RBR ODO sensor care and maintenance

The RBR optical dissolved oxygen sensors have an oxygen-sensitive substrate that requires special care. Any damage will permanently affect performance.

Avoid direct sunlight.

Never touch the sensitive element while cleaning or handling.

Use the storage cap when the sensor is not in use.

Storage

Store the RBR optical dissolved oxygen sensor in the dedicated storage cap to protect it from damage.

Storage caps are provided with the instrument. Contact RBR if a replacement is needed.

Short-term storage (three weeks or less)

  1. Fill the storage cap with clean water until about 50% full.

  2. Place the cap on the sensor and gently push it past the locking pin.

  3. Refill the water periodically during storage. The cap is semi-watertight and will leak over time.
screenshot 2023 03 27 at 1 32 09 pm
Fig. 29.    The RBRcoda ODO with storage cap: note the red arrow showing the location of the locking pin

Long-term storage (more than three weeks)

For longer storage periods, store your sensor dry. Rehydrate for five days before deployment.

  1. Place an empty cap on the sensor and gently push it past the locking pin.

  2. Before deployment, fill the storage cap with clean water as for short-term storage, place it on the sensor, and rehydrate for five days.

It takes up to five days for a dry ODO sensor to equilibrate after being placed in water. Insufficient hydrating time before deployment may lead to unreliable data.
14347f07-aff6-4465-8c71-698fef7044d6.png
Fig. 30.    RBRduet³ T.ODO ready for storage

First deployment

RBR ships the RBRduet³ T.ODO instruments with a hydrated storage cap on, so that the instrument is ready for its first deployment.

However, long transportation times and low cabin pressure may cause the water to evaporate. Verify that the storage cap is still wet. If not, rehydrate the sensor for five days before deployment.

Calibration

Check your sensor calibration before each deployment in saturated fresh water. If the readings are not within 1% of 100% saturation, recalibrate the instrument using a one-point calibration. Typically, | fast instruments may need recalibration more often than standard or | slow. See Ruskin User Guide: Compact Instruments³ for user calibration instructions.