Hach ORBISPHERE A1100 User Manual

30Maintenance and Troubleshooting5.1.3 Membrane replacement and sensor head cleaningA sensor recharge kit is required as it contains all the required components necessary for thismembrane replacement and sensor head cleaning process (see details in Sensor recharge kiton page 14).CAUTIONAvoid all eye and skin contact with the electrolyte in the sensor and replacementcartridge as it is corrosive and can cause burning. If eyes or skin come into contact withelectrolyte, rinse immediately with water. In addition, the electrolyte can permanentlystain clothing so exercise care in handling. It is highly recommended to wear protectivegloves and glasses during this process.Note: It is advisable to perform this procedure with the plastic sensor base installed so as to avoid anydamage to the connection socket and also to provide a suitable stand for the sensor when required.1. Hold the main body of the sensor andunscrew the protection cap locking washerby turning counter-clockwise. Remove it fromthe sensor and put to one side.2. Pull/twist off the protection cap and put toone side. If you are using a protection capwith a grille, then remove the Dacron® meshfrom inside the cap and discard it.