Hello everyone,
1: I want an excellent grounding / earthening for my weighing scale so that it can surely shows 0 ohms resistance in it.
2: The scale is kept on a wooden table at first floor of the house.
3: I have been told by my Father that about 22 years ago when the house was built, a seven strands copper cable (about 0.25 inch thick) was burried under soil upto 30-35 feet deep after making a bore in the soil along with some earthening compounds. Salts or so.
4: No futher earthening connections were made afterwards till today.
5: I have found the cable outlet from the burried point in my lawn.
6: Now i want to connect directly it to the equipment that is about 50 feet away from the burried point on the 1st floor of the house.

What you expertise suggest:
+ Will this work for me & bring 0 ohms ressistance in the scale frame?
+ What should be the specifications of copper cable to connect both sides? (Burried Point to Scale).
+ Will it be enough to catch 0 ohms resistance or if i will need to connect Green Wire from Scale's power supply cable to connect it to same copper cable. (Only Black & White wires are connected to wall socket right now).
+ How would i know that the Scale i have just grounded is Truly grouned. I have never used ohm meter but have recently purchased analog ohms meter. Meter selects only two options that are 1MΩ & 100KΩ only.
Scale needs to be of 0 ohms resistance to be in proper working. While pressing Tare button it should go into a net mode & display should show 0000 grams but it dispalys 0002-0010 grams for being not in 0 ohm resistance.
Do you think it could be a problem because of voltage peaks & valleys rather than 0 ohm resistance?
Please help.

If the scales require an earth use a cable the same size as the flex supplying the scales.
To operate electronic scales correctly it is neccessary to set the zero (after a few minutes warm up) before weighing anything with nothing on the scales.
There should be a "set zero" button.

the Tare weight is that of the container used to contain what you are weighing.
The Tare button allows you to set the scales back to zero with the container on the scales.
Thus the weight of anything you place in the container will be indicated directly on the scales.

You appear to be confusing grams with electrical resistance.
They are not the same.

How is a weighing scales accuracy or say calibration dependant on an earth reference from outside???????????

Black and white wires are mentioned. What country is this scale in?

It should have a reset button to zero the reading when empty to enable cleaning, change of container etc.

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Lack of planning on your part doesn't make it an emergency on mine....

Every man has to know his limitations- Dirty Harry