Table 3. Baseline measurement noise at various data logging intervals
2.3. Operational limits and warnings
• Environmental limits: Only operate the ObservAir within the
conditions listed in Table 1: Temperature and relative humidity must
remain between 5 to 40ºC and 15 to 80%, respectively. Exceeding
these limits may damage the sensor.
• Moisture/rain: The ObservAir must not be directly exposed to rain or
moisture of any kind without a DSTech enclosure. When fitted with
external sampling lines, these must be fitted with rain covers or water
catches to ensure that water is not aspirated into the sensor. Exposure
or aspiration of moisture may permanently damage the sensor.
• Direct sunlight: Do not operate the ObservAir in direct sunlight for
extended periods without a DSTech enclosure. Even with a DSTech
enclosure, direct sunlight may compromise data integrity. Exposing
the bare sensor to direct sunlight may result in the sensor overheating,
and/or erroneous data generation.
• Filter replacement: Filter tab must be changed regularly for best BC
measurement performance. Failure to replace the filter over extended
periods may result in damage to the pump if the filter becomes
completely saturated.
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