Section 15 Maintenance And Troubleshooting; Instrument Maintenance; Sensor Maintenance; Equipment Required - Hach ORBISPHERE K-M1100 User Manual

Section 15 Maintenance and Troubleshooting

15.1 Instrument maintenance

Personal Injury Hazard. Any instrument maintenance should be carried out by a qualified
Hach Service Technician. Please contact your local representative should you feel any
maintenance or instrument adjustments are required

15.2 Sensor maintenance

The sensor spot needs to be replaced about once a year. It is recommended to calibrate the
sensor every 6 months for beverage applications with multiple CIP. The procedure is very
simple and takes no more than a couple of minutes. Based on the measurement range of
oxygen, the sensor lifetime can be shorter and the maintenance—and calibration—frequency
increased. If there are bleaching compounds and strong oxidants (e.g., ClO
sensor lifetime can also be shorter.
Important Note: The shelf-life of the K1100/M1100 LDO spot is 2 years prior to first use.

15.2.1 Equipment 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.

15.2.2 Sensor spot removal

1. Push the maintenance tool (square sides upmost)
2. Turn the tool counter clockwise to unscrew the old
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.
sensor spot.
C A U T I O N
) in the sample, the
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