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Vivax Metrotech VM-810, Руководство пользователя

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Vivax Metrotech VM-810 Скачать руководство пользователя страница 18

5     Operation

Operation

Follow the checkout procedure described in Section 3 before operating the equipment.

To operate the VM-810/VM-850 Line Tracer, use the VM-810/VM-850 transmitter to 

apply a signal to the conductor, and use the VM-810/VM-850 Receiver to trace the 

signal.

DANGER – ELECTRICAL SHOCK

When making a direct connection to a live power cable, always 

be sure the power to the cable is turned OFF by using a 

voltmeter to check for active electrical power. (Live secondary 

power can be located safely using an Inductive clamp.)

WARNING – ELECTRICAL SHOCK

The VM-810/VM-850 transmitter generates up to 65 volts RMS. 

To avoid electrical shock, handle the conductive leads one at a 

time when the transmitter is ON.

CAUTION – INACCURATE INFORMATION

Do not operate the transmitter while it is resting on or near a 

metal surface or large metal object. Incorrect test readings and 

damage to the transmitter may result.

There are three different methods of applying the signal to the conductor with one of 

the transmitters – Direct Connection, Inductive Coupling and Inductive. A description of 

each method and use instructions follow below:

5.1     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.

NOTE

It is possible to set the output power to low or high settings. 

Always try to locate the target in the low setting first. This will 

ensure that there is minimal bleed over to other services and 

will prolong the life of the battery. If the signal is too weak or 

unstable, set the transmitter to high power and try again.

1.  With the transmitter OFF, plug the direct connect lead into the direct connection 

socket of the VM-810/VM-850 transmitter.

Page 15 of 35

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Содержание VM-810

Страница 1: ...VM 810 VM 850 Pipe and Cable Locator User Handbook English Edition Version 1 7 P N 4 04 000027 ...

Страница 2: ...est to You 6 Introduction 7 3 1 VM 810 VM 850 7 3 2 VM 810 VM 850 Receiver Controls and Indicators 9 3 3 VM 810 VM 850 Transmitter Controls and Indicators 10 Check Out Procedure 12 4 1 Introduction 12 Operation 15 5 1 Transmitter Direct Connection 15 5 2 Transmitter Inductive Coupling 16 5 3 Transmitter Inductive Method 17 5 4 Using the Receiver 18 5 5 Determining the Depth and Signal Current appl...

Страница 3: ... the Circuit Path 29 7 10 Common Bonded Conductors 30 7 11 Congested Areas 30 7 12 Locating a Service Lateral 31 7 13 Valves Manhole Covers Tees and Risers 31 Maintenance 32 8 1 VM 810 VM 850 Receiver Calibration 32 8 2 Replacing the VM 810 VM 850 Receiver Batteries 32 8 3 Replacing the VM 810 Transmitter Batteries 32 8 4 Recharging the VM 850 Transmitter Batteries 33 Glossary 34 ...

Страница 4: ...ransmitter is switched on 1 4 Batteries and Environmental Safety Vivax Metrotech products use four types of batteries Alkaline batteries Ni MH Nickel Metal Hydride batteries rechargeable Lithium ion batteries rechargeable Lithium metal batteries small non rechargeable button cells for clock applications 1 4 1 Alkaline Batteries Non Rechargeable When replacing the alkaline batteries use only the si...

Страница 5: ...ry life and in extreme circumstances cause damage to the locator and fire 1 4 3 Lithium Ion Batteries Rechargeable Lithium ion Batteries some products use Lithium ion batteries the requirements for marking and transportation are still developing Please contact Vivax Metrotech before shipping products containing Lithium ion batteries or Lithium ion battery packs on their own for any special instruc...

Страница 6: ...se If left for prolonged period of time remove alkaline batteries Keep unit clean and free of dust and dirt Protect against excessive heat 1 6 Care When Interpreting the Information Provided by the Locator Like all locators this instrument is locating and providing depth and current readings based on electromagnetic signals that radiate from the buried cable or pipe In most cases these signals wil...

Страница 7: ...r 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 guarante...

Страница 8: ...del number serial number and software revision number when requesting product support They can be found as follows for reference only 1 Model Serial Number NOTE The transmitter Model Serial Number can be found at the front of the transmitter Software Revision Number is displayed on the LCD during the start up Page 5 of 35 1 1 ...

Страница 9: ...ianSales vxmt com Central SouthAmerica and the Caribbean Ventas para América Latina 3251 Olcott Street Santa Clara CA 95054 USA Website www vivax metrotech com T Free 800 624 6210 Tel 1 408 454 7159 Fax 1 408 743 5597 Email VentasparaAméricaLatina vxmt com ALLFIND Ltd No 780 Tianshan Rd Shanghai China 200051 T Free 4006 288 062 Tel 86 21 5101 2862 Fax 86 21 5235 8365 Website www allfind com cn Ema...

Страница 10: ...ductor 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 Receiver s Left Right Guidance System field strength disp...

Страница 11: ... extreme temperature conditions i e below 0ºC and above 45ºC Although Vivax Metrotech batteries include all the required safety related features always immediately discontinue use of the charger and battery pack if the battery pack becomes excessively warm Return both to where they were purchased for investigation Always ensure batteries have at least a partial charge if storing for long periods w...

Страница 12: ...rection Indicator 90 line Sonde direction indication 3 Digital Signal Strength Indicator The signal strength is indicated on the LCD display 4 Automatic Backlight Sensor Automatically senses when background light is low and switches on LCD backlight 5 Battery Status Continuous battery level indicator 6 On Off Plus Push Button Depth Current Sonde Press to switch on long press to switch off A short ...

Страница 13: ...nput Auxiliary input such as Signal Clamp 5 Rubber Cover Headphone Impedance 8ohms Power rating 1 watt 3 3 VM 810 VM 850 Transmitter Controls and Indicators 1 Rubber Weather Seal Cover 2 Direct Connection and Accessory Socket 3 Output Fuse 4 6 x D Type Cells Page 10 of 35 1 2 3 4 5 3 4 1 2 ...

Страница 14: ...t Power Indicator 4 Output Power Select 5 High Output Power Indicator 6 On Off 7 Speaker Volume Select NOTE The battery indicator will flash when the battery level nears a fully discharged state At this time if not already set the output will automatically switch to low output to conserve the remaining battery charge Page 11 of 35 7 1 2 3 4 5 6 ...

Страница 15: ...he receiver on by pressing the ON OFF button Check that there is at least 25 battery life 5 Position the receiver as shown in below The digital signal strength indicator should display 950 or above Position of the Receiver for Checkout Procedure Step 6 6 Now move the receiver back from the transmitter 3 6ft 1 2m Point the receiver at the transmitter as shown above the Left Right Guidance needle wi...

Страница 16: ...the DEPTH button A depth reading should appear 11 Turn the Transmitter OFF by press and hold the ON OFF button To test the conductive attachment for loose or broken wires 1 Connect the BLACK and RED ends of the conductive attachment together Lay the connected wires out on the floor in a circular configuration as shown below Plug the conductive attachment into the direction connection socket of the...

Страница 17: ... watching the signal strength readout wiggle each connection point on the conductive attachment at the direct connection socket and at the clamp end of each of the conductive attachment wires red and black The signal strength should not change Any fluctuation in the reading indicates a loose or broken wire within the conductive attachment 6 Repeat step 6 on the other conductive wire 7 Turn the tra...

Страница 18: ...the transmitter may result There are three different methods of applying the signal to the conductor with one of the transmitters Direct Connection Inductive Coupling and Inductive A description of each method and use instructions follow below 5 1 Transmitter Direct Connection This is the preferred mode of operation because the transmitter is connected directly to a metallic part of the conductor ...

Страница 19: ... to trace The Inductive Coupling method uses a signal clamp to induce a signal onto the conductor when direct metallic contact is not possible The clamp is placed around the target conductor The Transmitter then induces a signal through the clamp For best results when using the signal clamp the conductor should be well grounded at both ends When tracing lines that have insulators it is best but no...

Страница 20: ...n be picked up by other conductors in the area In this mode the signal radiates from an antenna inside the bottom of the transmitter 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 signa...

Страница 21: ... transmitter Position of Transmitter for Inductive Use 5 4 Using the Receiver The following describes using the Receiver with any of the three methods of applying Transmitter signal Position of Receiver for Tracing 1 Loosen the nut on the Receiver stem assembly and extend the stem as far as possible Tighten the nut to secure the stem 2 Turn the Receiver ON Page 18 of 35 ...

Страница 22: ...al display LCD will rise as you approach the conductor As you close in on the location of the conductor the meter needle will move toward the center the signal will peak and the tone will be silent See graphic below VM 810 VM 850 Receiver Guidance System 6 To determine the direction of the conductor touch the Receiver tip to the ground over the conductor and rotate it on its vertical axis Stop whe...

Страница 23: ...meter reading Keep in mind that depth and current measurements are affected by overhead lines adjacent conductors and abrupt changes in direction or depth 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 Re...

Страница 24: ...epends on the quality of the radiated signal being located If the signal is not distorted the depth reading will be accurate to within 5 of the actual depth If the signal is distorted depth readings will be less accurate When taking depth measurement always hold the receiver in line with the line and at 90 to the ground Position of Signal Clamps when Using Two Page 21 of 35 Depth Current 1 9 2 74m...

Страница 25: ...he method will work only if there is no cross bonding on the length of the conductor between the conductor and the Receiver The Receiver signal clamp is a useful tool to help identify cables However it should not be used as positive identification before an unused cable is cut Always follow company procedures when cutting disused or isolated cables 5 7 Marking the Conductor The following color mar...

Страница 26: ...oblems arise during a locate 1 Switch on the receiver Double click the on off button to activate Sonde mode Check battery status 2 Switch on Sonde and place on ground away from metal objects such as rebar 3 Position Receiver within one foot or so of the Sonde and check high signal strength reading on Receiver Receiver displays higher signal strength when over the Sonde 5 8 2 Operation in Sonde Mod...

Страница 27: ...10 feet along the length of the pipe and relocate Sonde as above Repeat until Sonde is located in desired position 5 Determining the depth of the Sonde Keep in mind that depth measurement is affected by soil conditions overhead lines adjacent conductors such as rebar etc which distort the field produced by the Sonde Position yourself directly over the Sonde make sure the tip of the receiver is par...

Страница 28: ...th Measurement is the same as in line location but must be done in the Sonde mode Depth measurements taken from a Sonde in any mode other than Sonde mode will be inaccurate 5 8 4 Using the Sonde Direction Feature to Locate Sondes Switch on the 810 850 by pressing the ON OFF button Then press the button twice quickly to activate the Sonde mode Stand in the approximate vicinity of the Sonde If the s...

Страница 29: ...that restricts walking in an arc the following method can be used Position the locator in the approximate vicinity of the Sonde as above Rotate the locator so that the direction indicator is now pointing at 3 o clock Now step to the side keeping the locator pointing in the same direction The direction indicator will rotate slightly Keeps the locator pointing in the same direction and walk forward ...

Страница 30: ...ver 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 the picture below The LCD reading on the Receiver will indicate the presence of a conductor under the ground as the operator passes over it Mark the location of each...

Страница 31: ...round a cable both ends of the target conductor must be grounded to insure sufficient field strength Power lines and telephone sheaths are assumed to be grounded If the conductor is a pipe which had an insulated joint such as a gas pipe with a meter use the jumper cable Attach each end of the jumper cable on opposite sides of the insulator 7 4 Grounding Safety If you use the Direct Connect method ...

Страница 32: ...uctors A ghost trace can be detected by noting the following 1 When the Left Right Guidance needle changes direction and the tone changes from broken to solid or solid to broken and the Left Right Guidance meter needle moves in the same direction as you are moving Normally the Left Right Guidance needle moves in the opposite direction 2 The field strength reading will drop as you move toward the g...

Страница 33: ...gested Areas In an urban or otherwise congested locate area it is not uncommon for water gas power or telephone utilities to use common trenching Every congested situation is different there are too many variables for us to cover here Use good judgment and locating skills to carefully determine where other conductors are in your locate area and what effect they may be having on your tracing situat...

Страница 34: ...he power on and maintaining a minimum of 100 ft between himself and the Receiver walks parallel but 5 feet from the main on the side he expects to find the service laterals as shown in below The field strength reading on the Receiver will increase as Operator 2 crosses over the service lateral with the Transmitter Each time the field strength reading increases Operator 1 signals Operator 2 and he ...

Страница 35: ... Service Center 8 2 Replacing the VM 810 VM 850 Receiver Batteries 1 Have ready two D cell 1 5V NEDA 13A IEC LR20 Int l Std or JIS AM1 Jpn Std type alkaline batteries 2 Unscrew the retaining screw on the rear of the receiver 3 Pull away the battery compartment from the receiver 4 Unclip the two retaining lugs at the top of the battery holder allowing the lid to hinge back 5 Remove the two spent ba...

Страница 36: ...crew Hand tightens only 8 4 Recharging the VM 850 Transmitter Batteries Check the VM 810 VM 850 Transmitter batteries by pressing the POWER ON button The BATTERY indicator lights will indicate if the batteries are charged If you need to charge the batteries follow the steps below 1 Connect the charger to the transmitter as shown below Connect the charger to a main 110 or 240V AC socket 2 Switch on...

Страница 37: ...ransferring to lines to which they were not originally applied Coupling can be direct where the target line has an electrical connection to another line or induced where the signal radiates from the target line to another line or lines Display The information visually available on the dot matrix display Line A generic term for any buried pipe or cable Null A minimum response to a buried line Passi...

Страница 38: ...powered transmitter A receiver tuned to the same frequency can locate the position of the Sonde and hence whatever it is attached to or in Frequently used for locating sewer cameras and the non metallic pipes Target Line The buried pipe or cable to be located Trace Using a locator to following the path of a buried line Illustrations used in the preparation of this manual will inevitably show some ...

Страница 39: ...___________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ __________________...

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