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UV Measurement & Process Control:Theory vs. Reality
Overview of EIT Products & Measurement Techniques
Jim Raymont EIT Instrument MarketsSterling, Virginia USA
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TheoryThe analysis of a set of facts in their relation to one another A plausible or scientifically acceptable general principle or body of principles offered to explain phenomena Assumption, concession, premise, presumption, presupposition; generalization, guess, guesswork, inference, speculation, surmise; proffer, proposal, suggestion; feeling, hunch, impression, inkling, notion, suspicion; abstraction, concept, conception
Laboratory, ideal & very controlled conditions, process development, academic/experiments, projects
RealityThe quality or state of being real, a real event, entity, or state of affairs Something that is neither derivative nor dependent but exists necessarilySomething that actually exists Manufacturing/Production floor, factory conditions, products, deadlines, orders, customers
Theory vs. Reality
Adapted from Online Dictionary & Thesaurus by Merriam Webster
Ivory Tower vs. Production Floor
Theory vs. Reality
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Why measure?Who’s asking? Where do we measure? What should we measure?
Indirect UV parametersIndirect-monitorDirect UV (Joules & Watts)
How do we measure? Types of measurement?When/How often do you measure?
Process ControlUnderstanding UV measurement instrumentsUV Source & Instrument AdvancesHands on Practice
Presentation Content
Keep the UV Monkey off your back
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Are we speaking the same language?
UV Language-Speak the same UV Language
Irradiance (Intensity)• Expressed in watts or milliwatts per square centimeter (W/cm2 or mW/cm2)• Total radiant power of (all) wavelengths passing from all incident directions
onto an infinitesimally small area (cm2)• Depth of cure, penetration through pigments and opaque colors, adhesion to
the substrate
Radiant Energy Density (Dose)• Expressed in joules or millijoules per square centimeter
(J/cm2 or mJ/cm2)• Incorporates time as part of the measurement• One watt for One second = One joule
• Area under the irradiance curve• Often the only UV exposure guide number supplied• Important for total and complete cure of material
UV Glossary & Terminology: www.radtech.org Time
Energy Density
dA
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WhyWhy do we measure?RepeatabilityReliabilityVerificationDocumentationISOTrainingQualityCertificate of Conformance/Customer RequirementBecause we cannot see UVEstablish, Document and Use Process Control Limits to avoid UV Curing by Guessing!Art vs. Science
$
Reality: Many people do not measure until after they have a problem that costs them time & money, and then
it really costs them time and money
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Anything that you can measure, you have a better chance of controlling. Things that you do not measure become the cause of mysterious problems
Larry Goldberg-Beta IndustriesReality: UV can be measured and it can be controlled. If it is not measured it will cause mysterious problems
Not everything that counts can be counted, and not everything that can be counted counts.
Albert EinsteinReality: Document all process parameters initially and then decide what is important to continue counting, measuring, controlling and maintaining.
Why didn’t I think to say that…………
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Substrate
Supplier
UV Equipment
Supplier
ManufacturingEquipmentSupplier
Process Control & UV Measurement Instrumentation
Who is measuring UV and what is their motive?
Communication
Formulator/ChemistEstablish a specificationDetermine a process windowOptimize a processAcquire, service and maintain customerTend to be absolutemeasurements.
Customer/End User(Operator, Maintenance, Business,
Quality)• Maintain the process• Troubleshoot and operate in process
window• Record keeping• Production costs, Scrap, Profit• Tend to be relative measurements.
Reality: Communicate, Communicate, Communicate and work with suppliers that Communicate with each other!
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Where are we measuring? • UVA: 320-390nm Long-wave, blacklight, UV Inks,
• UVB: 280-320nm Middle-wave, erythemal response, medical applications
• UVC: 200-280nm Short-wave, germicidal (254 nm), absorbed by DNA, clear coats, surface cure, tack, chemical or scratch resistance
• UVV: 395-445nm Ultra Long-wave, wood products, opaques/whites, thick coats, adhesion, depth of cure
• VUV (Vacuum UV): 100-200 nm, Ozone < 200 nm
Reality: Don’t assume, clarify the bandwidth you are talking about
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Where the UV goes-relative penetration
Substrate Surface
Ink, coating, adhesive thickness
UVC UVB UVA UVV
Reality: Understand what kind and quantity of UV your formulation needs to cure. Match the source and equipment to it
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Reality Check: When is a Joule not a Joule?
Bandwidths are not defined and vary from manufacturer to manufacturer and how they are specified
EIT UVA 320-390 nm, Full Width Half Max (FWHM), CWL 365 nmIL UVA 250-415 nm CWL 365 nm
Specify units in measurement to avoid confusion and apples to oranges comparisons
300 mJ/cm2 Good300 mJ/cm2-UVA Better300 mJ/cm2-UVA EIT 320-390 nm Best
Where are we measuring?
Reality: Be specific when communicating instrument values
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EIT UVA 320-390 nm
IL UVA 250-415
nmEITUVA
The half power points or the full width half max (FWHM) defines EIT Bandwidths (i.e. 320 nm)
Where are we measuring? UVA-Spectral Bandwidth Comparisons
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What should we monitor?Dwell Time or Belt/Line Speed• Affects the amount of energy reaching the substrate• Actual speeds may vary widely from settings on the speed controller
and may not be linear (±25%)
Effects of varying the process speed from 4 fpm (blue) to 10 (black) fpm
Peak Irradiance remains the
same-Slight 2.9% difference
Radiant Energy Density changes as a function of the
process speed
At 4 fpm: 2096 mJ/cm2
At 10 fpm: 860 mJ/cm2
143% difference in Radiant Energy Density between the
two speeds
Reality: Independently test and confirm dwell time or belt/line speed
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Hour Meter• Number of hours on the current UV bulb• Hour meter does not indicate the number of starts and stops on the
bulb• Hour meter does not indicate at what temperature the bulb was
generating UV• Hour meter does not tell you the amount of UV being generated
What should we monitor?
Reality:
• Hour meter only gives you a rough indication of when you will need to replace the bulb
• Use a radiometer for confirmation
• Sourcing bulbs from one supplier will lead to consistent results-Buy on value, not price
• Changes in cooling can impact bulb life
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Electrical PowerAmp Meter
Measures the input power applied to the systemVariations in line voltage (up to 20%), system efficiency
Lamp Power SettingsThis is a measure of power applied to the “bulb”Watts per inch or cm (200-800+ WPI)WPI/CM estimate:Voltage x Amperage/Arc length of bulbWPI/CM settings-variations from actual, linearity of systemPower applied to system, not the effective amount of UV generated or effective amount reaching the cure surfaceDescribing lamp power is not the same as describing its output.A 600 watt/inch lamp does not produce 600 watts/inch of UV-it consumes it
What should we monitor?
Reality: Lamps with a (applied) power of 600 W/inch vary in UV output from <1 W/cm2 (arc) to > 6 W/cm2 (microwave) of UVA (EIT
320-390) Do not confuse input power to effective UV output.
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TypesConventional, Solid State, High Frequency, DC, Square vs. Sine
Power Supply
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Where the electrical power goes?
Reality: Only a small portion of the applied power generates UV
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Reflectors• 60-80% of energy reaching the substrate is reflected• Optimize reflected energy, reflector focus and lamp position
through design and maintenance programs • Shape, type, material, coating of reflector matched to process
What should we monitor?
Parabolic Reflectors
Elliptical Reflectors
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Parabolic vs. Elliptical reflectors, Time X-axis, Irradiance Y-Axis
Elliptical ReflectorParabolic Reflector
What should we monitor?UV Source to Cure Surface Distance
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Focused lamp
Time in seconds
UV
W/c
m2
What should we monitor?
Non-Focused lamp
UV
W/c
m2
Time in seconds
Reality: Non-focused lamps can be used for dimensional curing and to achieve the desired properties (gloss control)
UV Source to Cure Surface Distance
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The effect of moving the UV housing away from the cure surface
FOCUSED858 mW/cm2
2096 mJ/cm2
NON-FOCUSED290 mW/cm2
1707 mJ/cm2
UV Source to Cure Surface DistanceWhat should we monitor?
Time in seconds, All values UVA EIT 320-390
UV
W/c
m2
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Look across the bulb length• Middle to end comparison
• Middle reading lowerSagging-15 % difference in irradiance
levels • Rotate bulbs• Cooling issues
EndMiddle
What should we monitor?
Middle
End
Look across the bulb length• Middle to end comparison
• Middle reading higher• Arc bulb aging on ends
• 440mW/cm2 in the middle vs.317 mW/cm2 at the end
• Width of source to width of product?• Time to replace bulb?
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Lamps 1-3• Parabolic reflectors
Lamp 8• Out of focus
What should we monitor? Variation in a multi-lamp production line
1-3
7
8
9
Time in seconds
UV
W/c
m2
Lamp 7 vs. Lamp 9• Irradiance: 173 vs. 440 mW/cm2
• Energy Density: 58 vs. 93 mJ/cm2
• All values UVA EIT 320-390
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Before: Readings on a two lamp system Energy Density: 953 mJ/cm2 (UVA EIT 320-390)
Irradiance: 313 mW/cm2 (UVA EIT 320-390)
After: Readings on the same systemEnergy Density: 1203 mJ/cm2 (UVA EIT 320-390) + 26%Irradiance: 449 mW/cm2 (UVA EIT 320-390) + 43%
Only one thing doneReflectors were cleaned
What should we monitor?
Reality: One little thing can have a big impact in the UV reaching the cure surface
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• Match the UV light to your process and chemistry
What should we monitor? UV Spectral Output
• Different types of bulbs, variations in the bulb over time and variations in the bulb with power, power supplies
• Diameter of bulb, cooling system and airflow in lamp housing
• System manufacturer can tell you what types of bulbs your system can use
• Not always interchangeable due to power supply-kicker
• Variations between manufacturers, match to process
• Ozone producing (more UVC) or Ozone free (material)
Reality•Buy bulbs based on best value and not the cheapest cost.•Watch purchasing staff getting ‘specials’
Bulb Type & Focus Indicator
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Mercury Lamp Spectra“H” Lamp
Iron Additive Lamp Spectra“D” Lamp
Gallium Additive Lamp Spectra“V” Lamp
What should we monitor? UV Spectral Output
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UV Bandwidths- EIT Instruments
0.00
10.00
20.00
30.00
40.00
50.00
60.00
200 250 300 350 400 450 500
Wavelength (nm)
Tran
smis
sion
%
T %(New Extrernal Transmittance Proposed D) C B A V
CB
A
D
V
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UVA Energy Density: 537 to 487 mJ/cm2
UVA Irradiance: 309 to 290 mW/cm2 UVA EIT 320-390
NEWOLD
With 600 hours of run time would you change this bulb?
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Change Now?
OLDNEW
UVV Energy Density: 737 to 1331 mJ/cm2
UVV Irradiance: 397 to 734 mW/cm2 UVV EIT 395-445
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Do you have any additional parameters unique to your process or environment?
Examples:Inert Curing-Nitrogen, Quartz Plates, Supplier ChangesTemperature: Ambient, Exhaust, Water Cooled Humidity, Static, Handling, Storage
What should we monitor?
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State of the Art Equipment• Touch screen PLC controller
• Image based controls
• Lamp status
• Trouble shooting guides
• Wiring diagrams
• Focus Adjustment
Images courtesy of Miltec UV
Lamp Ready Lamp 80% Lamp 100%
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Images courtesy of Miltec UV
State of the Art Equipment-PLC Screens
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PLC Screen Images courtesy of InPro Technologies
State of the Art Equipment-PLC Screens for Online UV, Temperature and Airflow
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Irradiance (Intensity)• Expressed in watts or milliwatts per square centimeter (W/cm2 or mW/cm2)• Total radiant power of (all) wavelengths passing from all incident directions
onto an infinitesimally small area (cm2)• Depth of cure, penetration through pigments and opaque colors, adhesion to
the substrate
Radiant Energy Density (Dose)• Expressed in joules or millijoules per square centimeter
(J/cm2 or mJ/cm2)• Incorporates time as part of the measurement• One watt for One second = One joule• Area under the irradiance curve• Often the only UV exposure guide number supplied• Important for total and complete cure of material
Wavelength• Nanometers
UV Glossary & Terminology: www.radtech.org
Time
Energy Density
dA
UV Measurement Terms (Again)
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RadTech North AmericaMission: Expand the use of UV and EB technology through:
Information: technical; environmental health and safety; marketingEducation: government and non government organizations; potential usersPartnering: trade groups, publications, international counterparts Website: www.radtech.org
Glossary on UV Measurement
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Irrad
ianc
e
distance
Light intensity decreasesWith the square of theDistance.
Irradiance as function of distance
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surface area = 4/3πr2
Irradiance as function of distance
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Energy Density as a Function of Time
Ener
gy D
ensi
ty
Time
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Equal Joules = Equal Cure?• Area in each figure approximately equal• Represents the ‘area under the curve” or Joules/cm2
• Equal Joules ≠ Equal Cure?
Irrad
ianc
e
Time
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UV Measurement StrategiesFormulator/Chemist
Process Development and Design Goals:Reproduce & transfer the process to productionOptimize the cured properties of end product Tend to be absolute measurementsQuantify and communicate cure conditions
Irradiance (W/cm2, J/cm2)Bulb TypeExposure profile (speed, focus)Infrared?
Customer/End UserMonitoring Goals:
Verify that the key conditions remain
within specified limits
Measure and document changes
Ship good quality products
Communicate
Tend to be relative measurements
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0
20
40
60
80
100
120
140
160
180
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Trial Number
Peak
Irra
dian
ceProcess Design: Path Tuning for Uniform Peak Intensity
dθ
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UV Instrument SelectionEvaluate Application
LinearLinear travel, flat
Area FloodFlat or complex travel, lower irradiance levels, motion varies from timed exposure with no movement to complex
SpotSmall areas, liquid or fiber guides
OtherGermicidal
Select Right Instrument For ApplicationReading Type
Absolute or Relative
SizeProduct Type
Continuous-onlineNumeric Display of Irradiance & Energy DensityProfiling-irradiance over time
Source/Bulb TypeArcMicrowavePulsed (Xenon) LED
Bandwidth(s) (UVA, UVB, UVC, UVV, New-UVD)
Dynamic RangeExposure vs. curingBut I get readings…..
User Expectations
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Pulsed or Flash UV ApplicationsXenon “Pulsed UV light produces complete, deeper and faster curing, in the most demanding applications requiring low heat with high throughput.”
Applications• Optical disc manufacturing (CD lacquer curing, DVD Bonding, Blu-ray Disc™ top-coat curing)
• Medical device manufacturing (hydrogels, coatings on guide wires)
• Semiconductor manufacturing (wafer manufacturing, tape removal)
• Rapid curing of coatings on hard drives• Curing of sensitive wood finishes
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UV LED: Development of Semiconductor Based UV Sources
Packaged –Single Diode
Low Power –Small Arrays
Phoseon’s Systems -
Integrated Industrial System High Power – Large Arrays
Output: 0.5 W/cm2
Size: 12mm Dia
Output: 0.01 W/cm2
Size: 0.2mm DiaOutput: 4.0 W/cm2
Size: Scalable to 4m!
Fully Integrated SystemsWith Built-In Controls
Information Courtesy
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Irradiance Improvements
Information Courtesy
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Applications – Printing/InksDigital Printing – UV Inkjet (Wide Format and Single Pass)Screen and Press Applications
Information Courtesy
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UV LED
Images Courtesy Phoseon Technology & Summit UV
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How do we measure?Absolute Instruments
Absolute units (mJ/cm2 and mW/cm2), compare readings between curing units and locations
Relative InstrumentsRelative units, electronic signal proportional to lamp brightness (% intensity), on line continuous monitoring, feedback to display, PLC
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Absolute Instrument Examples
Absolute Instruments• Absolute units (mJ/cm2 and
mW/cm2)• Compare readings between curing
units and locations• Communication• Used in relative mode?
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Relative Instrument Examples
Relative Instruments• Relative units, electronic signal proportional to lamp brightness (%
intensity), • On line continuous monitoring, feedback to display, PLC• Long lasting stability of sensor • Can be used when an absolute instrument will not fit into the process
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UV Measurement and Process Control
We aren’t smart enough to know what matters and what doesn’t so
we copy everything Brian Harrison-Intel
Goals are deceptive-the unaimed arrow never misses
Charles Knief (Kimo’s Rules)
UV measurement can’t help you unless you document and record
the readings! Jim Raymont-EIT
Reality
1. Be as smart as Intel
2. No process window-will never be out of it. Know your process window, know your process, know you will have a job
3. Where did I put those readings?.......
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Process WindowThe range in which a process will work with the desired results
Adhesion, hardness, flexibility, gloss, texture, stain or scratch resistance, chemical rub, cross hatch, abrasion rub, color ID, registration
Ideal if the Process Window is forgiving and has a wide latitude. It takes work and timeInvest before production & confirm when things are working!
Starting guidelines from formulator?Operator Training, ISO/Procedure Documentation
Define your lower limits and document the readingsIncrease line speed/decrease applied power until you undercure, note readings and cushion by 20%
Upper limits? Monitor your readings by job, hour, shift or day as required to maintain quality
Reality:
1. Establish your process window during the design/development phase
2. Establish your process window when things are working
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Powder Cure RequirementsManufacturer’s Recommended Specifications
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Oven Temperature
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Process or Cure Window
Stop!Undercure LimitStop!Undercure Limit
Caution 20% Undercure Buffer RangeCaution 20% Undercure Buffer Range
Normal Operating WindowNormal Operating Window
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Process or Cure Window for Temperature Sensitive Substrates
Stop! Over temperature limit?Stop! Over temperature limit?
Stop!Undercure LimitStop!Undercure Limit
Caution 20% Undercure Buffer RangeCaution 20% Undercure Buffer Range
CautionCaution 20% Over temperature Buffer Range20% Over temperature Buffer Range
Normal Operating WindowNormal Operating Window
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Sample Job Log
Signature
22
Actual. Energy Density (J/cm2)
Irradiance(W/cm2)
Hour Meter
PowerWPI
Ind.
1.450.859780400254/12
OtherUV System: North Line Lamp: 2Line Speed Dwell Time
FPMDate
Equipment variablesIndicated vs. actual process speed
For each UV lamp systemHour meterPower settings (WPI, Amps)Irradiance (W/cm2)Radiant Energy Density(J/cm2)Lamp matched to chemistryFocus/Reflector condition
Other things to considerDate/job number Operator signature Mesh countFormulation typePass/fail on specific QC tests-cross hatch, rub, registrationMaintenance log of systemMaintenance due dateRadiometer type/bandwidths
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Production Floor-Monitor Trends
Spreadsheet or Program based trending
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Outside the Process Window?Relax and breathe deep! You have the process window established! Right?Gradual change towards caution area?Which way do you have to go?Perform system maintenance
Measure,Clean, Rotate, Measure. Any Improvement?
Replace lamps or adjust user controlled variables until you are back in your process windowWork and communicate with suppliers in good times and bad times
Reality: Get into “predict and perform preventative maintenance”routine vs. a “fix it when it breaks” routine
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UV Formulation SpecificationsFormulator Specification:
• 2x Hg lamps 80 W/cm, 5 meters per minute, forward feed
Improving the Specification:• 2x Hg lamps 80 W/cm, 5 meters
per minute, forward feed • Joules or Watts more important?• One 160-200 W/cm lamp work?• Lamp Type? (H, D, V) • Reflector type?• Thermal?
• Coating Thickness (Mils?)
Reality: Most specifications can be improved without revealing proprietary information
Distance from the lamp• Focus? Non Focus?
Radiometer values• Minimum irradiance• Minimum energy density• Instrument type• Bandwidth• 650 mW/cm2, EIT UVA (320-390)• 700 mJ/cm2, EIT UVA (320-390)• UVB?, UVV?, UVC?
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Why Calibrate?Balance the amount of IR, Visible and UV the optics and detector “see” with the output signal from the detectorCompensate for changes in the optics over time
SolarizationInstruments used in harsh production & manufacturing environments
Irradiance levels:Sunlight: 18 mW/cm2 Production UV levels: 100’s to 1000’s mW/cm2
Physical damage to instrumentDrop, crush instrument, scratch optics
Optics/instrument coated with ? Electronics checkup
Physical and/or heat related damage
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Solarization of Optics affects absolute measurement and requires maintenance
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Understand your instrument and its limits
Treat and handle as an instrumentMaintain on daily basisCalibrate & service as requiredEquipment Tune-Up
Belt play/bouncinessBelt smoothnessReflector shape
Users expect the same accuracy as other instruments-current radiometer technology ± 10%
Optics Electronics User induced errors and comparisons (real vs. perceived)
Comparison to other products
Reality: Use your instrument with design specs
Avoid PICNIC errors: Problem in chair, not in calibration
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Comparison of EIT Optics Designs
Optical Window/Filter
Aperture opening(s)
Diffuser(s)
Optical Filter
Detector
UV UV
0.25”0.50”
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EIT Generated Work/Assembly Instructions
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Filter-Detector-Composite Responses
Filter Detector Composite
Normal to expect small variations between filtersTradeoff is $ vs. performanceEIT is careful to test each filter to avoid wide variationsSelect & test the optics for better performance and unit to unitcomparisons
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Filter response across lotsUV-A Filters LOT2908A & LOT3806A
0.000
10.000
20.000
30.000
40.000
50.000
60.000
70.000
80.000
90.000
100.000
300
306
312
318
324
330
336
342
348
354
360
366
372
378
384
390
396
402
408
wave length (nm)
%T
Series1Series2Series3Series4Series5theory (1.98mm thk)
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θ
Eθ = E x Cosθ
Cosine Error in Measurement
Spatial Response
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θ
Eθ = E x Cosθ
Cosine Error in Measurement
45o = .7 Watt 90o = 1.0 Watt
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Cos Response Curve of Palm Probe
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
-90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Angle (deg.)
Norm
aliz
ed R
espo
nse
Ideal Cos Response
Palm Probe-Old Optics
Palm Probe-New Optics
Spatial Response of Instruments Goal: Cosine Response
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Radiometer Variations-ThresholdStart threshold: Irradiance level which causes the unit to start measuring UV
Counts all UV past that pointVaries due to scale, electronic response, optics, design
Data threshold: PowerView software allows user to discard all readings below a set rangeChallenge: Long slow runs of low irradiance
Potential for wide variation in energy density-Joules
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Radiometer Variations-Threshold
40 mW
UV
W/c
m2
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Radiometer Variations-TemperatureUnknowingly introduce variations to readings based on the internal temperature of the unitAs detector temperature raises, readings may dropTry to maintain consistent conditions and avoid rapid, repeated, long duration high intensity runsTypical detector variation: -0.2% per °C If it’s too hot to touch – it’s too hot to measureInternal temperature alarms (65 ° C)
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Radiometer Variations-Sample Rate
Unknowingly introduce variations to reading based on the sample rate of the unit
Did the unit collect an adequate number of samples to produce a number you can trust?
Slower is better-irradiance values should be similar, calculate energy density information from the reading at a slow speed
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Time
Instrument with Low Sampling Rate & Fast Belt Speed
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Time
Instrument with High Sampling Rate
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Sample 2 Hz
What works well at one line speed…
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Sample 2 Hz
May not work well at another.
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Sample 6 Hz
The sampling rate must be appropriatefor the process. Typical rates can vary From 25 to 30,000 samples/second
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Radiometer Variations - Sample Rate
Total Time under UV reflector: 0.83 seconds
Time under Peak irradiance: 0.30 seconds
Inst. Sample Rate (#/sec) Samples
25 2040 33
128 106256 212
1024 8502048 1700
Speed: 33 fpm/10 mpm
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Radiometer Variations - Sample Rate
Total Time under UV reflector: 0.18 seconds
Time under Peak irradiance: 0.08 seconds
Inst.SampleRate (#/sec) Samples
25 440 7
128 23256 46
1024 1842048 368
Speed: 240 fpm/74 mpm
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Example: EIT Product ComparisonPP/+ PP/+ II PWRMAP MC
Range (H) 5W 10W 20W (10W) 10WUVA, B, V
UVC5mW- 5W5mW-1W
10 mW-10W 5 mW-1W
200 mW-20 W 20 mW-2W
500 mW-10W (A)
Range (L) 50 mW 100 mW 200 mW 2W
UVA, B, C, V
50µW-50 mW
100µW-100 mW
2-200 mWC: 1-100 mW
100 mW-2W (A)
StartThreshold
5 mW 10 mW 1-2 mW 50 mW (10)10 mW (2)
Smooth ON Both Both OFFSampling 25 25/2048 or
30,000128-2048 2048
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Applications/Product Updates
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UviCure® Plus II & UV Power Puck® II
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UV Power Puck® FLASH
Modified electronics for pulsed sourcesPower Puck Flash-four UV Bandwidths Electronics designed for pulses between 100-120 times/secondProvides energy density valuesUser selectable parameters User changeable batteries
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Pulsed Lamp Source - 4 Pulses
X-Axis Milli
seconds
1 2 3 4
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Pulsed Lamp Source-Single Pulse
X-Axis Micro
seconds
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Pulsed Lamp Source-Linearity
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Dimensional Objects
MarketsAutomotive-fenders, hoods, entire bodiesWood-complex edges, furniture, doors, complex edgesLarge dimensional objects-canopies, boats, SMC tubs & shower stalls, swim spas, coffinsPowder coat applicationsStatic and traveling objects exposed to a robotic UV sourceFlood chambers, small exposure systems
Applications• UV measurement on complex, small-large
objects • Provide information for immediate, real-time
adjustment of lamps• Collect lamp output in different spectral
bandwidths
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3DCURETM
Sensors:Calibrated, Single Spectral Bandwidth RadiometerUVA, UVB, UVC, UVVMix & Match Bandwidths in the same stringProvides mW/cm2 and mJ/cm2
Connect up to 32 sensors in a daisy-chain digital networkSensor mounting adapters (“Positioners”) for convenient permanent positioningPowered by a DCMSize: 1.75” diameter x 0.5 h
DCM-Data Collection Module:Collects and transfers data to a PC via EIT Cure3D SoftwareOperation similar to a PowerMAPProvides power to the sensorsPortable, or tetheredRechargeable batterySize: 4.5 l x 2.75 x 0.8”
EIT Cure3D Software:Provides ActiveX controls for user customization.
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3DCure Data Screen (Cure3D)
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Contact Information for UV measurement articles, questions and support
EIT-Instrument MarketsSGIA Booth 3115
108 Carpenter DriveSterling, VA 20164 USA
P:703-478-0700F:703-478-0815E:[email protected]: eitinc.com
Thank You!Questions?