Quote:
Originally Posted by Goldmaxx
And here is my status quo.
The TX coil is mounted, connected and it works well.
Thereby my TOTeM PD is completely, except for the calibration of the coils.
I have tried to calibrate the coils in the house, but has not brought satisfactory results.
At the spark test, I could locate the spark only on a distance of about 1.5 m.
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The spark test is only an indication of the sensitivity to external EMI. Since your main purpose is not detecting sparks, the actual distance is not important.
Quote:
Originally Posted by Goldmaxx
Qiaozhi
In this setting I can detect a gold or silver ring in about 8 - 10 cm from the Tx coil.
Is this value okay, or must even be more?
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I would consider this to be very good. If you watch some of the Mineoro videos, you will note that their pinpointing detection range (in air) is not as good. In Chapter 13, page 213, Carl shows a photo of his Mineoro FG80, and states that "FG" stands for "Fresh Gold", even though the device is incapable of detecting the test sample that comes with the unit.
Have you also noticed, when testing TOTeM, how the ring is only detected at the front-end of the ferrite, but there is no response from behind the unit?
In fact, you have a better sensitivity in the air test than my prototype. I switched on my TOTeM today and found that the meter was "zeroed" three-quarters of the way across the scale, so I probably need to recalibrate it.