Hach ORBISPHERE A1100 User Manual

29Section 5 Maintenance and Troubleshooting5.1 Maintenance5.1.1 Maintenance scheduleThe following table shows the recommended schedule for membrane replacement. The tableshould only be used as a guideline, as maintenance intervals will vary depending on a numberof different parameters (e.g. water chemistry, CIP frequency, oxygen levels, sampletemperature, etc.).5.1.2 Prerequisites for sensor maintenanceThe following table lists the prerequisites for a sensor maintenance:Important Note: If the sensor is being used in a high level hydrogen sample, this cleaning andregeneration center is not required. In all other cases it is a prerequisite.The ORBISPHERE 32301 (illustrated below) is a very efficient cleaning and regeneration toolfor electrochemical sensors. This tool reverses the electrochemical process that is taking placein the sensor cell during normal operation. This removes oxidation and at the same timeregenerates the surface of the electrodes. In addition, the regeneration center offers a continuitytester for checking the sensor electronics.Table 5 Maintenance scheduleApplication Membrane type MembranereplacementWater applications (> 10ppb) 2956A Every 3 to 6 monthsPure water applications (power and electronics < 10 ppb) 2956A Every 3 to 6 monthsBeer in-line 2952A Every 3 to 6 monthsWort in-line 29552A or 2995A Every 1 or 2 monthsPortable or lab applications 2952A or 2958A Every 3 to 6 monthsTable 6 Prerequisites for sensor maintenancePart No. Description2959 Electrolyte for oxygen sensors, 50 ml. bottle.29781 Cathode polishing powder (part no.29331) and cloth (part no. 2934).32301 Electrochemical cleaning and regeneration center (see below)40089 Tweezers, for maintenance kitsDG33303 Cleaning tool for sensor polishingDG33619 Regeneration Cell for A1100 or C1100 sensorsDG33620 Orbisphere EC sensor support for cleaning