Dr Jurgen Schleicher has written a number of excellent basic tutorials for Jumo Controls. I am very pleased to be able to post them on controlglobal.com! Here are the URLs and a short description of each one:
The Basics of pH and pH control:
http://www.controlglobal.com/whitepapers/2008/204.html
Conductivity basics:
http://www.controlglobal.com/whitepapers/2008/205.html
High Purity Water:
http://www.controlglobal.com/whitepapers/2008/206.html
Redox or ORP basics:
http://www.controlglobal.com/whitepapers/2008/207.html
Amperometric Methods for Determining Free Chlorine, Chlorine Dioxide and Ozone residuals
http://www.controlglobal.com/whitepapers/2008/208.html
Measurement of Hydrogen Peroxide and Peracetic Acid:
http://www.controlglobal.com/whitepapers/2008/209.html
Measurement of Ammonia in Water
http://www.controlglobal.com/whitepapers/2008/210.html