Oxygen Sensor Calibration; Calibration In Air At 100; Calibration With Zero Oxygen Standard - VIO OXY 70 Manuel D'utilisation

• Oxygen sensor calibration

The luminophore of the optical sensor is subject to aging and wear, therefore, you need to calibrate it
regularly in the air.

• Calibration in air at 100%

The ordinary calibration is performed at 100% in air.
Turn the instrument on, rinse the probe with distilled water, dry the probe thoroughly with paper towel and
proceed as follows:
• Place the probe in air with the membrane facing downwards and wait for 2 minutes. Then, connect the
sensor to the device.
In measure mode, press the key
•
On the display, it appears the string "POINT oxy 100.0"; the device will look for the value %O
Keep the sensor in air in a vertical position with the membrane facing downwards.
When the signal is stable, the red bands will be replaced by the stability icon
•
Press the button
On the display, the measured value flashes, then the sensor and finally the beacker
below on the left and indicates that the instrument is calibrated on value 100%O
• After the calibration, the instrument enters in measure mode automatically.

• Calibration with Zero Oxygen Standard

Normally, it is enough to calibrate the instrument in the air at 100% as explained previously. However,
sometimes it is also necessary to calibrate at 0%, for example when:
• A probe or luminophore is replaced by a new one
The probe is not used for a long period of time (3-6 months)
•
• The instrument does not calibrate at 100%, in this case calibrate it before at 0%.
• The instrument does not measure correctly
For calibration at 0%, proceed as follows:
Turn the instrument on, rinse the probe in distilled water; dry the probe thoroughly with paper towel and
proceed as follows:
• Put the probe in the Standard Zero Oxygen and wait for 5 minutes.
• In measure mode, press the button
the button again.
• Press the button
On the display, the string "POINT oxy 0.0" appears; the device will search for the value %O
•
• Gently stir the probe in the Standard and eliminate any air bubbles under the membrane, moving the
sensor.
The scrolling on the display of four red bands
•
Consider the measurement truthful only when the stability icon appears
•
• Confirm the value by pressing the button
• The instrument automatically returns to measure mode.
• The beaker icon
0% O .
2
UM Serie Oxy70Vio EN rev.0 28.05.2020
to enter in calibration mode.
, as indicated by the string "PRESS OK".
, remain in Menu DO SETTINGS P5.0 and confirm pressing
again, confirm the entry into submenu CAL 0 P5.1.
appears at the bottom left, indicating that the instrument is calibrated on value
16
means that the measurement is not stable yet.
.
= 100 %.
2
.
appears
.
2
= 0%.
2
.
EN