User Manual
Contents
1. FISHE 228 XLT 17 Liquid Leak Detector Operating Manual CONTENTS A OCMC IO I area E E A E pg 2 TO A SSM E E AE teen pg 3 4 ONION ONG AI pg 5 6 OPS VS CONS airs nsec AAA AAA DG 7 Use of the INAS 61S Ol cceazesceastencseacqnsssecceastdiedatoasdeccasavdesaseset cos og 8 DOC IC ONS AAA og 9 10 WY UN ONT aa Back Cover INTRODUCTION ii ii ii iii ii ii iia ai Fisher Research Laboratory has always been a leader in the field of acoustical leak detection From the early LT 10 through the XLT 30 high quality sound amplification has been synonymous with the Fisher name Fishers XLT 17 takes leak detection to a new level The ultra sensitive Multi Sensor combined with high performance electronics and crystal clear audio headphones provide a new standard for leak detection equioment INSTRUMENT SET INSTRUMENT SET 1 Control Box All listening and filtering controls for the XLT 17 are contained in this sturdy housing The function of each control is described in the section entitled Control Panel 2 Multi Sensor Fisher s MULTI SENSOR has superior leak detection capabilities In an extremely compact design the MULTI SENSOR provides better sensitiv ity to leaks improvs audio clarity improvs sensor electronics and less interfering background noise The MULTI FSENSOR is used for both the ground microphone and direct contact applications the one sensor that does it all 3 Sound Rods Two different2. sizes are included with the XLT 17 Rods give the user vari ous lengths for direct or indirect contact to pipes 4 Multi Sensor Handle This handle is Used with the Multi Sensor 5 Sensor Cable This cable attaches at the back of the Control Housing to any of the various sensors including the Multi Sensor Make sure the jack is fully inserted and the lock nut is hand tightened 6 Headphones These headphones are designed to deliver the clearest sound with the least distortion The Volume knob can be used to adjust the audio level Unplugging the headphones will turn off the XLT 17 When the XLT 17 is turned off any modifications to the Volume and Filter will remain at last settings 7 Carrying Strap Housing Mounting Bracket The attachment system for the XLT 17 consists of a plastic mounting bracket that slides from the bottom of the control housing up to the bezel around the faceplate There are two slots for attaching an adjustable strap that hangs around the neck of the user a CONTROL PANEL ee AA Aa e ee 0246 8 10 POWER This keypad turns the XLT 17 on or off When the instrument is turned off all settings are stored in memory and retained for the next time the XLT 17 is turned on VOLUME ARROW KEYPADS Press Volume arrow keypad to modify the volume and sensitivity of the XLT 17 The arrow keys Up arrow down arrow increase or decrease the audio signal to the headphones Use the headphone volume knob to redu
3. ce audio as desired MUTE As the name applies muting disengages the sound to the user There is also a control on all listening microphones This keypad should be pressed when the sensor is moved to prevent excessive noise to your ears FREQUENCY ARROW KEYPADS These keypads allow the frequency range of the XLT 17 audio filters to be modified 5 ONTROL PANEL FILTER The XLT 17 has four different filtering modes AL All Frequencies This is the No Filter feature of the XLT 17 No modifications to the audio can be made with the arrow keys Frequency range of the All Frequency setting Is from 60 Hz to 6 KHz This mode is offen used to begin fo listen for the leak noise The following filter modes are often used to pinpoint the location of the leak noise HI High Range This filtering mode allows the user to adjust the response in the higher areas of the frequency range Use the arrow keys to increase or decrease this frequency response range LO Low Range Similar to the previous filter mode the lowpass filter allows the user fo listen to the lower areas of the frequency range The arrow keys are used to increase or decrease this frequency response range FC Frequency Choice This filter could also be called Frequency Select This mode allows tuning to the frequency that gives the user the best audio response to the leak noise The arrow keys are used to move the cursor selecting a narrow frequ
4. ency band of choice OPERATING INSTRUCTIONS Set Up 1 Assemble control housing headset and Multi Sensor The headset must be plugged in for the XLT 17 to operate 2 Familiarize yourself with the location of the mute keypad Remember to mute the XLI 17 when moving any sensor 3 Press POWER keypad to turn on the XLT 17 The XLT 17 goes through a five second warm up before the touch pads are functional During this time the display screen gives information of battery level A battery reading under 5 volts will activate the Low Battery indicator The XLT 17 allows some time between the Low Battery indicator and complete system shut down to allow you to complete a job 4 The XLT 17 always turns on to the last settings used 5 Press the VOLUME arrow keys to modify headset volume Use the AR ROW keypads to increase or decrease the volume The display screen will show the volume level in a graph form 6 Begin your leak detection search Modifications During Leak Search Some leaks are small in size and unrecognizable or conditions are such that very little leak sound can be recognized so you may need to make changes to the filter s in order to hear leaks Depending upon the type of pipe composition and soil ground type different filter settings will increase your ability to hear the leak sound Adjustment to the filter is done by pressing the FILTER keypad which will allow you to scroll through four different filte
5. er on the T Handle assy Sound rod lengths will be determined by its application SPECIFICATIONS Subject to improvement or modification without notice Operating Frequency 60 Hz 6 KHz Gain 60 db 20 Hz 60 Hz Gain gt 55 dB Filter Tyoes and Frequency Ranges AP 60 Hz to 6 KHz LOW POSS ereinen Adjustable cut off frequency from 150 Hz to 2 4 kHz PUG POSS sreo Adjustable pass band frequency from 150 Hz to 2 4 kHz BONA POG Ss r Adjustable center frequency from 150 Hz to 2 4 kHz Output Indications AUGO ia High performance headphones 64 ohms VASO Glasner LCD bargraph and 2 digif numeric display Grade of Protection Splash Proof Battery TeSst Automatic real time battery level indicator Battery Quantity Type Two 9 Volt alkaline Battery Life 50 Hours approximate Carrying Case Dimensions 21 x 6 x 14 WOONT WA 10 Ibs STANDARD EQUIPMENT Hard Carrying Case Operation Manual Control Unit Headphones Muti Sensor Carry Strap Housing Bracket Sound Rods Fisher Research Laboratory does not warrant suitability to specific use Fisher Research Laboratory shall in no event be liable for any direct incidental conse quential or indirect damages NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmfu
6. l interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equioment does cause harmifill interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try and correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Pollardwater com THE PROFESSIONAL S CHOICE www pollardwater com TOLL FREE 800 437 1146
7. r types Frequency range modifications can be made to the HI LO and FC filters As you are choosing your filfer the display screen will give a visual display of the filter tyoe being used and the frequency range of that filter After your selection and modification is made theunit will automatically return to the operating mode after a 5 second delay Use of the Multi Sensor The multi sensor was designed for locating leaks in all types of surface conditions The new sensor construction will allow leak detection to be performed on hard surfaces such as concrete asphalt tile etc as well as listening to water leaks Under turf or ae soft surfaces On hard surfaces the muti sensor sensor is used to pick Up the vibrations generated by a buried ruptured pipe located Underneath sidewalks or paved streets The rubber housing diaphragm is designed to reduce external sounds while the sensor rests on a hard surface and detects the vibrations traveling underground When utilizing the multi sensor for direct connection to a pipe or listening to buried pipes located in soft ground or under a turf surface you will need to use the T Handle and sound rods included with the unit Using a threaded soacer provided on the extension handle carefully attach it directly onto the Multi Sensor Assemble the T Handle by snapping both the extension handle and sensor handle sections together Sound rods are then secured to the threaded coupl
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