Ph Calibration; Point Ph Calibration; Orp (Redox) Calibration; Point Orp Calibration - Thermo Scientific AquaPro User Manual

4.1

pH Calibration

1. From the main measurement screen, press Menu key and select Calibration line.
2. Select the pH channel you wish to calibrate.
Note: DataStick pH calibrations are performed using the DataStick card.
4.1.1

1 Point pH Calibration

1. Select a point for calibration that is near or at the point you are measuring. The point can be a sample value
or a buffer point.
2. Under the calibration screen, select the channel to be calibrated and press enter to start calibration. The
measurement will be adjusted to the new calibration point.
4.1.2 2 Point pH Calibration
1. Select 2 points that represent the measurement range using either US buffers (4.01, 7.00, 10.01) set or DIN-
19267 buffers (1.09, 4.65, 6.79, 9.23, 12.75). Be sure to use fresh buffers for the greatest accuracy.
2. Perform the calibration following the screen prompts for the buffer order of measurement.
3. Slope and offset value will be displayed and saved in the calibration log.
4. Default temperature compensation is at 20°C if there is no live temperature measurement during calibration.
5. A calibration timer may be set to automatically remind the user to recalibrate at the specified time interval.
Default is 30 days.
4.2

ORP (Redox) Calibration

1. From the main measurement screen, press Menu key and select Calibration line.
2. The AnalogPlus ORP uses the same card as the AnalogPlus pH uses.
Note: DataStick ORP calibrations are performed using the DataStick card.
3. Select a standard for the ORP calibration. Do not use Orion ORP standard for the calibration as it will
damage the probe. Select either 200 mV (order number ORPSOL200) or 600 Mv (order number
OPPSOL600), whichever is closer to your expected measurement point, or perform a sample calibration.
4.2.1

1 Point ORP Calibration

1. Select a point for calibration that is near or at the point you are measuring. The point can be a mV standard
or a sample value.
2. Under the calibration screen, select the channel to be calibrated and press enter to start calibration. The
measurement will be adjusted to the new calibration point.
Thermo Scientific AquaPro Analyzer User Guide 40