In-Situ Con TROLL PRO Operators Manual (purchased after 10 May 2012) - Manual (Page 18)

800-446-7488 18 www.in-situ.com
Figure 3.3 Beginning the 1-point calibration; accepting or canceling the calibration.
Controller 2-Point Calibration (100% and 0% Saturation)
100% Calibration Point
1. Set up the calibration equipment. See page 17.
2. From the Con TROLL PRO Main screen, select Menu, Calibrate, RDO PRO or RDO
PRO-X.
3. Select Saturation, then select 2-point cal.
4. Press OK to start the 100% saturation calibration.
5. You will see the Calibration Beginning icon next to the % Sat value. When the
calibration is complete, choose Stable to accept the 100% calibration point and
proceed to the 0% point or Cancel to return to the previous calibration.
0% Calibration Point
1. Remove the sponge from the calibration chamber.
2. Ensure the calibration cap, with the vent hole, is on the top of the calibration
chamber.
3. Fill the calibration chamber to the fill line with approximately 60 mL of fresh sodium
sulfite solution.
1 Fill line
2 Temperature sensor
Figure 3.4 Calibration chamber fill line and submerged sensors
4. Completely submerge the sensor, making sure that the temperature sensor is also
under the surface of the solution. Do not allow the sensor to rest completely on the
bottom of the calibration chamber. Leave at least 1.25 cm (0.5 in.) between the
surface of the sensing material and the bottom of the chamber.
5. Press OK to start the 0% saturation calibration.