How to make Jaggery syrup for Jaggery based sweets

Ingredients:
Jaggery (Pagu vareity) - 1 cup
Water - 1 cup

Method:
In a deep pan add 1 cup of water and jaggery and keep stirring till sugar dissolves completely. Bring it to a boil. When it boils remove from flame and strain to remove all the impurities. Boil again till either one string or two string consistency is reached.

How to check one string or two consistency?
   When the jaggery syrup is dropped from a height, it have to flow freely like a string and should not fall down as a lump.

   Two strings should fall down for two string consistency.

For making groundnut balls or broken gram balls or Karthigai Pori Urundai or Kaaparisi the following consistency have to be reached:
   The syrup should be the consistency of a ball. It should make a sound when dropped into a plate, or when dropped into a cup of water, it should not stick to the bottom.

If candy thermometer is used, the measurement should read around 240 to 250 deg F.