In-Situ RDO PRO Process Optical Dissolved Oxygen Sensor Manual - Manual (Page 6)

2.0 Calibrate the RDO PRO Probe
Calibrate the probe with the Comm Kit Software and the Communication Device, or calibrate the
sensor directly with your controller. See Appendix A – Communication Device.
2.1 1-point Calibration
2.1.1 Water-Saturated Air Calibration
1. Remove the storage cap from the top of the calibration chamber and replace with the vented
calibration cap.
1 Storage cap
2 Vented calibration cap
2. Place the sponge wafer in the bottom of the calibration chamber and saturate with approximately
10 mL of water.
3. Gently dry the probe and sensing element with a paper towel, ensure that no water or debris is
on the probe or sensing element.
4. Place the probe in the calibration chamber so that the sensing element is about 2.5 cm (1 in.)
above the water-saturated sponge.
 Ensure that the sensor surface is dry when you place the probe into the calibration
chamber.
5. Wait 5 to 10 minutes for temperature stabilization prior to calibration. Do not leave the probe in
the calibration chamber for more than 30 minutes. This can allow condensation to form on the
surface of the sensing element, which will produce false low readings after calibration. If
condensation does occur, remove the probe. Thoroughly dry the sensing element, the probe,
and the thermistor before you perform the calibration procedure.
Page 6 Calibrate the RDO PRO Probe