Can this instrument be used for TH

[ivconic]

Ivconic
So this meter with just 3 pole conections can also work?

I thougth that you need 4 pole conections, one par has a reference and the other two for tacking surveys.

Anyway i think that the unit from Chine will perform good to, cause it has 100 memories to store data.

Regards


Nelson

Cheese! You are right!
I haven't payed attention that it has 3 poles only!

It is Kyoritsu Analog Earth Tester with 3 poles. It can be used too, alright, but than it will not allow conventional twin probe setup that i have suggested.
In this case sort of Wenner Array setup is possible.

http://www.ledaelectronics.com.au/ky...rth_tester.htm

[nelson]

Yes Ivconic, my EPE project uses Wenner Array setup. So i will try it next weekend after i replace my pic for the one you mention.
Will keep in touch.
Regards
Nelson

Cheese! You are right!
I haven't payed attention that it has 3 poles only!

It is Kyoritsu Analog Earth Tester with 3 poles. It can be used too, alright, but than it will not allow conventional twin probe setup that i have suggested.
In this case sort of Wenner Array setup is possible.

http://www.ledaelectronics.com.au/ky...rth_tester.htm

[Qiaozhi]

The book arrived yesterday.

It mainly discusses resistivity, magnetometry and magnetic susceptibility. But Chapter 5 also briefly talks about other methods, such as GPR, geochemical, acoustic reflection, metal detectors, thermal sensing, induced polarization, and (dare I even mention it) dowsing. The author tries to keep a open mind on the latter subject.

Over all it seems to have been a good purchase, and looks very interesting.

[satdaveuk]

I wonder if they will laugh one day when you dig out huge pot full with gold coins!! Ha!
"Who is laughing now!!!"
...
Even that simplified erm can be useful and do the very same job as top ones.
You have to learn how to set up the grid. You have to obey exact grid's rows and columns.
And finally you have to "logg" data ...i guess manually on paper.
Be patience and persistent. Always keep exactly the same distance between "working" probes.
Common setup for "our" kind of surveying is "Twin probe" setup.
I warmly suggest it to you. Put 2 "referent" probes away from grid, some 5-6 meters and leave those there. Move "working" probes through grid, cell by cell, row by row. Each sample (measurement) will need 3-4 seconds with probes in soil and than write down measured values. Remove to next row....etc..etc...etc.. Than next column. And next...etc..etc..
Let the step between measuring points in row be 0.5 meter. For a start.
So actually you will have grid with 0.5x0.5m cells.
Organize such grid on paper, print that paper, than use it on the field to write down your samples (measurements).
That's pretty skim explanation of how to properly work with erm.
Remember: "TWIN PROBE" setup is nice for a start. Later when you gain certain exepriences you can study other kinds of setups too.
That instrument you have there is quite alright although is analouge and simple.
Cheers!

Thanks Ivonics, when time permits will have another go, only orignally bid for it because it has a nice quality meter on it, thinking back to the Arado project which ive not started yet, but maybe this will stay intact for a while.
Something that i did notice while playing was as getting closer to my pond resistances were getting alot lower due to moisture in the soil so wouldnt that make it hit and miss far as seeing targets?
Many thanks

[ivconic]

Thanks Ivonics, when time permits will have another go, only orignally bid for it because it has a nice quality meter on it, thinking back to the Arado project which ive not started yet, but maybe this will stay intact for a while.
Something that i did notice while playing was as getting closer to my pond resistances were getting alot lower due to moisture in the soil so wouldnt that make it hit and miss far as seeing targets?
Many thanks

I am not sure what adjustments you have there on that instrument. On EPE resmeter i have additional adjustments for output resistance and input gain, so in case of increased moisture in soil i can compensate that by increasing output resistance. It is simply done by adding extra resistor in series with output. There are 10r, 100r, 1K and 10k to be choosed by rotary switch. So, i guess, you can do the same; by adding proper resistance in serie with output probe.

[ivconic]

The book arrived yesterday.

It mainly discusses resistivity, magnetometry and magnetic susceptibility. But Chapter 5 also briefly talks about other methods, such as GPR, geochemical, acoustic reflection, metal detectors, thermal sensing, induced polarization, and (dare I even mention it) dowsing. The author tries to keep a open mind on the latter subject.

Over all it seems to have been a good purchase, and looks very interesting.

That's the one!
If you never really had practical experiences with any of mentioned surveying methods; than plain reading of that book will give you only partial "picture" of real situation.
But once you obtain some of those instruments and go outdoor with it; you will find out how pricelles that book can be. It is indeed priceless for me because i was "wandered in the dark" for several years trying to adopt most proper surveying methods and techniques using resmeter and gradiometer. Every little detail sometimes can be precedent in whether or not you will achieve some results using such surveying methods. So, experiences explained in that book are priceless when learning and experimenting with such instruments.
For me; most benecitial working example was case of magnetic survey of a Saxon cemetery (Pewsey, Wiltshire), example wich is having lot of analogies with my recent surveys i done here at my place. Using such examples, studying them, i discovered many little details on which i was very wrong before i read that book.
Cheers!

[ivconic]

...
For me; most benecitial working example w....

BENEFICIAL not "benecitial" ! Damn keyboard!

[Qiaozhi]

That's the one!
If you never really had practical experiences with any of mentioned surveying methods; than plain reading of that book will give you only partial "picture" of real situation.
But once you obtain some of those instruments and go outdoor with it; you will find out how pricelles that book can be. It is indeed priceless for me because i was "wandered in the dark" for several years trying to adopt most proper surveying methods and techniques using resmeter and gradiometer. Every little detail sometimes can be precedent in whether or not you will achieve some results using such surveying methods. So, experiences explained in that book are priceless when learning and experimenting with such instruments.
For me; most benecitial working example was case of magnetic survey of a Saxon cemetery (Pewsey, Wiltshire), example wich is having lot of analogies with my recent surveys i done here at my place. Using such examples, studying them, i discovered many little details on which i was very wrong before i read that book.
Cheers!

It's not the sort of book you could honestly say was a "good read", as it's an academic text, and somewhat dry in its presentation. However, it does provide an excellent survey of the subject.

I've nearly finished reading the Resistivity chapter, where there's a good comparison between the different probe methods.

[ivconic]

I think i understand what are you saying.
But considering other related articles and few books i saw so far on this subject; this book gave me most basic infos i needed so far.
Yes, it looks "dry" in words, but when analyzing offered examples and comparing them with own practical experiences: man can adopt proper guidelines for further learning and work.
This may looks funny to professionals (i bet it does) but keep in mind that i am laic and complete novice on this field.
Making dozen easy homebrew projects - doesn't make me professional and expert in area at which such projects are aimed.
Still much things to learn! Huh!