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Metrotech 810 Line Tracer, Руководство по эксплуатации

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4.5  Determining the Depth of a Conductor 

 
To determine the depth of a conductor accurately, the 810 field strength must be greater than 500.  Keep in mind 
that depth measurements are affected by soil condition, overhead lines, and adjacent conductors.  In congested 
areas it is preferable to use Direct Connect when determining depth. 
 
1 

First determine the location of the conductor using any of the methods described above (Direct 
Connection, Inductive Coupling, or Inductive Method). 

 
2 

Make sure the Receiver antenna is fully extended, otherwise, the depth reading will be incorrect. 

 
3 

Facing in the direction of the conductor, touch the antenna tip to the ground directly above the 
conductor, with the Receiver at right angles to the ground.  (See Figure 4-7). 

 
4 

Press and release the DEPTH BUTTON on the handle of the Receiver.  Within seconds, the digital 
display will show the depth of the conductor in inches or centimeters, depending on the instrument 
version. 

 
 
 
 
 
 

 

 
 

 

Figure 4-7:  Determining the Depth of a Conductor

 

 
 
 
 
 
 
 

Содержание 810 Line Tracer

Страница 1: ... Santa Clara CA 95054 Nashville TN 37211 Dr Herbert Iann St 6 800 446 3392 800 624 6210 96148 Baunach Germany 408 734 1400 Direct 615 366 7323 Direct 49 9 544 680 408 734 1415 Fax 615 360 9855 Fax 49 9 544 2273 Fax www metrotech com nashville metrotech com service sebakmt com sales metrotech com Warranty One year Specifications Subject to change without notice ISO 9001 2000 Certified Copyright 200...

Страница 2: ...standard guidelines of ISO 9001 and ensures quality in its design development production installation and servicing disciplines Metrotech Corporation 2008 Metrotech Corporation 3251 Olcott Street Santa Clara CA 95054 USA Tel 1 800 446 3392 1 408 734 1400 Fax 1 408 734 1415 E mail sales metrotech com Internet www metrotech com ...

Страница 3: ...edure 22 5 1 Applications 22 5 2 Locating Conductors 22 5 3 Subdividing Large Search Areas 22 6 Tracing Techniques and Helpful Information 23 6 1 Soil Conditions 23 6 2 Adjacent Conductors 23 6 3 Metroclamp Ground Requirements 23 6 4 Grounding Safety 23 6 5 Distribution Systems 23 6 6 Deep Conductor 23 6 7 What is the field Strength of the Signal 23 6 8 Ghost Conductor Due to Adjacent Conductor 23...

Страница 4: ...e Metroclamp 14 4 1 Direct Connection 15 4 2 Inductive Coupling with the Metroclamp 16 4 3 Signal Field Generated by Transmitter When in Inductive Use 17 4 4 Position of Transmitter for Inductor Use 17 4 5 Position of Receiver 18 4 6 810 Receiver Guidance System 18 4 7 Determining the Depth of a Conductor 20 4 8 Position of Metroclamps When Using Two 21 5 1 Locating Conductors Parallel Pattern 22 ...

Страница 5: ...e or cable conductor The signal travels along the conductor becoming weaker as it gets farther away from the Transmitter The distance that the signal travels before it becomes too weak to be detected depends on the method of connection the type of conductor surrounding soil and depth of the conductor When positioned over the conductor the Receiver will detect the signal from the conductor The Rece...

Страница 6: ...6 Figure 2 1 810 Line Tracer Standard and Optional Equipment ...

Страница 7: ...ures of the Model 810 Transmitter and Receiver are discussed in detail in sections 2 4 and 2 5 2 2 Optional Equipment Part Number Description Remarks 4820 4 Metroclamps Optimally tuned to the 810 4890 8 Metroclamps Compatible with other 4490 4 Metroclamps Metrotech locators 4290 2 Metroclamps jumper cable included with all clamps 183045 Headphones For use when locate site is too noisy for audio to...

Страница 8: ... 3 25 W x 6 5 H 20 3 x 10 5 x 17 2 cm 810 Receiver Trace Accuracy 1 inch from 0 to3 ft 91 3 over 3 ft 91cm in depth Depth Readout Accuracy 10 under normal conditions Depth Readout Range To 13 ft 400 cm Sensitivity Control Automatic no adjustments Necessary Battery Type 4NEDA 1604A Alkaline 9V IEC 6LR61 Int l Std or JIS 6AM6 Jpn Std Battery Life 145 hrs average Battery Check Turn Mode Switch to Bat...

Страница 9: ...4820 CLAMP Output Jack Connection point for the Direct Connect cable Or any Metroclamp 3 CONDUCTOR DIRECTION Arrow Orients the Transmitter when used in Inductive Mode 4 POWER TEST Lamp If there is adequate battery power for operation this lamp will light up when you push the POWER TEST button 5 POWER TEST Button Push this button to determine if there is adequate battery available for operation ...

Страница 10: ...move the Receiver to the left BATTERY STATUS When the MODE SWITCH is turned to the Battery Test position the meter needle should move to the right of the battery test arrow 2 DIGITAL SIGNAL STRENGTH The signal strength is indicated on the LCD display when the MODE SWITCH is in the line tracing mode third position or field strength only mode fourth position 3 DEPTH PUSH BUTTON In order to get a dep...

Страница 11: ...ontinues to be operational 5 HEADPHONE JACK For use in noisy environments 6 SPEAKER The speaker in the Receiver emits a tone which corresponds to the position of the needle on the Left Right Guidance meter A continuous tone solid arrow indicates the conductor is to the right A broken tone broken arrow indicates the conductor is to the left Back of Receiver 7 BATTERY ACCESS Thumbscrew Turn the thum...

Страница 12: ...Receiver batteries should be replaced 5 Move the Receiver MODE SWITCH to the AUX position fourth position 6 Position the Receiver as shown in Figure 3 1 The digital signal strength indicator should display 950 or above Note the field strength figure you will be using it for comparison in the next steps of the procedure 7 With the Receiver MODE SWITCH in the line tracing mode third position move th...

Страница 13: ...e conductive wires 15 Turn the MODE SWITCH on the Receiver to the fourth position field strength only The field strength should be the same or very close to the reading in test procedures 5 and 6 above The reading should be constant and not fluctuate 16 While watching the field strength readout wiggle each connection point on the Conductive Attachment at the DIRECT 4820 CLAMP jack and at the clamp...

Страница 14: ...ductive Attachment still in the loop configuration and lay it on the floor or ground 21 Turn the Transmitter back ON 22 Note the field strength shown o the Receiver it should be close to that of step 15 above 23 While watching the field strength readout gently wiggle the wires at each of the connection points Any fluctuation in the field strength readout indicates a loose or broken wire within the...

Страница 15: ...ctions follow below 4 1 Transmitter Direct Connection This is the preferred mode of operation because the Transmitter is connected directly to a metallic part of the conductor hydrant meter riser valve sheath tracer wire allowing a strong maximum signal to reach the conductor In this operating mode the Receiver can be closer to the Transmitter Adjacent buried conductor interference is reduced 1 Wi...

Страница 16: ...signal through the clamp When using the Metroclamp the conductor must be well grounded at both ends When tracing lines that have insulators the insulators should be bypassed using the supplied jumper cables Bonding and grounding at termination id often standard practice in industries that use cable but do not assume this to be the case 1 With the Transmitter OFF plug the Metroclamp able into the D...

Страница 17: ...ter housing and couples to the conductor by electromagnetic induction 1 Position the Transmitter over the target conductor at a place that is at least 30ft away from where you will be searching with the Receiver If the Transmitter is very close to the Receiver more signals may reach the Receiver by air coupling than by coupling through the conductor Align the CONDUCTOR DIRECTION arrow with the con...

Страница 18: ...18 Figure 4 5 Position of Receiver for Tracing Figure 4 6 810 Receiver Guidance System ...

Страница 19: ... meter needle will move toward the center the signal will peak and the tone will be silent See Figure 4 6 5 To determine the direction of the conductor touch the Receiver tip to the ground over the conductor and rotate it on its vertical axis The highest signal strength reading indicates the direction of the conductor Continue to trace the conductor in the direction indicated by the Receiver If th...

Страница 20: ...methods described above Direct Connection Inductive Coupling or Inductive Method 2 Make sure the Receiver antenna is fully extended otherwise the depth reading will be incorrect 3 Facing in the direction of the conductor touch the antenna tip to the ground directly above the conductor with the Receiver at right angles to the ground See Figure 4 7 4 Press and release the DEPTH BUTTON on the handle ...

Страница 21: ...mp around each conductor in succession making sure that the jaws are fully closed The conductor with the highest field strength reading is the target conductor Figure 4 7 Note The method will work only if there is no cross bonding on the length of the conductor between the conductor and the Receiver 4 7 Marking the Conductor The following color markings have been established b the American Public ...

Страница 22: ...arrying the Transmitter the other operating the Receiver move in parallel across and then down the survey area The operator with the Receiver must move sideways facing the second operator with the Transmitter The Transmitter operator faces the direction in which he is moving as shown in Figure 5 1 The LCD reading on the Receiver will indicate the presence o a conductor under the ground as the oper...

Страница 23: ... gas services on a gas distribution system you must be sure that the service is grounded This can be accomplished by temporarily connecting a jumper cable to a ground spike at the end of a service where the pipe comes out of the earth 6 6 Deep Conductor Signals picked up by the Receiver from deep buried cables are weaker and not as directional distinct as those from cables closer to the surface Th...

Страница 24: ...med to be grounded If the conductor is a pipe which has an insulated joint such as a gas pipe with a meter use the jumper cable refer to Figure 4 2 Attach each end of the jumper cable on opposite sides of the insulator See Figure 6 1 6 10 Common Bonded Conductors Telephone power and CATV sometimes use a common ground bond If other conductors are connected to your target conductor putting a signal ...

Страница 25: ... After you have traced the main you may want to go back and locate the service laterals off the main Service lateral traces are easiest to conduct in the Inductive Mode Two operators are required for this procedure Operator 1 remains stationary holding the Receiver as id to trace Figure 4 5 over and parallel to the main Operator 2 carrying the Transmitter with the power on and maintaining a minimu...

Страница 26: ...he batteries 4 If the needle if to the left of the BATT STATUS line the batteries need replacing Turn the BATTERY ACCESS thumbscrew on the back of the Receiver Replace all four ells making sure that the batteries are installed with the positive end to the positive terminals 5 Close the battery access panel ensuring that there are no wires caught between the Receiver body and the access panel Make ...

Страница 27: ...les metrotech com Internet www metrotech com Metrotech Eastern United States Service Center 5211 Linbar Drive Suite 503 Nashville TN 37211 Toll Free 800 624 6210 Direct 615 366 7323 Fax 615 360 9855 Email nashville metrotech com Web www metrotech com techsupport asp Metrotech European Service Center Seba Dynatronic GmbH Dr Herbert Iann Str 6 96148 Baunach Germany Tel 49 9544 680 Fax 49 9544 2273 E...

Страница 28: ...D HEREIN Metrotech warrants its equipment to be free from defects in workmanship and material under normal and proper use and service for one year from date of purchase by original user Metrotech assumes no obligation to repair or replace equipment which has been altered or repaired by other than a Metrotech approved procedure been subject to misuse misapplication improper maintenance negligence o...

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