Equipment Required - Hach ORBISPHERE 51 Série Manuel D'utilisation Simplifié

8.2.1 Equipment required

1. A replacement sensor spot
2. The maintenance tool delivered with the sensor
3. O-ring supplied with the sensor spot
8.2.2 Sensor spot removal
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.
3. When unscrewed completely simply lift out the old sensor spot. Pull off the maintenance tool and discard the
old 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-ring
from the maintenance kit.
8.2.3 Sensor spot replacement
Avoid scratching or damaging the sensor spot (the black surface on the sensor head) during this process.
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