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Thermo Scientific Orion Star LogR™ Meter User Guide
LogR and Automatic Temperature Compensation (ATC) Calibration
LogR Calibration Technique
LogR calibration can be done by using an ATC probe or with a NIST reference. An
accurate and the fastest method is to use an ATC probe. The most accurate method
is to use a NIST reference, such as a NIST-traceable thermometer.
Note:
The meter defaults to using an ATC probe for LogR calibration. If the
temperature reading for the ATC probe requires adjustment, follow the instructions
for ATC probe calibration technique on the next page.
Prior to starting LogR calibration, the temperature reading and compensation setting should
be LogR (shown as LOgr on the third display line.) If this is not the case, refer to the section
titled Temperature Reading and Compensation Settings. The first screen when starting the
temperature calibration shows the setting being calibrated.
To calibrate with the use of an ATC probe:
1. In the measurement mode, press
until the arrow icon points to the top line.
2. Select temperature mode by pressing
/
until the measurement line
shows temperature.
3. Rinse pH electrode and ATC probe with distilled water. Place both electrode and
probe into the solution. Stir moderately. Press
4. CAL. 1 will display. When the reading stabilizes, the arrow icon and first digit will
flash. The meter will display the temperature measured by the ATC probe.
5. Press
to proceed to the next calibration point and repeat steps 3 and 4 or
press
to save and end the calibration.
