Thermo Scientific Orion Star A111, Reference Manual

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10 Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Setup Examples
Automatic pH Buffer Recognition Selection
1. In pH measurement mode, press .
2. Press twice.
3. Press to select automatic buffer recognition (AUTO) or manual calibration (MAN).
4. If automatic buffer recognition was chosen, press . Press to select USA or DIN buffer set
for automatic buffer recognition.
5. Press to save configuration and to return measurement mode.
Read Type Selection
1. In measurement mode, press .
2. Press in setup until “4.0” is shown on the top line and “READ” is shown on the lower line.
Press .
3. Press or to select the measurement mode:
CONT = Continuous
AUTO = AUTO-READ™
4. Press to save selection. Press the key to return to measurement mode.
Note:
In AUTO-READ mode, the meter will display the measurement as it stabilizes and lock and hold the
measurement when it is stable. AR and unit of measure will blink until the reading is stable. When the
reading is stable it is held on the screen and AR is lit. Press to take a new measurement.
In Continuous read mode, the meter will continuously measure and update the display. The unit of
measure will flash. When the reading is stable, “READY” will appear. This read type is useful when
performing an experiment that requires continuous measurements to be taken, regardless of the
measurement stability.
Reviewing pH Calibration Slope Data
1. In pH measurement mode, press . Press five times so that "6.0" is on the top, secondary
display and "CAL" is on the larger, primary display.
2. Press to view slope. If a 3-point calibration was done, press to view the second slope
segment, and again to display the average slope (SLP.A).
3. Press to return to measurement mode.