727-3A OZONE MONITOR
For Mast Development 700 Series Test Chambers
Theory of Operation
Upon entering the instrument, the sample is diverted by the gas valve into the catalytic converter which selectively changes any ozone present to oxygen. This sample, with no ozone, then passes though the absorption chamber where the detector measures the amount of ultraviolet light transmitted through it. Upon completion of this cycle, the valve is activated and the sample containing ozone is passed through the absorption chamber. The absorption by ozone of the ultraviolet radiation at a wavelength of 254nm is measured at the sample detector, and displayed in parts-per-million (ppm) ozone.
Features
-
Programmable alarm levels
-
6 pre-programmable tests
-
RS 232 data port
-
2 line LCD digital display
-
Automatic timed shutoff
-
Menu driven programming
-
Proven ultraviolet absorption technique
-
No Expendables: explosive, poisonous or other liquid, gaseous or solid
-
Direct Reading in parts per million and specific for ozone
-
Calibration based on Beer’s Law
-
Completely self contained
-
Automatic zeroing
-
Fast Response, 5 seconds for 90% of concentration
-
Fast warm-up
Specifications
-
Performance
-
Range: 0 – 9.99 ppm (0 – 999 pphm)
-
Lower Detectable Limit: 0.02 ppm
-
Accuracy: +3% (Based on Beer’s Law)
-
Calibration: Automatic zeroing
-
Reproductibility: 0.1%
-
Lag Time: 5 seconds
-
Rise Time: 1 measurement cycle
-
Fall Time: 1 measurement cycle
-
Zero Drift: None
-
Span Drift: 1% of calibration level/24 hr
-
Measurement Cycle: 20 seconds sampling
-
Method: Continuous, self-contained pump
-
Volume: 2 liters/minute
Operation
-
Ambient Temperature Range: 0° to 50° C
-
Relative Humidity Range: 5 to 95%
-
Warm-up Time: 20 minutes
-
Unattended Period: Up to 30 days
-
Power Requirements: 115V, 50 to 60 hz
Output
Digital Display: 0.00 to 9.99 ppm
Analog: 1V per 10 ppm