To enable smooth operation, place all the necessary parts on a table, but leave some free space in front of the ozonizer, if necessary.
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Write down the following information:
Date: _______ Station: _________ Operator: __________
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Check the label on the flight box and record the information here.
Ozone sensor number:
Manufacturer:
Date of manufacture:
Pump pressure:____________ in Hg
Pump voltage:____________ V DC
Pump current:____________ mA
Flow rate:_____________s/100 ml
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Connect the ozone sensor to the ozonizer (motor, output, sensor leads).
- Turn on the ozonizer.
- Record IB0 before applying
any ozone to the sensor:
IB0_____________μA
- Condition the pump and the dry sensor with HI O3 for 30 minutes.
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After 10 minutes of HI O3, check the following values from the
ozonizer:
Values in ozonizer Value Measured Limit values Pump voltage _________ V 12–13 V Pump current _________ mA ECC-6A: < 115 mA, Model Z <100 mA Head pressure _________ Pa > 700 hPa app. 20 in Hg Vacuum (this is a minus value) _________ Pa > 500 hPa app. 14.8 in Hg - Turn off HI O3. Run NO O3 for 5 minutes.
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Charge the sensor cathode and anode. Use a different syringe for cathode and
anode.
Charge sensor cathode with solution 3.0 cm3 and wait 2 minutes.
Charge sensor anode with solution 1.5 cm3.
After using the syringes, rinse them carefully with distilled water. -
Run NO O3 for 10 minutes.
The current starts to decrease. Sensor background current after 10 minutes (typically the value is under 1.5 μA) on NO O3: ____________μA
- Run on moderate ozone (about 5 μA) for 5 minutes.
- Check that the LCD display background current starts to rise to 5 μA or more. Use the OZONE CONTROL tube to adjust and maintain the current at 5 μA for 5 minutes.
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Run on NO O3 for 10 minutes. Check that O3 decreases by 70-80% in 1 minute.
Record the background current: IB1____________μA
The background current may be 0.2 to 0.5 μA at this time. It decreases during the next days as the sensor is stored.
- Switch everything off.
- Add 3 ml to cathode.
- Short-circuit the ozone sensor wires.
- Put the ozone sensor back to the flight box and store it in a dark, clean-air environment at a temperature of +20 ... +25 °C until it is used.
After these preparations, a sensor cleaning process takes place, whereby both half cells (anode and cathode) and ionbridge get in balance.