Orion Benchtop pH/ISE Meter Instruction Manual
Other Measurement Modes
50
C. Orion 520Aplus, 525Aplus, 720Aplus, 920Aplus
Millivolt Measurements
The Orion 520Aplus, 525Aplus, 720Aplus, and 920Aplus may be used to
measure absolute or relative millivolts. These modes may be used for
titrations, oxidation/reduction (redox) potential measurements or calibration
curves. Detailed instructions for any Orion electrode are given in the
appropriate electrode instruction manual. Titration instructions are included
in the Orion Redox Electrode (Orion 9678 or 9778) instruction manual, or
in standard analytical chemistry texts.
Absolute mV
To measure absolute millivolts, press
mode
until the mV mode indicator is
displayed. The millivolt potential will be displayed in the main field and
the temperature will be displayed in the prompt line. The range is ±1600.0
mV with a resolution of 0.1 mV.
Relative mV
The range is ± 1999.9 mV with the absolute range being ±1600.0 mV.
Relative mV Calibration
Prompt
Key Press/Action
1.
Press
mode
until RMV is displayed.
2. 25.0˚C READY
Press
calibrate
.
3. CALIBRATE RMV
Place electrode(s) in the standard.
4. READING STANDARD
Wait for a stable electrode response.
5. READY
0.0 will be displayed in the
ENTER VALUE
main display. Press
yes
if this is
correct. Otherwise enter the desired
value for the standard then press
yes.
6. OFFSET IS 100.0
The offset is calculated
and displayed.
7. 25.0˚C READY
Rinse electrode(s) and place
into sample.
NOTE:
For Orion 525Aplus, 720Aplus and 920Aplus,
the channel number will be displayed in prompt line. For
Orion 920Aplus, the electrode ID will be displayed in
prompt line.
Содержание Orion 410Aplus
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