Coupling the turbidity sensor

The turbidity sensor in the RBRsolo³ Tu is connected to the instrument via a coupler. The instrument has a custom-made female connector, which fits the male connector of the sensor. The coupler has two flanges with opposing threads. New instruments are shipped with the coupler securely tightened, making this connection watertight.

rbrsolo3 tu disassembly
Fig. 23.    RBRsolo³ Tu, with the sensor disconnected

Typically, you will never need to disconnect the sensor from the instrument. However, before deploying the RBRsolo³ Tu, it is important to verify that the coupler has not become loose. If that happens, you will see a small gap between the sensor and the coupler, or between the coupler and the base of the connector. Gently tighten the flanges to protect your instrument during deployment.

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Fig. 24.    Coupler on the RBRsolo³ Tu

In rare instances, it may become necessary to disconnect and reconnect the turbidity sensor. Follow the steps below.

Step Description

1

Disconnect the sensor

  1. Take the instrument in your left hand and hold it horizontally, with the sensor oriented to the right.

  2. With your left index finger and thumb, prevent the left flange from moving.

  3. With your right hand, hold the sensor tightly.

  4. With your right index finger and thumb, twist the right flange clockwise until loose.

  5. The sensor will drop into your hand.

2

Access the female connector

  1. Twist the left flange counterclockwise.

  2. Remove the coupler.

3

Lubricate the female connector (see Cables and connectors)

4

Reconnect the sensor

  1. Place the coupler back on the instrument.

  2. Twist clockwise until tight.

  3. Very carefully mate the sensor to the instrument (the pins on the sensor must be aligned with the corresponding holes).

  4. Press the sensor into the instrument to make sure the pins are inserted.

  5. Continue to hold the instrument with your left hand.

  6. With your right hand, hold the sensor tightly.

  7. With your right index finger and thumb, twist the right flange counterclockwise while slightly pushing the sensor in with your palm.

  8. Verify the tightness of both flanges.

Occasionally, the left flange may begin to loosen while you are tightening the right one. It usually means that the pins did not mate properly. Carefully align the pins again and press harder. Wiggle the sensor gently to make sure the pins are inserted.