Internal UV Ozone Photometer Page 9-
Sample Flow The sample flow sensor provides an
indication of the flow through the
photometer. Note the high value of the
C coefficient, which indicates that,
before it is processed by the 2
nd
order
polynomial, the flow sensor's signal is
very non-linear.
Sample Temperature The sample temperature sensor is used to
temperature compensate the measured
ozone. An incorrect calibration of this
sensor will result in erroneous ozone
measurements.
Sample Pressure The sample pressure sensor is used to
pressure compensate the measured ozone.
When the Photometer is inactive and the
pump is off, the Sample Pressure, as
viewed in the status screen, should
indicate the room's barometric pressure.
An incorrect calibration of this sensor
will result in erroneous ozone
measurements.
The third page of the Photometer Parameters, shown in Figure 9-,
contains parameters that govern the servo control of the ozone
generator when the Ozone Servo Control option is selected on page
1. If anything other than the standard configuration of the
photometer and ozone generator is used, it may be necessary to
adjust these constants in order to "tune" the servo loop. A more
detailed description about setting the constants on this page is
given in the section beginning on page 9-20.
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