Megger L1070 Manuel utilisateur
AVTM651070
Rev B
Nov 2006
Instruction Manual
L1070 and L1071
Portable Locator
Catalog No. 651070 and 651071
Read this entire manual before operating.
M
Valley Forge Corporate Center
2621 Van Buren Avenue
Norristown, PA 19403-2329
U.S.A.
610-676-8500
www.megger.com
L1070 and L1071
Portable Locator
Instruction Manual
Copyright© 2006by Megger. All rights reserved.
The information presented in this manual is believed to be adequate for the intended use of the product.
If the product or its individual instruments are used for purposes other than those specified herein,
confirmation of their validity and suitability must be obtained from Megger. Refer to the warranty
information below. Specifications are subject to change without notice.
WARRANTY
Products supplied by Megger are warranted against defects in material and workmanship for a period of
one year following shipment. Our liability is specifically limited to replacing or repairing, at our option,
defective equipment. Equipment returned to the factory for repair must be shipped prepaid and insured.
Contact your MEGGER representative for instructions and a return authorization (RA) number. Please
indicate all pertinent information, including problem symptoms. Also specify the serial number and the
catalog number of the unit. This warranty does not include batteries, lamps or other expendable items,
where the original manufacturer’s warranty shall apply. We make no other warranty. The warranty is
void in the event of abuse (failure to follow recommended operating procedures) or failure by the
customer to perform specific maintenance as indicated in this manual.
M
Valley Forge Corporate Center
2621 Van Buren Ave
Norristown, PA 19403-2329
610-676-8500 (Telephone)
610-676-8610 (Fax)
www.megger.com
AVTM651070 Rev B Nov 2006 i
Table of Contents
1............................................................................................................................................................. 1
Introduction....................................................................................................................................... 1
Receiving Instructions.................................................................................................................... 1
General Information ...................................................................................................................... 1
2............................................................................................................................................................. 3
Safety ................................................................................................................................................. 3
Precautions .................................................................................................................................... 3
3............................................................................................................................................................. 5
Specifications..................................................................................................................................... 5
Receiver......................................................................................................................................... 5
Transmitter.................................................................................................................................... 6
Battery Charger.............................................................................................................................. 7
4............................................................................................................................................................. 9
Transmitter Operation....................................................................................................................... 9
Controls and Indicators (Fig. 1)..................................................................................................... 9
Ac Resistance Indications............................................................................................................. 10
Transmitter Rechargeable Battery Option.................................................................................... 11
Selecting the Locating Method..................................................................................................... 12
Power Utility Connection............................................................................................................. 13
Telco Circuit Connection............................................................................................................. 14
Flexible Coupler Connection........................................................................................................ 15
Inductive Connection................................................................................................................... 16
Direct Connection........................................................................................................................ 17
Notes on Selecting the Tracing Signal.......................................................................................... 17
Continuously Grounded Circuit................................................................................................... 18
Telephone Direct Shield Connection............................................................................................ 19
Telephone Direct Pair Connection............................................................................................... 19
5........................................................................................................................................................... 21
Receiver Operation.......................................................................................................................... 21
Controls and Indicators................................................................................................................ 21
Locating Cable or Pipe................................................................................................................. 24
Peak Mode Locating..................................................................................................................... 24
Null Mode Locating..................................................................................................................... 25
Absolute Signal Strength.............................................................................................................. 26
Signal Strength Adjusted for Depth (Current Measurement)........................................................ 27
Gain Change Indication............................................................................................................... 28
Passive 50/60 Hz Locating........................................................................................................... 28
Push-Button Digital Depth.......................................................................................................... 28
Depth Measurement 45° Angle Method....................................................................................... 29
Offset Magnetic Field Identification............................................................................................. 30
AVTM651070 Rev B Nov 2006
ii
6........................................................................................................................................................... 31
Fault Locating with the L1070/L1071.............................................................................................. 31
Introduction................................................................................................................................. 31
Signal Return through an Insulated Fault...................................................................................... 31
Setting the Transmitter to Fault Mode.......................................................................................... 32
Setting the Receiver to Fault Mode............................................................................................... 32
Ground Return Probe .................................................................................................................. 32
Ground Return Probe Insertion................................................................................................... 33
Ground Return Probe Fault Locating........................................................................................... 33
7........................................................................................................................................................... 35
Service.............................................................................................................................................. 35
Maintenance................................................................................................................................. 35
Repair........................................................................................................................................... 35
AVTM651070 Rev B Nov 2006 iii
List of Figures
Figure 1: Transmitter Controls and Indicators.................................................................................... 9
Figure 2: Multiple Grounded Circuit Connection............................................................................. 13
Figure 3: Multiple Ground Power Utility Application....................................................................... 14
Figure 4: Multiple Ground Telco Application................................................................................... 14
Figure 5: Flexible Coupler Connection............................................................................................. 15
Figure 6: Inductive Connection........................................................................................................ 16
Figure 7: Inductive Connection 30°Angle........................................................................................ 16
Figure 8: Direct Connection............................................................................................................. 17
Figure 9: Continuously Grounded Circuit......................................................................................... 18
Figure 10: Telephone Direct Shield Connection............................................................................... 19
Figure 11: Telephone Direct Pair Connection.................................................................................. 20
Figure 12: Receiver Controls and Indicators..................................................................................... 21
Figure 13: Locating the Cable or Pipe............................................................................................... 24
Figure 14: Determine Cable Path in Peak Mode............................................................................... 24
Figure 15: Depth Measurements 45° Angle Method......................................................................... 29
Figure 16: Signal Return through an Insulation Fault to Earth.......................................................... 31
Figure 17: Collapsible Ground Return Probe................................................................................... 32
Figure 18: Ground Return Probe Insertion....................................................................................... 33
Figure 19: Spoked Wheel Return Paths............................................................................................ 33
Figure 20: Ground Return Probe Fault Locating.............................................................................. 34
AVTM651070 Rev B Nov 2006
iv
M
AVTM651070 Rev B Nov 2006 1
1
Introduction
Receiving Instructions
Check the equipment received against the packing list to ensure that all materials
are present. Notify Megger of any shortage. Telephone 610-676-8500 and ask for
the customer service department.
Examine the instrument for damage received in transit. If damage is discovered,
file a claim with the carrier at once. Prepare a detailed description of the damage
and notify Megger.
This instrument has been thoroughly tested and inspected to meet rigid
specifications before being shipped. It is ready for use when set up as indicated
in this manual.
General Information
Thanks for purchasing the Megger L1070 or L1071 Portable Locator. The
portable locator will help you locate and trace the routes of buried power cables,
cable television cables, gas and water pipes, sewer lines, telephone cables, and
fiber-optic cables. When used with the accessory ground return probes, the
portable locator will pinpoint faults on most direct buried secondary cables and
some direct buried primary cables.
The transmitter transmits a special signal on the cable under test. The receiver
receives the signal and indicates how strong it is. Microprocessors in both units
process the information and allow you to determine the path of the underground
cable.
Supplied Components
1. Receiver unit
2. Transmitter unit
3. Red/black test cord
4. Instruction Manual AVTM651070
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AVTM651070 Rev B Nov 2006
2
5. Eight 1.5 V D-size batteries (for L1070 non-rechargeable transmitter only)
6. Six 1.5 V C-size batteries
7. Ground rod
8. Ac battery charger (for L1071 rechargeable transmitter only)
9. Carrying case
Options
1. Ground return probe
2. Carrying case for the ground return probe
3. Flexible coupler
4. Dc battery charger (automotive)
Preparation for Use
Remove the receiver from the case. Locate the battery compartment. Install the
six 1.5-V C-size batteries as marked on the battery holder. Install the battery
cover and tighten the retaining screw.
Remove the transmitter from the case. Locate the battery compartment on the
bottom of the transmitter. Remove two screws from the battery compartment
door. Install the eight D-size batteries as marked on the battery holder. Install the
battery cover and tighten the two retaining screws.
Ce manuel convient aux modèles suivants
1
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