchased the detector check the components for completeness FUJI TECOM performs a complete inspection before shipment However if you find missing component s immediately inform us of the fact Designation Quantity Main Unit 1 with battery case Pre amplifier blue and red HU eese 2 with battery case Pick Up Seri net menus 2 e Stereo Headphones sss 1 Receiving antenna Main Unit sss 1 PC soft with connecting cable s 1 LC 2100 s sensor connecting cable 2 Alkali battery 16 Shoulder strap 1 Spare fuse 2A slow blow type 1 Waist strap EMEN Pup mem xin e Aluminum carrying case e Instruction manual 1 For the correlator operated outside Japan the following components are available as the optional i
59. t is cleared and the calculation is initiated from the beginning i e SUM is reset to 0 Basically when you want to go to the next sequence such as save from the calculation process be sure to activate this pause function 2 SEARCH EPHHG 03 08 17 21 21 41 2 CORRELATION LPF 2500Hz Blue 48 3 Tm HPF 380Hz Red 51 63m NF 50Hz Td f 40ms 400 0ns JA 400 0ms 2 SEARCH D SUM 017 YZ 0 3 ZOOM UP When this menu is selected the cursor appears on the correlation waveform As a default the cursor is automatically located at the position with the highest degree of correlation You can move the cursor horizontally with left and right buttons of the CURSOR key Move the cursor when several correlation peaks are observed When the cursor is moved Td Blue and Red values are changed accordingly When 2 SEARCH is selected again the cursor disappears This menu magnifies the horizontal axis of the correlation waveform 4 ZOOM DOWN This menu reduces the horizontal axis of the correlation waveform 5 0 STATUS SETUP This menu allows you to enter into the condition setup screen 6 1 PIPE DATA SETUP This menu allows you to enter into the pipe condition setup screen 7 SANE This menu saves the measured leak position data to the internal memory 8 EVALUATION This menu will be discussed in Chapter 5 Practice 36 4 7 Menu on Main Unit 3 WHITE NOISE gt Blade 02
60. t metal washer Waterproof packing for headphones 4 MP142033 Fuji Tecom seal 4 MP142041 Battery cover packing 4 MP142051 Rubber cover Bottom 4 MP142002 Rubber cushion 4 MP142032 Snap latch C 10 5 Packing for snap latch 4 MP142053 Battery cover 4 MP142028 0000000000000006000000000900000 M2x5 Screw Power unit G 02 010 Transmitter unit G 02 009 P U unit G 02 011 Battery box Rear cover for pre amplifier 1 MP142024 M3x5 Screw Serial number seal for pre amplifier Waterproof net for speaker 4 MP142043 M2x5 Screw LCD M3x3 Screw Module fixing plate 3 MP142027 Rocking card spacer KGLS 18RT Control board Terminal cover 4 MP142020 M3x10 Screw Battery terminal 4 MP142031 Pressure terminal M3x3 Screw Battery box case 2 MP142025 M3x5 Screw Fastening lug for speaker 4 MP142028 Speaker with spearker cushion Fastening plate for speaker 4 MP142030 Battery box case cover 3 MP142026 M3 Rug terminal M3x5 Screw M3x3 Screw Rubber cover Top 2 MP142001 Hook for P U 4 MP142054 49 249 d 29 n F and a H an 0000 O e Pre amplifier 73 e Parts list of Pick up sensor 9666698609969 9googoeo eoo9o9000 Magnet Base Under Rubber Cover Filter M4x8 Screw Filter Holder Cushion Thermal Shrinkage Tube 35 Element Plate O Ring Element Care Label Element Case PCB O Ring Element C
61. tems if circumstances require Battery charger 1 e Battery Battery pack for main unit composed of four size D Ni Cad batteries 1 ea Battery pack for pre amplifiers composed of six size D Ni Cad batteries 2 ea 2 Equipment Description 2 1 Panel and Switches Main Unit 2 1 Panel and Switches Main Unit 1 Front panel 000 2e gt ij Light Monitor RD Le Ole CURSOR key Moves the cursor up down right or left Q Light key Turns on off the backlight for membrane switches and LCD 3 Monitor key Changes the output style to the headphone set Blue Red or Stereo can be set Delete key Deletes the data input 5 Escape key Returns to the previous screen Enter key Confirms the menu and setting Antenna connector A receiving antenna is mounted here LCD You should make an operation through this screen 9 Numeric key Enters numerical data and selects items 2 1 Panel and Switches Main Unit 2 Right panel 0 Cable connector red To use the unit in the cable mode plug in the red pre amplifier here Cable connector blue To use the unit in the cable mode plug in the blue pre amplifier here 3 Power switch Turns on the unit 3 Fuse Protects the unit from over current I
62. terial Material Bore mm Sound velocity m s Ductile iron pipe DIP 75 1500 1341 1039 Vinyl chloride pipe PVC 13 600 622 344 Polyethylene pipe LDPE 10 50 314 Polyethylene pipe HDPE 10 50 314 311 B E ise 02 04 18 11 57 08 Select 3 WHITE NOISE from the main menu The screen 3 WHITE NOISE 0 PIPE LENGTH case Therefore estimate the sound velocity from the material shown left appears Both bore and length are unknown in this and enter the estimated value bem Select 1 VELOCITY 2 RUN 02 04 18 14 05 46 The screen shown left appears Enter the estimated sound velocity Select 18 DIRECT from 3 1 0 Pipe Material IZE VELDGLIY i 3 1 0 18 INPUT VELOCITY VELOC I TYE s 55 4 Leak Noise Record Function 5 5 5 5 Evaluation of Detected Position The calculated length is displayed in the field of Access the pipe data input screen and enter the value as pipe length Caution The distance L is calculated from the estimated sound velocity and therefore L is an approximate value 5 4 Leak Noise Record Function You can record and replay the leak noise data collected with pick ups In addition the frequency analysis can be executed using the waveform monitor function This means that during the record or replay process you can access the result of frequency analysis on the waveform monitor screen while
63. the operation of the equipment becomes unstable and resultantly the accurate measurement might not be continued If the battery voltage gets below the certain reference level the equipment is forcibly shut down When this shutdown occurs the LCD is turned off Replace the batteries with new ones Forced turn off threshold main unit Less than 4 0 V Forced turn off threshold pre amplifier Less than 6 0 V 4 13 Pick up Sensor Mount Hook When you move on the site the pick up can be engaged to the pick up mount hook as shown below 7 RE 47 4 14 Listening with Headphone 4 14 Listening with Headphone After the headphone is connected to this main unit and pre amplifiers you can listen the noise captured by the pick ups After plugging in the headphone jack press the Speaker key N CAUTION When listening the noise with the headphone use complete care so that you will not hurt your ears 48 Main Unit gt 5 Practice 5 1 Pipe Data Handling Main Unit 5 1 Pipe Data Handling Red pre amplifier R 4 9m Blue pre amplifier B DIP75 41m This section describes the data handling based on the example where three different types of pipes exist as shown above To detect the leak position based on the multiple pipe data sets as shown in this example be sure to enter the data starting from the blue pre amplifier Up to six pipe data sets A
64. to F can be input 5T 3ms Total 49 40m 1 0 2 PIPE LENGTH LENGTH For the data input procedure see the relevant section in this manual The table below lists pipe materials and bores Material Young s modulus Mpa Material Young s modulus Mpa DIP 157000 HDPE 823 CIP 117500 PE MAINS 784 ACP 23500 SP 191000 PVC 3000 COP 124500 LEAD 15200 GALV GP 210000 LDPE 215 49 5 1 Pipe Data Handling Adding the pipe data Er 02 09 27 10 81 2T 1 0 DATA INPUT PIPE Blue A LDPE IP SIZE LENGTH 20 0mm 3 50m T5 0 Red 41 7ms Total 0 2 PIPE LENGTH LENGTH 44 B50m BN G 02708727 10 88 08 1 0 DATA INPUT PIPE SIZE LENGTH Blue AiL 20 0nm 3 50m Red 41 7ms Total 0 1 PIPE SIZE 0 75 0mm 44 50m Deleting the pipe data E G 02708727 10 88 21 1 0 PIPE DATA INPUT PIPE SIZE LENGTH Blue A LDPE 20 0nm 3 50m RN TS Omm 41 00m 1 Tms Total MATERIAL 44 50m To add the pipe data be sure to select PIPE DATA EDIT When PIPE DATA INPUT is selected new data input mode becomes active and resultantly the data already input is deleted To add another pipe to C in the condition shown left press the Enter key or CURSOR key The cursor moves to the Material field of C To change the pipe data be sure to select PIPE DATA EDI
65. truments for the location of underground utilities and water leaks FUJI TECOM inc Head office 1 3 1 Kanda Izumi cho Chiyoda ku Tokyo 101 0024 Japan TEL 81 3 3862 3196 81 3 3866 1979 Web Site http www fujitecom co jp E Mail kaigai fujitecom co jp Branch office Sapporo Sendai Tokyo Shinetsu Nagoya Osaka Hiroshima Kyushu Technical development amp training center Niiza
66. tup Selects automatic or manual setup When the automatic mode is selected the main unit internally processes the signals sent from the pick ups and select suitable low pass and high pass filters and or notch filter When the manual mode is selected you should select suitable low pass and high pass filters and or notch filter from the table 0 1 2 Notch Filter Cuts the commercial frequencies and their harmonics 0 2 Calendar and Time Setup Specifies the calendar year month and day and time 1 PIPE DATA SETUP You can enter or change the pipe data and execute leak detection 1 0 Pipe Data Input Specifies the material bore and length of the pipe 1 0 0 Pipe Material You should select the appropriate pipe material from the table 1 0 0 11 etc When the pipe material is unknown you can directly enter the sound velocity or calculate the sound velocity from the external bore wall thickness and Young s modulus of the pipe 1 0 0 11 1 2 Metal Pipe or Resin Pipe You should select metal or resin pipe to calculate the sound velocity 1 0 0 11 3 4 5 Save to etc1 2 3 You can save the calculated sound velocity to etc1 2 or 3 1 0 0 12 13 14 WHITE1 2 3 Sound velocity calculated by the white noise method 1 0 0 15 16 17 etc1 2 3 Calculated sound velocity for metal or resin pipe 1 0 1 Pipe bore You should select the appropriate pipe bore from the table 1 0 1 20 Sound Velocity Input You can directly enter the sound ve
67. valuation function Rank Waveform monitor function Display channel Frequency range Monitor screen data memory Record and replay function Record channel Replay channel Recorded data memory Replay Note function Input character e Time count function Contents Accuracy monthly error Memory backup function Backed up device Retention time Backup battery Key operation confirmation function Backlight function Backlit device Monitor function Headphone output Continuous monitor function Item The delay time is automatically set according to Td max displayed on the pipe condition input screen A B and C 2 1 KHz 2 5 kHz 5 kHz common to both channels Measurement conditions calendar and time and operation result can be saved by 50 data sets for blue and red pre amplifiers respectively i e 100 data sets in total 2 12 Measurement conditions calendar and time and recorded 16 second noise can be saved by 4 data sets The recorded noise can be listened with headphone set or displayed on the waveform monitor ASCII codes Year month day hour minute and second 24 hour mode 1 min at 25 SRAM memory and real time clock Approx 2 5 months at 25 C Secondary vanadium lithium coin battery confirmation sound is generated from the buzzer built in the equipment and headphone LCD and operation keys Selectable from Blue Red

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