In-Situ RDO PRO Process Optical Dissolved Oxygen Sensor Manual - Manual (Page 5)

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1.2 Serial Numbers
The instrument serial number is engraved on the side of the unit. The cap serial number is
programmed on the memory chip inside the cap.
1.3 Unpack the Probe
1. Remove the probe from the box and other packaging materials.
2. Unscrew the nose cone from the probe and remove the red protective dust cap from the sensor.
Save the dust cap for later use.
Nose cone Dust cap
3. Remove the RDO cap from the storage sleeve.
4. Align the arrow on the cap with the index mark on the probe and firmly press the cap onto the
probe, without twisting, until it seals over the probe body.
 Do not allow moisture or atmospheric humidity inside the cap. Keep the cap in its
sealed package until you are ready to install it. Install promptly. Ensure that the O-ring
grooves are dry and the O-ring is not rolled or pinched inside the cap.
 The cap lifetime is one (1) year after the first reading has been taken. Install by the
date printed on the package.
5. Reattach the nose cone.
Page 5 Introduction