See link below, scroll down to "Tingle Current" section
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02807128&cc=us&dlc=en&lc=en#N119
See link below, scroll down to "Tingle Current" section
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02807128&cc=us&dlc=en&lc=en#N119