O 3 Generator Temperature Control; O 3 Generator Pneumatic Sensor; Photometer Operation; Figure 9-14. O 3 Generator Temperature Thermistor And Dc Heater Locations - Teledyne T750 User Manual

O
In order to operate at peak efficiency the UV lamp of the O
constant 48ºC. If the lamp temperature falls below 43ºC or rises above 53ºC, an Alert is
issued by the CPU.
This temperature is controlled as described in section 9.4.3.2. The location of the thermistor
and heater associated with the O
Figure 9-14. O
O
A pressure sensor, located on the O
monitors the output gas pressure of the regulator on the O
regulator is adjusted at the factory to maintain a pressure of 20 PSIG on this line. If the
pressure drops below 15 PSIG or rises above 25 PSIG, an Alert is issued.
P O
9.8.
HOTOMETER
The calibrator's photometer determines the concentration of Ozone (O
drawn through it. Sample and calibration gases must be supplied at ambient atmospheric
pressure in order to establish a stable gas flow through the absorption tube where the gas'
ability to absorb ultraviolet (UV) radiation of a certain wavelength (in this case 254 nm) is
measured.
Gas bearing O
tube. Measurements of the UV light passing through the sample gas with and without O
present are made and recorded.
Calibration of the photometer is performed in software and does not require physical
adjustments. During calibration, the CPU's microprocessor measures the current state of
the UV Sensor output and various other physical parameters of the calibrator and stores
them in memory. The CPU uses these calibration values, the UV absorption measurements
made on the sample gas in the absorption tube, and data regarding the current temperature
and pressure of the gas to calculate a final O
083730750B DCN8606
Generator Temperature Control
3
generator is shown below:
3
Generator Temperature Thermistor and DC Heater Locations
3
Generator Pneumatic Sensor
3
3
PERATION
and zero air are alternately routed through the photometer's absorption
3
generator is maintained at a
3
generator and photometer, pressure/flow sensor PCA,
generator's zero air supply. The
3
concentration.
3
) in a sample gas
3
3
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