amplifier. If the Oxygen concentration is above the full scale value, it
will not be measured accurately. Usually, the analyzer can measure
oxygen concentrations between the ranges of the 20-80%accurately.
Response
The response time of an analyzer is defined as the time taken togo
from the beginning of a noticeable change to 90% of the final level.
The beginning is often defined as 10% of the final level. This is also
called the “t90” time.The transit time of the gas is not included in this
measurement.
Calibration
Regularly performed on the upper end range of measurement, as
opposed to the bottom end or zero. Generally this is done by exposing
the sensor to a gas of known concentration, and making the analyzer
read that value.
Trace
Low levels of, in this case, oxygen. This term is used to describe
unwanted levels of oxygen as a contaminant, typically in the low ppm
levels.
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