RayTek ThermoView Ti30 user manual Gob

Page 70

	Material		Emissivity
		1.0µm	1.6µm	8-14µm
	“Gob”	n.r.	0.9	n.r.
Gravel		n.r.	0.95	0.95
Gypsum		n.r.	0.4-0.97	0.8-0.95
Ice		n.r.	—	0.98
Limestone		n.r.	0.4-0.98
Paint (non-Al.)		—	0.9-0.95	0.9-0.95
Paper (any color)		n.r.	0.95	0.95
Plastic (opaque, over 20 mils)		n.r.	0.95	0.95
Rubber		n.r.	0.9	0.95
Sand		n.r.	0.9	0.9
Snow		n.r.	—	0.9
Soil		n.r.	—	0.9-0.98
Water		n.r.	—	0.93
Wood, Natural		n.r.	0.9-0.95

To optimize surface temperature measurement accuracy consider the following:

1.Determine the object emissivity for the spectral range of the instrument to be used for the measurement.

2.Avoid reflections by shielding object from surrounding high temperature sources.

3.For higher temperature objects use shorter wavelength instruments, whenever possible.

4.For semi-transparent materials such as plastic film and glass, assure that the background is uniform and lower in temperature than the object.

5.Hold instrument perpendicular to surface whenever emissivity is less than 0.9. In all cases, do not exceed angles more than 30 degrees from incidence.

July 1, 2003

- 70 -

Version 1.0

i

Tel: (01943) 602001- WWW.ISSLTD.CO.UK - Fax: (01943) 816796

i

Image 70

Contents ThermoView Ti30 User’s ManualContents Qualitative and Quantitative Temperature Measurements Appendix B Infrared Theory Q&A Glossary Warranty Information Customer Service Contact Information Introduction Quick Specifications Table NetdUnpacking Your New Imager Removing the Battery Pack First, the BatteriesBattery Packs Charging the Rechargeable Battery Pack Normal Charge CycleDocking Station LED Indicators Getting Started Attaching the Wrist StrapTurning the Unit On Displaying ImagesInformation Screen Normal Mode Settings and Controls KeypadThermoView Imager Settings Switches icons not shown ThermoView Imager Settings Switches Laser On/Off Toggle ButtonJapanese Laser Aperture and Optical ChannelMeasurement Mode Switch LCD Backlight Illumination SwitchPalette Switch Centigrade/Fahrenheit Toggle ButtonAutomatic Semi Automatic Gain and Level ThumbwheelsFocus Wheel Level pointTrigger Location of the Focus WheelMan Machine Interface Flow Charts Main LoopImage Recording Procedure Emissivity Adjustment Procedure July 1 Version Quick Image Fix Procedure Array Recalibration Procedure Recording an ImageRetrieve Mode Retrieving an ImageInstalling the Software Downloading and Looking at ImagesConnecting the Docking Station to Your Computer Hooking Up the Docking StationConnecting the USB Connector to the USB Port InsideIR Main Screen at Program Launch Downloading Images Sync buttonSaving Images Download Data ScreenSetting the Imager Clock Contents of Images FolderJuly 1 Version Field USB Port Looking at Your Downloaded ImagesViewing Thumbnail Images Viewing a Single Image Importance of Focusing Obtaining the Best ImageSelecting the Measurement Mode Selecting the Color PaletteLevelGain Min Level Gain Max Level Gain Tip Qualitative and Quantitative Temperature Measurements Distance to Target Spot RatioField-of-View Optical DiagramDS ratio D / S = Ambient Temperatures Environmental ConditionsReflected Temperature Compensation EmissivityReflected Temperature Compensation Organizing Your Data File ManagementUploading Data to the Imager Uploading Data to Your ThermoView Ti30 ImagerEditing Data Before Upload RTC OFF Single Image Screen Analyzing Your DataScale Limits Sample Image at Original Scale Limits Sample Image at Original Isotherm Setting IsothermsTemperature Table Tab Additional Image Analysis ToolsTemperature Table Profile TabHistogram Tab Profile TabMenu Bar New FolderFahrenheit ThermoView Imager InfoExit CelsiusCreate Report Export Temperature TableExport Image HistogramCascade Copy Profile ChartContents Tile HorizontalReporting Your Findings Thermographic ReportImager Accuracy Chart Appendix a Technical ReferenceImager Reading Error vs Source DS Typical Emissivity ValuesAluminum Unoxidized Ni-Cu Gob Appendix B Infrared Theory Q&A Why use noncontact infrared thermometers?How does IR work? How to assure accurate temperature measurement? EmissivityDistance to spot ratio Field-of-viewHow to take temperature measurement? What are the most popular applications?Glossary Calibration Background TemperatureBlackbody Calibration SourceEMI/RFI Noise Display ResolutionDrift Far FieldFull Scale Accuracy Focus Point or DistanceFull Scale Gray BodyMicron or µm LaserLoop Minimum spot sizeOptical Pyrometer Optical ResolutionNon-Gray Body Pyroelectric DetectorRelative Humidity Reflected Temperature CompensationResolution RepeatabilityTemperature Coefficient or Ambient Derating Storage Temperature RangeTemperature Spectral ResponseTime Constant Temperature ResolutionThermal Shock Transfer Standard