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Table of Contents
1 Introduction
..........................………………………………………….. 4
2 480B Equipment
................................... …………………….…………..5
2.1 Standard Equipment ............................... ………………………….…5
2.2 Optional Equipment .............................………………….…………. .6
2.3 Specifications ................................... ………………………………...7
2.4 Controls and Indicators of the Model 480B Transmitter .................... 8
2.5 Controls and Indicators of the Model 480B Receiver ........................ 9
3 Checkout Procedure
...................................…………………………….10
4 Operation
............................................…………………………………..11
4.1 Direct (Conductive) Connection ..................…………………………12
4.2 Inductive Coupling with the 4820 Metroclamp .....…………………..14
4.3 Inductive (Indirect Method) ....................…………………………….15
4.4 480BB 50/60Hz Power Line Locating………………………………..15
4.5 Estimating the Depth of a Conductor ........……………………….......16
4.6 Using the 4810 Probe for Pinpointing
and Depth Estimation ...........................………………………………..17
4.7 Using the Carrying Handle for Blind Searching,
Ground Surveys, and Metal Mass Location .....……………………......18
4.8 Conductor Identification
Using a Second 4820 Metroclamp ................…………………………..20
4.9 Marking the Conductor .........................……………………………....21
5 Tracing Factors and Helpful Information
...........……………………...22
5.1 Soil Conditions .................................………………………………….22
5.2 Field Strength of the Signal ............……………………………..........22
5.3 Verifying Versus Tracing……………………………………………...22
5.4 Adjacent Conductors .............………………………………................22
5.5 Deep Conductors .....................………………………………..............22
5.6 Tracing Long Runs ....................………………………………............23
5.7 Locating a Service Lateral ....................………………………………..23
5.8 Locating a Bend or Dead End ...............…………………………….....24
5.9 Valves, Manhole Covers, Tees, and Risers .……………………….......24
5.10 Common Bonded Conductors ...................……………………….......24
5.11 Congested Areas ..............................……………………………….....24
5.12 Pipes with Insulated Junctions ..............……………………………....24
5.13 Metroclamp Ground Requirements .........……………………….........25
5.14 Grounding Safety ..............................…….…………………………...25
5.15 Distribution Systems .......................………………………………......25
6 Maintenance
........................................…………………………………....25
6.1 Checking and Replacing the 480B Transmitter
and Receiver Batteries .......................…………...……………………....25
6.2 Basic Preventive Maintenance ...........…………………………….........26
Copyright ............................................………………………………………...27
Disclaimer……………………………………………………………………...27
Warranty ............................................………………………………………....27
