Megger Easyloc Basic, Руководство по эксплуатации

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4.2.3 General site surveying
Requirement A general site probing urgently needs to be conducted and there is inaccurate or no
information available as to the location and orientation of metallic conductors on a site
planned for construction (e.g. excavation work).
Basics of site surveying When a site is to be searched for unknown conductors, a systematic approach should
be taken. The following picture illustrates how to proceed:
Carry out a passive survey in POWER GRID and RADIO modes using a grid search
pattern to cover the site and locate conductors in all directions.
If the site will be surveyed with the aid of the
Easyloc Tx transmitter used on induction,
the position of the transmitter should be changed by at least one metre and 90° after
the first sweep of the site and the site should be probed again in the same manner.
The minimum spacing of 15 m between the transmitter and receiver must always be
maintained.
How to proceed Follow the steps below when probing a site for unknown metallic conductors:
Step Action
1 If the site will be searched with the aid of the Easyloc Tx transmitter, the
transmitter needs to be configured as described in section 4.1.3 Initial use
of the transmitter before proceeding.
2
Press
to switch on the receiver.
3
Select the desired mode of operation (see section 4.2.2.1 Modes of
operation for the receiver ) by pressing the button.
The symbol for the currently selected mode of operation is shown in the
lower right-hand corner of the display.
4 Pace off the site as previously described and make a grid search of the
site.
Adjust the sensitivity of the receiver as needed if the signal level is too
strong / weak (see section 4.2.2.2 Regulating the sensitivity level to match
the reception signal strength ).
5 When a conductor is located, pinpoint the strongest signal (see section
4.2.2.3 Handling the receiver ) and mark the location.
3
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