Section 14 Maintenance And Troubleshooting; Instrument Maintenance; Sensor Maintenance; Equipment Required - Hach ORBISPHERE K1200 User Manual

Section 14 Maintenance and Troubleshooting

14.1 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

14.2 Sensor maintenance

The sensor spot needs to be replaced about once a year. 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., ClO2) in the sample, the sensor
lifetime can also be shorter.
Important Note: The shelf-life of the K1200 LDO spot is 2 years prior to first use.

14.2.1 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.

14.2.2 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.
CAUTION
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