Study of design and technology errors in ozone generating stations
In the process of operation of ozone generating stations with a crowing system of metal coaxial cylinders, quite often design or technology errors and defects occur, such as: eccentric arrangement of electrodes, air or metal inclusions in the dielectric and others. This article suggests models for studying the impact of design and technology errors and defects on the operation of ozone generating stations. By using these models, it is possible, at the stage of design, to make a quantitative evaluation of the impact of such errors and seek ways to overcome or compensate them. Since the described defects result from a number of factors, such as: environment, technological modes of operation and production, etc., attempts at ignoring them will lead to considerable deviation in the operative characteristics in the process of work and, subsequently, to failures or break-downs.
Portable Ozone Sensor
EcoZone™ Model EZ-1X
Ozone is easy to sense, but measurement can be very counter intuitive and tricky. The Eco Sensors® EZ-1X makes ozone sensing and monitoring simple and inexpensive. The instrument is not a primary standard and is sold for general monitoring rather than precise measurements. It can be used outdoors for short periods at moderate temperatures.
Sensor - The sensor is the only components of the instrument that is likely to fail or to require checkups. We recommend that the sensor be checked for satisfactory operation every three months, or more often in environments that are dusty, have high levels of chlorine or halogen compounds, or where there is dust or water spray. The sensor should be observed to see if it is responsive to changes in ozone level and if the ppm readings are reasonable. This can be done with the Eco Sensors model OG-2 hand-held ozone generator. Indications that the sensor is deteriorating or has failed are:
o Its response is significantly lower.
o The ozone concentration readings seem too high and tend to get even higher.
o The instrument doesn't respond at all and/or the bar graph does not go down to the green area after a brief warm-up.
Some of these problems can be compensated for by circuit adjustments or simple maintenance. Sensor replacement, however, requires an instrument technician and should be done by Eco Sensors or its authorized service representative. The replacement sensor is the model SE-6A.
WHY IT IS IMPORTANT TO MEASURE OZONE AT VARIOUS POINTS IN THE ROOM
Ozone concentrations can vary greatly at various locations, and the concentrations are often highest in unexpected places. Key points to consider:
o Ozone is much heavier than air and tends to sink to lower levels.
o Ozone has a low vapor pressure and so it does not try to fill the room uniformly. It tends to stay where it is.
o Ozone tends to cling to rough surfaces such as fabrics and breaks down (converts back to oxygen) when passing through restricted and obstructed passageways.
o Ozone reverts back to oxygen with a "half life" (time to go to half its original amount) typically of 10-30 minutes.
o Ozone easily can be confused by instrumentation with other oxidizing gases such as chlorine compounds, acid fumes, and nitric oxides (NOx). Strong "reducing" gases, such as vapors of alcohol and solvents, can reduce the apparent concentration of ozone.
o Ozone has a sweet smell, but the odor threshold varies widely by the person and by ambiental conditions. Therefore "smell" is not a reliable test for the presence or concentration of ozone.