Information About Ldo70 Probe; Measuring Principle; Probe Storage - VIO OXY 70 Manuel D'utilisation

The string "MAKE A NEW CAL" invites the user to perform a new calibration of the pH sensor to be able to
work again.
Press the key to start the calibration.
•
P5.8 Reset of the DO parameter (Reset Settings)
If the instrument does not work properly or incorrect calibrations have been carried out, confirm YES with
button , in order to take all the parameters of the DO menu back to the default settings.
IMPORTANT: The factory reset of the parameters DOES NOT erase the stored data.
P5.9 Temperature calibration
All the instruments of this series are pre-calibrated for a correct temperature reading. However, if there is a
difference between the measured and the real temperature (usually due to a probe malfunction), it is
possible to perform an offset adjustment of + 5°C.
After the connection of the temperature probe, use the keys
offset value and confirm with

• Information about LDO70 probe

The LDO70 probe uses a luminescence optical technology for dissolved oxygen measurements in water.
This type of probe has many advantages compared to classical polarographic type sensor, some of these
are:
Zero polarization time, the instrument is always ready
•
No shaking of the sample because there is no oxygen consumption
•
• No electrolyte in the membrane
• No interferences with other gases (e.g. CO
Reduced maintenance time
•
Very fast response time
•
• Accurate even with small sample volumes
• Stable and accurate measurements even at low dissolved oxygen value.
Membrane on which is fixed the luminophore

• Measuring principle

On a permeable membrane to oxygen has been fixed a chemical substance called luminophore. Inside the
sensor, a light source pulses a light of blue colour that is reflected from the luminophore on an inner
photocell. When the oxygen, permeating through the membrane, comes in contact to the luminophore, it
modifies the blue light in proportion to the partial pressure of the oxygen. This variation is read by the
photocell which generates a proportional electrical signal.

• Probe storage

When the probe is not in use, store it in the storage cap containing distilled water. In this way, the
membrane is protected and hydrated, ready for use.
UM Serie Oxy70Vio EN rev.0 28.05.2020
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O-ring
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and to correct the temperature
EN