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Offline honykTopic starter
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« on: September 01, 2009, 11:18:42 am »
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Hello Everyone,

are there any recommendations how to perform amateur archaelogical survey with magnetometer in bushy forest? There are places with dense amount of young spruces (you have to slouch on all fours) or bushes hardly to penetrate. Is it necessary to keep sensor at the same height all the time? Must other components of instrument like PPM-MarkIII be in sufficient distances between each other to avoid errors in measurement? Can similar changes in configuration (standing person or crawling one nearby ground) cause significant deviations in final output? I have no magnetometer yet to be able to test it by myself, I am asking to get an idea if magnetometer is the right instrument in my case. Thanks in advance for your opinions.

Jan

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Offline olsteffe
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« Reply #1 on: September 01, 2009, 12:14:09 pm »
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Hello
Suggest you move the question to "Research and Techniques " that covers techniques, this post covers technology.


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Offline willy bayot
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« Reply #2 on: September 04, 2009, 08:26:42 am »
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Hi Jan,

If there is not much small magnetic garbage sitting on the ground or at shallow depth, the height of the sensor over ground is not too important.
All the modules of the PPM-MarkII are designed and built to contain a minimum of magnetic material. The only part which we could not remove is the skeleton of the LCD which is a small sheet of steel. Every other parts are either stainless or aluminum or plastic or brass. The battery is lead-based thus, non-magnetic.
It means that the electronic box (NEMA box) should be kept at at least one meter out of the sensor coils but no other precautions should be taken.

Willy

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Offline honykTopic starter
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« Reply #3 on: September 04, 2009, 10:55:29 am »
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Hello Willy,

thanks for the info, this is exactly what I was looking for  Great

Jan

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