Hach-Lange ORBISPHERE K1100_M1100 Operator Manual - Manual (Page 99)

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Section 14 Maintenance and Troubleshooting
14.1 Instrument maintenance
14.2 Sensor maintenance
The sensor spot needs to be replaced about once a year, though for M1100 sensors this will
also depend on the CIP frequency. The procedure is very simple and takes no more than a
couple of minutes.
Important Note: The shelf-life of the K1100/M1100 LDO spot is 2 years prior to first use.
14.2.1 Equipment required
14.2.2 Sensor spot removal
CAUTION
Personal Injury Hazard. Any instrument maintenance should be carried out by a qualified
Hach Lange Service Technician. Please contact your local representative should you feel any
maintenance or instrument adjustments are required
A replacement sensor spot (No. 1) and O-ring
(No. 3) supplied with the sensor spot.
The maintenance tool (No. 2) which is
delivered with the sensor.
1. Push the maintenance tool (square sides upmost)
as far down as possible over the old sensor spot.
Continue to push down on the tool and turn gently
until the square sides of the tool and the square
slots of the sensor spot engage. The tool should
then drop into position.
2. Turn the tool counter clockwise to unscrew the old
sensor spot.