Hach ORBISPHERE K-M1100 Basic User Manual

Also see for ORBISPHERE 410: Basic user manual Quick operator's guide User manual User manual Basic user manual

Section 12 Maintenance12.1 Instrument maintenanceC A U T I O NPersonal Injury Hazard. Any instrument maintenance should be carried out by a qualified Hach ServiceTechnician. Please contact your local representative should you feel any maintenance or instrument adjustmentsare required.12.2 Sensor maintenanceThe sensor spot needs to be replaced about once a year. It is recommended to calibrate the sensorevery 6 months for beverage applications with multiple CIP. The procedure is very simple and takesno more than a couple of minutes. Based on the measurement range of oxygen, the sensor lifetimecan be shorter and the maintenance—and calibration—frequency increased. If there are bleachingcompounds and strong oxidants (e.g., ClO2) in the sample, the sensor lifetime can also be shorter.12.2.1 Equipment requiredNote: Check the Ksv factor of the new spot on the maintenance kit box. If this is different to the Ksv value displayedin the factory parameter (see Configure manual calibration on page 23) update the factory parameter to the newvalue.1. A replacement sensor spot2. The maintenance tool delivered with the sensor3. O-ring supplied with the sensor spot12.2.2 Sensor spot removal1. Push the maintenance tool (square sides upmost) as far down as possible over the old sensor spot. Continueto push down on the tool and turn gently until the square sides of the tool and the square slots of the sensorspot engage. The tool should then drop into position.2. Turn the tool counter-clockwise to unscrew the old sensor spot.3. When unscrewed completely simply lift out the old sensor spot. Pull off the maintenance tool and discard theold sensor spot.Note: Check the O-ring. If it appears damaged in any way then using a pair of tweezers remove and replace it with the new O-ringfrom the maintenance kit.English 25