Dissolved Oxygen Settings
The meter contains 5 dissolved oxygen settings and 7 general settings
in the setup menu.
Calibration Points
Set the number of calibration points.
Pressure Coefficient
Set the barometric pressure coefficient according to
the local altitude.
450.0 to 850.0 mmHg, 60.0 to 113.3 kPa
(default 760.0 mmHg, 101.3 kPa)
Salinity Coefficient
Set the salinity compensation coefficient of sample.
0.0 to 50.0 ppt (default 0.0)
Resolution
Set the resolution of the dissolved oxygen
measurement.
0.01 mg/L, 0.1% (default)
Measurement Units
Set the default dissolved oxygen, barometric pressure
and temperature units.
Milligrams per liter (default)
Millimeter of mercury (default)
Degrees Celsius (default)
If you want to change the current settings, press and hold the key
to enter the setup menu. Press the / key to select an option and
press the Enter key to confirm.
Refer to the Setting a Default Option section for detailed
instructions on page 7.
The following table describes the relationship between the altitude
and barometric pressure, make sure to set a compatible parameter
before the calibration and measurement.
During the barometric pressure and salinity settings, press and hold
the / key will make the value change faster.
Dissolved Oxygen Calibration
The 9 series meter allows 1 or 2 points calibration in the dissolved
oxygen mode. If you have selected the 1 point calibration in the setup
menu, we recommend that you perform a 100% saturation calibration
in the air-saturated water. If the 2 points calibration is selected, the
zero oxygen solution needs to be used.
During the calibration and measurement, the temperature sensor on
electrode must be immersed in solution completely and the solution
should keep 0.3 m/s of minimum flow rate to avoid oxygen starvation
at the membrane.
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