In-Situ Con TROLL PRO Operators Manual (purchased after 10 May 2012) - Manual (Page 19)

800-446-7488 19 www.in-situ.com
6. You will see the Calibration Beginning icon next to the % Sat value. When the
calibration is complete, choose Stable to accept the calibration or Cancel to return
to the pre-existing calibration.
Figure 3.5 Beginning the 2-point calibration; accepting or canceling the calibration
7. Once calibrated, remove the probe, and thoroughly rinse with water to remove any
excess sodium sulfite.
Calibration using the Concentration Option
1. From the Con TROLL PRO Main screen, select Menu, Calibrate, RDO PRO or RDO
PRO-X.
2. Select Concentration.
3. With the probe in the water, take a measurement using a method of choice.
4. Enter the value from your reference method as the “Standard Value” shown on the
Con TROLL PRO screen. Select Enter.
Calibration Hints
Nominal Stability vs. Full Stability
To meet the criteria for a valid calibration point, the change (delta) in probe response is
monitored over time. The controller is looking for the calibration solution temperature
and the probe readings to settle over a specific time period. The criteria for Full Stability
are designed to meet the published specifications. The criteria for Nominal Stability are
designed to shorten the calibration time when an approximate calibration is acceptable.
Factory Recalibration
Proper maintenance can improve your results and extend the life of the instrument.
l
RDO PRO and Aqua TROLL 400 instruments use the RDO Classic Sensor cap
that must be replaced annually. When this cap has expired, the exclamation icon
appears on screen.
l
RDO PRO-X Probes use RDO-X Sensor caps that typically last 2 years. If the
RDO-X Sensor cap has exceeded its recommended service period, or if the cap
has sustained significant abrasion The Service Needed
icon appears on
screen.