It is not in English, but you can translate it from Czech if you have time by copying the whole text and putting it in http://translate.google.com/#
Translation might be funny in some parts though. Time needed to make CS is 7-12 hod, 20 ppm.
JAB
It's probably ok. It Sounds like it has an auto shut off and a current limiting circuit. Although I can't be sure because they talk in a mystical mumbo jumbo type way.
Have you ever checked the quality of CS by Tyndall effect?
JAB
I have. It just lets you know that their is something in the water. The small particles will not be seen. A proper conductivity meter works much better.