UV Measurement & Process Control

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Life After The UV HoneymoonEndMiddleSagging• Middle reading lower on middle to endcomparison• 15 % difference in irradiance levels• Rotate bulbs• Cooling issues?Aging• Middle reading higher• Arc bulb aging on ends•440mW/cm 2 in the middle vs.317 mW/cm 2 atthe end• Width of source to width of product?• Time to replace bulb?MiddleEndMulti-Lamp Systems
What should we monitor? UV Spectral Output• Match the UV light to your process andchemistry Different types of bulbs, variations inthe bulb over time and variations in the bulbwith power, power supplies• Diameter of bulb, cooling system and airflow inlamp housing• System manufacturer can tell you what types ofbulbs your system can use• Not always interchangeable due to powersupply-kicker• Variations between manufacturers, match toprocess• Ozone producing (more UVC) or Ozone free(material)• Buy bulbs based on best value and not thecheapest cost. Watch purchasing staff getting‘specialsBulb Type & Focus Indicator
Page 3 and 4: Are we speaking the same (UV) langu
Page 5 and 6: Why do we measure?• Repeatability
Page 7 and 8: Who is measuring UV and what is the
Page 9 and 10: Where the UV goes-relative penetrat
Page 11 and 12: Electrical Power• Amp MeterWhat s
Page 13 and 14: What should we monitor?• Before:
Page 15: Impact of System ChangesWhat should
Page 19 and 20: With 600 hours of run time would yo
Page 21 and 22: What should we monitor?Do you have
Page 23 and 24: Radiant Energy Density as a Functio
Page 25 and 26: How do we measure?Absolute Instrume
Page 27 and 28: UV Bandwidths60504030CBAV201000 100
Page 29 and 30: UV Measurement and Process Control
Page 31 and 32: Process or Cure WindowNormal Operat
Page 33 and 34: Sample Job LogDateLine Speed DwellT
Page 35 and 36: UV Formulation SpecificationsOrigin
Page 37 and 38: Why Calibrate?• Balance the amoun
Page 39 and 40: Instrument Optics: Spatial Response
Page 41 and 42: Instrument ElectronicsThreshold•
Page 43 and 44: Instrument with Low Sampling Rate &
Page 45 and 46: What ‘dialect’ of UV Watts are

UV Measurement & Process Control

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