123200 03 26-03-2004 31
For CTC-650 A, MTC-650 A:
1. Turn the well upside down to expose the bottom of the
unit.
2. Use a wire cutter to cut the straps holding the wires
together.
3. Remove the screw and clamp holding the reference
sensor in position.
4. Pull out the old reference sensor and replace it with the
new spare part 105476.
5. Before mounting the new sensor, make a 90° bend
between the two ceramic tubes.
6. Mount the new reference sensor in the same position as
the old sensor.
7. Ensure that the two wires in the bend between the
ceramic tubes do not short-circuit.
8. Replace the clamp and the screw as before.
For CTC-320 B:
1. Place the well on its side on a table with the reference
sensor wire facing upwards.
2. Remove the screw and clamp holding the reference
sensor in position.
3. Pull out the old reference sensor and replace it with the
new spare part 105290.
4. Insert the new reference sensor in the same position as
the old sensor.
5. Ensure that the two wires in the bend between the
ceramic tubes do not short-circuit.
6. Replace the clamp and the screw as before.
For CTC-650 B:
1. Place the well on its side on a table with the reference
sensor and earth wire facing upwards.
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