Thermo Orion 410Aplus, Инструкция по эксплуатации

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Orion Benchtop pH/ISE Meter Instruction Manual
Other Measurement Modes
56
H. Orion 920Aplus Dissolved Oxygen Measurements
Dissolved Oxygen measurements are displayed in ppm when the
Orion 9708 Dissolved Oxygen Electrode (Orion 970899) is used with the
Orion 920Aplus Meter. Perform the following steps to prepare the meter
and calibrate the electrode.
1. Connect the D.O. electrode Orion 9708 to meter. Leave electrode
mode switch “OFF”.
2. Press 2nd then channel to select the correct channel.
3. Press 2nd then electrode id . Press 2 to select O2. Press yes .
4. Disconnect ATC probe.
NOTE: ATC probe must not be connected to the meter
and the meter should be calibrated to pH 7 at 25.0˚C.
5. Press mode until pH mode indicator is displayed.
6. Press hold . Turn the hold feature off.
7. Press measure . Press set temp . Enter 25.0 at the prompt and
press yes .
8. Turn the mode switch on the electrode to BT CK. Good battery
operation is indicated by a reading of 13.40 or greater on the meter.
9. Turn the mode switch on the electrode to ZERO. Use the zero
calibration control on the electrode to set the meter to read 0.00.
10. Insert the reservoir (funnel) into a BOD bottle containing enough
water to just cover the bottom. Insert the electrode, making sure that
the electrode tip is not immersed in the water and does not have water
droplets clinging to the outside of the membrane. Let stand
approximately 30 minutes to ensure water saturation of air in the
BOD bottle. This bottle should be used for storage
between measurements.
11. Turn the electrode mode switch to the AIR position. If measurements
are being made at sea level, use the AIR calibration control on the
electrode to set the pH meter reading to the prevailing barometric
pressure in mm Hg (divided by 100). If the barometric pressure is
unknown, the elevation is above sea level or the sample has a salinity
greater than two parts per thousand, consult
Table 1 found in the
Orion 9708 Instruction Manual to obtain the correct AIR setting.
12. Turn the electrode mode switch to H
2
O for sample analysis.
13. Record direct ppm reading from meter.