This document is a warranty instruction manual for BL 983317-0 and BL 983317-1 panel-mounted EC indicators and controllers. The products feature a measurement range of 0.00 to 10.00 mS/cm, a resolution of 0.01 mS/cm, an accuracy of ±2% f.s., automatic temperature compensation from 5 to 50°C, manual calibration, and a dosing contact with a maximum of 2A.