Thermo Scientific Orion Dual Star Quick Start Manual page 2

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11a
2-Star pH Benchtop Meter Quick Start Guide
pH Autocalibration with Two Buffers
1. Press the power key to turn on the meter. See 1.
2. Select two buffers that bracket the expected sample
pH and are one to four pH units apart. See 2.
2
See Autocalibration Buffer Selection section.
3. Press the calibrate key. See 3.
4. Rinse the electrode with deionized water and blot
dry with a lint-free tissue. See 4.
NOTE: Do not wipe or rub the electrode, as static
4
buildup will occur.
5. Insert the electrode into the first buffer. See 5.
6. Wait for the pH icon to stop flashing and the
icon to start flashing. The meter should display the
temperature corrected pH buffer value. See 6.
6
If the displayed buffer value is incorrect or a
customer buffer is being used manually enter the
value by pressing the up/down arrow keys to
adjust each digit and the digits key to move to the
next digit.
7. Press the calibrate key. See 7.
8
8. Rinse the electrode with deionized water and blot
dry with a lint-free tissue. See 8.
NOTE: Do not wipe or rub the electrode, as static
buildup will occur.
9. Insert the electrode into the second buffer. See 9.
10
10. Wait for the pH icon to stop flashing and the
icon to start flashing. The meter should display the
temperature corrected pH buffer value. See 10.
11. Press the calibrate key and then press the
measure key to save and end the calibration. See
11a & 11b. The slope will be displayed and then the
11b meter will proceed to the measurement mode.
Autocalibration Buffer Selection
1. Press the setup key.
2. Press the up arrow key until PH is displayed on
the top line.
3. Press the line select key to move the icon to
the middle line. Press the up arrow key until bUF
is displayed.
4. Press the line select key to move the icon to
the bottom line. Press the up arrow key to select
the buffer set. USA is default setting.
USA = 1.68, 4.01, 7.00, 10.01, and 12.46
EUr0 = 1.68, 4.01, 6.86, and 9.18
5. Press the line select key to move the icon to
the top line. Press the measure key to return to
the measurement mode.
Measurement Mode Selection
1. Press the setup key.
2. Press the up arrow key until rEAd is displayed on
the top line.
3. Press the line select key to move the icon to
the middle line. Press the up arrow key until tYPE
is displayed.
Press the line select key to move the
4. icon to
the bottom line. Press the up arrow key to select
the measurement mode. AUtO is default setting.
C0nt = Continuous measurement mode
AUt0 = AUTO-READ measurement mode
™
tImE = Timed measurement mode
5. Press the line select key to move the icon to
the top line. Press the measure key to return to
the measurement mode.
Environmental Instruments
Water Analysis Instruments
166 Cummings Center
Beverly, MA 01915 USA
pH Measurements
1. Rinse the electrode with deionized water,
blot dry with a lint-free tissue, and insert the
electrode into the sample.
2. If the meter is in AUTO-READ mode, press the
measure key to take a measurement. Once the
reading stabilizes the AR icon will stop flashing
and the display will freeze. Press the measure
key again to take a new measurement.
3. If the meter is in the continuous or timed
measurement modes, the meter will
continuously take measurements and update
the display. Once the reading stabilizes the pH
icon will stop flashing.
Printing Data
In the AUTO-READ and continuous
measurement modes, every time the measure
key is pressed the meter logs the data on the
display. In the timed measurement mode, the
meter logs the data at the predetermined time
interval.
1. Press the view log key.
2. Use the up arrow key to scroll between CAL0
(print the calibration log) and SEnd (print the
measurement log).
3. Press the line select key to print the data.
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