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727-3 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.
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Features
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
Insensitive to flow variation
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Performance
Range: 0-9.99 ppm (0-999 pphm)
Lower Detectable Limit: 0.02 ppm
Accuracy: +4% (Based on Beer’s Law)
Reproductibility: +1% or 2 digit, whichever is greater
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
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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
Physical
Weight: 7 kg (15 lbs)
Dimensions: 35 cm W, 17 cm H, 48 cm D (14” x 7” x 19”)
Ordering Information
Model 727-3 Ozone Monitor
UV technique, 115 V, 50 to 60 Hz.
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