Dissolved Oxygen Meter
521-050
7 9907X0046 Issue 1
8.1
Air saturation
This will directly assign a percentage dissolved oxygen to air saturated
water and further readings are then given as a percentage of this air
saturated water sample. All measurements in this range are given to a
resolution of 1%.
Calibrate the probe in zero solution as above.
Fill a suitable container with a sample of clean water. Press the Cal key.
Hold the probe so that the membrane is close to, but not touching, the
surface of the water (approximately 1 cm above).
Once the reading has stabilised press the Cal Key.
This will cause the primary display to read 100% DO
2.
8.2
% Oxygen saturation
This will give a reading of 20.9% in air where 20.9% is the amount of
oxygen as a percentage of oxygen in air and will give a reading
directly as a percentage of oxygen in the sample. All measurements in
this range are given to a resolution of 0.1%. Calibrate the probe in
zero solution (see section 8).
Fill a suitable container with a sample of clean water. Press the CAL key.
Use the
▲▼ keys to adjust the primary display to read 20.9%. The MAN
annunciator will be displayed. Hold the probe so that the membrane is close
to, but not touching, the surface of the water (approximately 1 cm above).
Once the reading has stabilised press the CAL key. The instrument
measures the manually entered value (20.9%). Once a calibration value is
set manually the instrument will automatically calibrate to this value until an
alternative value is entered.
8.3
mg/l
If measurements are to be performed in mg/l it will be necessary to
enter the current barometric pressure and salinity values.
8.4
Barometric pressure
Press the MODE key until the secondary display shows
the BAR annunciator for barometric pressure.
Adjustment to the correct value can be made by using
the
▲▼ keys.
Summary of Contents for 521-050
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