M-97. Operating Manual. Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride

Transcription

1 Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride M-97 Valve, Pedestal & Box Locator P E R F O R M A N C E The worldwide underground utility industry relies on Fisher. Our instruments are durable, dependable and locate deeper. R E P U T A T I O N Fisher produced the first patented metal detector in For over 80 years, the Fisher logo has been a mark of excellence. 2 - YEAR LIMITED WARRANTY Proof of purchase is required to make a claim under this warranty. NOTE TO CUSTOMERS OUTSIDE THE U.S.A. This warranty may vary in other countries, check with your distributor for details. Warranty does not cover shipping costs. S E R V I C E Should you have any questions or problems, contact: FISHER RESEARCH LABORATORY 1465-H Henry Brennan, El Paso, Texas Tel Fax info@fisherlab.com According to FCC part Changes or Modifications made to this device not expressly approved by the party responsible for compliance could void the users authority to operate this equipment Rev Operating Manual

2 CONTENTS About Your M-97...pg. 2 Features...pg. 3 Setting Up...pg. 3 Controls...pg. 4 Using Headphones...pg. 5 Tuning...pg. 5 Searching...pg. 6 Specifications...pg. 7 Warranty... Back Cover ABOUT YOUR M-97 Using ideas that you, our valued customers, have passed on to us, the M-97 Valve and Box Locator stands as the new and improved addition to our line of highly successful M-95 and M-96 Locators. The M-97 is an all-metal metal detector that can search through concrete and asphalt and was designed for finding buried or paved over valves, boxes, or manhole covers, or any other concealed metallic object. It also locates targets made of aluminum, brass and lead. Please remember, like all Valve and Box Locators, the M-97 is a Metal Detector which should not be used as a substitute for a Utility Line Tracer. Fisher Research Laboratory manufactures a complete line of equipment for Line Tracing (Pipe and Cable Tracing). New to the M series is the ease with which the M-97 can be stored. Just compact the lower stem, twist the search coil 90 degrees, and fold the search coil flat. The M-97 fits easily into the optional carrying case. In the Fisher tradition, the M-97 is affordable, tough, and simple to use while providing maximum performance. A two year limited warranty comes standard with the unit. SPECIFICATIONS Subject to improvement or modification without notice. Output Frequencies of search coil khz Sensitivity mv RMS for full scale Sensitivity Adjustment Range... 12:1 Output Indication. Meter 1 milliamp, linear scale... Speaker ohm impedance... Headset (optional)... 8-ohm impedance... Audio Frequency Hz Power Supply +9V supplies:... (2) 9V batteries Battery Life Alkaline hours Power Consumption... (-9V) 13.8 ma... At min. sound 8 ma... At max. sound 50 ma... At Audio threshold 17.5 to 18.5 ma Search Coil Configuration... Double-D Weight with 8-inch search coil lbs. (1.5kg) 11-inch search coil lbs. (1.8kg) Dimensions to 50 inches adjustable (96 to 127 cm) Shipping Dimensions 6 x 13 x 35 (15.12 x x 82.2 cm) Fisher Research Laboratory does not warrant suitability to specific use. Fisher Research Laboratory shall in no event be liable for any direct, incidental, consequential or indirect damages. Optional ACCessories: Heaphones Coil Covers 11 search coil Hard carrying case Vinyl carrying bag 7

3 SEARCHING It is a good idea to establish a methodic search pattern. Avoid swinging the M-97 like a golf club, swing the detector side to side keeping the search coil the same distance above the ground. Your sweep pattern should be a slow, half-circle motion. If you are searching for a small target, it is a good idea to overlap your sweeps. When the detector s search coil starts to pass over a metal object, the sound will increase and the meter readings will increase. Depending upon the size and depth of the target, the target may appear (respond) to be larger than it should. To get a visual outline of the target, you need to reduce the sensitive of the M-97 by raising the coil and passing over the target. This can help establish the edges of the target. Another method that will give a visual outline is to purposely detune the M-97. Move the coil away from the target. Slowly bring the search coil toward the target. As the sound increases, press and release the Retune Button. Continue to move the coil toward and eventually over the target. The sound and meter readings will be more responsive as the search coil passes over the target. You may need to repeat this step more times if the target is at a shallow depth. Be aware that you can loose responsiveness of the target by over reducing the Tuning Control (sensitivity) of the M-97. To reset the M-97 back to the balanced settings, lift the search coil off the ground, and away from any metallic objects and press and release the Retune Button. The M-97 will automatically retune to the original, balanced settings. FEATURES Two knobs and a pushbutton for simple operation Adjustable shaft with double locking stem Ground Effect Rejection VLF eliminates annoying or false signals from wet ground foliage, pavement or mineralized ground High sensitivity for maximum penetration through soil, asphalt or concrete Built-in Battery Test Pushbutton Tuning to quickly & easily maintain optimum sensitivity Ultra Slow Auto-Tune to stabilize ground tuning and minimize frequency drift Identifies metallic objects by speaker sound and needle movement Compact size for convenient storage Waterproof search coil SETTING UP The M-97 comes ready to use. Extend the lower stem of the M-97 so that the search coil rests between 6 to 12 inches in front of your feet. Your arm should be straight and relaxed with your grip held loosely. Tighten the locking nut/compression nut at the bottom of the upper stem. When the proper length is selected, the excess cable should be wound around the stem. This can be done by slightly loosening the locking nut and turning the lower stem, or by removing the search coil and winding the cable by hand. Be sure to leave some slack in the cable. Check the batteries by turning the Mode control to Battery Test position and turning the Ground control to any number. A reading between 80 and 100 indicates the batteries are OK. *With the 11 coil you must slide the lower stem completely out of the upper assembly for the M-97 to properly fit in the hard carrying case. 6 3

4 CONTROLS USING HEADPHONES Meter The meter of the M-97 serves two purposes for the operation of the instrument. When used in the battery test mode, the meter gives a visual indication of the battery strength. A reading between is desirable. If the reading is below 80, search depth and accuracy can decrease. Please change the batteries, if M-97 Control Panel necessary. (Note: The batteries must be inserted correctly for the M-97 to operate. Match up the correct battery terminals with the markings on the inside of the battery holder. Failure to do so will not damage the instrument, however, the instrument will not function). When searching with the M-97, the meter gives a visual indication to any change occurring in the field of detection. This is primarily due to the coil passing over or near a metal object, but can occur when the ground mineral conditions change. On/Off Ground Rejection Control This control turns the M-97 on and off. It is used to electronically balance the M-97 to compensate for the natural mineral content of the soil or ground surface. When tuned properly, raising and lowering the search coil above the ground will not cause a change in the meter reading or audio tone. Mode Switch This control is used to change the mode function of the Locator. Battery Test With the detector turned on, the Battery Test mode will indicate battery strength. This is a no-load battery test. Normal This setting is used for the Turn On and Go mode. The Normal Mode requires very little Ground Rejection adjustment. Using headphones (not included) improves battery life, and prevents the sounds from bothering bystanders. It also allows you to hear subtle changes in the sound more clearly, particularly if searching in a noisy location. For safety reasons, do not use headphones near traffic or where other dangers are present. This device is to be used with interconnecting cables/headphone cables shorter than three meters. TUNING THE M-97 There are two methods to tune and balance the M-97. One method is for quick and easy operation; the other will allow you fine tune the detector for deeper searching and greater sensitivity. Turn On and Go Method Select an area that is free of metal near and under the search coil. Turn on the M-97 by setting the Mode control to Normal and Ground control to the position 5. (Hint: If the M-97 is loud sounding when the instrument is turned on, press and release the Retune Button to quiet the instrument). Raise the search coil about 12 to 18 inches above the ground (dirt, concrete, asphalt, etc.), and press and release the Retune Button. Lower the coil close to the ground. There should be little or no change in the tone of the detector. If the M-97 changes tone when the coil is lowered to the ground, there is either a metallic object near the coil that is causing the instrument to respond, or the soil conditions are such that the M-97 needs to be more precisely balanced. Proceed with locating your targets. Precision Tuning Method (This method can be used for the Normal setting, and must be used for the High setting). Select an area that is free of metal near and under the search coil. Turn on the M-97 by setting the Mode control to Normal and Ground control to the position 5. Raise the search coil about 12 to 18 inches High above the ground (dirt, concrete, asphalt, etc.), and press and release This setting is used for increasing the sensitivity of the M-97,which also the Retune Button. Note any change of sound. If there is no change, or increases the depth searching capabilities of the instrument. only a slight change, the M-97 is balanced and ready to search. If the sounds changes: Sound increases Slightly decrease the Ground Retune Button setting. Repeat above procedure. Sound decreases Slightly increase When this button is depressed, the instrument will rebalance itself to the the Ground setting. Repeat above procedure.repeat until no (or a instrument settings and prevailing ground conditions. slight) change of sound occurs. 4 5

5 Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride P E R F O R M A N C E Treasure Hunters worldwide rely on Fisher. Our detectors are durable, dependable, and search deeper. R E P U T A T I O N Fisher produced the first patented metal detector in For over 70 years, the Fisher logo has been a mark of excellence. 2 - YEAR LIMITED WARRANTY Fisher believes in the products we produce and backs this belief with a 2 year limited warranty, Warranty may vary outside the United States. See your dealer for details Proof of purchase is required to make a claim under this warranty. NOTE TO CUSTOMERS OUTSIDE THE U.S.A. This warranty may vary in other countries, check with your distributor for details. Warranty does not cover shipping costs. According to FCC part Changes or Modifications made to this device not expressly approved by the party responsible for compliance could void the users authority to operate this equipment. S E R V I C E Fisher is committed to providing you, our valued customer, with superior service. Each and every instrument is rigidly tested and carefully inspected during assembly and before shipment. Should you have any questions or problems, contact: FISHER RESEARCH LABORATORY 1465-H Henry Brennan, El Paso, Texas Tel Fax info@fisherlab.com Rev XLT-17 Liquid Leak Detector Operating Manual

6 CONTENTS Introduction...pg. 2 Instrument Set...pg. 3-4 Control Panel...pg. 5-6 Operating Instructions...pg. 7 Use of the Multi-Sensor...pg. 8 Specifications...pg Warranty... Back Cover INTRODUCTION 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 equipment. 2

7 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 harmful 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 equipment does cause harmfill 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. INSTRUMENT SET

8 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 sensitivity to leaks, improvs audio clarity, improvs sensor electronics, and less interfering background noise. The MULTI-SENSOR is used for both the ground microphone and direct contact applications the one sensor that does it all. 3. Sound Rods Two different sizes are included with the XLT-17. Rods give the user various 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. SPECIFICATIONS Subject to improvement or modification without notice. Operating Frequency 60 Hz 6 khz, Gain = 60 db 20 Hz 60 Hz, Gain > 55 db Filter Types and Frequency Ranges: All Pass:...60 Hz to 6 khz Low Pass:...Adjustable cut-off frequency from 150 Hz to 2.4 khz High Pass:...Adjustable pass band frequency from 150 Hz to 2.4 khz Band Pass:...Adjustable center frequency from 150 Hz to 2.4 khz Output Indications: Audio...High performance headphones (64 ohms) Visual...LCD bargraph and 2-digit numeric display Grade of Protection...Splash Proof Battery Test...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 Weight:...10 lbs 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, consequential or indirect damages. 4 9

9 Use of the Multi-Sensor CONTROL PANEL 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 soft surfaces. On hard surfaces, the mutisensor 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. POWER 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 spacer 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 coupler on the T- Handle assy. Sound rod lengths will be determined by its application. 8 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 reduce 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

10 CONTROL 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 often used to begin to 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 to 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 frequency 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 XLT-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 filter types. Frequency range modifications can be made to the HI, LO, and FC filters. As you are choosing your filter, the display screen will give a visual display of the filter type 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. 6 7

11 XLT-30 Acoustical Leak Detector OPTION A with BIG FOOT OPTION B with NEW MULTI-SENSOR OPTION C with LITTLE FOOT Operating Manual F I S H E R R E S E A R C H L A B O R A T O R Y

12 CONTENTS Introduction...pg. 2 Headphones...pg. 2 Instrument Set...pg. 3 Control Panel...pg. 6 Operating Instructions...pg. 8 Use of the Multi-Sensor...pg. 9 Specifications...pg. 11 INTRODUCTION 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-30 takes leak detection to a new level. Ultra sensitive sound microphones, combined with a non-distortion amplification system and crystal clear audio headphones make the XLT-30 the leak detector destined to set new standards for the leak professional. USING HEADPHONES Using headphones (not supplied) improves battery life, and prevents the sounds from annoying bystanders. It also allows you to hear subtle changes in the sound more clearly, particularly if searching in a noisy location. For safety reasons, do not use headphones near traffic or where other dangers are present. This device is to be used with interconnecting cables/headphone cables shorter than three meters. 2

13 INSTRUMENT SET OPTION A OPTION C 7 2A OPTION B 2B 1 1 5A 4 3

14 INSTRUMENT SET 1. Control Box All listening and fi ltering controls for the XLT-30 are contained in this sturdy housing. The function of each control is described in the section entitled Faceplate and Controls. 2. Big Foot Sensor - OPTION A Also known as the Ground Microphone, this sensor is to be used on hard surfaces, concrete, asphalt, tile, etc. A fl exible rubber shield helps prevent outside sounds from interfering with the sounds from the buried pipe. Press and hold the red button near the handle to mute the audio from the probe and suppress loud sounds when the probe is moved. 2A. Little Foot Assembly - OPTION C About the size of a computer mouse, this small handheld sensor is designed for areas that the Big Foot Sensor can not fi t into. The Little Foot assembly is normally used for leak detection inside buildings. Mute is activated by pressing the button in front of the Little Foot Assembly. 2B. Multi-Sensor - OPTION B Fisher s new MULTI-SENSOR has superior leak detection capabilities. In an extremely compact design, Fisher has achieved higher performance, improved audio clarity, improved sensor electronics, and better sensitivity to leaks with less background noise all with heavy duty characteristics of the trusted Big Foot. The MULTI-SENSOR is used for both the ground microphone and direct contact applications the one sensor that does it all. Fisher s NEW XLT-30 MULI-SENSOR combo sets the new standard for leak detection. 3. Hydrophonic Cylinder Probe This probe is a direct contact probe designed to make direct connection to the pipe, or any portion of the pipe that is accessible. Used in any combination of Sound Rods with the T-Handle, pipes can be accessed to distances up to nearly 6 feet away. Another feature of the Cylinder Probe is the ability to listen to pipe noise in pipes that are buried in turf, or soft surfaces. Accurate pipe location is essential for the placement of the Ground Rods as close to the pipe as possible. On top of the Cylinder Probe is a three position toggle switch for mute, listen, and momentary listen. As with all mute controls, learn to use them wisely. When tightening the sounds rods to the Hydrophonic Probe, secure the connector with a wrench as to not let it twist. Twisting of that connector could damage wiring on the inside of the probe. 4

15 INSTRUMENT SET 4. Sound Rods Two different sizes are included with the XLT-30. Rods give the user various lengths for direct or indirect contact to pipes. 5. T-Handle This handle is used primarily with the Cylinder Probe and the sound rods. 5A. Multi-Sensor Handle This handle is used with the Multi-Sensor 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-30. When the XLT-30 is turned off, any modifications to the Volume, Notch, and Filter will return to the factory presets. 7. Probe Cable (Option A & C) This cable attaches at the back of the Control Housing to any of the various probes. Make sure the jack is fully inserted and the lock nut is hand tightened. 8. Carrying Strap/Housing Mounting Bracket The attachment system for the XLT-30 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. 5

16 CONTROL PANEL POWER This pad turns the XLT-30 on or off. When the instrument is turned Off, all settings, or modifications to settings default to the preset factory settings. LIGHT Press Light pad to turn the back light on or off. Prolonged use of the back light will have minimal effect on the battery life of the XLT-30. VOLUME Press Volume pad to modify the volume of the XLT-30. The arrow keys (up arrow/down arrow) increase or decrease the volume to the headphones. Use the headphones volume knob to reduce audio as desired. NOTCH This control allows the user to mask or reject a small range of frequency response. Its purpose is to eliminate a sound (i. e. motor, humming, fans, etc.) that may be interfering with the leak sound. The notch setting can be moved with the arrow keys. FILTER The XLT-30 has four different filtering modes. AL (All Frequencies) This is the No Filter feature of the XLT-30. No modifications to the signal can be made with the arrow keys. Frequency range of the All Frequency setting is from 60 Hz to 6 khz. 6

17 CONTROL PANEL (The following filter modes have a frequency range from 60 Hz to 2.4 khz) 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 to 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 response. The arrow keys are used to move the cursor, selecting a narrow frequency band of choice HOLD/MUTE This dual purpose button is both a mute control and a peak hold reset control. Mute As the name applies, muting disengages the sound to the user. There is also a control on all listening microphones. Learn to use this control to prevent excessive noise to your ears when the probes are moved. Hold The display of the XLT-30 will show the highest sound level recorded. This reading can be reset by pressing this pad. Resetting the Peak Hold clears earlier readings of the Peak sound. Arrow Keys These keys allow features of the XLT-30 to be modified. RESUME After any modification has been made to the XLT-30 (VOLUME, NOTCH, or FILTER), depressing the RESUME will return the display screen back to a Meter function (Sound Graph). 7

18 OPERATING INSTRUCTIONS Set Up 1. Assemble control housing, headset, and your choice of listening probe. The headset must be plugged in for the XLT-30 to operate. 2. Press POWER pad to turn On the XLT-30. The XLT-30 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 reading of 68 or below will activate the Low Battery indicator. The XLT-30 does have a usage buffer between the Low Battery indicator and complete system shut down to allow you to complete a job. 3. The XLT-30 always turns on to the default settings. Volume is at the medium setting, filter is in the All Pass (no filter) mode, and the notch control is at the midway point. The display screen will show the sound intensity in a bar graph form (Sound Graph) and two digit display. 4. Familiarize yourself where the mute buttons (and pad) are. Remember to mute the XLT-30 when moving any probe. 5. Press the VOLUME pad to modify headset volume. Use the ARROW pads to increase or decrease the volume. The display screen will show the volume level in a graph form. Press the RESUME pad to exit volume modification and return the display screen to the Sound Graph function. (Remember that the volume can be adjusted at the headphones also.) 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 pad which will allow you to scroll through four different filter types. Frequency range modifications can be made to the HI, LO, and FC filters. As you are choosing your filter, the display screen will give a visual display of the filter type being used, and the frequency range of that filter. After your selection and modification is made, depress the RESUME pad to return to the Sound Graph function of the display screen. 8

19 OPERATING INSTRUCTIONS Use of the Notch Filter Occasionally, you may come across a sound that may be masking or covering your ability to adequately hear any leaks. This may be caused by nearby motors, fans, or many other annoyances. (Unfortunately, the most common are sounds caused by automobiles and traffi c). The XLT-30 has a notch, or reject feature, that will assist in eliminating that sound from your frequency range. Press the NOTCH pad, and use the ARROW pads to move the cursor to the point where the annoying sound is eliminated or at its weakest. Depress the RESUME pad to set the notch function. (Hint: Depress the FILTER pad to go directly to the FILTER mode. Now you can choose the type of Filter you wish to use AND still have the annoying sound Notched). Use of the Multi-Sensor (OPTION B) Unlike our other sensor, this new 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 soft surfaces. On hard surfaces, the mutisensor sensor is used to pick up the vibrations generated by a buried ruptured pipe located underneath sidewalks or paved streets. The rubber h o u s i n g d i a p h r a g m i s designed to reduce external sounds while the sensor rests on a hard surface and detects the vibrations traveling underground. 9

20 USE OF THE MULTI-SENSOR (OPTION B) 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 spacer provided on the extension handle, carefully attach it directly onto our sensor probe. Assemble the T- Handle by snapping both the extension handle and probe handle sections together. Sound rods are then secured to the threaded coupler on the T- Handle assy. Sound rod lengths will be determined on its application. SPECIFICATIONS 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 harmful 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 equip ment does cause harmfi ll 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. 10

21 SPECIFICATIONS Subject to improvement or modification without notice. Operating frequency: 60 Hz 6 khz, Gain = 95 db 20 Hz 60 Hz, Gain > 90 db Filter types and frequency ranges: All Pass: 60 Hz to 6 khz Low Pass:... Adjustable cut-off frequency from 150 Hz to 2.4 khz High Pass:... Adjustable pass-band frequency from 150 Hz to 2.4 khz Band Pass:... Adjustable center frequency from 150 Hz to 2.4 khz Notch Filter:... Adjustable center frequency rejection from 150 Hz to 2.4 khz Can be used simultaneously with any filter option Indication of output: Audio:... High performance head phones (64 ohms) Visual:... LCD bar graph display w/2 digit numerical read out. Grade of protection:... Splash proof Battery test... Automatic Type of Battery/Quantity... Alkaline 9 volt, 2 Battery life:... Approximately 50 hours Weight: Option A Option B Option C 19 lbs 10 lbs 9.5 lbs Accessories: Option A Option B Option C Little Foot Big Foot Big Foot Multi-Sensor Hydrophonic Cylinder Probe Multi-Sensor Little Foot Standard equipment: Option A Option B Option C Plastic case Plastic case Plastic case Operation manual Operation manual Operation manual Control unit Control unit Control unit Head phones Head phones Head phones Big Foot Multi-Sensor Little Foot Hydrophonic Cylinder Probe Carry Strap Hydrophonic Cylinder Probe T Handle Housing Bracket Probe Cable Assembly Probe Cable Assembly Probe Cable Assembly T Handle Carry Strap Sound Rods Carry Strap Housing Bracket Housing Bracket Sound Rods 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, consequential or indirect damages. 11

22 Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride P E R F O R M A N C E The worldwide underground utility industry relys on Fisher. Our instruments are durable, dependable, and locate deeper. R E P U T A T I O N Fisher produced the first patented metal detector in For over 70 years, the Fisher logo has been a mark of excellence. 2 - YEAR LIMITED WARRANTY Fisher believes in the products we produce and backs this belief with a 2 year limited warranty. Proof of purchase is required to make a claim under this warranty. NOTE TO FOREIGN COUNTRY CUSTOMERS This warranty may vary in other countries, check with your distributor for details. Factory warranty follows the channel of distribution. Warranty does not cover shipping costs. S E R V I C E Fisher is committed to providing you, our valued customer, with superior service. Each and every instrument is rigidly tested and carefully inspected during assembly and before shipment. Should you have any questions or problems, contact: FISHER RESEARCH LABORATORY 1465-H Henry Brennan, El Paso, Texas Tel Fax info@fisherlab.com FRL#